* [PATCH v3 01/10] config: initialize opts structure in repo_read_config()
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
@ 2019-04-11 15:18 ` Jeff Hostetler via GitGitGadget
2019-04-12 3:52 ` Jonathan Nieder
2019-04-11 15:18 ` [PATCH v3 03/10] trace2: add absolute elapsed time to start event Jeff Hostetler via GitGitGadget
` (10 subsequent siblings)
11 siblings, 1 reply; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-11 15:18 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Initialize opts structure in repo_read_config().
This change fixes a crash in later commit after a new field is added
to the structure.
In commit 3b256228a66f8587661481ef3e08259864f3ba2a, repo_read_config()
was added. It only initializes 3 fields in the opts structure. It is
passed to config_with_options() and then to do_git_config_sequence().
However, do_git_config_sequence() drops the opts on the floor and calls
git_config_from_file() rather than git_config_from_file_with_options(),
so that may be why this hasn't been a problem in the past.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
config.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/config.c b/config.c
index 0f0cdd8c0f..8e5f45fa20 100644
--- a/config.c
+++ b/config.c
@@ -2011,7 +2011,7 @@ int git_configset_get_pathname(struct config_set *cs, const char *key, const cha
/* Functions use to read configuration from a repository */
static void repo_read_config(struct repository *repo)
{
- struct config_options opts;
+ struct config_options opts = {0};
opts.respect_includes = 1;
opts.commondir = repo->commondir;
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* Re: [PATCH v3 01/10] config: initialize opts structure in repo_read_config()
2019-04-11 15:18 ` [PATCH v3 01/10] config: initialize opts structure in repo_read_config() Jeff Hostetler via GitGitGadget
@ 2019-04-12 3:52 ` Jonathan Nieder
2019-04-15 14:34 ` Johannes Schindelin
0 siblings, 1 reply; 68+ messages in thread
From: Jonathan Nieder @ 2019-04-12 3:52 UTC (permalink / raw)
To: Jeff Hostetler via GitGitGadget
Cc: git, gitster, peff, steadmon, avarab, Jeff Hostetler
Hi,
Jeff Hostetler wrote:
> Initialize opts structure in repo_read_config().
Good find. I wonder if there are some flags we can turn on with
DEVELOPER=1 to prevent this kind of issue going undetected in the
future (or maybe this means we need to get the valgrind or ASan
testing modes to be fast enough for people to consistently run them).
[...]
> config.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Thanks.
^ permalink raw reply [flat|nested] 68+ messages in thread
* Re: [PATCH v3 01/10] config: initialize opts structure in repo_read_config()
2019-04-12 3:52 ` Jonathan Nieder
@ 2019-04-15 14:34 ` Johannes Schindelin
0 siblings, 0 replies; 68+ messages in thread
From: Johannes Schindelin @ 2019-04-15 14:34 UTC (permalink / raw)
To: Jonathan Nieder
Cc: Jeff Hostetler via GitGitGadget, git, gitster, peff, steadmon,
avarab, Jeff Hostetler
Hi Jonathan,
On Thu, 11 Apr 2019, Jonathan Nieder wrote:
> Jeff Hostetler wrote:
>
> > Initialize opts structure in repo_read_config().
>
> Good find.
Heh, it really was our CI that found it, and it was I (with valgrind's
help) who identified the problem and proposed the fix. So: thank you!
> I wonder if there are some flags we can turn on with
> DEVELOPER=1 to prevent this kind of issue going undetected in the
> future (or maybe this means we need to get the valgrind or ASan
> testing modes to be fast enough for people to consistently run them).
Sadly, I do not think that either is an option. Such uninitialized memory
is really hard to catch without in-depth analysis, so DEVELOPER=1 is out.
And `valgrind` (or the faster alternative, DrMemory) have to spend quite a
bit of time to do what they do, and it is unlikely that that could ever be
made faster.
A better approach might be static analysis (and I do not mean the diet
coke of static analysis that we run as part of our CI, but something as
powerful as Coverity).
Sadly, Coverity makes it super hard to switch off false positives
regarding e.g. our use of FLEX_ARRAY or strbuf's strbuf_slopbuf.
For quite a while, I wanted to play with [infer](https://fbinfer.com/), in
the hopes that it would be possible to do customize what cannot be
customized with Coverity. Alas, their use of OCaml (why do they make it so
hard?) puts quite the bit of a road block ahead of me in that endeavor.
Ciao,
Dscho
^ permalink raw reply [flat|nested] 68+ messages in thread
* [PATCH v3 03/10] trace2: add absolute elapsed time to start event
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 01/10] config: initialize opts structure in repo_read_config() Jeff Hostetler via GitGitGadget
@ 2019-04-11 15:18 ` Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 02/10] trace2: refactor setting process starting time Jeff Hostetler via GitGitGadget
` (9 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-11 15:18 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Add elapsed process time to "start" event to measure
the performance of early process startup.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 11 ++++++-----
t/t0211-trace2-perf.sh | 12 ++++++------
trace2.c | 8 +++++++-
trace2/tr2_tgt.h | 1 +
trace2/tr2_tgt_event.c | 5 ++++-
trace2/tr2_tgt_normal.c | 3 ++-
trace2/tr2_tgt_perf.c | 7 ++++---
7 files changed, 30 insertions(+), 17 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index f37fccf1da..baaa1153bb 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -60,7 +60,7 @@ git version 2.20.1.155.g426c96fcdb
------------
$ cat ~/log.perf
12:28:42.620675 common-main.c:38 | d0 | main | version | | | | | 2.20.1.155.g426c96fcdb
-12:28:42.621001 common-main.c:39 | d0 | main | start | | | | | git version
+12:28:42.621001 common-main.c:39 | d0 | main | start | | 0.001173 | | | git version
12:28:42.621111 git.c:432 | d0 | main | cmd_name | | | | | version (version)
12:28:42.621225 git.c:662 | d0 | main | exit | | 0.001227 | | | code:0
12:28:42.621259 trace2/tr2_tgt_perf.c:211 | d0 | main | atexit | | 0.001265 | | | code:0
@@ -79,7 +79,7 @@ git version 2.20.1.155.g426c96fcdb
------------
$ cat ~/log.event
{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.620713","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621027","file":"common-main.c","line":39,"argv":["git","version"]}
+{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621027","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621122","file":"git.c","line":432,"name":"version","hierarchy":"version"}
{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621236","file":"git.c","line":662,"t_abs":0.001227,"code":0}
{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621268","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
@@ -601,6 +601,7 @@ from all events and the `time` field is only present on the "start" and
{
"event":"start",
...
+ "t_abs":0.001227, # elapsed time in seconds
"argv":["git","version"]
}
------------
@@ -1118,7 +1119,7 @@ $ git status
$ cat ~/log.perf
d0 | main | version | | | | | 2.20.1.160.g5676107ecd.dirty
-d0 | main | start | | | | | git status
+d0 | main | start | | 0.001173 | | | git status
d0 | main | def_repo | r1 | | | | worktree:/Users/jeffhost/work/gfw
d0 | main | cmd_name | | | | | status (status)
...
@@ -1163,7 +1164,7 @@ $ git status
...
$ cat ~/log.perf
d0 | main | version | | | | | 2.20.1.162.gb4ccea44db.dirty
-d0 | main | start | | | | | git status
+d0 | main | start | | 0.001173 | | | git status
d0 | main | def_repo | r1 | | | | worktree:/Users/jeffhost/work/gfw
d0 | main | cmd_name | | | | | status (status)
...
@@ -1219,7 +1220,7 @@ $ git status
...
$ cat ~/log.perf
d0 | main | version | | | | | 2.20.1.156.gf9916ae094.dirty
-d0 | main | start | | | | | git status
+d0 | main | start | | 0.001173 | | | git status
d0 | main | def_repo | r1 | | | | worktree:/Users/jeffhost/work/gfw
d0 | main | cmd_name | | | | | status (status)
d0 | main | region_enter | r1 | 0.001791 | | index | label:do_read_index .git/index
diff --git a/t/t0211-trace2-perf.sh b/t/t0211-trace2-perf.sh
index 953e2f7847..c9694b29f7 100755
--- a/t/t0211-trace2-perf.sh
+++ b/t/t0211-trace2-perf.sh
@@ -50,7 +50,7 @@ test_expect_success 'perf stream, return code 0' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 001return 0
+ d0|main|start||_T_ABS_|||_EXE_ trace2 001return 0
d0|main|cmd_name|||||trace2 (trace2)
d0|main|exit||_T_ABS_|||code:0
d0|main|atexit||_T_ABS_|||code:0
@@ -64,7 +64,7 @@ test_expect_success 'perf stream, return code 1' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 001return 1
+ d0|main|start||_T_ABS_|||_EXE_ trace2 001return 1
d0|main|cmd_name|||||trace2 (trace2)
d0|main|exit||_T_ABS_|||code:1
d0|main|atexit||_T_ABS_|||code:1
@@ -82,7 +82,7 @@ test_expect_success 'perf stream, error event' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 003error '\''hello world'\'' '\''this is a test'\''
+ d0|main|start||_T_ABS_|||_EXE_ trace2 003error '\''hello world'\'' '\''this is a test'\''
d0|main|cmd_name|||||trace2 (trace2)
d0|main|error|||||hello world
d0|main|error|||||this is a test
@@ -128,15 +128,15 @@ test_expect_success 'perf stream, child processes' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 004child test-tool trace2 004child test-tool trace2 001return 0
+ d0|main|start||_T_ABS_|||_EXE_ trace2 004child test-tool trace2 004child test-tool trace2 001return 0
d0|main|cmd_name|||||trace2 (trace2)
d0|main|child_start||_T_ABS_|||[ch0] class:? argv: test-tool trace2 004child test-tool trace2 001return 0
d1|main|version|||||$V
- d1|main|start|||||_EXE_ trace2 004child test-tool trace2 001return 0
+ d1|main|start||_T_ABS_|||_EXE_ trace2 004child test-tool trace2 001return 0
d1|main|cmd_name|||||trace2 (trace2/trace2)
d1|main|child_start||_T_ABS_|||[ch0] class:? argv: test-tool trace2 001return 0
d2|main|version|||||$V
- d2|main|start|||||_EXE_ trace2 001return 0
+ d2|main|start||_T_ABS_|||_EXE_ trace2 001return 0
d2|main|cmd_name|||||trace2 (trace2/trace2/trace2)
d2|main|exit||_T_ABS_|||code:0
d2|main|atexit||_T_ABS_|||code:0
diff --git a/trace2.c b/trace2.c
index 6dd51e6aa5..1c180062dd 100644
--- a/trace2.c
+++ b/trace2.c
@@ -182,13 +182,19 @@ void trace2_cmd_start_fl(const char *file, int line, const char **argv)
{
struct tr2_tgt *tgt_j;
int j;
+ uint64_t us_now;
+ uint64_t us_elapsed_absolute;
if (!trace2_enabled)
return;
+ us_now = getnanotime() / 1000;
+ us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
+
for_each_wanted_builtin (j, tgt_j)
if (tgt_j->pfn_start_fl)
- tgt_j->pfn_start_fl(file, line, argv);
+ tgt_j->pfn_start_fl(file, line, us_elapsed_absolute,
+ argv);
}
int trace2_cmd_exit_fl(const char *file, int line, int code)
diff --git a/trace2/tr2_tgt.h b/trace2/tr2_tgt.h
index 297bb8ffbe..7b90469212 100644
--- a/trace2/tr2_tgt.h
+++ b/trace2/tr2_tgt.h
@@ -15,6 +15,7 @@ typedef void(tr2_tgt_term_t)(void);
typedef void(tr2_tgt_evt_version_fl_t)(const char *file, int line);
typedef void(tr2_tgt_evt_start_fl_t)(const char *file, int line,
+ uint64_t us_elapsed_absolute,
const char **argv);
typedef void(tr2_tgt_evt_exit_fl_t)(const char *file, int line,
uint64_t us_elapsed_absolute, int code);
diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
index 107cb5317d..89a4d3ae9a 100644
--- a/trace2/tr2_tgt_event.c
+++ b/trace2/tr2_tgt_event.c
@@ -122,13 +122,16 @@ static void fn_version_fl(const char *file, int line)
jw_release(&jw);
}
-static void fn_start_fl(const char *file, int line, const char **argv)
+static void fn_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char **argv)
{
const char *event_name = "start";
struct json_writer jw = JSON_WRITER_INIT;
+ double t_abs = (double)us_elapsed_absolute / 1000000.0;
jw_object_begin(&jw, 0);
event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_double(&jw, "t_abs", 6, t_abs);
jw_object_inline_begin_array(&jw, "argv");
jw_array_argv(&jw, argv);
jw_end(&jw);
diff --git a/trace2/tr2_tgt_normal.c b/trace2/tr2_tgt_normal.c
index 547183d5b6..57f3e18f5b 100644
--- a/trace2/tr2_tgt_normal.c
+++ b/trace2/tr2_tgt_normal.c
@@ -81,7 +81,8 @@ static void fn_version_fl(const char *file, int line)
strbuf_release(&buf_payload);
}
-static void fn_start_fl(const char *file, int line, const char **argv)
+static void fn_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char **argv)
{
struct strbuf buf_payload = STRBUF_INIT;
diff --git a/trace2/tr2_tgt_perf.c b/trace2/tr2_tgt_perf.c
index f0746fcf86..9c3b4d8a0f 100644
--- a/trace2/tr2_tgt_perf.c
+++ b/trace2/tr2_tgt_perf.c
@@ -159,15 +159,16 @@ static void fn_version_fl(const char *file, int line)
strbuf_release(&buf_payload);
}
-static void fn_start_fl(const char *file, int line, const char **argv)
+static void fn_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char **argv)
{
const char *event_name = "start";
struct strbuf buf_payload = STRBUF_INIT;
sq_quote_argv_pretty(&buf_payload, argv);
- perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
- &buf_payload);
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ NULL, NULL, &buf_payload);
strbuf_release(&buf_payload);
}
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v3 02/10] trace2: refactor setting process starting time
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 01/10] config: initialize opts structure in repo_read_config() Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 03/10] trace2: add absolute elapsed time to start event Jeff Hostetler via GitGitGadget
@ 2019-04-11 15:18 ` Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 04/10] trace2: find exec-dir before trace2 initialization Jeff Hostetler via GitGitGadget
` (8 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-11 15:18 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Create trace2_initialize_clock() and call from main() to capture
process start time in isolation and before other sub-systems are
ready.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 12 ++++++--
common-main.c | 2 ++
compat/mingw.c | 2 ++
trace2.c | 7 ++++-
trace2.h | 17 ++++++++++++
trace2/tr2_tls.c | 38 ++++++++++++++++----------
trace2/tr2_tls.h | 8 +++++-
7 files changed, 67 insertions(+), 19 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index 2de565fa3d..f37fccf1da 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -160,17 +160,23 @@ purposes.
These are concerned with the lifetime of the overall git process.
+`void trace2_initialize_clock()`::
+
+ Initialize the Trace2 start clock and nothing else. This should
+ be called at the very top of main() to capture the process start
+ time and reduce startup order dependencies.
+
`void trace2_initialize()`::
Determines if any Trace2 Targets should be enabled and
- initializes the Trace2 facility. This includes starting the
- elapsed time clocks and thread local storage (TLS).
+ initializes the Trace2 facility. This includes setting up the
+ Trace2 thread local storage (TLS).
+
This function emits a "version" message containing the version of git
and the Trace2 protocol.
+
This function should be called from `main()` as early as possible in
-the life of the process.
+the life of the process after essential process initialization.
`int trace2_is_enabled()`::
diff --git a/common-main.c b/common-main.c
index d484aec209..6137af0e63 100644
--- a/common-main.c
+++ b/common-main.c
@@ -27,6 +27,8 @@ int main(int argc, const char **argv)
{
int result;
+ trace2_initialize_clock();
+
/*
* Always open file descriptors 0/1/2 to avoid clobbering files
* in die(). It also avoids messing up when the pipes are dup'ed
diff --git a/compat/mingw.c b/compat/mingw.c
index 6b04514cdc..a2f74aca6a 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -2569,6 +2569,8 @@ void mingw_startup(void)
wchar_t **wenv, **wargv;
_startupinfo si;
+ trace2_initialize_clock();
+
maybe_redirect_std_handles();
/* get wide char arguments and environment */
diff --git a/trace2.c b/trace2.c
index ccccd4ef09..6dd51e6aa5 100644
--- a/trace2.c
+++ b/trace2.c
@@ -142,6 +142,11 @@ static void tr2main_signal_handler(int signo)
raise(signo);
}
+void trace2_initialize_clock(void)
+{
+ tr2tls_start_process_clock();
+}
+
void trace2_initialize_fl(const char *file, int line)
{
struct tr2_tgt *tgt_j;
@@ -428,7 +433,7 @@ void trace2_thread_start_fl(const char *file, int line, const char *thread_name)
us_now = getnanotime() / 1000;
us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
- tr2tls_create_self(thread_name);
+ tr2tls_create_self(thread_name, us_now);
for_each_wanted_builtin (j, tgt_j)
if (tgt_j->pfn_thread_start_fl)
diff --git a/trace2.h b/trace2.h
index ae5020d0e6..8f89e70c44 100644
--- a/trace2.h
+++ b/trace2.h
@@ -19,6 +19,23 @@ struct json_writer;
* [] trace2_printf* -- legacy trace[1] messages.
*/
+/*
+ * Initialize the TRACE2 clock and do nothing else, in particular
+ * no mallocs, no system inspection, and no environment inspection.
+ *
+ * This should be called at the very top of main() to capture the
+ * process start time. This is intended to reduce chicken-n-egg
+ * bootstrap pressure.
+ *
+ * It is safe to call this more than once. This allows capturing
+ * absolute startup costs on Windows which uses a little trickery
+ * to do setup work before common-main.c:main() is called.
+ *
+ * The main trace2_initialize_fl() may be called a little later
+ * after more infrastructure is established.
+ */
+void trace2_initialize_clock(void);
+
/*
* Initialize TRACE2 tracing facility if any of the builtin TRACE2
* targets are enabled in the environment. Emits a 'version' event.
diff --git a/trace2/tr2_tls.c b/trace2/tr2_tls.c
index 8e65b0361d..31fb529f93 100644
--- a/trace2/tr2_tls.c
+++ b/trace2/tr2_tls.c
@@ -10,16 +10,30 @@
#define TR2_REGION_NESTING_INITIAL_SIZE (100)
static struct tr2tls_thread_ctx *tr2tls_thread_main;
-static uint64_t tr2tls_us_start_main;
+static uint64_t tr2tls_us_start_process;
static pthread_mutex_t tr2tls_mutex;
static pthread_key_t tr2tls_key;
static int tr2_next_thread_id; /* modify under lock */
-struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name)
+void tr2tls_start_process_clock(void)
+{
+ if (tr2tls_us_start_process)
+ return;
+
+ /*
+ * Keep the absolute start time of the process (i.e. the main
+ * process) in a fixed variable since other threads need to
+ * access it. This allows them to do that without a lock on
+ * main thread's array data (because of reallocs).
+ */
+ tr2tls_us_start_process = getnanotime() / 1000;
+}
+
+struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name,
+ uint64_t us_thread_start)
{
- uint64_t us_now = getnanotime() / 1000;
struct tr2tls_thread_ctx *ctx = xcalloc(1, sizeof(*ctx));
/*
@@ -29,7 +43,7 @@ struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name)
*/
ctx->alloc = TR2_REGION_NESTING_INITIAL_SIZE;
ctx->array_us_start = (uint64_t *)xcalloc(ctx->alloc, sizeof(uint64_t));
- ctx->array_us_start[ctx->nr_open_regions++] = us_now;
+ ctx->array_us_start[ctx->nr_open_regions++] = us_thread_start;
ctx->thread_id = tr2tls_locked_increment(&tr2_next_thread_id);
@@ -55,7 +69,7 @@ struct tr2tls_thread_ctx *tr2tls_get_self(void)
* here and silently continue.
*/
if (!ctx)
- ctx = tr2tls_create_self("unknown");
+ ctx = tr2tls_create_self("unknown", getnanotime() / 1000);
return ctx;
}
@@ -124,22 +138,18 @@ uint64_t tr2tls_absolute_elapsed(uint64_t us)
if (!tr2tls_thread_main)
return 0;
- return us - tr2tls_us_start_main;
+ return us - tr2tls_us_start_process;
}
void tr2tls_init(void)
{
+ tr2tls_start_process_clock();
+
pthread_key_create(&tr2tls_key, NULL);
init_recursive_mutex(&tr2tls_mutex);
- tr2tls_thread_main = tr2tls_create_self("main");
- /*
- * Keep a copy of the absolute start time of the main thread
- * in a fixed variable since other threads need to access it.
- * This also eliminates the need to lock accesses to the main
- * thread's array (because of reallocs).
- */
- tr2tls_us_start_main = tr2tls_thread_main->array_us_start[0];
+ tr2tls_thread_main = tr2tls_create_self("main",
+ tr2tls_us_start_process);
}
void tr2tls_release(void)
diff --git a/trace2/tr2_tls.h b/trace2/tr2_tls.h
index bb80e3f8e7..b1e327a928 100644
--- a/trace2/tr2_tls.h
+++ b/trace2/tr2_tls.h
@@ -31,7 +31,8 @@ struct tr2tls_thread_ctx {
* In this and all following functions the term "self" refers to the
* current thread.
*/
-struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name);
+struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name,
+ uint64_t us_thread_start);
/*
* Get our TLS data.
@@ -94,4 +95,9 @@ void tr2tls_release(void);
*/
int tr2tls_locked_increment(int *p);
+/*
+ * Capture the process start time and do nothing else.
+ */
+void tr2tls_start_process_clock(void);
+
#endif /* TR2_TLS_H */
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v3 04/10] trace2: find exec-dir before trace2 initialization
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
` (2 preceding siblings ...)
2019-04-11 15:18 ` [PATCH v3 02/10] trace2: refactor setting process starting time Jeff Hostetler via GitGitGadget
@ 2019-04-11 15:18 ` Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 05/10] config: add read_very_early_config() Jeff Hostetler via GitGitGadget
` (7 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-11 15:18 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Teach Git to resolve the executable directory before initializing
Trace2. This allows the system configuration directory to be
discovered earlier (because it is sometimes relative to the prefix
or runtime-prefix).
This will be used by the next commit to allow trace2 settings to
be loaded from the system config.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
common-main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/common-main.c b/common-main.c
index 6137af0e63..299ca62a72 100644
--- a/common-main.c
+++ b/common-main.c
@@ -37,12 +37,12 @@ int main(int argc, const char **argv)
sanitize_stdfds();
restore_sigpipe_to_default();
+ git_resolve_executable_dir(argv[0]);
+
trace2_initialize();
trace2_cmd_start(argv);
trace2_collect_process_info();
- git_resolve_executable_dir(argv[0]);
-
git_setup_gettext();
initialize_the_repository();
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v3 05/10] config: add read_very_early_config()
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
` (3 preceding siblings ...)
2019-04-11 15:18 ` [PATCH v3 04/10] trace2: find exec-dir before trace2 initialization Jeff Hostetler via GitGitGadget
@ 2019-04-11 15:18 ` Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 06/10] trace2: use system/global config for default trace2 settings Jeff Hostetler via GitGitGadget
` (6 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-11 15:18 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Created an even lighter version of read_early_config() that
only looks at system and global config settings. It omits
repo-local, worktree-local, and command-line settings.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
config.c | 25 ++++++++++++++++++++++---
config.h | 4 ++++
2 files changed, 26 insertions(+), 3 deletions(-)
diff --git a/config.c b/config.c
index 8e5f45fa20..5b10f18088 100644
--- a/config.c
+++ b/config.c
@@ -1688,14 +1688,16 @@ static int do_git_config_sequence(const struct config_options *opts,
ret += git_config_from_file(fn, user_config, data);
current_parsing_scope = CONFIG_SCOPE_REPO;
- if (repo_config && !access_or_die(repo_config, R_OK, 0))
+ if (!opts->ignore_repo &&
+ repo_config && !access_or_die(repo_config, R_OK, 0))
ret += git_config_from_file(fn, repo_config, data);
/*
* Note: this should have a new scope, CONFIG_SCOPE_WORKTREE.
* But let's not complicate things before it's actually needed.
*/
- if (repository_format_worktree_config) {
+ if (!opts->ignore_worktree &&
+ repository_format_worktree_config) {
char *path = git_pathdup("config.worktree");
if (!access_or_die(path, R_OK, 0))
ret += git_config_from_file(fn, path, data);
@@ -1703,7 +1705,8 @@ static int do_git_config_sequence(const struct config_options *opts,
}
current_parsing_scope = CONFIG_SCOPE_CMDLINE;
- if (git_config_from_parameters(fn, data) < 0)
+ if (!opts->ignore_cmdline &&
+ git_config_from_parameters(fn, data) < 0)
die(_("unable to parse command-line config"));
current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
@@ -1794,6 +1797,22 @@ void read_early_config(config_fn_t cb, void *data)
strbuf_release(&gitdir);
}
+/*
+ * Read config but only enumerate system and global settings.
+ * Omit any repo-local, worktree-local, or command-line settings.
+ */
+void read_very_early_config(config_fn_t cb, void *data)
+{
+ struct config_options opts = {0};
+
+ opts.respect_includes = 1;
+ opts.ignore_repo = 1;
+ opts.ignore_worktree = 1;
+ opts.ignore_cmdline = 1;
+
+ config_with_options(cb, data, NULL, &opts);
+}
+
static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
{
struct config_set_element k;
diff --git a/config.h b/config.h
index ee5d3fa7b4..6a58d61d22 100644
--- a/config.h
+++ b/config.h
@@ -55,6 +55,9 @@ typedef int (*config_parser_event_fn_t)(enum config_event_t type,
struct config_options {
unsigned int respect_includes : 1;
+ unsigned int ignore_repo : 1;
+ unsigned int ignore_worktree : 1;
+ unsigned int ignore_cmdline : 1;
const char *commondir;
const char *git_dir;
config_parser_event_fn_t event_fn;
@@ -83,6 +86,7 @@ extern int git_config_from_blob_oid(config_fn_t fn, const char *name,
extern void git_config_push_parameter(const char *text);
extern int git_config_from_parameters(config_fn_t fn, void *data);
extern void read_early_config(config_fn_t cb, void *data);
+extern void read_very_early_config(config_fn_t cb, void *data);
extern void git_config(config_fn_t fn, void *);
extern int config_with_options(config_fn_t fn, void *,
struct git_config_source *config_source,
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v3 06/10] trace2: use system/global config for default trace2 settings
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
` (4 preceding siblings ...)
2019-04-11 15:18 ` [PATCH v3 05/10] config: add read_very_early_config() Jeff Hostetler via GitGitGadget
@ 2019-04-11 15:18 ` Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 07/10] trace2: report peak memory usage of the process Jeff Hostetler via GitGitGadget
` (5 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-11 15:18 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Teach git to read the system and global config files for
default Trace2 settings. This allows system-wide Trace2 settings to
be installed and inherited to make it easier to manage a collection of
systems.
The original GIT_TR2* environment variables are loaded afterwards and
can be used to override the system settings.
Only the system and global config files are used. Repo and worktree
local config files are ignored. Likewise, the "-c" command line
arguments are also ignored. These limits are for performance reasons.
(1) For users not using Trace2, there should be minimal overhead to
detect that Trace2 is not enabled. In particular, Trace2 should not
allocate lots of otherwise unused data strucutres.
(2) For accurate performance measurements, Trace2 should be initialized
as early in the git process as possible, and before most of the normal
git process initialization (which involves discovering the .git directory
and reading a hierarchy of config files).
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Makefile | 1 +
t/t0210-trace2-normal.sh | 49 +++++++++++++--
t/t0211-trace2-perf.sh | 31 ++++++++--
t/t0212-trace2-event.sh | 42 +++++++++++--
trace2.c | 4 ++
trace2.h | 12 ++--
trace2/tr2_cfg.c | 7 +--
trace2/tr2_dst.c | 24 ++++----
trace2/tr2_dst.h | 3 +-
trace2/tr2_sysenv.c | 127 +++++++++++++++++++++++++++++++++++++++
trace2/tr2_sysenv.h | 36 +++++++++++
trace2/tr2_tgt_event.c | 46 +++++++-------
trace2/tr2_tgt_normal.c | 16 ++---
trace2/tr2_tgt_perf.c | 16 ++---
14 files changed, 338 insertions(+), 76 deletions(-)
create mode 100644 trace2/tr2_sysenv.c
create mode 100644 trace2/tr2_sysenv.h
diff --git a/Makefile b/Makefile
index 3e03290d8f..9ddfa3dfe7 100644
--- a/Makefile
+++ b/Makefile
@@ -1005,6 +1005,7 @@ LIB_OBJS += trace2/tr2_cfg.o
LIB_OBJS += trace2/tr2_cmd_name.o
LIB_OBJS += trace2/tr2_dst.o
LIB_OBJS += trace2/tr2_sid.o
+LIB_OBJS += trace2/tr2_sysenv.o
LIB_OBJS += trace2/tr2_tbuf.o
LIB_OBJS += trace2/tr2_tgt_event.o
LIB_OBJS += trace2/tr2_tgt_normal.o
diff --git a/t/t0210-trace2-normal.sh b/t/t0210-trace2-normal.sh
index 03a0aedb1d..4e2d4c7997 100755
--- a/t/t0210-trace2-normal.sh
+++ b/t/t0210-trace2-normal.sh
@@ -1,5 +1,10 @@
#!/bin/sh
+# Turn off any inherited trace2 settings for this test.
+unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
+unset GIT_TR2_BRIEF
+unset GIT_TR2_CONFIG_PARAMS
+
test_description='test trace2 facility (normal target)'
. ./test-lib.sh
@@ -15,11 +20,6 @@ PATH="$TTDIR:$PATH" && export PATH
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
-# Turn off any inherited trace2 settings for this test.
-unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-unset GIT_TR2_BRIEF
-unset GIT_TR2_CONFIG_PARAMS
-
V=$(git version | sed -e 's/^git version //') && export V
# There are multiple trace2 targets: normal, perf, and event.
@@ -132,4 +132,43 @@ test_expect_success 'normal stream, error event' '
test_cmp expect actual
'
+unset GIT_TR2_BRIEF
+
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
+
+test_expect_success 'using global config, normal stream, return code 0' '
+ test_when_finished "rm trace.normal actual expect" &&
+ test_config_global trace2.normalBrief 1 &&
+ test_config_global trace2.normalTarget "$(pwd)/trace.normal" &&
+ test-tool trace2 001return 0 &&
+ perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+ cat >expect <<-EOF &&
+ version $V
+ start _EXE_ trace2 001return 0
+ cmd_name trace2 (trace2)
+ exit elapsed:_TIME_ code:0
+ atexit elapsed:_TIME_ code:0
+ EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'using global config with include' '
+ test_when_finished "rm trace.normal actual expect real.gitconfig" &&
+ test_config_global trace2.normalBrief 1 &&
+ test_config_global trace2.normalTarget "$(pwd)/trace.normal" &&
+ mv "$(pwd)/.gitconfig" "$(pwd)/real.gitconfig" &&
+ test_config_global include.path "$(pwd)/real.gitconfig" &&
+ test-tool trace2 001return 0 &&
+ perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+ cat >expect <<-EOF &&
+ version $V
+ start _EXE_ trace2 001return 0
+ cmd_name trace2 (trace2)
+ exit elapsed:_TIME_ code:0
+ atexit elapsed:_TIME_ code:0
+ EOF
+ test_cmp expect actual
+'
+
test_done
diff --git a/t/t0211-trace2-perf.sh b/t/t0211-trace2-perf.sh
index c9694b29f7..2a90e56db3 100755
--- a/t/t0211-trace2-perf.sh
+++ b/t/t0211-trace2-perf.sh
@@ -1,5 +1,10 @@
#!/bin/sh
+# Turn off any inherited trace2 settings for this test.
+unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
+unset GIT_TR2_PERF_BRIEF
+unset GIT_TR2_CONFIG_PARAMS
+
test_description='test trace2 facility (perf target)'
. ./test-lib.sh
@@ -15,11 +20,6 @@ PATH="$TTDIR:$PATH" && export PATH
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
-# Turn off any inherited trace2 settings for this test.
-unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-unset GIT_TR2_PERF_BRIEF
-unset GIT_TR2_CONFIG_PARAMS
-
V=$(git version | sed -e 's/^git version //') && export V
# There are multiple trace2 targets: normal, perf, and event.
@@ -150,4 +150,25 @@ test_expect_success 'perf stream, child processes' '
test_cmp expect actual
'
+unset GIT_TR2_PERF_BRIEF
+
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
+
+test_expect_success 'using global config, perf stream, return code 0' '
+ test_when_finished "rm trace.perf actual expect" &&
+ test_config_global trace2.perfBrief 1 &&
+ test_config_global trace2.perfTarget "$(pwd)/trace.perf" &&
+ test-tool trace2 001return 0 &&
+ perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
+ cat >expect <<-EOF &&
+ d0|main|version|||||$V
+ d0|main|start||_T_ABS_|||_EXE_ trace2 001return 0
+ d0|main|cmd_name|||||trace2 (trace2)
+ d0|main|exit||_T_ABS_|||code:0
+ d0|main|atexit||_T_ABS_|||code:0
+ EOF
+ test_cmp expect actual
+'
+
test_done
diff --git a/t/t0212-trace2-event.sh b/t/t0212-trace2-event.sh
index 028b6c5671..a3943561c3 100755
--- a/t/t0212-trace2-event.sh
+++ b/t/t0212-trace2-event.sh
@@ -1,5 +1,10 @@
#!/bin/sh
+# Turn off any inherited trace2 settings for this test.
+unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
+unset GIT_TR2_BARE
+unset GIT_TR2_CONFIG_PARAMS
+
test_description='test trace2 facility'
. ./test-lib.sh
@@ -17,11 +22,6 @@ PATH="$TTDIR:$PATH" && export PATH
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
-# Turn off any inherited trace2 settings for this test.
-unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-unset GIT_TR2_BARE
-unset GIT_TR2_CONFIG_PARAMS
-
V=$(git version | sed -e 's/^git version //') && export V
# There are multiple trace2 targets: normal, perf, and event.
@@ -233,4 +233,36 @@ test_expect_success JSON_PP 'basic trace2_data' '
test_cmp expect actual
'
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
+
+test_expect_success JSON_PP 'using global config, event stream, error event' '
+ test_when_finished "rm trace.event actual expect" &&
+ test_config_global trace2.eventTarget "$(pwd)/trace.event" &&
+ test-tool trace2 003error "hello world" "this is a test" &&
+ perl "$TEST_DIRECTORY/t0212/parse_events.perl" <trace.event >actual &&
+ sed -e "s/^|//" >expect <<-EOF &&
+ |VAR1 = {
+ | "_SID0_":{
+ | "argv":[
+ | "_EXE_",
+ | "trace2",
+ | "003error",
+ | "hello world",
+ | "this is a test"
+ | ],
+ | "errors":[
+ | "%s",
+ | "%s"
+ | ],
+ | "exit_code":0,
+ | "hierarchy":"trace2",
+ | "name":"trace2",
+ | "version":"$V"
+ | }
+ |};
+ EOF
+ test_cmp expect actual
+'
+
test_done
diff --git a/trace2.c b/trace2.c
index 1c180062dd..490b3f071e 100644
--- a/trace2.c
+++ b/trace2.c
@@ -10,6 +10,7 @@
#include "trace2/tr2_cmd_name.h"
#include "trace2/tr2_dst.h"
#include "trace2/tr2_sid.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
@@ -120,6 +121,7 @@ static void tr2main_atexit_handler(void)
tr2_sid_release();
tr2_cmd_name_release();
tr2_cfg_free_patterns();
+ tr2_sysenv_release();
trace2_enabled = 0;
}
@@ -155,6 +157,8 @@ void trace2_initialize_fl(const char *file, int line)
if (trace2_enabled)
return;
+ tr2_sysenv_load();
+
if (!tr2_tgt_want_builtins())
return;
trace2_enabled = 1;
diff --git a/trace2.h b/trace2.h
index 8f89e70c44..894bfca7e0 100644
--- a/trace2.h
+++ b/trace2.h
@@ -38,7 +38,8 @@ void trace2_initialize_clock(void);
/*
* Initialize TRACE2 tracing facility if any of the builtin TRACE2
- * targets are enabled in the environment. Emits a 'version' event.
+ * targets are enabled in the system config or the environment.
+ * Emits a 'version' event.
*
* Cleanup/Termination is handled automatically by a registered
* atexit() routine.
@@ -125,10 +126,11 @@ void trace2_cmd_alias_fl(const char *file, int line, const char *alias,
* Emit one or more 'def_param' events for "interesting" configuration
* settings.
*
- * The environment variable "GIT_TR2_CONFIG_PARAMS" can be set to a
- * list of patterns considered important. For example:
- *
- * GIT_TR2_CONFIG_PARAMS="core.*,remote.*.url"
+ * Use the TR2_SYSENV_CFG_PARAM setting to register a comma-separated
+ * list of patterns configured important. For example:
+ * git config --system trace2.configParams 'core.*,remote.*.url'
+ * or:
+ * GIT_TR2_CONFIG_PARAMS=core.*,remote.*.url"
*
* Note: this routine does a read-only iteration on the config data
* (using read_early_config()), so it must not be called until enough
diff --git a/trace2/tr2_cfg.c b/trace2/tr2_cfg.c
index b329921ac5..caa7f06948 100644
--- a/trace2/tr2_cfg.c
+++ b/trace2/tr2_cfg.c
@@ -1,8 +1,7 @@
#include "cache.h"
#include "config.h"
-#include "tr2_cfg.h"
-
-#define TR2_ENVVAR_CFG_PARAM "GIT_TR2_CONFIG_PARAMS"
+#include "trace2/tr2_cfg.h"
+#include "trace2/tr2_sysenv.h"
static struct strbuf **tr2_cfg_patterns;
static int tr2_cfg_count_patterns;
@@ -21,7 +20,7 @@ static int tr2_cfg_load_patterns(void)
return tr2_cfg_count_patterns;
tr2_cfg_loaded = 1;
- envvar = getenv(TR2_ENVVAR_CFG_PARAM);
+ envvar = tr2_sysenv_get(TR2_SYSENV_CFG_PARAM);
if (!envvar || !*envvar)
return tr2_cfg_count_patterns;
diff --git a/trace2/tr2_dst.c b/trace2/tr2_dst.c
index fd490a43ad..575cd69aa9 100644
--- a/trace2/tr2_dst.c
+++ b/trace2/tr2_dst.c
@@ -1,5 +1,6 @@
#include "cache.h"
#include "trace2/tr2_dst.h"
+#include "trace2/tr2_sysenv.h"
/*
* If a Trace2 target cannot be opened for writing, we should issue a
@@ -7,17 +8,13 @@
* or socket and beyond the user's control -- especially since every
* git command (and sub-command) will print the message. So we silently
* eat these warnings and just discard the trace data.
- *
- * Enable the following environment variable to see these warnings.
*/
-#define TR2_ENVVAR_DST_DEBUG "GIT_TR2_DST_DEBUG"
-
static int tr2_dst_want_warning(void)
{
static int tr2env_dst_debug = -1;
if (tr2env_dst_debug == -1) {
- const char *env_value = getenv(TR2_ENVVAR_DST_DEBUG);
+ const char *env_value = tr2_sysenv_get(TR2_SYSENV_DST_DEBUG);
if (!env_value || !*env_value)
tr2env_dst_debug = 0;
else
@@ -42,7 +39,9 @@ static int tr2_dst_try_path(struct tr2_dst *dst, const char *tgt_value)
if (fd == -1) {
if (tr2_dst_want_warning())
warning("trace2: could not open '%s' for '%s' tracing: %s",
- tgt_value, dst->env_var_name, strerror(errno));
+ tgt_value,
+ tr2_sysenv_display_name(dst->sysenv_var),
+ strerror(errno));
tr2_dst_trace_disable(dst);
return 0;
@@ -116,7 +115,7 @@ static int tr2_dst_try_unix_domain_socket(struct tr2_dst *dst,
if (!path || !*path) {
if (tr2_dst_want_warning())
warning("trace2: invalid AF_UNIX value '%s' for '%s' tracing",
- tgt_value, dst->env_var_name);
+ tgt_value, tr2_sysenv_display_name(dst->sysenv_var));
tr2_dst_trace_disable(dst);
return 0;
@@ -126,7 +125,7 @@ static int tr2_dst_try_unix_domain_socket(struct tr2_dst *dst,
strlen(path) >= sizeof(((struct sockaddr_un *)0)->sun_path)) {
if (tr2_dst_want_warning())
warning("trace2: invalid AF_UNIX path '%s' for '%s' tracing",
- path, dst->env_var_name);
+ path, tr2_sysenv_display_name(dst->sysenv_var));
tr2_dst_trace_disable(dst);
return 0;
@@ -148,7 +147,7 @@ static int tr2_dst_try_unix_domain_socket(struct tr2_dst *dst,
error:
if (tr2_dst_want_warning())
warning("trace2: could not connect to socket '%s' for '%s' tracing: %s",
- path, dst->env_var_name, strerror(e));
+ path, tr2_sysenv_display_name(dst->sysenv_var), strerror(e));
tr2_dst_trace_disable(dst);
return 0;
@@ -168,7 +167,7 @@ static void tr2_dst_malformed_warning(struct tr2_dst *dst,
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf, "trace2: unknown value for '%s': '%s'",
- dst->env_var_name, tgt_value);
+ tr2_sysenv_display_name(dst->sysenv_var), tgt_value);
warning("%s", buf.buf);
strbuf_release(&buf);
@@ -184,7 +183,7 @@ int tr2_dst_get_trace_fd(struct tr2_dst *dst)
dst->initialized = 1;
- tgt_value = getenv(dst->env_var_name);
+ tgt_value = tr2_sysenv_get(dst->sysenv_var);
if (!tgt_value || !strcmp(tgt_value, "") || !strcmp(tgt_value, "0") ||
!strcasecmp(tgt_value, "false")) {
@@ -246,7 +245,8 @@ void tr2_dst_write_line(struct tr2_dst *dst, struct strbuf *buf_line)
return;
if (tr2_dst_want_warning())
- warning("unable to write trace to '%s': %s", dst->env_var_name,
+ warning("unable to write trace to '%s': %s",
+ tr2_sysenv_display_name(dst->sysenv_var),
strerror(errno));
tr2_dst_trace_disable(dst);
}
diff --git a/trace2/tr2_dst.h b/trace2/tr2_dst.h
index 9a64f05b02..3adf3bac13 100644
--- a/trace2/tr2_dst.h
+++ b/trace2/tr2_dst.h
@@ -2,9 +2,10 @@
#define TR2_DST_H
struct strbuf;
+#include "trace2/tr2_sysenv.h"
struct tr2_dst {
- const char *const env_var_name;
+ enum tr2_sysenv_variable sysenv_var;
int fd;
unsigned int initialized : 1;
unsigned int need_close : 1;
diff --git a/trace2/tr2_sysenv.c b/trace2/tr2_sysenv.c
new file mode 100644
index 0000000000..9025b86303
--- /dev/null
+++ b/trace2/tr2_sysenv.c
@@ -0,0 +1,127 @@
+#include "cache.h"
+#include "config.h"
+#include "dir.h"
+#include "tr2_sysenv.h"
+
+/*
+ * Each entry represents a trace2 setting.
+ * See Documentation/technical/api-trace2.txt
+ */
+struct tr2_sysenv_entry {
+ const char *env_var_name;
+ const char *git_config_name;
+
+ char *value;
+ unsigned int getenv_called : 1;
+};
+
+/*
+ * This table must match "enum tr2_sysenv_variable" in tr2_sysenv.h.
+ *
+ * The strings in this table are constant and must match the published
+ * config and environment variable names as described in the documentation.
+ *
+ * We do not define entries for the GIT_TR2_PARENT_* environment
+ * variables because they are transient and used to pass information
+ * from parent to child git processes, rather than settings.
+ */
+/* clang-format off */
+static struct tr2_sysenv_entry tr2_sysenv_settings[] = {
+ [TR2_SYSENV_CFG_PARAM] = { "GIT_TR2_CONFIG_PARAMS",
+ "trace2.configparams" },
+
+ [TR2_SYSENV_DST_DEBUG] = { "GIT_TR2_DST_DEBUG",
+ "trace2.destinationdebug" },
+
+ [TR2_SYSENV_NORMAL] = { "GIT_TR2",
+ "trace2.normaltarget" },
+ [TR2_SYSENV_NORMAL_BRIEF] = { "GIT_TR2_BRIEF",
+ "trace2.normalbrief" },
+
+ [TR2_SYSENV_EVENT] = { "GIT_TR2_EVENT",
+ "trace2.eventtarget" },
+ [TR2_SYSENV_EVENT_BRIEF] = { "GIT_TR2_EVENT_BRIEF",
+ "trace2.eventbrief" },
+ [TR2_SYSENV_EVENT_NESTING] = { "GIT_TR2_EVENT_NESTING",
+ "trace2.eventnesting" },
+
+ [TR2_SYSENV_PERF] = { "GIT_TR2_PERF",
+ "trace2.perftarget" },
+ [TR2_SYSENV_PERF_BRIEF] = { "GIT_TR2_PERF_BRIEF",
+ "trace2.perfbrief" },
+};
+/* clang-format on */
+
+static int tr2_sysenv_cb(const char *key, const char *value, void *d)
+{
+ int k;
+
+ if (!starts_with(key, "trace2."))
+ return 0;
+
+ for (k = 0; k < ARRAY_SIZE(tr2_sysenv_settings); k++) {
+ if (!strcmp(key, tr2_sysenv_settings[k].git_config_name)) {
+ free(tr2_sysenv_settings[k].value);
+ tr2_sysenv_settings[k].value = xstrdup(value);
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Load Trace2 settings from the system config (usually "/etc/gitconfig"
+ * unless we were built with a runtime-prefix). These are intended to
+ * define the default values for Trace2 as requested by the administrator.
+ *
+ * Then override with the Trace2 settings from the global config.
+ */
+void tr2_sysenv_load(void)
+{
+ if (ARRAY_SIZE(tr2_sysenv_settings) != TR2_SYSENV_MUST_BE_LAST)
+ BUG("tr2_sysenv_settings size is wrong");
+
+ read_very_early_config(tr2_sysenv_cb, NULL);
+}
+
+/*
+ * Return the value for the requested Trace2 setting from these sources:
+ * the system config, the global config, and the environment.
+ */
+const char *tr2_sysenv_get(enum tr2_sysenv_variable var)
+{
+ if (var >= TR2_SYSENV_MUST_BE_LAST)
+ BUG("tr2_sysenv_get invalid var '%d'", var);
+
+ if (!tr2_sysenv_settings[var].getenv_called) {
+ const char *v = getenv(tr2_sysenv_settings[var].env_var_name);
+ if (v && *v) {
+ free(tr2_sysenv_settings[var].value);
+ tr2_sysenv_settings[var].value = xstrdup(v);
+ }
+ tr2_sysenv_settings[var].getenv_called = 1;
+ }
+
+ return tr2_sysenv_settings[var].value;
+}
+
+/*
+ * Return a friendly name for this setting that is suitable for printing
+ * in an error messages.
+ */
+const char *tr2_sysenv_display_name(enum tr2_sysenv_variable var)
+{
+ if (var >= TR2_SYSENV_MUST_BE_LAST)
+ BUG("tr2_sysenv_get invalid var '%d'", var);
+
+ return tr2_sysenv_settings[var].env_var_name;
+}
+
+void tr2_sysenv_release(void)
+{
+ int k;
+
+ for (k = 0; k < ARRAY_SIZE(tr2_sysenv_settings); k++)
+ free(tr2_sysenv_settings[k].value);
+}
diff --git a/trace2/tr2_sysenv.h b/trace2/tr2_sysenv.h
new file mode 100644
index 0000000000..369b20bd87
--- /dev/null
+++ b/trace2/tr2_sysenv.h
@@ -0,0 +1,36 @@
+#ifndef TR2_SYSENV_H
+#define TR2_SYSENV_H
+
+/*
+ * The Trace2 settings that can be loaded from /etc/gitconfig
+ * and/or user environment variables.
+ *
+ * Note that this set does not contain any of the transient
+ * environment variables used to pass information from parent
+ * to child git processes, such "GIT_TR2_PARENT_SID".
+ */
+enum tr2_sysenv_variable {
+ TR2_SYSENV_CFG_PARAM = 0,
+
+ TR2_SYSENV_DST_DEBUG,
+
+ TR2_SYSENV_NORMAL,
+ TR2_SYSENV_NORMAL_BRIEF,
+
+ TR2_SYSENV_EVENT,
+ TR2_SYSENV_EVENT_BRIEF,
+ TR2_SYSENV_EVENT_NESTING,
+
+ TR2_SYSENV_PERF,
+ TR2_SYSENV_PERF_BRIEF,
+
+ TR2_SYSENV_MUST_BE_LAST
+};
+
+void tr2_sysenv_load(void);
+
+const char *tr2_sysenv_get(enum tr2_sysenv_variable);
+const char *tr2_sysenv_display_name(enum tr2_sysenv_variable var);
+void tr2_sysenv_release(void);
+
+#endif /* TR2_SYSENV_H */
diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
index 89a4d3ae9a..48d9193b2c 100644
--- a/trace2/tr2_tgt_event.c
+++ b/trace2/tr2_tgt_event.c
@@ -6,10 +6,11 @@
#include "trace2/tr2_dst.h"
#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_sid.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
-static struct tr2_dst tr2dst_event = { "GIT_TR2_EVENT", 0, 0, 0 };
+static struct tr2_dst tr2dst_event = { TR2_SYSENV_EVENT, 0, 0, 0 };
/*
* The version number of the JSON data generated by the EVENT target
@@ -28,37 +29,36 @@ static struct tr2_dst tr2dst_event = { "GIT_TR2_EVENT", 0, 0, 0 };
* are primarily intended for the performance target during debugging.
*
* Some of the outer-most messages, however, may be of interest to the
- * event target. Set this environment variable to a larger integer for
- * more detail in the event target.
+ * event target. Use the TR2_SYSENV_EVENT_NESTING setting to increase
+ * region details in the event target.
*/
-#define TR2_ENVVAR_EVENT_NESTING "GIT_TR2_EVENT_NESTING"
-static int tr2env_event_nesting_wanted = 2;
+static int tr2env_event_max_nesting_levels = 2;
/*
- * Set this environment variable to true to omit the <time>, <file>, and
+ * Use the TR2_SYSENV_EVENT_BRIEF to omit the <time>, <file>, and
* <line> fields from most events.
*/
-#define TR2_ENVVAR_EVENT_BRIEF "GIT_TR2_EVENT_BRIEF"
-static int tr2env_event_brief;
+static int tr2env_event_be_brief;
static int fn_init(void)
{
int want = tr2_dst_trace_want(&tr2dst_event);
- int want_nesting;
+ int max_nesting;
int want_brief;
- char *nesting;
- char *brief;
+ const char *nesting;
+ const char *brief;
if (!want)
return want;
- nesting = getenv(TR2_ENVVAR_EVENT_NESTING);
- if (nesting && ((want_nesting = atoi(nesting)) > 0))
- tr2env_event_nesting_wanted = want_nesting;
+ nesting = tr2_sysenv_get(TR2_SYSENV_EVENT_NESTING);
+ if (nesting && *nesting && ((max_nesting = atoi(nesting)) > 0))
+ tr2env_event_max_nesting_levels = max_nesting;
- brief = getenv(TR2_ENVVAR_EVENT_BRIEF);
- if (brief && ((want_brief = atoi(brief)) > 0))
- tr2env_event_brief = want_brief;
+ brief = tr2_sysenv_get(TR2_SYSENV_EVENT_BRIEF);
+ if (brief && *brief &&
+ ((want_brief = git_parse_maybe_bool(brief)) != -1))
+ tr2env_event_be_brief = want_brief;
return want;
}
@@ -92,13 +92,13 @@ static void event_fmt_prepare(const char *event_name, const char *file,
/*
* In brief mode, only emit <time> on these 2 event types.
*/
- if (!tr2env_event_brief || !strcmp(event_name, "version") ||
+ if (!tr2env_event_be_brief || !strcmp(event_name, "version") ||
!strcmp(event_name, "atexit")) {
tr2_tbuf_utc_time(&tb_now);
jw_object_string(jw, "time", tb_now.buf);
}
- if (!tr2env_event_brief && file && *file) {
+ if (!tr2env_event_be_brief && file && *file) {
jw_object_string(jw, "file", file);
jw_object_intmax(jw, "line", line);
}
@@ -459,7 +459,7 @@ static void fn_region_enter_printf_va_fl(const char *file, int line,
{
const char *event_name = "region_enter";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
jw_object_begin(&jw, 0);
@@ -484,7 +484,7 @@ static void fn_region_leave_printf_va_fl(
{
const char *event_name = "region_leave";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
double t_rel = (double)us_elapsed_region / 1000000.0;
@@ -511,7 +511,7 @@ static void fn_data_fl(const char *file, int line, uint64_t us_elapsed_absolute,
{
const char *event_name = "data";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
double t_abs = (double)us_elapsed_absolute / 1000000.0;
double t_rel = (double)us_elapsed_region / 1000000.0;
@@ -539,7 +539,7 @@ static void fn_data_json_fl(const char *file, int line,
{
const char *event_name = "data_json";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
double t_abs = (double)us_elapsed_absolute / 1000000.0;
double t_rel = (double)us_elapsed_region / 1000000.0;
diff --git a/trace2/tr2_tgt_normal.c b/trace2/tr2_tgt_normal.c
index 57f3e18f5b..1ce6f97863 100644
--- a/trace2/tr2_tgt_normal.c
+++ b/trace2/tr2_tgt_normal.c
@@ -4,20 +4,20 @@
#include "quote.h"
#include "version.h"
#include "trace2/tr2_dst.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
-static struct tr2_dst tr2dst_normal = { "GIT_TR2", 0, 0, 0 };
+static struct tr2_dst tr2dst_normal = { TR2_SYSENV_NORMAL, 0, 0, 0 };
/*
- * Set this environment variable to true to omit the "<time> <file>:<line>"
+ * Use the TR2_SYSENV_NORMAL_BRIEF setting to omit the "<time> <file>:<line>"
* fields from each line written to the builtin normal target.
*
* Unit tests may want to use this to help with testing.
*/
-#define TR2_ENVVAR_NORMAL_BRIEF "GIT_TR2_BRIEF"
-static int tr2env_normal_brief;
+static int tr2env_normal_be_brief;
#define TR2FMT_NORMAL_FL_WIDTH (50)
@@ -25,15 +25,15 @@ static int fn_init(void)
{
int want = tr2_dst_trace_want(&tr2dst_normal);
int want_brief;
- char *brief;
+ const char *brief;
if (!want)
return want;
- brief = getenv(TR2_ENVVAR_NORMAL_BRIEF);
+ brief = tr2_sysenv_get(TR2_SYSENV_NORMAL_BRIEF);
if (brief && *brief &&
((want_brief = git_parse_maybe_bool(brief)) != -1))
- tr2env_normal_brief = want_brief;
+ tr2env_normal_be_brief = want_brief;
return want;
}
@@ -47,7 +47,7 @@ static void normal_fmt_prepare(const char *file, int line, struct strbuf *buf)
{
strbuf_setlen(buf, 0);
- if (!tr2env_normal_brief) {
+ if (!tr2env_normal_be_brief) {
struct tr2_tbuf tb_now;
tr2_tbuf_local_time(&tb_now);
diff --git a/trace2/tr2_tgt_perf.c b/trace2/tr2_tgt_perf.c
index 9c3b4d8a0f..328d2234bd 100644
--- a/trace2/tr2_tgt_perf.c
+++ b/trace2/tr2_tgt_perf.c
@@ -6,20 +6,20 @@
#include "json-writer.h"
#include "trace2/tr2_dst.h"
#include "trace2/tr2_sid.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
-static struct tr2_dst tr2dst_perf = { "GIT_TR2_PERF", 0, 0, 0 };
+static struct tr2_dst tr2dst_perf = { TR2_SYSENV_PERF, 0, 0, 0 };
/*
- * Set this environment variable to true to omit the "<time> <file>:<line>"
+ * Use TR2_SYSENV_PERF_BRIEF to omit the "<time> <file>:<line>"
* fields from each line written to the builtin performance target.
*
* Unit tests may want to use this to help with testing.
*/
-#define TR2_ENVVAR_PERF_BRIEF "GIT_TR2_PERF_BRIEF"
-static int tr2env_perf_brief;
+static int tr2env_perf_be_brief;
#define TR2FMT_PERF_FL_WIDTH (50)
#define TR2FMT_PERF_MAX_EVENT_NAME (12)
@@ -36,17 +36,17 @@ static int fn_init(void)
{
int want = tr2_dst_trace_want(&tr2dst_perf);
int want_brief;
- char *brief;
+ const char *brief;
if (!want)
return want;
strbuf_addchars(&dots, '.', TR2_DOTS_BUFFER_SIZE);
- brief = getenv(TR2_ENVVAR_PERF_BRIEF);
+ brief = tr2_sysenv_get(TR2_SYSENV_PERF_BRIEF);
if (brief && *brief &&
((want_brief = git_parse_maybe_bool(brief)) != -1))
- tr2env_perf_brief = want_brief;
+ tr2env_perf_be_brief = want_brief;
return want;
}
@@ -77,7 +77,7 @@ static void perf_fmt_prepare(const char *event_name,
strbuf_setlen(buf, 0);
- if (!tr2env_perf_brief) {
+ if (!tr2env_perf_be_brief) {
struct tr2_tbuf tb_now;
tr2_tbuf_local_time(&tb_now);
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v3 07/10] trace2: report peak memory usage of the process
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
` (5 preceding siblings ...)
2019-04-11 15:18 ` [PATCH v3 06/10] trace2: use system/global config for default trace2 settings Jeff Hostetler via GitGitGadget
@ 2019-04-11 15:18 ` Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 08/10] trace2: clarify UTC datetime formatting Jeff Hostetler via GitGitGadget
` (4 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-11 15:18 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Teach Windows version of git to report peak memory usage
during exit() processing.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
common-main.c | 2 +-
compat/win32/trace2_win32_process_info.c | 50 ++++++++++++++++++++++--
trace2.c | 2 +
trace2.h | 14 +++++--
4 files changed, 60 insertions(+), 8 deletions(-)
diff --git a/common-main.c b/common-main.c
index 299ca62a72..582a7b1886 100644
--- a/common-main.c
+++ b/common-main.c
@@ -41,7 +41,7 @@ int main(int argc, const char **argv)
trace2_initialize();
trace2_cmd_start(argv);
- trace2_collect_process_info();
+ trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP);
git_setup_gettext();
diff --git a/compat/win32/trace2_win32_process_info.c b/compat/win32/trace2_win32_process_info.c
index 52bd62034b..2a514caed9 100644
--- a/compat/win32/trace2_win32_process_info.c
+++ b/compat/win32/trace2_win32_process_info.c
@@ -1,5 +1,6 @@
#include "../../cache.h"
#include "../../json-writer.h"
+#include "lazyload.h"
#include <Psapi.h>
#include <tlHelp32.h>
@@ -137,11 +138,54 @@ static void get_is_being_debugged(void)
"windows/debugger_present", 1);
}
-void trace2_collect_process_info(void)
+/*
+ * Emit JSON data with the peak memory usage of the current process.
+ */
+static void get_peak_memory_info(void)
+{
+ DECLARE_PROC_ADDR(psapi.dll, BOOL, GetProcessMemoryInfo,
+ HANDLE, PPROCESS_MEMORY_COUNTERS, DWORD);
+
+ if (INIT_PROC_ADDR(GetProcessMemoryInfo)) {
+ PROCESS_MEMORY_COUNTERS pmc;
+
+ if (GetProcessMemoryInfo(GetCurrentProcess(), &pmc,
+ sizeof(pmc))) {
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+
+#define KV(kv) #kv, (intmax_t)pmc.kv
+
+ jw_object_intmax(&jw, KV(PageFaultCount));
+ jw_object_intmax(&jw, KV(PeakWorkingSetSize));
+ jw_object_intmax(&jw, KV(PeakPagefileUsage));
+
+ jw_end(&jw);
+
+ trace2_data_json("process", the_repository,
+ "windows/memory", &jw);
+ jw_release(&jw);
+ }
+ }
+}
+
+void trace2_collect_process_info(enum trace2_process_info_reason reason)
{
if (!trace2_is_enabled())
return;
- get_is_being_debugged();
- get_ancestry();
+ switch (reason) {
+ case TRACE2_PROCESS_INFO_STARTUP:
+ get_is_being_debugged();
+ get_ancestry();
+ return;
+
+ case TRACE2_PROCESS_INFO_EXIT:
+ get_peak_memory_info();
+ return;
+
+ default:
+ BUG("trace2_collect_process_info: unknown reason '%d'", reason);
+ }
}
diff --git a/trace2.c b/trace2.c
index 490b3f071e..6baa65cdf9 100644
--- a/trace2.c
+++ b/trace2.c
@@ -213,6 +213,8 @@ int trace2_cmd_exit_fl(const char *file, int line, int code)
if (!trace2_enabled)
return code;
+ trace2_collect_process_info(TRACE2_PROCESS_INFO_EXIT);
+
tr2main_exit_code = code;
us_now = getnanotime() / 1000;
diff --git a/trace2.h b/trace2.h
index 894bfca7e0..888531eb08 100644
--- a/trace2.h
+++ b/trace2.h
@@ -391,13 +391,19 @@ void trace2_printf(const char *fmt, ...);
* Optional platform-specific code to dump information about the
* current and any parent process(es). This is intended to allow
* post-processors to know who spawned this git instance and anything
- * else the platform may be able to tell us about the current process.
+ * else that the platform may be able to tell us about the current process.
*/
+
+enum trace2_process_info_reason {
+ TRACE2_PROCESS_INFO_STARTUP,
+ TRACE2_PROCESS_INFO_EXIT,
+};
+
#if defined(GIT_WINDOWS_NATIVE)
-void trace2_collect_process_info(void);
+void trace2_collect_process_info(enum trace2_process_info_reason reason);
#else
-#define trace2_collect_process_info() \
- do { \
+#define trace2_collect_process_info(reason) \
+ do { \
} while (0)
#endif
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v3 08/10] trace2: clarify UTC datetime formatting
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
` (6 preceding siblings ...)
2019-04-11 15:18 ` [PATCH v3 07/10] trace2: report peak memory usage of the process Jeff Hostetler via GitGitGadget
@ 2019-04-11 15:18 ` Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 09/10] trace2: make SIDs more unique Jeff Hostetler via GitGitGadget
` (3 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-11 15:18 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Update tr2_tbuf_utc_datetime to generate extended UTC format.
Update tr2_tgt_event target to use extended format in 'time' columns.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 12 ++++++------
trace2/tr2_tbuf.c | 4 ++--
trace2/tr2_tbuf.h | 4 ++--
trace2/tr2_tgt_event.c | 2 +-
4 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index baaa1153bb..cdc00bcc5d 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -78,11 +78,11 @@ git version 2.20.1.155.g426c96fcdb
+
------------
$ cat ~/log.event
-{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.620713","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621027","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
-{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621122","file":"git.c","line":432,"name":"version","hierarchy":"version"}
-{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621236","file":"git.c","line":662,"t_abs":0.001227,"code":0}
-{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621268","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
+{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
+{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
+{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
+{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
+{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
------------
== Enabling a Target
@@ -542,7 +542,7 @@ The following key/value pairs are common to all events:
"event":"version",
"sid":"1547659722619736-11614",
"thread":"main",
- "time":"2019-01-16 17:28:42.620713",
+ "time":"2019-01-16T17:28:42.620713Z",
"file":"common-main.c",
"line":38,
...
diff --git a/trace2/tr2_tbuf.c b/trace2/tr2_tbuf.c
index 0844910423..eb1b240d8a 100644
--- a/trace2/tr2_tbuf.c
+++ b/trace2/tr2_tbuf.c
@@ -15,7 +15,7 @@ void tr2_tbuf_local_time(struct tr2_tbuf *tb)
tm.tm_min, tm.tm_sec, (long)tv.tv_usec);
}
-void tr2_tbuf_utc_time(struct tr2_tbuf *tb)
+void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb)
{
struct timeval tv;
struct tm tm;
@@ -26,7 +26,7 @@ void tr2_tbuf_utc_time(struct tr2_tbuf *tb)
gmtime_r(&secs, &tm);
xsnprintf(tb->buf, sizeof(tb->buf),
- "%4d-%02d-%02d %02d:%02d:%02d.%06ld", tm.tm_year + 1900,
+ "%4d-%02d-%02dT%02d:%02d:%02d.%06ldZ", tm.tm_year + 1900,
tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec,
(long)tv.tv_usec);
}
diff --git a/trace2/tr2_tbuf.h b/trace2/tr2_tbuf.h
index 9cdefa3957..2a1d173ff2 100644
--- a/trace2/tr2_tbuf.h
+++ b/trace2/tr2_tbuf.h
@@ -16,8 +16,8 @@ struct tr2_tbuf {
void tr2_tbuf_local_time(struct tr2_tbuf *tb);
/*
- * Fill buffer with formatted UTC time string.
+ * Fill buffer with formatted UTC datatime string.
*/
-void tr2_tbuf_utc_time(struct tr2_tbuf *tb);
+void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb);
#endif /* TR2_TBUF_H */
diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
index 48d9193b2c..2c97cf54be 100644
--- a/trace2/tr2_tgt_event.c
+++ b/trace2/tr2_tgt_event.c
@@ -94,7 +94,7 @@ static void event_fmt_prepare(const char *event_name, const char *file,
*/
if (!tr2env_event_be_brief || !strcmp(event_name, "version") ||
!strcmp(event_name, "atexit")) {
- tr2_tbuf_utc_time(&tb_now);
+ tr2_tbuf_utc_datetime_extended(&tb_now);
jw_object_string(jw, "time", tb_now.buf);
}
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v3 09/10] trace2: make SIDs more unique
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
` (7 preceding siblings ...)
2019-04-11 15:18 ` [PATCH v3 08/10] trace2: clarify UTC datetime formatting Jeff Hostetler via GitGitGadget
@ 2019-04-11 15:18 ` Jeff Hostetler via GitGitGadget
2019-04-11 15:18 ` [PATCH v3 10/10] trace2: update docs to describe system/global config settings Jeff Hostetler via GitGitGadget
` (2 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-11 15:18 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Update SID component construction to use the current UTC datetime
and a portion of the SHA1 of the hostname.
Use an simplified date/time format to make it easier to use the
SID component as a logfile filename.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 16 ++++----
trace2/tr2_sid.c | 55 ++++++++++++++++++++++++--
trace2/tr2_tbuf.c | 16 ++++++++
trace2/tr2_tbuf.h | 1 +
4 files changed, 76 insertions(+), 12 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index cdc00bcc5d..43adbf00eb 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -78,11 +78,11 @@ git version 2.20.1.155.g426c96fcdb
+
------------
$ cat ~/log.event
-{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
-{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
-{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
-{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
+{"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
+{"event":"start","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
+{"event":"cmd_name","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
+{"event":"exit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
+{"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
------------
== Enabling a Target
@@ -540,11 +540,11 @@ The following key/value pairs are common to all events:
------------
{
"event":"version",
- "sid":"1547659722619736-11614",
+ "sid":"20190408T191827.272759Z-H9b68c35f-P011764",
"thread":"main",
- "time":"2019-01-16T17:28:42.620713Z",
+ "time":"2019-04-08T19:18:27.282761Z",
"file":"common-main.c",
- "line":38,
+ "line":42,
...
}
------------
diff --git a/trace2/tr2_sid.c b/trace2/tr2_sid.c
index 984524a43c..68d723bc6c 100644
--- a/trace2/tr2_sid.c
+++ b/trace2/tr2_sid.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_sid.h"
#define TR2_ENVVAR_PARENT_SID "GIT_TR2_PARENT_SID"
@@ -6,6 +7,55 @@
static struct strbuf tr2sid_buf = STRBUF_INIT;
static int tr2sid_nr_git_parents;
+/*
+ * Compute the final component of the SID representing the current process.
+ * This should uniquely identify the process and be a valid filename (to
+ * allow writing trace2 data to per-process files). It should also be fixed
+ * possible length for use as a database key.
+ *
+ * "<yyyymmdd>T<hhmmss>.<fraction>Z-<host>-<process>"
+ *
+ * where <host> is a 9 character string:
+ * "H<first_8_chars_of_sha1_of_hostname>"
+ * "Localhost" when no hostname.
+ *
+ * where <process> is a possibly wrapped PID:
+ * "P<6-digit-pid>"
+ * "W<wrapped-6-digit-pid>" when PID too big.
+ *
+ */
+static void tr2_sid_append_my_sid_component(void)
+{
+ const struct git_hash_algo *algo = &hash_algos[GIT_HASH_SHA1];
+ struct tr2_tbuf tb_now;
+ git_hash_ctx ctx;
+ uintmax_t pid = getpid();
+ unsigned char hash[GIT_MAX_RAWSZ + 1];
+ char hex[GIT_MAX_HEXSZ + 1];
+ char hostname[HOST_NAME_MAX + 1];
+
+ tr2_tbuf_utc_datetime(&tb_now);
+ strbuf_addstr(&tr2sid_buf, tb_now.buf);
+
+ strbuf_addch(&tr2sid_buf, '-');
+ if (xgethostname(hostname, sizeof(hostname)))
+ strbuf_add(&tr2sid_buf, "Localhost", 9);
+ else {
+ algo->init_fn(&ctx);
+ algo->update_fn(&ctx, hostname, strlen(hostname));
+ algo->final_fn(hash, &ctx);
+ hash_to_hex_algop_r(hex, hash, algo);
+ strbuf_addch(&tr2sid_buf, 'H');
+ strbuf_add(&tr2sid_buf, hex, 8);
+ }
+
+ strbuf_addch(&tr2sid_buf, '-');
+ if (pid > 999999)
+ strbuf_addf(&tr2sid_buf, "W%06d", (int)(pid % 1000000));
+ else
+ strbuf_addf(&tr2sid_buf, "P%06d", (int)pid);
+}
+
/*
* Compute a "unique" session id (SID) for the current process. This allows
* all events from this process to have a single label (much like a PID).
@@ -20,7 +70,6 @@ static int tr2sid_nr_git_parents;
*/
static void tr2_sid_compute(void)
{
- uint64_t us_now;
const char *parent_sid;
if (tr2sid_buf.len)
@@ -38,9 +87,7 @@ static void tr2_sid_compute(void)
tr2sid_nr_git_parents++;
}
- us_now = getnanotime() / 1000;
- strbuf_addf(&tr2sid_buf, "%" PRIuMAX "-%" PRIdMAX, (uintmax_t)us_now,
- (intmax_t)getpid());
+ tr2_sid_append_my_sid_component();
setenv(TR2_ENVVAR_PARENT_SID, tr2sid_buf.buf, 1);
}
diff --git a/trace2/tr2_tbuf.c b/trace2/tr2_tbuf.c
index eb1b240d8a..c8a19ac341 100644
--- a/trace2/tr2_tbuf.c
+++ b/trace2/tr2_tbuf.c
@@ -30,3 +30,19 @@ void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb)
tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec,
(long)tv.tv_usec);
}
+
+void tr2_tbuf_utc_datetime(struct tr2_tbuf *tb)
+{
+ struct timeval tv;
+ struct tm tm;
+ time_t secs;
+
+ gettimeofday(&tv, NULL);
+ secs = tv.tv_sec;
+ gmtime_r(&secs, &tm);
+
+ xsnprintf(tb->buf, sizeof(tb->buf),
+ "%4d%02d%02dT%02d%02d%02d.%06ldZ", tm.tm_year + 1900,
+ tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec,
+ (long)tv.tv_usec);
+}
diff --git a/trace2/tr2_tbuf.h b/trace2/tr2_tbuf.h
index 2a1d173ff2..fa853d8f42 100644
--- a/trace2/tr2_tbuf.h
+++ b/trace2/tr2_tbuf.h
@@ -19,5 +19,6 @@ void tr2_tbuf_local_time(struct tr2_tbuf *tb);
* Fill buffer with formatted UTC datatime string.
*/
void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb);
+void tr2_tbuf_utc_datetime(struct tr2_tbuf *tb);
#endif /* TR2_TBUF_H */
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v3 10/10] trace2: update docs to describe system/global config settings
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
` (8 preceding siblings ...)
2019-04-11 15:18 ` [PATCH v3 09/10] trace2: make SIDs more unique Jeff Hostetler via GitGitGadget
@ 2019-04-11 15:18 ` Jeff Hostetler via GitGitGadget
2019-04-12 2:29 ` [PATCH v3 00/10] trace2: load trace2 settings from system config Junio C Hamano
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-11 15:18 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/config.txt | 2 +
Documentation/config/trace2.txt | 56 ++++++++++
Documentation/technical/api-trace2.txt | 141 ++++++++++++++-----------
Documentation/trace2-target-values.txt | 10 ++
4 files changed, 147 insertions(+), 62 deletions(-)
create mode 100644 Documentation/config/trace2.txt
create mode 100644 Documentation/trace2-target-values.txt
diff --git a/Documentation/config.txt b/Documentation/config.txt
index d87846faa6..7e2a6f61f5 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -422,6 +422,8 @@ include::config/submodule.txt[]
include::config/tag.txt[]
+include::config/trace2.txt[]
+
include::config/transfer.txt[]
include::config/uploadarchive.txt[]
diff --git a/Documentation/config/trace2.txt b/Documentation/config/trace2.txt
new file mode 100644
index 0000000000..a5f409c1c1
--- /dev/null
+++ b/Documentation/config/trace2.txt
@@ -0,0 +1,56 @@
+Trace2 config settings are only read from the system and global
+config files; repository local and worktree config files and `-c`
+command line arguments are not respected.
+
+trace2.normalTarget::
+ This variable controls the normal target destination.
+ It may be overridden by the `GIT_TR2` environment variable.
+ The following table shows possible values.
+
+trace2.perfTarget::
+ This variable controls the performance target destination.
+ It may be overridden by the `GIT_TR2_PERF` environment variable.
+ The following table shows possible values.
+
+trace2.eventTarget::
+ This variable controls the event target destination.
+ It may be overridden by the `GIT_TR2_EVENT` environment variable.
+ The following table shows possible values.
++
+include::../trace2-target-values.txt[]
+
+trace2.normalBrief::
+ Boolean. When true `time`, `filename`, and `line` fields are
+ omitted from normal output. May be overridden by the
+ `GIT_TR2_BRIEF` environment variable. Defaults to false.
+
+trace2.perfBrief::
+ Boolean. When true `time`, `filename`, and `line` fields are
+ omitted from PERF output. May be overridden by the
+ `GIT_TR2_PERF_BRIEF` environment variable. Defaults to false.
+
+trace2.eventBrief::
+ Boolean. When true `time`, `filename`, and `line` fields are
+ omitted from event output. May be overridden by the
+ `GIT_TR2_EVENT_BRIEF` environment variable. Defaults to false.
+
+trace2.eventNesting::
+ Integer. Specifies desired depth of nested regions in the
+ event output. Regions deeper than this value will be
+ omitted. May be overridden by the `GIT_TR2_EVENT_NESTING`
+ environment variable. Defaults to 2.
+
+trace2.configParams::
+ A comma-separated list of patterns of "important" config
+ settings that should be recorded in the trace2 output.
+ For example, `core.*,remote.*.url` would cause the trace2
+ output to contain events listing each configured remote.
+ May be overridden by the `GIT_TR2_CONFIG_PARAMS` environment
+ variable. Unset by default.
+
+trace2.destinationDebug::
+ Boolean. When true Git will print error messages when a
+ trace target destination cannot be opened for writing.
+ By default, these errors are suppressed and tracing is
+ silently disabled. May be overridden by the
+ `GIT_TR2_DST_DEBUG` environment variable.
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index 43adbf00eb..e8eee25226 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -22,21 +22,41 @@ Targets are defined using a VTable allowing easy extension to other
formats in the future. This might be used to define a binary format,
for example.
+Trace2 is controlled using `trace2.*` config values in the system and
+global config files and `GIT_TR2*` environment variables. Trace2 does
+not read from repo local or worktree config files or respect `-c`
+command line config settings.
+
== Trace2 Targets
Trace2 defines the following set of Trace2 Targets.
Format details are given in a later section.
-`GIT_TR2` (NORMAL)::
+=== The Normal Format Target
+
+The normal format target is a tradition printf format and similar
+to GIT_TRACE format. This format is enabled with the `GIT_TR`
+environment variable or the `trace2.normalTarget` system or global
+config setting.
+
+For example
- a simple printf format like GIT_TRACE.
-+
------------
$ export GIT_TR2=~/log.normal
$ git version
git version 2.20.1.155.g426c96fcdb
------------
-+
+
+or
+
+------------
+$ git config --global trace2.normalTarget ~/log.normal
+$ git version
+git version 2.20.1.155.g426c96fcdb
+------------
+
+yields
+
------------
$ cat ~/log.normal
12:28:42.620009 common-main.c:38 version 2.20.1.155.g426c96fcdb
@@ -46,17 +66,32 @@ $ cat ~/log.normal
12:28:42.621250 trace2/tr2_tgt_normal.c:124 atexit elapsed:0.001265 code:0
------------
-`GIT_TR2_PERF` (PERF)::
+=== The Performance Format Target
+
+The performance format target (PERF) is a column-based format to
+replace GIT_TRACE_PERFORMANCE and is suitable for development and
+testing, possibly to complement tools like gprof. This format is
+enabled with the `GIT_TR2_PERF` environment variable or the
+`trace2.perfTarget` system or global config setting.
+
+For example
- a column-based format to replace GIT_TRACE_PERFORMANCE suitable for
- development and testing, possibly to complement tools like gprof.
-+
------------
$ export GIT_TR2_PERF=~/log.perf
$ git version
git version 2.20.1.155.g426c96fcdb
------------
-+
+
+or
+
+------------
+$ git config --global trace2.perfTarget ~/log.perf
+$ git version
+git version 2.20.1.155.g426c96fcdb
+------------
+
+yields
+
------------
$ cat ~/log.perf
12:28:42.620675 common-main.c:38 | d0 | main | version | | | | | 2.20.1.155.g426c96fcdb
@@ -66,16 +101,31 @@ $ cat ~/log.perf
12:28:42.621259 trace2/tr2_tgt_perf.c:211 | d0 | main | atexit | | 0.001265 | | | code:0
------------
-`GIT_TR2_EVENT` (EVENT)::
+=== The Event Format Target
+
+The event format target is a JSON-based format of event data suitable
+for telemetry analysis. This format is enabled with the `GIT_TR2_EVENT`
+environment variable or the `trace2.eventTarget` system or global config
+setting.
+
+For example
- a JSON-based format of event data suitable for telemetry analysis.
-+
------------
$ export GIT_TR2_EVENT=~/log.event
$ git version
git version 2.20.1.155.g426c96fcdb
------------
-+
+
+or
+
+------------
+$ git config --global trace2.eventTarget ~/log.event
+$ git version
+git version 2.20.1.155.g426c96fcdb
+------------
+
+yields
+
------------
$ cat ~/log.event
{"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
@@ -85,37 +135,12 @@ $ cat ~/log.event
{"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
------------
-== Enabling a Target
-
-A Trace2 Target is enabled when the corresponding environment variable
-(`GIT_TR2`, `GIT_TR2_PERF`, or `GIT_TR2_EVENT`) is set. The following
-values are recognized.
+=== Enabling a Target
-`0`::
-`false`::
+To enable a target, set the corresponding environment variable or
+system or global config value to one of the following:
- Disables the target.
-
-`1`::
-`true`::
-
- Enables the target and writes stream to `STDERR`.
-
-`[2-9]`::
-
- Enables the target and writes to the already opened file descriptor.
-
-`<absolute-pathname>`::
-
- Enables the target, opens and writes to the file in append mode.
-
-`af_unix:[<socket_type>:]<absolute-pathname>`::
-
- Enables the target, opens and writes to a Unix Domain Socket
- (on platforms that support them).
-+
-Socket type can be either `stream` or `dgram`. If the socket type is
-omitted, Git will try both.
+include::../trace2-target-values.txt[]
== Trace2 API
@@ -243,15 +268,16 @@ significantly affects program performance or behavior, such as
Emits a "def_param" messages for "important" configuration
settings.
+
-The environment variable `GIT_TR2_CONFIG_PARAMS` can be set to a
+The environment variable `GIT_TR2_CONFIG_PARAMS` or the `trace2.configParams`
+config value can be set to a
list of patterns of important configuration settings, for example:
`core.*,remote.*.url`. This function will iterate over all config
settings and emit a "def_param" message for each match.
`void trace2_cmd_set_config(const char *key, const char *value)`::
- Emits a "def_param" message for a specific configuration
- setting IFF it matches the `GIT_TR2_CONFIG_PARAMS` pattern.
+ Emits a "def_param" message for a new or updated key/value
+ pair IF `key` is considered important.
+
This is used to hook into `git_config_set()` and catch any
configuration changes and update a value previously reported by
@@ -418,9 +444,6 @@ recursive tree walk.
=== NORMAL Format
-NORMAL format is enabled when the `GIT_TR2` environment variable is
-set.
-
Events are written as lines of the form:
------------
@@ -437,8 +460,8 @@ Events are written as lines of the form:
Note that this may contain embedded LF or CRLF characters that are
not escaped, so the event may spill across multiple lines.
-If `GIT_TR2_BRIEF` is true, the `time`, `filename`, and `line` fields
-are omitted.
+If `GIT_TR2_BRIEF` or `trace2.normalBrief` is true, the `time`, `filename`,
+and `line` fields are omitted.
This target is intended to be more of a summary (like GIT_TRACE) and
less detailed than the other targets. It ignores thread, region, and
@@ -446,9 +469,6 @@ data messages, for example.
=== PERF Format
-PERF format is enabled when the `GIT_TR2_PERF` environment variable
-is set.
-
Events are written as lines of the form:
------------
@@ -508,8 +528,8 @@ This field is in anticipation of in-proc submodules in the future.
15:33:33.532712 wt-status.c:2331 | d0 | main | region_leave | r1 | 0.127568 | 0.001504 | status | label:print
------------
-If `GIT_TR2_PERF_BRIEF` is true, the `time`, `file`, and `line`
-fields are omitted.
+If `GIT_TR2_PERF_BRIEF` or `trace2.perfBrief` is true, the `time`, `file`,
+and `line` fields are omitted.
------------
d0 | main | region_leave | r1 | 0.011717 | 0.009122 | index | label:preload
@@ -520,9 +540,6 @@ during development and is quite noisy.
=== EVENT Format
-EVENT format is enabled when the `GIT_TR2_EVENT` environment
-variable is set.
-
Each event is a JSON-object containing multiple key/value pairs
written as a single line and followed by a LF.
@@ -576,9 +593,9 @@ The following key/value pairs are common to all events:
`"repo":<repo-id>`::
when present, is the integer repo-id as described previously.
-If `GIT_TR2_EVENT_BRIEF` is true, the `file` and `line` fields are omitted
-from all events and the `time` field is only present on the "start" and
-"atexit" events.
+If `GIT_TR2_EVENT_BRIEF` or `trace2.eventBrief` is true, the `file`
+and `line` fields are omitted from all events and the `time` field is
+only present on the "start" and "atexit" events.
==== Event-Specific Key/Value Pairs
@@ -889,7 +906,7 @@ visited.
The `category` field may be used in a future enhancement to
do category-based filtering.
+
-The `GIT_TR2_EVENT_NESTING` environment variable can be used to
+`GIT_TR2_EVENT_NESTING` or `trace2.eventNesting` can be used to
filter deeply nested regions and data events. It defaults to "2".
`"region_leave"`::
diff --git a/Documentation/trace2-target-values.txt b/Documentation/trace2-target-values.txt
new file mode 100644
index 0000000000..27d3c64e66
--- /dev/null
+++ b/Documentation/trace2-target-values.txt
@@ -0,0 +1,10 @@
+--
+* `0` or `false` - Disables the target.
+* `1` or `true` - Writes to `STDERR`.
+* `[2-9]` - Writes to the already opened file descriptor.
+* `<absolute-pathname>` - Writes to the file in append mode.
+* `af_unix:[<socket_type>:]<absolute-pathname>` - Write to a
+Unix DomainSocket (on platforms that support them). Socket
+type can be either `stream` or `dgram`; if omitted Git will
+try both.
+--
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* Re: [PATCH v3 00/10] trace2: load trace2 settings from system config
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
` (9 preceding siblings ...)
2019-04-11 15:18 ` [PATCH v3 10/10] trace2: update docs to describe system/global config settings Jeff Hostetler via GitGitGadget
@ 2019-04-12 2:29 ` Junio C Hamano
2019-04-12 13:47 ` Jeff Hostetler
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
11 siblings, 1 reply; 68+ messages in thread
From: Junio C Hamano @ 2019-04-12 2:29 UTC (permalink / raw)
To: Jeff Hostetler via GitGitGadget; +Cc: git, peff, jrnieder, steadmon, avarab
"Jeff Hostetler via GitGitGadget" <gitgitgadget@gmail.com> writes:
> Here is version 3.
> [] It incorporates Ævar's suggestions WRT the format and uniqueness of the
> SID. [] It now reads both system and global config for trace2 settings and
> handles includes as Jonathan suggested.
Following the ISO more closely with Ts and Zs in the format looks
like a good idea (i.e. it gives a more familiar-looking result). I
have no string opinions on the per-user config or inclusion, but I
think it probably is an essential ingredient to give an opt-out
escape hatch to make this appear less big-brotherly [*1*].
Side note *1*: and hence less scary. An otherwise useful
mechanism can have an appearance that it can also be misused
for bad purposes, and at that point, to those with fear, it
does not matter how useful an application the mechanism has.
I think "by default you are opting in due to your belonging
to this organization in the first place (hence we give you
/etc/gitconfig that lets us collect your usage patterns) but
you could easily opt-out by overriding in $HOME/.gitconfig"
strikes a good balance.
> I added a read_very_early_config() function that is similar to
> read_early_config()but omits repo local, worktree, and -c command line
> settings. This felt like a little bit of a hack, but it made the intent
> clear.
I am not yet judging if the "very early config" itself is a good
thing to have (and if it is good, then it is not a "hack" ;-)), but
I very much agree that it is a very good change to have a helper
that makes the intent clear.
> -+# Now test using system config by using a mocked up config file
> -+# rather than inheriting "/etc/gitconfig". Here we do not use
> -+# GIT_TR2* environment variables.
> -+
> +unset GIT_TR2_BRIEF
This does not have to be sane_unset, as we are not aiming for making
our tests "set -e" clean. But in tXXXX-*.sh scripts, it may not be
a bad idea to stick to sane_unset regardless, as people tend to cut
and paste without thinking enough.
> @@ -512,19 +454,28 @@
> + */
> +/* clang-format off */
>
> ++ [TR2_SYSENV_CFG_PARAM] = { "GIT_TR2_CONFIG_PARAMS",
> ++ "trace2.configparams" },
> ++
> ++ [TR2_SYSENV_DST_DEBUG] = { "GIT_TR2_DST_DEBUG",
> ++ "trace2.destinationdebug" },
> ++
> ++ [TR2_SYSENV_NORMAL] = { "GIT_TR2",
> ++ "trace2.normaltarget" },
> ++ [TR2_SYSENV_NORMAL_BRIEF] = { "GIT_TR2_BRIEF",
> ++ "trace2.normalbrief" },
> ++
> ++ [TR2_SYSENV_EVENT] = { "GIT_TR2_EVENT",
> ++ "trace2.eventtarget" },
> ++ [TR2_SYSENV_EVENT_BRIEF] = { "GIT_TR2_EVENT_BRIEF",
> ++ "trace2.eventbrief" },
> ++ [TR2_SYSENV_EVENT_NESTING] = { "GIT_TR2_EVENT_NESTING",
> ++ "trace2.eventnesting" },
> ++
> ++ [TR2_SYSENV_PERF] = { "GIT_TR2_PERF",
> ++ "trace2.perftarget" },
> ++ [TR2_SYSENV_PERF_BRIEF] = { "GIT_TR2_PERF_BRIEF",
> ++ "trace2.perfbrief" },
With use of designated initializers, the table got a lot cleaner to
read. Is the above "format off" still needed (I am a bit curious
how clang-format wants these entries to look like)?
> ++ if (pid > 999999)
> ++ strbuf_addf(&tr2sid_buf, "W%06d", (int)(pid % 1000000));
> ++ else
> ++ strbuf_addf(&tr2sid_buf, "P%06d", (int)pid);
I do not think it matters too much, but this is kind-of curious.
How would the users of the log utilize the distinction between W and
P? Do they discard the ones with W when they care about the exact
process that left the trace entries, or something? If it's not a
plausibly useful use pattern (and I do not think it is), I wonder if
we want to go with only W (i.e. truncated to the lower N digits)
entries, if you are shooting for a fixed-width output from this
function. If you want less chance of collisions, you obviously
could use hexadecimal to gain back a few more bits.
After all, if the application does care the PID, that could be in
the log data itself (i.e. an "start" event can say "my pid is blah").
Thanks. I'll wait until learning what others think.
^ permalink raw reply [flat|nested] 68+ messages in thread
* Re: [PATCH v3 00/10] trace2: load trace2 settings from system config
2019-04-12 2:29 ` [PATCH v3 00/10] trace2: load trace2 settings from system config Junio C Hamano
@ 2019-04-12 13:47 ` Jeff Hostetler
0 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler @ 2019-04-12 13:47 UTC (permalink / raw)
To: Junio C Hamano, Jeff Hostetler via GitGitGadget
Cc: git, peff, jrnieder, steadmon, avarab
On 4/11/2019 10:29 PM, Junio C Hamano wrote:
> "Jeff Hostetler via GitGitGadget" <gitgitgadget@gmail.com> writes:
>
[...]
>> @@ -512,19 +454,28 @@
>> + */
>> +/* clang-format off */
>>
>> ++ [TR2_SYSENV_CFG_PARAM] = { "GIT_TR2_CONFIG_PARAMS",
>> ++ "trace2.configparams" },
>> ++
>> ++ [TR2_SYSENV_DST_DEBUG] = { "GIT_TR2_DST_DEBUG",
>> ++ "trace2.destinationdebug" },
>> ++
>> ++ [TR2_SYSENV_NORMAL] = { "GIT_TR2",
>> ++ "trace2.normaltarget" },
>> ++ [TR2_SYSENV_NORMAL_BRIEF] = { "GIT_TR2_BRIEF",
>> ++ "trace2.normalbrief" },
>> ++
>> ++ [TR2_SYSENV_EVENT] = { "GIT_TR2_EVENT",
>> ++ "trace2.eventtarget" },
>> ++ [TR2_SYSENV_EVENT_BRIEF] = { "GIT_TR2_EVENT_BRIEF",
>> ++ "trace2.eventbrief" },
>> ++ [TR2_SYSENV_EVENT_NESTING] = { "GIT_TR2_EVENT_NESTING",
>> ++ "trace2.eventnesting" },
>> ++
>> ++ [TR2_SYSENV_PERF] = { "GIT_TR2_PERF",
>> ++ "trace2.perftarget" },
>> ++ [TR2_SYSENV_PERF_BRIEF] = { "GIT_TR2_PERF_BRIEF",
>> ++ "trace2.perfbrief" },
>
>
> With use of designated initializers, the table got a lot cleaner to
> read. Is the above "format off" still needed (I am a bit curious
> how clang-format wants these entries to look like)?
clang-format suggests getting rid of the extra whitespace on the
lines, so we lose all of the column alignment. Then it wants to
line-wrap some but not all of the lines. So it is a bit of a mess
to look at.
>
>> ++ if (pid > 999999)
>> ++ strbuf_addf(&tr2sid_buf, "W%06d", (int)(pid % 1000000));
>> ++ else
>> ++ strbuf_addf(&tr2sid_buf, "P%06d", (int)pid);
>
> I do not think it matters too much, but this is kind-of curious.
>
> How would the users of the log utilize the distinction between W and
> P? Do they discard the ones with W when they care about the exact
> process that left the trace entries, or something? If it's not a
> plausibly useful use pattern (and I do not think it is), I wonder if
> we want to go with only W (i.e. truncated to the lower N digits)
> entries, if you are shooting for a fixed-width output from this
> function. If you want less chance of collisions, you obviously
> could use hexadecimal to gain back a few more bits.
>
> After all, if the application does care the PID, that could be in
> the log data itself (i.e. an "start" event can say "my pid is blah").
Right. Ævar suggested adding the full or wrapped PID so that the SID
would be a fixed length. I stuck with decimal rather than hex because
it's easier to match up a running command with '/usr/bin/ps' output,
but that's no big deal either way. It might be simpler to just %08lx
it and be done with it.
Jeff
^ permalink raw reply [flat|nested] 68+ messages in thread
* [PATCH v4 00/10] trace2: load trace2 settings from system config
2019-04-11 15:18 ` [PATCH v3 00/10] " Jeff Hostetler via GitGitGadget
` (10 preceding siblings ...)
2019-04-12 2:29 ` [PATCH v3 00/10] trace2: load trace2 settings from system config Junio C Hamano
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 01/10] config: initialize opts structure in repo_read_config() Jeff Hostetler via GitGitGadget
` (10 more replies)
11 siblings, 11 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git; +Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano
Version 4 fixes a few clang-format warnings and simplifies the PID field in
the SID.
Jeff Hostetler (10):
config: initialize opts structure in repo_read_config()
trace2: refactor setting process starting time
trace2: add absolute elapsed time to start event
trace2: find exec-dir before trace2 initialization
config: add read_very_early_config()
trace2: use system/global config for default trace2 settings
trace2: report peak memory usage of the process
trace2: clarify UTC datetime formatting
trace2: make SIDs more unique
trace2: update docs to describe system/global config settings
Documentation/config.txt | 2 +
Documentation/config/trace2.txt | 56 ++++++++
Documentation/technical/api-trace2.txt | 176 +++++++++++++----------
Documentation/trace2-target-values.txt | 10 ++
Makefile | 1 +
common-main.c | 8 +-
compat/mingw.c | 2 +
compat/win32/trace2_win32_process_info.c | 50 ++++++-
config.c | 25 +++-
config.h | 4 +
t/t0210-trace2-normal.sh | 49 ++++++-
t/t0211-trace2-perf.sh | 43 ++++--
t/t0212-trace2-event.sh | 42 +++++-
trace2.c | 21 ++-
trace2.h | 43 ++++--
trace2/tr2_cfg.c | 7 +-
trace2/tr2_dst.c | 26 ++--
trace2/tr2_dst.h | 3 +-
trace2/tr2_sid.c | 53 ++++++-
trace2/tr2_sysenv.c | 127 ++++++++++++++++
trace2/tr2_sysenv.h | 36 +++++
trace2/tr2_tbuf.c | 19 ++-
trace2/tr2_tbuf.h | 5 +-
trace2/tr2_tgt.h | 1 +
trace2/tr2_tgt_event.c | 53 +++----
trace2/tr2_tgt_normal.c | 19 +--
trace2/tr2_tgt_perf.c | 23 +--
trace2/tr2_tls.c | 38 +++--
trace2/tr2_tls.h | 8 +-
29 files changed, 747 insertions(+), 203 deletions(-)
create mode 100644 Documentation/config/trace2.txt
create mode 100644 Documentation/trace2-target-values.txt
create mode 100644 trace2/tr2_sysenv.c
create mode 100644 trace2/tr2_sysenv.h
base-commit: 041f5ea1cf987a4068ef5f39ba0a09be85952064
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-169%2Fjeffhostetler%2Fcore-tr2-startup-and-sysenv-v4
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-169/jeffhostetler/core-tr2-startup-and-sysenv-v4
Pull-Request: https://github.com/gitgitgadget/git/pull/169
Range-diff vs v3:
1: ea8c199f91 ! 1: f6653f1c59 config: initialize opts structure in repo_read_config()
@@ -25,7 +25,7 @@
static void repo_read_config(struct repository *repo)
{
- struct config_options opts;
-+ struct config_options opts = {0};
++ struct config_options opts = { 0 };
opts.respect_includes = 1;
opts.commondir = repo->commondir;
2: 3dbcfc6a8d ! 2: 48e34834b6 trace2: refactor setting process starting time
@@ -196,8 +196,8 @@
- * thread's array (because of reallocs).
- */
- tr2tls_us_start_main = tr2tls_thread_main->array_us_start[0];
-+ tr2tls_thread_main = tr2tls_create_self("main",
-+ tr2tls_us_start_process);
++ tr2tls_thread_main =
++ tr2tls_create_self("main", tr2tls_us_start_process);
}
void tr2tls_release(void)
3: 8b00025af5 = 3: 175371fb54 trace2: add absolute elapsed time to start event
4: c3c5f6a96b = 4: 94729b284c trace2: find exec-dir before trace2 initialization
5: d15be7b63a ! 5: b0fe1385f1 config: add read_very_early_config()
@@ -16,8 +16,8 @@
current_parsing_scope = CONFIG_SCOPE_REPO;
- if (repo_config && !access_or_die(repo_config, R_OK, 0))
-+ if (!opts->ignore_repo &&
-+ repo_config && !access_or_die(repo_config, R_OK, 0))
++ if (!opts->ignore_repo && repo_config &&
++ !access_or_die(repo_config, R_OK, 0))
ret += git_config_from_file(fn, repo_config, data);
/*
@@ -25,8 +25,7 @@
* But let's not complicate things before it's actually needed.
*/
- if (repository_format_worktree_config) {
-+ if (!opts->ignore_worktree &&
-+ repository_format_worktree_config) {
++ if (!opts->ignore_worktree && repository_format_worktree_config) {
char *path = git_pathdup("config.worktree");
if (!access_or_die(path, R_OK, 0))
ret += git_config_from_file(fn, path, data);
@@ -35,8 +34,7 @@
current_parsing_scope = CONFIG_SCOPE_CMDLINE;
- if (git_config_from_parameters(fn, data) < 0)
-+ if (!opts->ignore_cmdline &&
-+ git_config_from_parameters(fn, data) < 0)
++ if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
die(_("unable to parse command-line config"));
current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
@@ -50,7 +48,7 @@
+ */
+void read_very_early_config(config_fn_t cb, void *data)
+{
-+ struct config_options opts = {0};
++ struct config_options opts = { 0 };
+
+ opts.respect_includes = 1;
+ opts.ignore_repo = 1;
6: c085a482dd ! 6: 550cad6189 trace2: use system/global config for default trace2 settings
@@ -41,16 +41,17 @@
--- a/t/t0210-trace2-normal.sh
+++ b/t/t0210-trace2-normal.sh
@@
- #!/bin/sh
-
-+# Turn off any inherited trace2 settings for this test.
-+unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-+unset GIT_TR2_BRIEF
-+unset GIT_TR2_CONFIG_PARAMS
-+
test_description='test trace2 facility (normal target)'
. ./test-lib.sh
++# Turn off any inherited trace2 settings for this test.
++sane_unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
++sane_unset GIT_TR2_BRIEF
++sane_unset GIT_TR2_CONFIG_PARAMS
++
+ # Add t/helper directory to PATH so that we can use a relative
+ # path to run nested instances of test-tool.exe (see 004child).
+ # This helps with HEREDOC comparisons later.
@@
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
@@ -67,7 +68,7 @@
test_cmp expect actual
'
-+unset GIT_TR2_BRIEF
++sane_unset GIT_TR2_BRIEF
+
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
@@ -112,16 +113,17 @@
--- a/t/t0211-trace2-perf.sh
+++ b/t/t0211-trace2-perf.sh
@@
- #!/bin/sh
-
-+# Turn off any inherited trace2 settings for this test.
-+unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-+unset GIT_TR2_PERF_BRIEF
-+unset GIT_TR2_CONFIG_PARAMS
-+
test_description='test trace2 facility (perf target)'
. ./test-lib.sh
++# Turn off any inherited trace2 settings for this test.
++sane_unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
++sane_unset GIT_TR2_PERF_BRIEF
++sane_unset GIT_TR2_CONFIG_PARAMS
++
+ # Add t/helper directory to PATH so that we can use a relative
+ # path to run nested instances of test-tool.exe (see 004child).
+ # This helps with HEREDOC comparisons later.
@@
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
@@ -138,7 +140,7 @@
test_cmp expect actual
'
-+unset GIT_TR2_PERF_BRIEF
++sane_unset GIT_TR2_PERF_BRIEF
+
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
@@ -165,16 +167,17 @@
--- a/t/t0212-trace2-event.sh
+++ b/t/t0212-trace2-event.sh
@@
- #!/bin/sh
+ test_description='test trace2 facility'
+ . ./test-lib.sh
+# Turn off any inherited trace2 settings for this test.
-+unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-+unset GIT_TR2_BARE
-+unset GIT_TR2_CONFIG_PARAMS
++sane_unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
++sane_unset GIT_TR2_BARE
++sane_unset GIT_TR2_CONFIG_PARAMS
+
- test_description='test trace2 facility'
- . ./test-lib.sh
+ perl -MJSON::PP -e 0 >/dev/null 2>&1 && test_set_prereq JSON_PP
+ # Add t/helper directory to PATH so that we can use a relative
@@
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
@@ -353,7 +356,8 @@
if (tr2_dst_want_warning())
warning("trace2: invalid AF_UNIX value '%s' for '%s' tracing",
- tgt_value, dst->env_var_name);
-+ tgt_value, tr2_sysenv_display_name(dst->sysenv_var));
++ tgt_value,
++ tr2_sysenv_display_name(dst->sysenv_var));
tr2_dst_trace_disable(dst);
return 0;
@@ -371,7 +375,8 @@
if (tr2_dst_want_warning())
warning("trace2: could not connect to socket '%s' for '%s' tracing: %s",
- path, dst->env_var_name, strerror(e));
-+ path, tr2_sysenv_display_name(dst->sysenv_var), strerror(e));
++ path, tr2_sysenv_display_name(dst->sysenv_var),
++ strerror(e));
tr2_dst_trace_disable(dst);
return 0;
7: 2a7a933875 ! 7: 56d8ce3fd6 trace2: report peak memory usage of the process
@@ -40,8 +40,8 @@
+ */
+static void get_peak_memory_info(void)
+{
-+ DECLARE_PROC_ADDR(psapi.dll, BOOL, GetProcessMemoryInfo,
-+ HANDLE, PPROCESS_MEMORY_COUNTERS, DWORD);
++ DECLARE_PROC_ADDR(psapi.dll, BOOL, GetProcessMemoryInfo, HANDLE,
++ PPROCESS_MEMORY_COUNTERS, DWORD);
+
+ if (INIT_PROC_ADDR(GetProcessMemoryInfo)) {
+ PROCESS_MEMORY_COUNTERS pmc;
8: 56f357dc7b = 8: 196a9d2c85 trace2: clarify UTC datetime formatting
9: 156ffde489 ! 9: 9fdcb50140 trace2: make SIDs more unique
@@ -63,7 +63,7 @@
+ * Compute the final component of the SID representing the current process.
+ * This should uniquely identify the process and be a valid filename (to
+ * allow writing trace2 data to per-process files). It should also be fixed
-+ * possible length for use as a database key.
++ * length for possible use as a database key.
+ *
+ * "<yyyymmdd>T<hhmmss>.<fraction>Z-<host>-<process>"
+ *
@@ -71,17 +71,19 @@
+ * "H<first_8_chars_of_sha1_of_hostname>"
+ * "Localhost" when no hostname.
+ *
-+ * where <process> is a possibly wrapped PID:
-+ * "P<6-digit-pid>"
-+ * "W<wrapped-6-digit-pid>" when PID too big.
-+ *
++ * where <process> is a 9 character string containing the least signifcant
++ * 32 bits in the process-id.
++ * "P<pid>"
++ * (This is an abribrary choice. On most systems pid_t is a 32 bit value,
++ * so limit doesn't matter. On larger systems, a truncated value is fine
++ * for our purposes here.)
+ */
+static void tr2_sid_append_my_sid_component(void)
+{
+ const struct git_hash_algo *algo = &hash_algos[GIT_HASH_SHA1];
+ struct tr2_tbuf tb_now;
+ git_hash_ctx ctx;
-+ uintmax_t pid = getpid();
++ pid_t pid = getpid();
+ unsigned char hash[GIT_MAX_RAWSZ + 1];
+ char hex[GIT_MAX_HEXSZ + 1];
+ char hostname[HOST_NAME_MAX + 1];
@@ -101,11 +103,7 @@
+ strbuf_add(&tr2sid_buf, hex, 8);
+ }
+
-+ strbuf_addch(&tr2sid_buf, '-');
-+ if (pid > 999999)
-+ strbuf_addf(&tr2sid_buf, "W%06d", (int)(pid % 1000000));
-+ else
-+ strbuf_addf(&tr2sid_buf, "P%06d", (int)pid);
++ strbuf_addf(&tr2sid_buf, "-P%08"PRIx32, (uint32_t)pid);
+}
+
/*
@@ -149,10 +147,9 @@
+ secs = tv.tv_sec;
+ gmtime_r(&secs, &tm);
+
-+ xsnprintf(tb->buf, sizeof(tb->buf),
-+ "%4d%02d%02dT%02d%02d%02d.%06ldZ", tm.tm_year + 1900,
-+ tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec,
-+ (long)tv.tv_usec);
++ xsnprintf(tb->buf, sizeof(tb->buf), "%4d%02d%02dT%02d%02d%02d.%06ldZ",
++ tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour,
++ tm.tm_min, tm.tm_sec, (long)tv.tv_usec);
+}
diff --git a/trace2/tr2_tbuf.h b/trace2/tr2_tbuf.h
10: 285beb2b2d ! 10: 3414016d04 trace2: update docs to describe system/global config settings
@@ -188,53 +188,59 @@
git version 2.20.1.155.g426c96fcdb
------------
-+
-+
-+or
-+
-+------------
-+$ git config --global trace2.eventTarget ~/log.event
-+$ git version
-+git version 2.20.1.155.g426c96fcdb
-+------------
-+
-+yields
-+
- ------------
- $ cat ~/log.event
- {"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-@@
- {"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
- ------------
-
+-------------
+-$ cat ~/log.event
+-{"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
+-{"event":"start","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
+-{"event":"cmd_name","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
+-{"event":"exit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
+-{"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
+-------------
+-
-== Enabling a Target
-
-A Trace2 Target is enabled when the corresponding environment variable
-(`GIT_TR2`, `GIT_TR2_PERF`, or `GIT_TR2_EVENT`) is set. The following
-values are recognized.
-+=== Enabling a Target
-
+-
-`0`::
-`false`::
-+To enable a target, set the corresponding environment variable or
-+system or global config value to one of the following:
-
-- Disables the target.
-
+- Disables the target.
+
-`1`::
-`true`::
--
++or
+
- Enables the target and writes stream to `STDERR`.
-
-`[2-9]`::
--
++------------
++$ git config --global trace2.eventTarget ~/log.event
++$ git version
++git version 2.20.1.155.g426c96fcdb
++------------
+
- Enables the target and writes to the already opened file descriptor.
--
++yields
+
-`<absolute-pathname>`::
--
++------------
++$ cat ~/log.event
++{"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
++{"event":"start","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
++{"event":"cmd_name","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
++{"event":"exit","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
++{"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
++------------
+
- Enables the target, opens and writes to the file in append mode.
--
++=== Enabling a Target
+
-`af_unix:[<socket_type>:]<absolute-pathname>`::
--
++To enable a target, set the corresponding environment variable or
++system or global config value to one of the following:
+
- Enables the target, opens and writes to a Unix Domain Socket
- (on platforms that support them).
-+
@@ -316,6 +322,15 @@
Each event is a JSON-object containing multiple key/value pairs
written as a single line and followed by a LF.
+@@
+ ------------
+ {
+ "event":"version",
+- "sid":"20190408T191827.272759Z-H9b68c35f-P011764",
++ "sid":"20190408T191827.272759Z-H9b68c35f-P00003510",
+ "thread":"main",
+ "time":"2019-04-08T19:18:27.282761Z",
+ "file":"common-main.c",
@@
`"repo":<repo-id>`::
when present, is the integer repo-id as described previously.
--
gitgitgadget
^ permalink raw reply [flat|nested] 68+ messages in thread
* [PATCH v4 01/10] config: initialize opts structure in repo_read_config()
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 02/10] trace2: refactor setting process starting time Jeff Hostetler via GitGitGadget
` (9 subsequent siblings)
10 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Initialize opts structure in repo_read_config().
This change fixes a crash in later commit after a new field is added
to the structure.
In commit 3b256228a66f8587661481ef3e08259864f3ba2a, repo_read_config()
was added. It only initializes 3 fields in the opts structure. It is
passed to config_with_options() and then to do_git_config_sequence().
However, do_git_config_sequence() drops the opts on the floor and calls
git_config_from_file() rather than git_config_from_file_with_options(),
so that may be why this hasn't been a problem in the past.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
config.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/config.c b/config.c
index 0f0cdd8c0f..c809f76219 100644
--- a/config.c
+++ b/config.c
@@ -2011,7 +2011,7 @@ int git_configset_get_pathname(struct config_set *cs, const char *key, const cha
/* Functions use to read configuration from a repository */
static void repo_read_config(struct repository *repo)
{
- struct config_options opts;
+ struct config_options opts = { 0 };
opts.respect_includes = 1;
opts.commondir = repo->commondir;
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v4 02/10] trace2: refactor setting process starting time
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 01/10] config: initialize opts structure in repo_read_config() Jeff Hostetler via GitGitGadget
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 03/10] trace2: add absolute elapsed time to start event Jeff Hostetler via GitGitGadget
` (8 subsequent siblings)
10 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Create trace2_initialize_clock() and call from main() to capture
process start time in isolation and before other sub-systems are
ready.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 12 ++++++--
common-main.c | 2 ++
compat/mingw.c | 2 ++
trace2.c | 7 ++++-
trace2.h | 17 ++++++++++++
trace2/tr2_tls.c | 38 ++++++++++++++++----------
trace2/tr2_tls.h | 8 +++++-
7 files changed, 67 insertions(+), 19 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index 2de565fa3d..f37fccf1da 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -160,17 +160,23 @@ purposes.
These are concerned with the lifetime of the overall git process.
+`void trace2_initialize_clock()`::
+
+ Initialize the Trace2 start clock and nothing else. This should
+ be called at the very top of main() to capture the process start
+ time and reduce startup order dependencies.
+
`void trace2_initialize()`::
Determines if any Trace2 Targets should be enabled and
- initializes the Trace2 facility. This includes starting the
- elapsed time clocks and thread local storage (TLS).
+ initializes the Trace2 facility. This includes setting up the
+ Trace2 thread local storage (TLS).
+
This function emits a "version" message containing the version of git
and the Trace2 protocol.
+
This function should be called from `main()` as early as possible in
-the life of the process.
+the life of the process after essential process initialization.
`int trace2_is_enabled()`::
diff --git a/common-main.c b/common-main.c
index d484aec209..6137af0e63 100644
--- a/common-main.c
+++ b/common-main.c
@@ -27,6 +27,8 @@ int main(int argc, const char **argv)
{
int result;
+ trace2_initialize_clock();
+
/*
* Always open file descriptors 0/1/2 to avoid clobbering files
* in die(). It also avoids messing up when the pipes are dup'ed
diff --git a/compat/mingw.c b/compat/mingw.c
index 6b04514cdc..a2f74aca6a 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -2569,6 +2569,8 @@ void mingw_startup(void)
wchar_t **wenv, **wargv;
_startupinfo si;
+ trace2_initialize_clock();
+
maybe_redirect_std_handles();
/* get wide char arguments and environment */
diff --git a/trace2.c b/trace2.c
index ccccd4ef09..6dd51e6aa5 100644
--- a/trace2.c
+++ b/trace2.c
@@ -142,6 +142,11 @@ static void tr2main_signal_handler(int signo)
raise(signo);
}
+void trace2_initialize_clock(void)
+{
+ tr2tls_start_process_clock();
+}
+
void trace2_initialize_fl(const char *file, int line)
{
struct tr2_tgt *tgt_j;
@@ -428,7 +433,7 @@ void trace2_thread_start_fl(const char *file, int line, const char *thread_name)
us_now = getnanotime() / 1000;
us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
- tr2tls_create_self(thread_name);
+ tr2tls_create_self(thread_name, us_now);
for_each_wanted_builtin (j, tgt_j)
if (tgt_j->pfn_thread_start_fl)
diff --git a/trace2.h b/trace2.h
index ae5020d0e6..8f89e70c44 100644
--- a/trace2.h
+++ b/trace2.h
@@ -19,6 +19,23 @@ struct json_writer;
* [] trace2_printf* -- legacy trace[1] messages.
*/
+/*
+ * Initialize the TRACE2 clock and do nothing else, in particular
+ * no mallocs, no system inspection, and no environment inspection.
+ *
+ * This should be called at the very top of main() to capture the
+ * process start time. This is intended to reduce chicken-n-egg
+ * bootstrap pressure.
+ *
+ * It is safe to call this more than once. This allows capturing
+ * absolute startup costs on Windows which uses a little trickery
+ * to do setup work before common-main.c:main() is called.
+ *
+ * The main trace2_initialize_fl() may be called a little later
+ * after more infrastructure is established.
+ */
+void trace2_initialize_clock(void);
+
/*
* Initialize TRACE2 tracing facility if any of the builtin TRACE2
* targets are enabled in the environment. Emits a 'version' event.
diff --git a/trace2/tr2_tls.c b/trace2/tr2_tls.c
index 8e65b0361d..e76d8c5d92 100644
--- a/trace2/tr2_tls.c
+++ b/trace2/tr2_tls.c
@@ -10,16 +10,30 @@
#define TR2_REGION_NESTING_INITIAL_SIZE (100)
static struct tr2tls_thread_ctx *tr2tls_thread_main;
-static uint64_t tr2tls_us_start_main;
+static uint64_t tr2tls_us_start_process;
static pthread_mutex_t tr2tls_mutex;
static pthread_key_t tr2tls_key;
static int tr2_next_thread_id; /* modify under lock */
-struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name)
+void tr2tls_start_process_clock(void)
+{
+ if (tr2tls_us_start_process)
+ return;
+
+ /*
+ * Keep the absolute start time of the process (i.e. the main
+ * process) in a fixed variable since other threads need to
+ * access it. This allows them to do that without a lock on
+ * main thread's array data (because of reallocs).
+ */
+ tr2tls_us_start_process = getnanotime() / 1000;
+}
+
+struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name,
+ uint64_t us_thread_start)
{
- uint64_t us_now = getnanotime() / 1000;
struct tr2tls_thread_ctx *ctx = xcalloc(1, sizeof(*ctx));
/*
@@ -29,7 +43,7 @@ struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name)
*/
ctx->alloc = TR2_REGION_NESTING_INITIAL_SIZE;
ctx->array_us_start = (uint64_t *)xcalloc(ctx->alloc, sizeof(uint64_t));
- ctx->array_us_start[ctx->nr_open_regions++] = us_now;
+ ctx->array_us_start[ctx->nr_open_regions++] = us_thread_start;
ctx->thread_id = tr2tls_locked_increment(&tr2_next_thread_id);
@@ -55,7 +69,7 @@ struct tr2tls_thread_ctx *tr2tls_get_self(void)
* here and silently continue.
*/
if (!ctx)
- ctx = tr2tls_create_self("unknown");
+ ctx = tr2tls_create_self("unknown", getnanotime() / 1000);
return ctx;
}
@@ -124,22 +138,18 @@ uint64_t tr2tls_absolute_elapsed(uint64_t us)
if (!tr2tls_thread_main)
return 0;
- return us - tr2tls_us_start_main;
+ return us - tr2tls_us_start_process;
}
void tr2tls_init(void)
{
+ tr2tls_start_process_clock();
+
pthread_key_create(&tr2tls_key, NULL);
init_recursive_mutex(&tr2tls_mutex);
- tr2tls_thread_main = tr2tls_create_self("main");
- /*
- * Keep a copy of the absolute start time of the main thread
- * in a fixed variable since other threads need to access it.
- * This also eliminates the need to lock accesses to the main
- * thread's array (because of reallocs).
- */
- tr2tls_us_start_main = tr2tls_thread_main->array_us_start[0];
+ tr2tls_thread_main =
+ tr2tls_create_self("main", tr2tls_us_start_process);
}
void tr2tls_release(void)
diff --git a/trace2/tr2_tls.h b/trace2/tr2_tls.h
index bb80e3f8e7..b1e327a928 100644
--- a/trace2/tr2_tls.h
+++ b/trace2/tr2_tls.h
@@ -31,7 +31,8 @@ struct tr2tls_thread_ctx {
* In this and all following functions the term "self" refers to the
* current thread.
*/
-struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name);
+struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name,
+ uint64_t us_thread_start);
/*
* Get our TLS data.
@@ -94,4 +95,9 @@ void tr2tls_release(void);
*/
int tr2tls_locked_increment(int *p);
+/*
+ * Capture the process start time and do nothing else.
+ */
+void tr2tls_start_process_clock(void);
+
#endif /* TR2_TLS_H */
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v4 03/10] trace2: add absolute elapsed time to start event
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 01/10] config: initialize opts structure in repo_read_config() Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 02/10] trace2: refactor setting process starting time Jeff Hostetler via GitGitGadget
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 04/10] trace2: find exec-dir before trace2 initialization Jeff Hostetler via GitGitGadget
` (7 subsequent siblings)
10 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Add elapsed process time to "start" event to measure
the performance of early process startup.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 11 ++++++-----
t/t0211-trace2-perf.sh | 12 ++++++------
trace2.c | 8 +++++++-
trace2/tr2_tgt.h | 1 +
trace2/tr2_tgt_event.c | 5 ++++-
trace2/tr2_tgt_normal.c | 3 ++-
trace2/tr2_tgt_perf.c | 7 ++++---
7 files changed, 30 insertions(+), 17 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index f37fccf1da..baaa1153bb 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -60,7 +60,7 @@ git version 2.20.1.155.g426c96fcdb
------------
$ cat ~/log.perf
12:28:42.620675 common-main.c:38 | d0 | main | version | | | | | 2.20.1.155.g426c96fcdb
-12:28:42.621001 common-main.c:39 | d0 | main | start | | | | | git version
+12:28:42.621001 common-main.c:39 | d0 | main | start | | 0.001173 | | | git version
12:28:42.621111 git.c:432 | d0 | main | cmd_name | | | | | version (version)
12:28:42.621225 git.c:662 | d0 | main | exit | | 0.001227 | | | code:0
12:28:42.621259 trace2/tr2_tgt_perf.c:211 | d0 | main | atexit | | 0.001265 | | | code:0
@@ -79,7 +79,7 @@ git version 2.20.1.155.g426c96fcdb
------------
$ cat ~/log.event
{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.620713","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621027","file":"common-main.c","line":39,"argv":["git","version"]}
+{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621027","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621122","file":"git.c","line":432,"name":"version","hierarchy":"version"}
{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621236","file":"git.c","line":662,"t_abs":0.001227,"code":0}
{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621268","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
@@ -601,6 +601,7 @@ from all events and the `time` field is only present on the "start" and
{
"event":"start",
...
+ "t_abs":0.001227, # elapsed time in seconds
"argv":["git","version"]
}
------------
@@ -1118,7 +1119,7 @@ $ git status
$ cat ~/log.perf
d0 | main | version | | | | | 2.20.1.160.g5676107ecd.dirty
-d0 | main | start | | | | | git status
+d0 | main | start | | 0.001173 | | | git status
d0 | main | def_repo | r1 | | | | worktree:/Users/jeffhost/work/gfw
d0 | main | cmd_name | | | | | status (status)
...
@@ -1163,7 +1164,7 @@ $ git status
...
$ cat ~/log.perf
d0 | main | version | | | | | 2.20.1.162.gb4ccea44db.dirty
-d0 | main | start | | | | | git status
+d0 | main | start | | 0.001173 | | | git status
d0 | main | def_repo | r1 | | | | worktree:/Users/jeffhost/work/gfw
d0 | main | cmd_name | | | | | status (status)
...
@@ -1219,7 +1220,7 @@ $ git status
...
$ cat ~/log.perf
d0 | main | version | | | | | 2.20.1.156.gf9916ae094.dirty
-d0 | main | start | | | | | git status
+d0 | main | start | | 0.001173 | | | git status
d0 | main | def_repo | r1 | | | | worktree:/Users/jeffhost/work/gfw
d0 | main | cmd_name | | | | | status (status)
d0 | main | region_enter | r1 | 0.001791 | | index | label:do_read_index .git/index
diff --git a/t/t0211-trace2-perf.sh b/t/t0211-trace2-perf.sh
index 953e2f7847..c9694b29f7 100755
--- a/t/t0211-trace2-perf.sh
+++ b/t/t0211-trace2-perf.sh
@@ -50,7 +50,7 @@ test_expect_success 'perf stream, return code 0' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 001return 0
+ d0|main|start||_T_ABS_|||_EXE_ trace2 001return 0
d0|main|cmd_name|||||trace2 (trace2)
d0|main|exit||_T_ABS_|||code:0
d0|main|atexit||_T_ABS_|||code:0
@@ -64,7 +64,7 @@ test_expect_success 'perf stream, return code 1' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 001return 1
+ d0|main|start||_T_ABS_|||_EXE_ trace2 001return 1
d0|main|cmd_name|||||trace2 (trace2)
d0|main|exit||_T_ABS_|||code:1
d0|main|atexit||_T_ABS_|||code:1
@@ -82,7 +82,7 @@ test_expect_success 'perf stream, error event' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 003error '\''hello world'\'' '\''this is a test'\''
+ d0|main|start||_T_ABS_|||_EXE_ trace2 003error '\''hello world'\'' '\''this is a test'\''
d0|main|cmd_name|||||trace2 (trace2)
d0|main|error|||||hello world
d0|main|error|||||this is a test
@@ -128,15 +128,15 @@ test_expect_success 'perf stream, child processes' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 004child test-tool trace2 004child test-tool trace2 001return 0
+ d0|main|start||_T_ABS_|||_EXE_ trace2 004child test-tool trace2 004child test-tool trace2 001return 0
d0|main|cmd_name|||||trace2 (trace2)
d0|main|child_start||_T_ABS_|||[ch0] class:? argv: test-tool trace2 004child test-tool trace2 001return 0
d1|main|version|||||$V
- d1|main|start|||||_EXE_ trace2 004child test-tool trace2 001return 0
+ d1|main|start||_T_ABS_|||_EXE_ trace2 004child test-tool trace2 001return 0
d1|main|cmd_name|||||trace2 (trace2/trace2)
d1|main|child_start||_T_ABS_|||[ch0] class:? argv: test-tool trace2 001return 0
d2|main|version|||||$V
- d2|main|start|||||_EXE_ trace2 001return 0
+ d2|main|start||_T_ABS_|||_EXE_ trace2 001return 0
d2|main|cmd_name|||||trace2 (trace2/trace2/trace2)
d2|main|exit||_T_ABS_|||code:0
d2|main|atexit||_T_ABS_|||code:0
diff --git a/trace2.c b/trace2.c
index 6dd51e6aa5..1c180062dd 100644
--- a/trace2.c
+++ b/trace2.c
@@ -182,13 +182,19 @@ void trace2_cmd_start_fl(const char *file, int line, const char **argv)
{
struct tr2_tgt *tgt_j;
int j;
+ uint64_t us_now;
+ uint64_t us_elapsed_absolute;
if (!trace2_enabled)
return;
+ us_now = getnanotime() / 1000;
+ us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
+
for_each_wanted_builtin (j, tgt_j)
if (tgt_j->pfn_start_fl)
- tgt_j->pfn_start_fl(file, line, argv);
+ tgt_j->pfn_start_fl(file, line, us_elapsed_absolute,
+ argv);
}
int trace2_cmd_exit_fl(const char *file, int line, int code)
diff --git a/trace2/tr2_tgt.h b/trace2/tr2_tgt.h
index 297bb8ffbe..7b90469212 100644
--- a/trace2/tr2_tgt.h
+++ b/trace2/tr2_tgt.h
@@ -15,6 +15,7 @@ typedef void(tr2_tgt_term_t)(void);
typedef void(tr2_tgt_evt_version_fl_t)(const char *file, int line);
typedef void(tr2_tgt_evt_start_fl_t)(const char *file, int line,
+ uint64_t us_elapsed_absolute,
const char **argv);
typedef void(tr2_tgt_evt_exit_fl_t)(const char *file, int line,
uint64_t us_elapsed_absolute, int code);
diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
index 107cb5317d..89a4d3ae9a 100644
--- a/trace2/tr2_tgt_event.c
+++ b/trace2/tr2_tgt_event.c
@@ -122,13 +122,16 @@ static void fn_version_fl(const char *file, int line)
jw_release(&jw);
}
-static void fn_start_fl(const char *file, int line, const char **argv)
+static void fn_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char **argv)
{
const char *event_name = "start";
struct json_writer jw = JSON_WRITER_INIT;
+ double t_abs = (double)us_elapsed_absolute / 1000000.0;
jw_object_begin(&jw, 0);
event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_double(&jw, "t_abs", 6, t_abs);
jw_object_inline_begin_array(&jw, "argv");
jw_array_argv(&jw, argv);
jw_end(&jw);
diff --git a/trace2/tr2_tgt_normal.c b/trace2/tr2_tgt_normal.c
index 547183d5b6..57f3e18f5b 100644
--- a/trace2/tr2_tgt_normal.c
+++ b/trace2/tr2_tgt_normal.c
@@ -81,7 +81,8 @@ static void fn_version_fl(const char *file, int line)
strbuf_release(&buf_payload);
}
-static void fn_start_fl(const char *file, int line, const char **argv)
+static void fn_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char **argv)
{
struct strbuf buf_payload = STRBUF_INIT;
diff --git a/trace2/tr2_tgt_perf.c b/trace2/tr2_tgt_perf.c
index f0746fcf86..9c3b4d8a0f 100644
--- a/trace2/tr2_tgt_perf.c
+++ b/trace2/tr2_tgt_perf.c
@@ -159,15 +159,16 @@ static void fn_version_fl(const char *file, int line)
strbuf_release(&buf_payload);
}
-static void fn_start_fl(const char *file, int line, const char **argv)
+static void fn_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char **argv)
{
const char *event_name = "start";
struct strbuf buf_payload = STRBUF_INIT;
sq_quote_argv_pretty(&buf_payload, argv);
- perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
- &buf_payload);
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ NULL, NULL, &buf_payload);
strbuf_release(&buf_payload);
}
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v4 04/10] trace2: find exec-dir before trace2 initialization
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
` (2 preceding siblings ...)
2019-04-15 20:39 ` [PATCH v4 03/10] trace2: add absolute elapsed time to start event Jeff Hostetler via GitGitGadget
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 05/10] config: add read_very_early_config() Jeff Hostetler via GitGitGadget
` (6 subsequent siblings)
10 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Teach Git to resolve the executable directory before initializing
Trace2. This allows the system configuration directory to be
discovered earlier (because it is sometimes relative to the prefix
or runtime-prefix).
This will be used by the next commit to allow trace2 settings to
be loaded from the system config.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
common-main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/common-main.c b/common-main.c
index 6137af0e63..299ca62a72 100644
--- a/common-main.c
+++ b/common-main.c
@@ -37,12 +37,12 @@ int main(int argc, const char **argv)
sanitize_stdfds();
restore_sigpipe_to_default();
+ git_resolve_executable_dir(argv[0]);
+
trace2_initialize();
trace2_cmd_start(argv);
trace2_collect_process_info();
- git_resolve_executable_dir(argv[0]);
-
git_setup_gettext();
initialize_the_repository();
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v4 05/10] config: add read_very_early_config()
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
` (3 preceding siblings ...)
2019-04-15 20:39 ` [PATCH v4 04/10] trace2: find exec-dir before trace2 initialization Jeff Hostetler via GitGitGadget
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 06/10] trace2: use system/global config for default trace2 settings Jeff Hostetler via GitGitGadget
` (5 subsequent siblings)
10 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Created an even lighter version of read_early_config() that
only looks at system and global config settings. It omits
repo-local, worktree-local, and command-line settings.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
config.c | 23 ++++++++++++++++++++---
config.h | 4 ++++
2 files changed, 24 insertions(+), 3 deletions(-)
diff --git a/config.c b/config.c
index c809f76219..d7a08713a8 100644
--- a/config.c
+++ b/config.c
@@ -1688,14 +1688,15 @@ static int do_git_config_sequence(const struct config_options *opts,
ret += git_config_from_file(fn, user_config, data);
current_parsing_scope = CONFIG_SCOPE_REPO;
- if (repo_config && !access_or_die(repo_config, R_OK, 0))
+ if (!opts->ignore_repo && repo_config &&
+ !access_or_die(repo_config, R_OK, 0))
ret += git_config_from_file(fn, repo_config, data);
/*
* Note: this should have a new scope, CONFIG_SCOPE_WORKTREE.
* But let's not complicate things before it's actually needed.
*/
- if (repository_format_worktree_config) {
+ if (!opts->ignore_worktree && repository_format_worktree_config) {
char *path = git_pathdup("config.worktree");
if (!access_or_die(path, R_OK, 0))
ret += git_config_from_file(fn, path, data);
@@ -1703,7 +1704,7 @@ static int do_git_config_sequence(const struct config_options *opts,
}
current_parsing_scope = CONFIG_SCOPE_CMDLINE;
- if (git_config_from_parameters(fn, data) < 0)
+ if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
die(_("unable to parse command-line config"));
current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
@@ -1794,6 +1795,22 @@ void read_early_config(config_fn_t cb, void *data)
strbuf_release(&gitdir);
}
+/*
+ * Read config but only enumerate system and global settings.
+ * Omit any repo-local, worktree-local, or command-line settings.
+ */
+void read_very_early_config(config_fn_t cb, void *data)
+{
+ struct config_options opts = { 0 };
+
+ opts.respect_includes = 1;
+ opts.ignore_repo = 1;
+ opts.ignore_worktree = 1;
+ opts.ignore_cmdline = 1;
+
+ config_with_options(cb, data, NULL, &opts);
+}
+
static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
{
struct config_set_element k;
diff --git a/config.h b/config.h
index ee5d3fa7b4..6a58d61d22 100644
--- a/config.h
+++ b/config.h
@@ -55,6 +55,9 @@ typedef int (*config_parser_event_fn_t)(enum config_event_t type,
struct config_options {
unsigned int respect_includes : 1;
+ unsigned int ignore_repo : 1;
+ unsigned int ignore_worktree : 1;
+ unsigned int ignore_cmdline : 1;
const char *commondir;
const char *git_dir;
config_parser_event_fn_t event_fn;
@@ -83,6 +86,7 @@ extern int git_config_from_blob_oid(config_fn_t fn, const char *name,
extern void git_config_push_parameter(const char *text);
extern int git_config_from_parameters(config_fn_t fn, void *data);
extern void read_early_config(config_fn_t cb, void *data);
+extern void read_very_early_config(config_fn_t cb, void *data);
extern void git_config(config_fn_t fn, void *);
extern int config_with_options(config_fn_t fn, void *,
struct git_config_source *config_source,
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v4 06/10] trace2: use system/global config for default trace2 settings
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
` (4 preceding siblings ...)
2019-04-15 20:39 ` [PATCH v4 05/10] config: add read_very_early_config() Jeff Hostetler via GitGitGadget
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-27 13:43 ` SZEDER Gábor
2019-04-15 20:39 ` [PATCH v4 08/10] trace2: clarify UTC datetime formatting Jeff Hostetler via GitGitGadget
` (4 subsequent siblings)
10 siblings, 1 reply; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Teach git to read the system and global config files for
default Trace2 settings. This allows system-wide Trace2 settings to
be installed and inherited to make it easier to manage a collection of
systems.
The original GIT_TR2* environment variables are loaded afterwards and
can be used to override the system settings.
Only the system and global config files are used. Repo and worktree
local config files are ignored. Likewise, the "-c" command line
arguments are also ignored. These limits are for performance reasons.
(1) For users not using Trace2, there should be minimal overhead to
detect that Trace2 is not enabled. In particular, Trace2 should not
allocate lots of otherwise unused data strucutres.
(2) For accurate performance measurements, Trace2 should be initialized
as early in the git process as possible, and before most of the normal
git process initialization (which involves discovering the .git directory
and reading a hierarchy of config files).
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Makefile | 1 +
t/t0210-trace2-normal.sh | 49 +++++++++++++--
t/t0211-trace2-perf.sh | 31 ++++++++--
t/t0212-trace2-event.sh | 42 +++++++++++--
trace2.c | 4 ++
trace2.h | 12 ++--
trace2/tr2_cfg.c | 7 +--
trace2/tr2_dst.c | 26 ++++----
trace2/tr2_dst.h | 3 +-
trace2/tr2_sysenv.c | 127 +++++++++++++++++++++++++++++++++++++++
trace2/tr2_sysenv.h | 36 +++++++++++
trace2/tr2_tgt_event.c | 46 +++++++-------
trace2/tr2_tgt_normal.c | 16 ++---
trace2/tr2_tgt_perf.c | 16 ++---
14 files changed, 340 insertions(+), 76 deletions(-)
create mode 100644 trace2/tr2_sysenv.c
create mode 100644 trace2/tr2_sysenv.h
diff --git a/Makefile b/Makefile
index 3e03290d8f..9ddfa3dfe7 100644
--- a/Makefile
+++ b/Makefile
@@ -1005,6 +1005,7 @@ LIB_OBJS += trace2/tr2_cfg.o
LIB_OBJS += trace2/tr2_cmd_name.o
LIB_OBJS += trace2/tr2_dst.o
LIB_OBJS += trace2/tr2_sid.o
+LIB_OBJS += trace2/tr2_sysenv.o
LIB_OBJS += trace2/tr2_tbuf.o
LIB_OBJS += trace2/tr2_tgt_event.o
LIB_OBJS += trace2/tr2_tgt_normal.o
diff --git a/t/t0210-trace2-normal.sh b/t/t0210-trace2-normal.sh
index 03a0aedb1d..8d17e1e6f1 100755
--- a/t/t0210-trace2-normal.sh
+++ b/t/t0210-trace2-normal.sh
@@ -3,6 +3,11 @@
test_description='test trace2 facility (normal target)'
. ./test-lib.sh
+# Turn off any inherited trace2 settings for this test.
+sane_unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
+sane_unset GIT_TR2_BRIEF
+sane_unset GIT_TR2_CONFIG_PARAMS
+
# Add t/helper directory to PATH so that we can use a relative
# path to run nested instances of test-tool.exe (see 004child).
# This helps with HEREDOC comparisons later.
@@ -15,11 +20,6 @@ PATH="$TTDIR:$PATH" && export PATH
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
-# Turn off any inherited trace2 settings for this test.
-unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-unset GIT_TR2_BRIEF
-unset GIT_TR2_CONFIG_PARAMS
-
V=$(git version | sed -e 's/^git version //') && export V
# There are multiple trace2 targets: normal, perf, and event.
@@ -132,4 +132,43 @@ test_expect_success 'normal stream, error event' '
test_cmp expect actual
'
+sane_unset GIT_TR2_BRIEF
+
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
+
+test_expect_success 'using global config, normal stream, return code 0' '
+ test_when_finished "rm trace.normal actual expect" &&
+ test_config_global trace2.normalBrief 1 &&
+ test_config_global trace2.normalTarget "$(pwd)/trace.normal" &&
+ test-tool trace2 001return 0 &&
+ perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+ cat >expect <<-EOF &&
+ version $V
+ start _EXE_ trace2 001return 0
+ cmd_name trace2 (trace2)
+ exit elapsed:_TIME_ code:0
+ atexit elapsed:_TIME_ code:0
+ EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'using global config with include' '
+ test_when_finished "rm trace.normal actual expect real.gitconfig" &&
+ test_config_global trace2.normalBrief 1 &&
+ test_config_global trace2.normalTarget "$(pwd)/trace.normal" &&
+ mv "$(pwd)/.gitconfig" "$(pwd)/real.gitconfig" &&
+ test_config_global include.path "$(pwd)/real.gitconfig" &&
+ test-tool trace2 001return 0 &&
+ perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+ cat >expect <<-EOF &&
+ version $V
+ start _EXE_ trace2 001return 0
+ cmd_name trace2 (trace2)
+ exit elapsed:_TIME_ code:0
+ atexit elapsed:_TIME_ code:0
+ EOF
+ test_cmp expect actual
+'
+
test_done
diff --git a/t/t0211-trace2-perf.sh b/t/t0211-trace2-perf.sh
index c9694b29f7..b501e867af 100755
--- a/t/t0211-trace2-perf.sh
+++ b/t/t0211-trace2-perf.sh
@@ -3,6 +3,11 @@
test_description='test trace2 facility (perf target)'
. ./test-lib.sh
+# Turn off any inherited trace2 settings for this test.
+sane_unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
+sane_unset GIT_TR2_PERF_BRIEF
+sane_unset GIT_TR2_CONFIG_PARAMS
+
# Add t/helper directory to PATH so that we can use a relative
# path to run nested instances of test-tool.exe (see 004child).
# This helps with HEREDOC comparisons later.
@@ -15,11 +20,6 @@ PATH="$TTDIR:$PATH" && export PATH
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
-# Turn off any inherited trace2 settings for this test.
-unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-unset GIT_TR2_PERF_BRIEF
-unset GIT_TR2_CONFIG_PARAMS
-
V=$(git version | sed -e 's/^git version //') && export V
# There are multiple trace2 targets: normal, perf, and event.
@@ -150,4 +150,25 @@ test_expect_success 'perf stream, child processes' '
test_cmp expect actual
'
+sane_unset GIT_TR2_PERF_BRIEF
+
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
+
+test_expect_success 'using global config, perf stream, return code 0' '
+ test_when_finished "rm trace.perf actual expect" &&
+ test_config_global trace2.perfBrief 1 &&
+ test_config_global trace2.perfTarget "$(pwd)/trace.perf" &&
+ test-tool trace2 001return 0 &&
+ perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
+ cat >expect <<-EOF &&
+ d0|main|version|||||$V
+ d0|main|start||_T_ABS_|||_EXE_ trace2 001return 0
+ d0|main|cmd_name|||||trace2 (trace2)
+ d0|main|exit||_T_ABS_|||code:0
+ d0|main|atexit||_T_ABS_|||code:0
+ EOF
+ test_cmp expect actual
+'
+
test_done
diff --git a/t/t0212-trace2-event.sh b/t/t0212-trace2-event.sh
index 028b6c5671..59adae8123 100755
--- a/t/t0212-trace2-event.sh
+++ b/t/t0212-trace2-event.sh
@@ -3,6 +3,11 @@
test_description='test trace2 facility'
. ./test-lib.sh
+# Turn off any inherited trace2 settings for this test.
+sane_unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
+sane_unset GIT_TR2_BARE
+sane_unset GIT_TR2_CONFIG_PARAMS
+
perl -MJSON::PP -e 0 >/dev/null 2>&1 && test_set_prereq JSON_PP
# Add t/helper directory to PATH so that we can use a relative
@@ -17,11 +22,6 @@ PATH="$TTDIR:$PATH" && export PATH
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
-# Turn off any inherited trace2 settings for this test.
-unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-unset GIT_TR2_BARE
-unset GIT_TR2_CONFIG_PARAMS
-
V=$(git version | sed -e 's/^git version //') && export V
# There are multiple trace2 targets: normal, perf, and event.
@@ -233,4 +233,36 @@ test_expect_success JSON_PP 'basic trace2_data' '
test_cmp expect actual
'
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
+
+test_expect_success JSON_PP 'using global config, event stream, error event' '
+ test_when_finished "rm trace.event actual expect" &&
+ test_config_global trace2.eventTarget "$(pwd)/trace.event" &&
+ test-tool trace2 003error "hello world" "this is a test" &&
+ perl "$TEST_DIRECTORY/t0212/parse_events.perl" <trace.event >actual &&
+ sed -e "s/^|//" >expect <<-EOF &&
+ |VAR1 = {
+ | "_SID0_":{
+ | "argv":[
+ | "_EXE_",
+ | "trace2",
+ | "003error",
+ | "hello world",
+ | "this is a test"
+ | ],
+ | "errors":[
+ | "%s",
+ | "%s"
+ | ],
+ | "exit_code":0,
+ | "hierarchy":"trace2",
+ | "name":"trace2",
+ | "version":"$V"
+ | }
+ |};
+ EOF
+ test_cmp expect actual
+'
+
test_done
diff --git a/trace2.c b/trace2.c
index 1c180062dd..490b3f071e 100644
--- a/trace2.c
+++ b/trace2.c
@@ -10,6 +10,7 @@
#include "trace2/tr2_cmd_name.h"
#include "trace2/tr2_dst.h"
#include "trace2/tr2_sid.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
@@ -120,6 +121,7 @@ static void tr2main_atexit_handler(void)
tr2_sid_release();
tr2_cmd_name_release();
tr2_cfg_free_patterns();
+ tr2_sysenv_release();
trace2_enabled = 0;
}
@@ -155,6 +157,8 @@ void trace2_initialize_fl(const char *file, int line)
if (trace2_enabled)
return;
+ tr2_sysenv_load();
+
if (!tr2_tgt_want_builtins())
return;
trace2_enabled = 1;
diff --git a/trace2.h b/trace2.h
index 8f89e70c44..894bfca7e0 100644
--- a/trace2.h
+++ b/trace2.h
@@ -38,7 +38,8 @@ void trace2_initialize_clock(void);
/*
* Initialize TRACE2 tracing facility if any of the builtin TRACE2
- * targets are enabled in the environment. Emits a 'version' event.
+ * targets are enabled in the system config or the environment.
+ * Emits a 'version' event.
*
* Cleanup/Termination is handled automatically by a registered
* atexit() routine.
@@ -125,10 +126,11 @@ void trace2_cmd_alias_fl(const char *file, int line, const char *alias,
* Emit one or more 'def_param' events for "interesting" configuration
* settings.
*
- * The environment variable "GIT_TR2_CONFIG_PARAMS" can be set to a
- * list of patterns considered important. For example:
- *
- * GIT_TR2_CONFIG_PARAMS="core.*,remote.*.url"
+ * Use the TR2_SYSENV_CFG_PARAM setting to register a comma-separated
+ * list of patterns configured important. For example:
+ * git config --system trace2.configParams 'core.*,remote.*.url'
+ * or:
+ * GIT_TR2_CONFIG_PARAMS=core.*,remote.*.url"
*
* Note: this routine does a read-only iteration on the config data
* (using read_early_config()), so it must not be called until enough
diff --git a/trace2/tr2_cfg.c b/trace2/tr2_cfg.c
index b329921ac5..caa7f06948 100644
--- a/trace2/tr2_cfg.c
+++ b/trace2/tr2_cfg.c
@@ -1,8 +1,7 @@
#include "cache.h"
#include "config.h"
-#include "tr2_cfg.h"
-
-#define TR2_ENVVAR_CFG_PARAM "GIT_TR2_CONFIG_PARAMS"
+#include "trace2/tr2_cfg.h"
+#include "trace2/tr2_sysenv.h"
static struct strbuf **tr2_cfg_patterns;
static int tr2_cfg_count_patterns;
@@ -21,7 +20,7 @@ static int tr2_cfg_load_patterns(void)
return tr2_cfg_count_patterns;
tr2_cfg_loaded = 1;
- envvar = getenv(TR2_ENVVAR_CFG_PARAM);
+ envvar = tr2_sysenv_get(TR2_SYSENV_CFG_PARAM);
if (!envvar || !*envvar)
return tr2_cfg_count_patterns;
diff --git a/trace2/tr2_dst.c b/trace2/tr2_dst.c
index fd490a43ad..7d96f33420 100644
--- a/trace2/tr2_dst.c
+++ b/trace2/tr2_dst.c
@@ -1,5 +1,6 @@
#include "cache.h"
#include "trace2/tr2_dst.h"
+#include "trace2/tr2_sysenv.h"
/*
* If a Trace2 target cannot be opened for writing, we should issue a
@@ -7,17 +8,13 @@
* or socket and beyond the user's control -- especially since every
* git command (and sub-command) will print the message. So we silently
* eat these warnings and just discard the trace data.
- *
- * Enable the following environment variable to see these warnings.
*/
-#define TR2_ENVVAR_DST_DEBUG "GIT_TR2_DST_DEBUG"
-
static int tr2_dst_want_warning(void)
{
static int tr2env_dst_debug = -1;
if (tr2env_dst_debug == -1) {
- const char *env_value = getenv(TR2_ENVVAR_DST_DEBUG);
+ const char *env_value = tr2_sysenv_get(TR2_SYSENV_DST_DEBUG);
if (!env_value || !*env_value)
tr2env_dst_debug = 0;
else
@@ -42,7 +39,9 @@ static int tr2_dst_try_path(struct tr2_dst *dst, const char *tgt_value)
if (fd == -1) {
if (tr2_dst_want_warning())
warning("trace2: could not open '%s' for '%s' tracing: %s",
- tgt_value, dst->env_var_name, strerror(errno));
+ tgt_value,
+ tr2_sysenv_display_name(dst->sysenv_var),
+ strerror(errno));
tr2_dst_trace_disable(dst);
return 0;
@@ -116,7 +115,8 @@ static int tr2_dst_try_unix_domain_socket(struct tr2_dst *dst,
if (!path || !*path) {
if (tr2_dst_want_warning())
warning("trace2: invalid AF_UNIX value '%s' for '%s' tracing",
- tgt_value, dst->env_var_name);
+ tgt_value,
+ tr2_sysenv_display_name(dst->sysenv_var));
tr2_dst_trace_disable(dst);
return 0;
@@ -126,7 +126,7 @@ static int tr2_dst_try_unix_domain_socket(struct tr2_dst *dst,
strlen(path) >= sizeof(((struct sockaddr_un *)0)->sun_path)) {
if (tr2_dst_want_warning())
warning("trace2: invalid AF_UNIX path '%s' for '%s' tracing",
- path, dst->env_var_name);
+ path, tr2_sysenv_display_name(dst->sysenv_var));
tr2_dst_trace_disable(dst);
return 0;
@@ -148,7 +148,8 @@ static int tr2_dst_try_unix_domain_socket(struct tr2_dst *dst,
error:
if (tr2_dst_want_warning())
warning("trace2: could not connect to socket '%s' for '%s' tracing: %s",
- path, dst->env_var_name, strerror(e));
+ path, tr2_sysenv_display_name(dst->sysenv_var),
+ strerror(e));
tr2_dst_trace_disable(dst);
return 0;
@@ -168,7 +169,7 @@ static void tr2_dst_malformed_warning(struct tr2_dst *dst,
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf, "trace2: unknown value for '%s': '%s'",
- dst->env_var_name, tgt_value);
+ tr2_sysenv_display_name(dst->sysenv_var), tgt_value);
warning("%s", buf.buf);
strbuf_release(&buf);
@@ -184,7 +185,7 @@ int tr2_dst_get_trace_fd(struct tr2_dst *dst)
dst->initialized = 1;
- tgt_value = getenv(dst->env_var_name);
+ tgt_value = tr2_sysenv_get(dst->sysenv_var);
if (!tgt_value || !strcmp(tgt_value, "") || !strcmp(tgt_value, "0") ||
!strcasecmp(tgt_value, "false")) {
@@ -246,7 +247,8 @@ void tr2_dst_write_line(struct tr2_dst *dst, struct strbuf *buf_line)
return;
if (tr2_dst_want_warning())
- warning("unable to write trace to '%s': %s", dst->env_var_name,
+ warning("unable to write trace to '%s': %s",
+ tr2_sysenv_display_name(dst->sysenv_var),
strerror(errno));
tr2_dst_trace_disable(dst);
}
diff --git a/trace2/tr2_dst.h b/trace2/tr2_dst.h
index 9a64f05b02..3adf3bac13 100644
--- a/trace2/tr2_dst.h
+++ b/trace2/tr2_dst.h
@@ -2,9 +2,10 @@
#define TR2_DST_H
struct strbuf;
+#include "trace2/tr2_sysenv.h"
struct tr2_dst {
- const char *const env_var_name;
+ enum tr2_sysenv_variable sysenv_var;
int fd;
unsigned int initialized : 1;
unsigned int need_close : 1;
diff --git a/trace2/tr2_sysenv.c b/trace2/tr2_sysenv.c
new file mode 100644
index 0000000000..9025b86303
--- /dev/null
+++ b/trace2/tr2_sysenv.c
@@ -0,0 +1,127 @@
+#include "cache.h"
+#include "config.h"
+#include "dir.h"
+#include "tr2_sysenv.h"
+
+/*
+ * Each entry represents a trace2 setting.
+ * See Documentation/technical/api-trace2.txt
+ */
+struct tr2_sysenv_entry {
+ const char *env_var_name;
+ const char *git_config_name;
+
+ char *value;
+ unsigned int getenv_called : 1;
+};
+
+/*
+ * This table must match "enum tr2_sysenv_variable" in tr2_sysenv.h.
+ *
+ * The strings in this table are constant and must match the published
+ * config and environment variable names as described in the documentation.
+ *
+ * We do not define entries for the GIT_TR2_PARENT_* environment
+ * variables because they are transient and used to pass information
+ * from parent to child git processes, rather than settings.
+ */
+/* clang-format off */
+static struct tr2_sysenv_entry tr2_sysenv_settings[] = {
+ [TR2_SYSENV_CFG_PARAM] = { "GIT_TR2_CONFIG_PARAMS",
+ "trace2.configparams" },
+
+ [TR2_SYSENV_DST_DEBUG] = { "GIT_TR2_DST_DEBUG",
+ "trace2.destinationdebug" },
+
+ [TR2_SYSENV_NORMAL] = { "GIT_TR2",
+ "trace2.normaltarget" },
+ [TR2_SYSENV_NORMAL_BRIEF] = { "GIT_TR2_BRIEF",
+ "trace2.normalbrief" },
+
+ [TR2_SYSENV_EVENT] = { "GIT_TR2_EVENT",
+ "trace2.eventtarget" },
+ [TR2_SYSENV_EVENT_BRIEF] = { "GIT_TR2_EVENT_BRIEF",
+ "trace2.eventbrief" },
+ [TR2_SYSENV_EVENT_NESTING] = { "GIT_TR2_EVENT_NESTING",
+ "trace2.eventnesting" },
+
+ [TR2_SYSENV_PERF] = { "GIT_TR2_PERF",
+ "trace2.perftarget" },
+ [TR2_SYSENV_PERF_BRIEF] = { "GIT_TR2_PERF_BRIEF",
+ "trace2.perfbrief" },
+};
+/* clang-format on */
+
+static int tr2_sysenv_cb(const char *key, const char *value, void *d)
+{
+ int k;
+
+ if (!starts_with(key, "trace2."))
+ return 0;
+
+ for (k = 0; k < ARRAY_SIZE(tr2_sysenv_settings); k++) {
+ if (!strcmp(key, tr2_sysenv_settings[k].git_config_name)) {
+ free(tr2_sysenv_settings[k].value);
+ tr2_sysenv_settings[k].value = xstrdup(value);
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Load Trace2 settings from the system config (usually "/etc/gitconfig"
+ * unless we were built with a runtime-prefix). These are intended to
+ * define the default values for Trace2 as requested by the administrator.
+ *
+ * Then override with the Trace2 settings from the global config.
+ */
+void tr2_sysenv_load(void)
+{
+ if (ARRAY_SIZE(tr2_sysenv_settings) != TR2_SYSENV_MUST_BE_LAST)
+ BUG("tr2_sysenv_settings size is wrong");
+
+ read_very_early_config(tr2_sysenv_cb, NULL);
+}
+
+/*
+ * Return the value for the requested Trace2 setting from these sources:
+ * the system config, the global config, and the environment.
+ */
+const char *tr2_sysenv_get(enum tr2_sysenv_variable var)
+{
+ if (var >= TR2_SYSENV_MUST_BE_LAST)
+ BUG("tr2_sysenv_get invalid var '%d'", var);
+
+ if (!tr2_sysenv_settings[var].getenv_called) {
+ const char *v = getenv(tr2_sysenv_settings[var].env_var_name);
+ if (v && *v) {
+ free(tr2_sysenv_settings[var].value);
+ tr2_sysenv_settings[var].value = xstrdup(v);
+ }
+ tr2_sysenv_settings[var].getenv_called = 1;
+ }
+
+ return tr2_sysenv_settings[var].value;
+}
+
+/*
+ * Return a friendly name for this setting that is suitable for printing
+ * in an error messages.
+ */
+const char *tr2_sysenv_display_name(enum tr2_sysenv_variable var)
+{
+ if (var >= TR2_SYSENV_MUST_BE_LAST)
+ BUG("tr2_sysenv_get invalid var '%d'", var);
+
+ return tr2_sysenv_settings[var].env_var_name;
+}
+
+void tr2_sysenv_release(void)
+{
+ int k;
+
+ for (k = 0; k < ARRAY_SIZE(tr2_sysenv_settings); k++)
+ free(tr2_sysenv_settings[k].value);
+}
diff --git a/trace2/tr2_sysenv.h b/trace2/tr2_sysenv.h
new file mode 100644
index 0000000000..369b20bd87
--- /dev/null
+++ b/trace2/tr2_sysenv.h
@@ -0,0 +1,36 @@
+#ifndef TR2_SYSENV_H
+#define TR2_SYSENV_H
+
+/*
+ * The Trace2 settings that can be loaded from /etc/gitconfig
+ * and/or user environment variables.
+ *
+ * Note that this set does not contain any of the transient
+ * environment variables used to pass information from parent
+ * to child git processes, such "GIT_TR2_PARENT_SID".
+ */
+enum tr2_sysenv_variable {
+ TR2_SYSENV_CFG_PARAM = 0,
+
+ TR2_SYSENV_DST_DEBUG,
+
+ TR2_SYSENV_NORMAL,
+ TR2_SYSENV_NORMAL_BRIEF,
+
+ TR2_SYSENV_EVENT,
+ TR2_SYSENV_EVENT_BRIEF,
+ TR2_SYSENV_EVENT_NESTING,
+
+ TR2_SYSENV_PERF,
+ TR2_SYSENV_PERF_BRIEF,
+
+ TR2_SYSENV_MUST_BE_LAST
+};
+
+void tr2_sysenv_load(void);
+
+const char *tr2_sysenv_get(enum tr2_sysenv_variable);
+const char *tr2_sysenv_display_name(enum tr2_sysenv_variable var);
+void tr2_sysenv_release(void);
+
+#endif /* TR2_SYSENV_H */
diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
index 89a4d3ae9a..48d9193b2c 100644
--- a/trace2/tr2_tgt_event.c
+++ b/trace2/tr2_tgt_event.c
@@ -6,10 +6,11 @@
#include "trace2/tr2_dst.h"
#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_sid.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
-static struct tr2_dst tr2dst_event = { "GIT_TR2_EVENT", 0, 0, 0 };
+static struct tr2_dst tr2dst_event = { TR2_SYSENV_EVENT, 0, 0, 0 };
/*
* The version number of the JSON data generated by the EVENT target
@@ -28,37 +29,36 @@ static struct tr2_dst tr2dst_event = { "GIT_TR2_EVENT", 0, 0, 0 };
* are primarily intended for the performance target during debugging.
*
* Some of the outer-most messages, however, may be of interest to the
- * event target. Set this environment variable to a larger integer for
- * more detail in the event target.
+ * event target. Use the TR2_SYSENV_EVENT_NESTING setting to increase
+ * region details in the event target.
*/
-#define TR2_ENVVAR_EVENT_NESTING "GIT_TR2_EVENT_NESTING"
-static int tr2env_event_nesting_wanted = 2;
+static int tr2env_event_max_nesting_levels = 2;
/*
- * Set this environment variable to true to omit the <time>, <file>, and
+ * Use the TR2_SYSENV_EVENT_BRIEF to omit the <time>, <file>, and
* <line> fields from most events.
*/
-#define TR2_ENVVAR_EVENT_BRIEF "GIT_TR2_EVENT_BRIEF"
-static int tr2env_event_brief;
+static int tr2env_event_be_brief;
static int fn_init(void)
{
int want = tr2_dst_trace_want(&tr2dst_event);
- int want_nesting;
+ int max_nesting;
int want_brief;
- char *nesting;
- char *brief;
+ const char *nesting;
+ const char *brief;
if (!want)
return want;
- nesting = getenv(TR2_ENVVAR_EVENT_NESTING);
- if (nesting && ((want_nesting = atoi(nesting)) > 0))
- tr2env_event_nesting_wanted = want_nesting;
+ nesting = tr2_sysenv_get(TR2_SYSENV_EVENT_NESTING);
+ if (nesting && *nesting && ((max_nesting = atoi(nesting)) > 0))
+ tr2env_event_max_nesting_levels = max_nesting;
- brief = getenv(TR2_ENVVAR_EVENT_BRIEF);
- if (brief && ((want_brief = atoi(brief)) > 0))
- tr2env_event_brief = want_brief;
+ brief = tr2_sysenv_get(TR2_SYSENV_EVENT_BRIEF);
+ if (brief && *brief &&
+ ((want_brief = git_parse_maybe_bool(brief)) != -1))
+ tr2env_event_be_brief = want_brief;
return want;
}
@@ -92,13 +92,13 @@ static void event_fmt_prepare(const char *event_name, const char *file,
/*
* In brief mode, only emit <time> on these 2 event types.
*/
- if (!tr2env_event_brief || !strcmp(event_name, "version") ||
+ if (!tr2env_event_be_brief || !strcmp(event_name, "version") ||
!strcmp(event_name, "atexit")) {
tr2_tbuf_utc_time(&tb_now);
jw_object_string(jw, "time", tb_now.buf);
}
- if (!tr2env_event_brief && file && *file) {
+ if (!tr2env_event_be_brief && file && *file) {
jw_object_string(jw, "file", file);
jw_object_intmax(jw, "line", line);
}
@@ -459,7 +459,7 @@ static void fn_region_enter_printf_va_fl(const char *file, int line,
{
const char *event_name = "region_enter";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
jw_object_begin(&jw, 0);
@@ -484,7 +484,7 @@ static void fn_region_leave_printf_va_fl(
{
const char *event_name = "region_leave";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
double t_rel = (double)us_elapsed_region / 1000000.0;
@@ -511,7 +511,7 @@ static void fn_data_fl(const char *file, int line, uint64_t us_elapsed_absolute,
{
const char *event_name = "data";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
double t_abs = (double)us_elapsed_absolute / 1000000.0;
double t_rel = (double)us_elapsed_region / 1000000.0;
@@ -539,7 +539,7 @@ static void fn_data_json_fl(const char *file, int line,
{
const char *event_name = "data_json";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
double t_abs = (double)us_elapsed_absolute / 1000000.0;
double t_rel = (double)us_elapsed_region / 1000000.0;
diff --git a/trace2/tr2_tgt_normal.c b/trace2/tr2_tgt_normal.c
index 57f3e18f5b..1ce6f97863 100644
--- a/trace2/tr2_tgt_normal.c
+++ b/trace2/tr2_tgt_normal.c
@@ -4,20 +4,20 @@
#include "quote.h"
#include "version.h"
#include "trace2/tr2_dst.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
-static struct tr2_dst tr2dst_normal = { "GIT_TR2", 0, 0, 0 };
+static struct tr2_dst tr2dst_normal = { TR2_SYSENV_NORMAL, 0, 0, 0 };
/*
- * Set this environment variable to true to omit the "<time> <file>:<line>"
+ * Use the TR2_SYSENV_NORMAL_BRIEF setting to omit the "<time> <file>:<line>"
* fields from each line written to the builtin normal target.
*
* Unit tests may want to use this to help with testing.
*/
-#define TR2_ENVVAR_NORMAL_BRIEF "GIT_TR2_BRIEF"
-static int tr2env_normal_brief;
+static int tr2env_normal_be_brief;
#define TR2FMT_NORMAL_FL_WIDTH (50)
@@ -25,15 +25,15 @@ static int fn_init(void)
{
int want = tr2_dst_trace_want(&tr2dst_normal);
int want_brief;
- char *brief;
+ const char *brief;
if (!want)
return want;
- brief = getenv(TR2_ENVVAR_NORMAL_BRIEF);
+ brief = tr2_sysenv_get(TR2_SYSENV_NORMAL_BRIEF);
if (brief && *brief &&
((want_brief = git_parse_maybe_bool(brief)) != -1))
- tr2env_normal_brief = want_brief;
+ tr2env_normal_be_brief = want_brief;
return want;
}
@@ -47,7 +47,7 @@ static void normal_fmt_prepare(const char *file, int line, struct strbuf *buf)
{
strbuf_setlen(buf, 0);
- if (!tr2env_normal_brief) {
+ if (!tr2env_normal_be_brief) {
struct tr2_tbuf tb_now;
tr2_tbuf_local_time(&tb_now);
diff --git a/trace2/tr2_tgt_perf.c b/trace2/tr2_tgt_perf.c
index 9c3b4d8a0f..328d2234bd 100644
--- a/trace2/tr2_tgt_perf.c
+++ b/trace2/tr2_tgt_perf.c
@@ -6,20 +6,20 @@
#include "json-writer.h"
#include "trace2/tr2_dst.h"
#include "trace2/tr2_sid.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
-static struct tr2_dst tr2dst_perf = { "GIT_TR2_PERF", 0, 0, 0 };
+static struct tr2_dst tr2dst_perf = { TR2_SYSENV_PERF, 0, 0, 0 };
/*
- * Set this environment variable to true to omit the "<time> <file>:<line>"
+ * Use TR2_SYSENV_PERF_BRIEF to omit the "<time> <file>:<line>"
* fields from each line written to the builtin performance target.
*
* Unit tests may want to use this to help with testing.
*/
-#define TR2_ENVVAR_PERF_BRIEF "GIT_TR2_PERF_BRIEF"
-static int tr2env_perf_brief;
+static int tr2env_perf_be_brief;
#define TR2FMT_PERF_FL_WIDTH (50)
#define TR2FMT_PERF_MAX_EVENT_NAME (12)
@@ -36,17 +36,17 @@ static int fn_init(void)
{
int want = tr2_dst_trace_want(&tr2dst_perf);
int want_brief;
- char *brief;
+ const char *brief;
if (!want)
return want;
strbuf_addchars(&dots, '.', TR2_DOTS_BUFFER_SIZE);
- brief = getenv(TR2_ENVVAR_PERF_BRIEF);
+ brief = tr2_sysenv_get(TR2_SYSENV_PERF_BRIEF);
if (brief && *brief &&
((want_brief = git_parse_maybe_bool(brief)) != -1))
- tr2env_perf_brief = want_brief;
+ tr2env_perf_be_brief = want_brief;
return want;
}
@@ -77,7 +77,7 @@ static void perf_fmt_prepare(const char *event_name,
strbuf_setlen(buf, 0);
- if (!tr2env_perf_brief) {
+ if (!tr2env_perf_be_brief) {
struct tr2_tbuf tb_now;
tr2_tbuf_local_time(&tb_now);
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* Re: [PATCH v4 06/10] trace2: use system/global config for default trace2 settings
2019-04-15 20:39 ` [PATCH v4 06/10] trace2: use system/global config for default trace2 settings Jeff Hostetler via GitGitGadget
@ 2019-04-27 13:43 ` SZEDER Gábor
2019-04-29 19:03 ` Jeff Hostetler
0 siblings, 1 reply; 68+ messages in thread
From: SZEDER Gábor @ 2019-04-27 13:43 UTC (permalink / raw)
To: Jeff Hostetler via GitGitGadget
Cc: git, gitster, peff, jrnieder, steadmon, avarab, Jeff Hostetler
On Mon, Apr 15, 2019 at 01:39:47PM -0700, Jeff Hostetler via GitGitGadget wrote:
> From: Jeff Hostetler <jeffhost@microsoft.com>
>
> Teach git to read the system and global config files for
> default Trace2 settings. This allows system-wide Trace2 settings to
> be installed and inherited to make it easier to manage a collection of
> systems.
>
> The original GIT_TR2* environment variables are loaded afterwards and
> can be used to override the system settings.
>
> Only the system and global config files are used. Repo and worktree
> local config files are ignored. Likewise, the "-c" command line
> arguments are also ignored. These limits are for performance reasons.
>
> (1) For users not using Trace2, there should be minimal overhead to
> detect that Trace2 is not enabled. In particular, Trace2 should not
> allocate lots of otherwise unused data strucutres.
>
> (2) For accurate performance measurements, Trace2 should be initialized
> as early in the git process as possible, and before most of the normal
> git process initialization (which involves discovering the .git directory
> and reading a hierarchy of config files).
Reading the configuration that early causes unexpected and undesired
behavior change:
$ sudo chmod a-rwx /usr/local/etc/gitconfig
$ ./BUILDS/v2.21.0/bin/git
usage: git [--version] [--help] [-C <path>] [-c <name>=<value>]
<... snip rest of usage ...>
$ strace ./BUILDS/v2.21.0/bin/git 2>&1 |grep config -c
0
$ ./git
fatal: unable to access '/usr/local/etc/gitconfig': Permission denied
$ ./git --version
fatal: unable to access '/usr/local/etc/gitconfig': Permission denied
I think at least 'git', 'git --help', and 'git --version' should Just
Work, no matter what.
This breaks the 32 bit Linux build job on Travis CI, because:
- In the 32 bit Docker image we change UID from root to regular user
while preserving the environment, including $HOME.
- Since $HOME is the default build prefix, Git will look for the
system-wide configuration under '/root/etc/gitconfig', which fails
as a regular user.
- Our test harness checks early (i.e. earlier than setting
GIT_CONFIG_NOSYSTEM=1) whether Git has been built successfully by
attempting to run '$GIT_BUILD_DIR}/git', which fails because of
the inaccessible system-wide config file, and in turn the harness
assumes that Git hasn't been built and aborts.
https://travis-ci.org/git/git/jobs/524403682#L1258
^ permalink raw reply [flat|nested] 68+ messages in thread
* Re: [PATCH v4 06/10] trace2: use system/global config for default trace2 settings
2019-04-27 13:43 ` SZEDER Gábor
@ 2019-04-29 19:03 ` Jeff Hostetler
0 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler @ 2019-04-29 19:03 UTC (permalink / raw)
To: SZEDER Gábor, Jeff Hostetler via GitGitGadget
Cc: git, gitster, peff, jrnieder, steadmon, avarab, Jeff Hostetler
On 4/27/2019 9:43 AM, SZEDER Gábor wrote:
> On Mon, Apr 15, 2019 at 01:39:47PM -0700, Jeff Hostetler via GitGitGadget wrote:
>> From: Jeff Hostetler <jeffhost@microsoft.com>
>>
>> Teach git to read the system and global config files for
>> default Trace2 settings. This allows system-wide Trace2 settings to
>> be installed and inherited to make it easier to manage a collection of
>> systems.
>>
>> The original GIT_TR2* environment variables are loaded afterwards and
>> can be used to override the system settings.
>>
>> Only the system and global config files are used. Repo and worktree
>> local config files are ignored. Likewise, the "-c" command line
>> arguments are also ignored. These limits are for performance reasons.
>>
>> (1) For users not using Trace2, there should be minimal overhead to
>> detect that Trace2 is not enabled. In particular, Trace2 should not
>> allocate lots of otherwise unused data strucutres.
>>
>> (2) For accurate performance measurements, Trace2 should be initialized
>> as early in the git process as possible, and before most of the normal
>> git process initialization (which involves discovering the .git directory
>> and reading a hierarchy of config files).
>
> Reading the configuration that early causes unexpected and undesired
> behavior change:
>
> $ sudo chmod a-rwx /usr/local/etc/gitconfig
> $ ./BUILDS/v2.21.0/bin/git
> usage: git [--version] [--help] [-C <path>] [-c <name>=<value>]
> <... snip rest of usage ...>
> $ strace ./BUILDS/v2.21.0/bin/git 2>&1 |grep config -c
> 0
> $ ./git
> fatal: unable to access '/usr/local/etc/gitconfig': Permission denied
> $ ./git --version
> fatal: unable to access '/usr/local/etc/gitconfig': Permission denied
>
> I think at least 'git', 'git --help', and 'git --version' should Just
> Work, no matter what.
>
>
> This breaks the 32 bit Linux build job on Travis CI, because:
>
> - In the 32 bit Docker image we change UID from root to regular user
> while preserving the environment, including $HOME.
>
> - Since $HOME is the default build prefix, Git will look for the
> system-wide configuration under '/root/etc/gitconfig', which fails
> as a regular user.
>
> - Our test harness checks early (i.e. earlier than setting
> GIT_CONFIG_NOSYSTEM=1) whether Git has been built successfully by
> attempting to run '$GIT_BUILD_DIR}/git', which fails because of
> the inaccessible system-wide config file, and in turn the harness
> assumes that Git hasn't been built and aborts.
>
> https://travis-ci.org/git/git/jobs/524403682#L1258
>
It appears that config.c:do_git_config_sequence() passes flags = 0
to access_or_die() rather than ACCESS_EACCES_OK as it does for the
other scopes. This causes the fatal error, rather than ignoring the
problem.
Reasons for this were discussed in:
4698c8feb1 config: allow inaccessible configuration under $HOME
I'll push a fix shortly.
Thanks
Jeff
^ permalink raw reply [flat|nested] 68+ messages in thread
* [PATCH v4 08/10] trace2: clarify UTC datetime formatting
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
` (5 preceding siblings ...)
2019-04-15 20:39 ` [PATCH v4 06/10] trace2: use system/global config for default trace2 settings Jeff Hostetler via GitGitGadget
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 07/10] trace2: report peak memory usage of the process Jeff Hostetler via GitGitGadget
` (3 subsequent siblings)
10 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Update tr2_tbuf_utc_datetime to generate extended UTC format.
Update tr2_tgt_event target to use extended format in 'time' columns.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 12 ++++++------
trace2/tr2_tbuf.c | 4 ++--
trace2/tr2_tbuf.h | 4 ++--
trace2/tr2_tgt_event.c | 2 +-
4 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index baaa1153bb..cdc00bcc5d 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -78,11 +78,11 @@ git version 2.20.1.155.g426c96fcdb
+
------------
$ cat ~/log.event
-{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.620713","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621027","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
-{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621122","file":"git.c","line":432,"name":"version","hierarchy":"version"}
-{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621236","file":"git.c","line":662,"t_abs":0.001227,"code":0}
-{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621268","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
+{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
+{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
+{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
+{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
+{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
------------
== Enabling a Target
@@ -542,7 +542,7 @@ The following key/value pairs are common to all events:
"event":"version",
"sid":"1547659722619736-11614",
"thread":"main",
- "time":"2019-01-16 17:28:42.620713",
+ "time":"2019-01-16T17:28:42.620713Z",
"file":"common-main.c",
"line":38,
...
diff --git a/trace2/tr2_tbuf.c b/trace2/tr2_tbuf.c
index 0844910423..eb1b240d8a 100644
--- a/trace2/tr2_tbuf.c
+++ b/trace2/tr2_tbuf.c
@@ -15,7 +15,7 @@ void tr2_tbuf_local_time(struct tr2_tbuf *tb)
tm.tm_min, tm.tm_sec, (long)tv.tv_usec);
}
-void tr2_tbuf_utc_time(struct tr2_tbuf *tb)
+void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb)
{
struct timeval tv;
struct tm tm;
@@ -26,7 +26,7 @@ void tr2_tbuf_utc_time(struct tr2_tbuf *tb)
gmtime_r(&secs, &tm);
xsnprintf(tb->buf, sizeof(tb->buf),
- "%4d-%02d-%02d %02d:%02d:%02d.%06ld", tm.tm_year + 1900,
+ "%4d-%02d-%02dT%02d:%02d:%02d.%06ldZ", tm.tm_year + 1900,
tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec,
(long)tv.tv_usec);
}
diff --git a/trace2/tr2_tbuf.h b/trace2/tr2_tbuf.h
index 9cdefa3957..2a1d173ff2 100644
--- a/trace2/tr2_tbuf.h
+++ b/trace2/tr2_tbuf.h
@@ -16,8 +16,8 @@ struct tr2_tbuf {
void tr2_tbuf_local_time(struct tr2_tbuf *tb);
/*
- * Fill buffer with formatted UTC time string.
+ * Fill buffer with formatted UTC datatime string.
*/
-void tr2_tbuf_utc_time(struct tr2_tbuf *tb);
+void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb);
#endif /* TR2_TBUF_H */
diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
index 48d9193b2c..2c97cf54be 100644
--- a/trace2/tr2_tgt_event.c
+++ b/trace2/tr2_tgt_event.c
@@ -94,7 +94,7 @@ static void event_fmt_prepare(const char *event_name, const char *file,
*/
if (!tr2env_event_be_brief || !strcmp(event_name, "version") ||
!strcmp(event_name, "atexit")) {
- tr2_tbuf_utc_time(&tb_now);
+ tr2_tbuf_utc_datetime_extended(&tb_now);
jw_object_string(jw, "time", tb_now.buf);
}
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v4 07/10] trace2: report peak memory usage of the process
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
` (6 preceding siblings ...)
2019-04-15 20:39 ` [PATCH v4 08/10] trace2: clarify UTC datetime formatting Jeff Hostetler via GitGitGadget
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 09/10] trace2: make SIDs more unique Jeff Hostetler via GitGitGadget
` (2 subsequent siblings)
10 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Teach Windows version of git to report peak memory usage
during exit() processing.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
common-main.c | 2 +-
compat/win32/trace2_win32_process_info.c | 50 ++++++++++++++++++++++--
trace2.c | 2 +
trace2.h | 14 +++++--
4 files changed, 60 insertions(+), 8 deletions(-)
diff --git a/common-main.c b/common-main.c
index 299ca62a72..582a7b1886 100644
--- a/common-main.c
+++ b/common-main.c
@@ -41,7 +41,7 @@ int main(int argc, const char **argv)
trace2_initialize();
trace2_cmd_start(argv);
- trace2_collect_process_info();
+ trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP);
git_setup_gettext();
diff --git a/compat/win32/trace2_win32_process_info.c b/compat/win32/trace2_win32_process_info.c
index 52bd62034b..8ccbd1c2c6 100644
--- a/compat/win32/trace2_win32_process_info.c
+++ b/compat/win32/trace2_win32_process_info.c
@@ -1,5 +1,6 @@
#include "../../cache.h"
#include "../../json-writer.h"
+#include "lazyload.h"
#include <Psapi.h>
#include <tlHelp32.h>
@@ -137,11 +138,54 @@ static void get_is_being_debugged(void)
"windows/debugger_present", 1);
}
-void trace2_collect_process_info(void)
+/*
+ * Emit JSON data with the peak memory usage of the current process.
+ */
+static void get_peak_memory_info(void)
+{
+ DECLARE_PROC_ADDR(psapi.dll, BOOL, GetProcessMemoryInfo, HANDLE,
+ PPROCESS_MEMORY_COUNTERS, DWORD);
+
+ if (INIT_PROC_ADDR(GetProcessMemoryInfo)) {
+ PROCESS_MEMORY_COUNTERS pmc;
+
+ if (GetProcessMemoryInfo(GetCurrentProcess(), &pmc,
+ sizeof(pmc))) {
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+
+#define KV(kv) #kv, (intmax_t)pmc.kv
+
+ jw_object_intmax(&jw, KV(PageFaultCount));
+ jw_object_intmax(&jw, KV(PeakWorkingSetSize));
+ jw_object_intmax(&jw, KV(PeakPagefileUsage));
+
+ jw_end(&jw);
+
+ trace2_data_json("process", the_repository,
+ "windows/memory", &jw);
+ jw_release(&jw);
+ }
+ }
+}
+
+void trace2_collect_process_info(enum trace2_process_info_reason reason)
{
if (!trace2_is_enabled())
return;
- get_is_being_debugged();
- get_ancestry();
+ switch (reason) {
+ case TRACE2_PROCESS_INFO_STARTUP:
+ get_is_being_debugged();
+ get_ancestry();
+ return;
+
+ case TRACE2_PROCESS_INFO_EXIT:
+ get_peak_memory_info();
+ return;
+
+ default:
+ BUG("trace2_collect_process_info: unknown reason '%d'", reason);
+ }
}
diff --git a/trace2.c b/trace2.c
index 490b3f071e..6baa65cdf9 100644
--- a/trace2.c
+++ b/trace2.c
@@ -213,6 +213,8 @@ int trace2_cmd_exit_fl(const char *file, int line, int code)
if (!trace2_enabled)
return code;
+ trace2_collect_process_info(TRACE2_PROCESS_INFO_EXIT);
+
tr2main_exit_code = code;
us_now = getnanotime() / 1000;
diff --git a/trace2.h b/trace2.h
index 894bfca7e0..888531eb08 100644
--- a/trace2.h
+++ b/trace2.h
@@ -391,13 +391,19 @@ void trace2_printf(const char *fmt, ...);
* Optional platform-specific code to dump information about the
* current and any parent process(es). This is intended to allow
* post-processors to know who spawned this git instance and anything
- * else the platform may be able to tell us about the current process.
+ * else that the platform may be able to tell us about the current process.
*/
+
+enum trace2_process_info_reason {
+ TRACE2_PROCESS_INFO_STARTUP,
+ TRACE2_PROCESS_INFO_EXIT,
+};
+
#if defined(GIT_WINDOWS_NATIVE)
-void trace2_collect_process_info(void);
+void trace2_collect_process_info(enum trace2_process_info_reason reason);
#else
-#define trace2_collect_process_info() \
- do { \
+#define trace2_collect_process_info(reason) \
+ do { \
} while (0)
#endif
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v4 09/10] trace2: make SIDs more unique
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
` (7 preceding siblings ...)
2019-04-15 20:39 ` [PATCH v4 07/10] trace2: report peak memory usage of the process Jeff Hostetler via GitGitGadget
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-15 20:39 ` [PATCH v4 10/10] trace2: update docs to describe system/global config settings Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
10 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Update SID component construction to use the current UTC datetime
and a portion of the SHA1 of the hostname.
Use an simplified date/time format to make it easier to use the
SID component as a logfile filename.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 16 ++++----
trace2/tr2_sid.c | 53 ++++++++++++++++++++++++--
trace2/tr2_tbuf.c | 15 ++++++++
trace2/tr2_tbuf.h | 1 +
4 files changed, 73 insertions(+), 12 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index cdc00bcc5d..43adbf00eb 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -78,11 +78,11 @@ git version 2.20.1.155.g426c96fcdb
+
------------
$ cat ~/log.event
-{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
-{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
-{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
-{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
+{"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
+{"event":"start","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
+{"event":"cmd_name","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
+{"event":"exit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
+{"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
------------
== Enabling a Target
@@ -540,11 +540,11 @@ The following key/value pairs are common to all events:
------------
{
"event":"version",
- "sid":"1547659722619736-11614",
+ "sid":"20190408T191827.272759Z-H9b68c35f-P011764",
"thread":"main",
- "time":"2019-01-16T17:28:42.620713Z",
+ "time":"2019-04-08T19:18:27.282761Z",
"file":"common-main.c",
- "line":38,
+ "line":42,
...
}
------------
diff --git a/trace2/tr2_sid.c b/trace2/tr2_sid.c
index 984524a43c..5047095478 100644
--- a/trace2/tr2_sid.c
+++ b/trace2/tr2_sid.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_sid.h"
#define TR2_ENVVAR_PARENT_SID "GIT_TR2_PARENT_SID"
@@ -6,6 +7,53 @@
static struct strbuf tr2sid_buf = STRBUF_INIT;
static int tr2sid_nr_git_parents;
+/*
+ * Compute the final component of the SID representing the current process.
+ * This should uniquely identify the process and be a valid filename (to
+ * allow writing trace2 data to per-process files). It should also be fixed
+ * length for possible use as a database key.
+ *
+ * "<yyyymmdd>T<hhmmss>.<fraction>Z-<host>-<process>"
+ *
+ * where <host> is a 9 character string:
+ * "H<first_8_chars_of_sha1_of_hostname>"
+ * "Localhost" when no hostname.
+ *
+ * where <process> is a 9 character string containing the least signifcant
+ * 32 bits in the process-id.
+ * "P<pid>"
+ * (This is an abribrary choice. On most systems pid_t is a 32 bit value,
+ * so limit doesn't matter. On larger systems, a truncated value is fine
+ * for our purposes here.)
+ */
+static void tr2_sid_append_my_sid_component(void)
+{
+ const struct git_hash_algo *algo = &hash_algos[GIT_HASH_SHA1];
+ struct tr2_tbuf tb_now;
+ git_hash_ctx ctx;
+ pid_t pid = getpid();
+ unsigned char hash[GIT_MAX_RAWSZ + 1];
+ char hex[GIT_MAX_HEXSZ + 1];
+ char hostname[HOST_NAME_MAX + 1];
+
+ tr2_tbuf_utc_datetime(&tb_now);
+ strbuf_addstr(&tr2sid_buf, tb_now.buf);
+
+ strbuf_addch(&tr2sid_buf, '-');
+ if (xgethostname(hostname, sizeof(hostname)))
+ strbuf_add(&tr2sid_buf, "Localhost", 9);
+ else {
+ algo->init_fn(&ctx);
+ algo->update_fn(&ctx, hostname, strlen(hostname));
+ algo->final_fn(hash, &ctx);
+ hash_to_hex_algop_r(hex, hash, algo);
+ strbuf_addch(&tr2sid_buf, 'H');
+ strbuf_add(&tr2sid_buf, hex, 8);
+ }
+
+ strbuf_addf(&tr2sid_buf, "-P%08"PRIx32, (uint32_t)pid);
+}
+
/*
* Compute a "unique" session id (SID) for the current process. This allows
* all events from this process to have a single label (much like a PID).
@@ -20,7 +68,6 @@ static int tr2sid_nr_git_parents;
*/
static void tr2_sid_compute(void)
{
- uint64_t us_now;
const char *parent_sid;
if (tr2sid_buf.len)
@@ -38,9 +85,7 @@ static void tr2_sid_compute(void)
tr2sid_nr_git_parents++;
}
- us_now = getnanotime() / 1000;
- strbuf_addf(&tr2sid_buf, "%" PRIuMAX "-%" PRIdMAX, (uintmax_t)us_now,
- (intmax_t)getpid());
+ tr2_sid_append_my_sid_component();
setenv(TR2_ENVVAR_PARENT_SID, tr2sid_buf.buf, 1);
}
diff --git a/trace2/tr2_tbuf.c b/trace2/tr2_tbuf.c
index eb1b240d8a..2498482d9a 100644
--- a/trace2/tr2_tbuf.c
+++ b/trace2/tr2_tbuf.c
@@ -30,3 +30,18 @@ void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb)
tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec,
(long)tv.tv_usec);
}
+
+void tr2_tbuf_utc_datetime(struct tr2_tbuf *tb)
+{
+ struct timeval tv;
+ struct tm tm;
+ time_t secs;
+
+ gettimeofday(&tv, NULL);
+ secs = tv.tv_sec;
+ gmtime_r(&secs, &tm);
+
+ xsnprintf(tb->buf, sizeof(tb->buf), "%4d%02d%02dT%02d%02d%02d.%06ldZ",
+ tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour,
+ tm.tm_min, tm.tm_sec, (long)tv.tv_usec);
+}
diff --git a/trace2/tr2_tbuf.h b/trace2/tr2_tbuf.h
index 2a1d173ff2..fa853d8f42 100644
--- a/trace2/tr2_tbuf.h
+++ b/trace2/tr2_tbuf.h
@@ -19,5 +19,6 @@ void tr2_tbuf_local_time(struct tr2_tbuf *tb);
* Fill buffer with formatted UTC datatime string.
*/
void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb);
+void tr2_tbuf_utc_datetime(struct tr2_tbuf *tb);
#endif /* TR2_TBUF_H */
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v4 10/10] trace2: update docs to describe system/global config settings
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
` (8 preceding siblings ...)
2019-04-15 20:39 ` [PATCH v4 09/10] trace2: make SIDs more unique Jeff Hostetler via GitGitGadget
@ 2019-04-15 20:39 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
10 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-15 20:39 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/config.txt | 2 +
Documentation/config/trace2.txt | 56 +++++++++
Documentation/technical/api-trace2.txt | 151 ++++++++++++++-----------
Documentation/trace2-target-values.txt | 10 ++
4 files changed, 152 insertions(+), 67 deletions(-)
create mode 100644 Documentation/config/trace2.txt
create mode 100644 Documentation/trace2-target-values.txt
diff --git a/Documentation/config.txt b/Documentation/config.txt
index d87846faa6..7e2a6f61f5 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -422,6 +422,8 @@ include::config/submodule.txt[]
include::config/tag.txt[]
+include::config/trace2.txt[]
+
include::config/transfer.txt[]
include::config/uploadarchive.txt[]
diff --git a/Documentation/config/trace2.txt b/Documentation/config/trace2.txt
new file mode 100644
index 0000000000..a5f409c1c1
--- /dev/null
+++ b/Documentation/config/trace2.txt
@@ -0,0 +1,56 @@
+Trace2 config settings are only read from the system and global
+config files; repository local and worktree config files and `-c`
+command line arguments are not respected.
+
+trace2.normalTarget::
+ This variable controls the normal target destination.
+ It may be overridden by the `GIT_TR2` environment variable.
+ The following table shows possible values.
+
+trace2.perfTarget::
+ This variable controls the performance target destination.
+ It may be overridden by the `GIT_TR2_PERF` environment variable.
+ The following table shows possible values.
+
+trace2.eventTarget::
+ This variable controls the event target destination.
+ It may be overridden by the `GIT_TR2_EVENT` environment variable.
+ The following table shows possible values.
++
+include::../trace2-target-values.txt[]
+
+trace2.normalBrief::
+ Boolean. When true `time`, `filename`, and `line` fields are
+ omitted from normal output. May be overridden by the
+ `GIT_TR2_BRIEF` environment variable. Defaults to false.
+
+trace2.perfBrief::
+ Boolean. When true `time`, `filename`, and `line` fields are
+ omitted from PERF output. May be overridden by the
+ `GIT_TR2_PERF_BRIEF` environment variable. Defaults to false.
+
+trace2.eventBrief::
+ Boolean. When true `time`, `filename`, and `line` fields are
+ omitted from event output. May be overridden by the
+ `GIT_TR2_EVENT_BRIEF` environment variable. Defaults to false.
+
+trace2.eventNesting::
+ Integer. Specifies desired depth of nested regions in the
+ event output. Regions deeper than this value will be
+ omitted. May be overridden by the `GIT_TR2_EVENT_NESTING`
+ environment variable. Defaults to 2.
+
+trace2.configParams::
+ A comma-separated list of patterns of "important" config
+ settings that should be recorded in the trace2 output.
+ For example, `core.*,remote.*.url` would cause the trace2
+ output to contain events listing each configured remote.
+ May be overridden by the `GIT_TR2_CONFIG_PARAMS` environment
+ variable. Unset by default.
+
+trace2.destinationDebug::
+ Boolean. When true Git will print error messages when a
+ trace target destination cannot be opened for writing.
+ By default, these errors are suppressed and tracing is
+ silently disabled. May be overridden by the
+ `GIT_TR2_DST_DEBUG` environment variable.
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index 43adbf00eb..8b6a5e6d4b 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -22,21 +22,41 @@ Targets are defined using a VTable allowing easy extension to other
formats in the future. This might be used to define a binary format,
for example.
+Trace2 is controlled using `trace2.*` config values in the system and
+global config files and `GIT_TR2*` environment variables. Trace2 does
+not read from repo local or worktree config files or respect `-c`
+command line config settings.
+
== Trace2 Targets
Trace2 defines the following set of Trace2 Targets.
Format details are given in a later section.
-`GIT_TR2` (NORMAL)::
+=== The Normal Format Target
+
+The normal format target is a tradition printf format and similar
+to GIT_TRACE format. This format is enabled with the `GIT_TR`
+environment variable or the `trace2.normalTarget` system or global
+config setting.
+
+For example
- a simple printf format like GIT_TRACE.
-+
------------
$ export GIT_TR2=~/log.normal
$ git version
git version 2.20.1.155.g426c96fcdb
------------
-+
+
+or
+
+------------
+$ git config --global trace2.normalTarget ~/log.normal
+$ git version
+git version 2.20.1.155.g426c96fcdb
+------------
+
+yields
+
------------
$ cat ~/log.normal
12:28:42.620009 common-main.c:38 version 2.20.1.155.g426c96fcdb
@@ -46,17 +66,32 @@ $ cat ~/log.normal
12:28:42.621250 trace2/tr2_tgt_normal.c:124 atexit elapsed:0.001265 code:0
------------
-`GIT_TR2_PERF` (PERF)::
+=== The Performance Format Target
+
+The performance format target (PERF) is a column-based format to
+replace GIT_TRACE_PERFORMANCE and is suitable for development and
+testing, possibly to complement tools like gprof. This format is
+enabled with the `GIT_TR2_PERF` environment variable or the
+`trace2.perfTarget` system or global config setting.
+
+For example
- a column-based format to replace GIT_TRACE_PERFORMANCE suitable for
- development and testing, possibly to complement tools like gprof.
-+
------------
$ export GIT_TR2_PERF=~/log.perf
$ git version
git version 2.20.1.155.g426c96fcdb
------------
-+
+
+or
+
+------------
+$ git config --global trace2.perfTarget ~/log.perf
+$ git version
+git version 2.20.1.155.g426c96fcdb
+------------
+
+yields
+
------------
$ cat ~/log.perf
12:28:42.620675 common-main.c:38 | d0 | main | version | | | | | 2.20.1.155.g426c96fcdb
@@ -66,56 +101,46 @@ $ cat ~/log.perf
12:28:42.621259 trace2/tr2_tgt_perf.c:211 | d0 | main | atexit | | 0.001265 | | | code:0
------------
-`GIT_TR2_EVENT` (EVENT)::
+=== The Event Format Target
+
+The event format target is a JSON-based format of event data suitable
+for telemetry analysis. This format is enabled with the `GIT_TR2_EVENT`
+environment variable or the `trace2.eventTarget` system or global config
+setting.
+
+For example
- a JSON-based format of event data suitable for telemetry analysis.
-+
------------
$ export GIT_TR2_EVENT=~/log.event
$ git version
git version 2.20.1.155.g426c96fcdb
------------
-+
-------------
-$ cat ~/log.event
-{"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
-{"event":"cmd_name","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
-{"event":"exit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
-{"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
-------------
-
-== Enabling a Target
-
-A Trace2 Target is enabled when the corresponding environment variable
-(`GIT_TR2`, `GIT_TR2_PERF`, or `GIT_TR2_EVENT`) is set. The following
-values are recognized.
-
-`0`::
-`false`::
-
- Disables the target.
-`1`::
-`true`::
+or
- Enables the target and writes stream to `STDERR`.
-
-`[2-9]`::
+------------
+$ git config --global trace2.eventTarget ~/log.event
+$ git version
+git version 2.20.1.155.g426c96fcdb
+------------
- Enables the target and writes to the already opened file descriptor.
+yields
-`<absolute-pathname>`::
+------------
+$ cat ~/log.event
+{"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
+{"event":"start","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
+{"event":"cmd_name","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
+{"event":"exit","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
+{"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
+------------
- Enables the target, opens and writes to the file in append mode.
+=== Enabling a Target
-`af_unix:[<socket_type>:]<absolute-pathname>`::
+To enable a target, set the corresponding environment variable or
+system or global config value to one of the following:
- Enables the target, opens and writes to a Unix Domain Socket
- (on platforms that support them).
-+
-Socket type can be either `stream` or `dgram`. If the socket type is
-omitted, Git will try both.
+include::../trace2-target-values.txt[]
== Trace2 API
@@ -243,15 +268,16 @@ significantly affects program performance or behavior, such as
Emits a "def_param" messages for "important" configuration
settings.
+
-The environment variable `GIT_TR2_CONFIG_PARAMS` can be set to a
+The environment variable `GIT_TR2_CONFIG_PARAMS` or the `trace2.configParams`
+config value can be set to a
list of patterns of important configuration settings, for example:
`core.*,remote.*.url`. This function will iterate over all config
settings and emit a "def_param" message for each match.
`void trace2_cmd_set_config(const char *key, const char *value)`::
- Emits a "def_param" message for a specific configuration
- setting IFF it matches the `GIT_TR2_CONFIG_PARAMS` pattern.
+ Emits a "def_param" message for a new or updated key/value
+ pair IF `key` is considered important.
+
This is used to hook into `git_config_set()` and catch any
configuration changes and update a value previously reported by
@@ -418,9 +444,6 @@ recursive tree walk.
=== NORMAL Format
-NORMAL format is enabled when the `GIT_TR2` environment variable is
-set.
-
Events are written as lines of the form:
------------
@@ -437,8 +460,8 @@ Events are written as lines of the form:
Note that this may contain embedded LF or CRLF characters that are
not escaped, so the event may spill across multiple lines.
-If `GIT_TR2_BRIEF` is true, the `time`, `filename`, and `line` fields
-are omitted.
+If `GIT_TR2_BRIEF` or `trace2.normalBrief` is true, the `time`, `filename`,
+and `line` fields are omitted.
This target is intended to be more of a summary (like GIT_TRACE) and
less detailed than the other targets. It ignores thread, region, and
@@ -446,9 +469,6 @@ data messages, for example.
=== PERF Format
-PERF format is enabled when the `GIT_TR2_PERF` environment variable
-is set.
-
Events are written as lines of the form:
------------
@@ -508,8 +528,8 @@ This field is in anticipation of in-proc submodules in the future.
15:33:33.532712 wt-status.c:2331 | d0 | main | region_leave | r1 | 0.127568 | 0.001504 | status | label:print
------------
-If `GIT_TR2_PERF_BRIEF` is true, the `time`, `file`, and `line`
-fields are omitted.
+If `GIT_TR2_PERF_BRIEF` or `trace2.perfBrief` is true, the `time`, `file`,
+and `line` fields are omitted.
------------
d0 | main | region_leave | r1 | 0.011717 | 0.009122 | index | label:preload
@@ -520,9 +540,6 @@ during development and is quite noisy.
=== EVENT Format
-EVENT format is enabled when the `GIT_TR2_EVENT` environment
-variable is set.
-
Each event is a JSON-object containing multiple key/value pairs
written as a single line and followed by a LF.
@@ -540,7 +557,7 @@ The following key/value pairs are common to all events:
------------
{
"event":"version",
- "sid":"20190408T191827.272759Z-H9b68c35f-P011764",
+ "sid":"20190408T191827.272759Z-H9b68c35f-P00003510",
"thread":"main",
"time":"2019-04-08T19:18:27.282761Z",
"file":"common-main.c",
@@ -576,9 +593,9 @@ The following key/value pairs are common to all events:
`"repo":<repo-id>`::
when present, is the integer repo-id as described previously.
-If `GIT_TR2_EVENT_BRIEF` is true, the `file` and `line` fields are omitted
-from all events and the `time` field is only present on the "start" and
-"atexit" events.
+If `GIT_TR2_EVENT_BRIEF` or `trace2.eventBrief` is true, the `file`
+and `line` fields are omitted from all events and the `time` field is
+only present on the "start" and "atexit" events.
==== Event-Specific Key/Value Pairs
@@ -889,7 +906,7 @@ visited.
The `category` field may be used in a future enhancement to
do category-based filtering.
+
-The `GIT_TR2_EVENT_NESTING` environment variable can be used to
+`GIT_TR2_EVENT_NESTING` or `trace2.eventNesting` can be used to
filter deeply nested regions and data events. It defaults to "2".
`"region_leave"`::
diff --git a/Documentation/trace2-target-values.txt b/Documentation/trace2-target-values.txt
new file mode 100644
index 0000000000..27d3c64e66
--- /dev/null
+++ b/Documentation/trace2-target-values.txt
@@ -0,0 +1,10 @@
+--
+* `0` or `false` - Disables the target.
+* `1` or `true` - Writes to `STDERR`.
+* `[2-9]` - Writes to the already opened file descriptor.
+* `<absolute-pathname>` - Writes to the file in append mode.
+* `af_unix:[<socket_type>:]<absolute-pathname>` - Write to a
+Unix DomainSocket (on platforms that support them). Socket
+type can be either `stream` or `dgram`; if omitted Git will
+try both.
+--
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 00/11] trace2: load trace2 settings from system config
2019-04-15 20:39 ` [PATCH v4 " Jeff Hostetler via GitGitGadget
` (9 preceding siblings ...)
2019-04-15 20:39 ` [PATCH v4 10/10] trace2: update docs to describe system/global config settings Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 01/11] config: initialize opts structure in repo_read_config() Jeff Hostetler via GitGitGadget
` (11 more replies)
10 siblings, 12 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git; +Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano
Version 4 fixes a few clang-format warnings and simplifies the PID field in
the SID.
Jeff Hostetler (11):
config: initialize opts structure in repo_read_config()
trace2: refactor setting process starting time
trace2: add absolute elapsed time to start event
trace2: find exec-dir before trace2 initialization
config: add read_very_early_config()
trace2: use system/global config for default trace2 settings
trace2: report peak memory usage of the process
trace2: clarify UTC datetime formatting
trace2: make SIDs more unique
trace2: update docs to describe system/global config settings
trace2: fixup access problem on /etc/gitconfig in
read_very_early_config
Documentation/config.txt | 2 +
Documentation/config/trace2.txt | 56 ++++++++
Documentation/technical/api-trace2.txt | 176 +++++++++++++----------
Documentation/trace2-target-values.txt | 10 ++
Makefile | 1 +
common-main.c | 8 +-
compat/mingw.c | 2 +
compat/win32/trace2_win32_process_info.c | 50 ++++++-
config.c | 30 +++-
config.h | 5 +
t/t0210-trace2-normal.sh | 49 ++++++-
t/t0211-trace2-perf.sh | 43 ++++--
t/t0212-trace2-event.sh | 42 +++++-
trace2.c | 21 ++-
trace2.h | 43 ++++--
trace2/tr2_cfg.c | 7 +-
trace2/tr2_dst.c | 26 ++--
trace2/tr2_dst.h | 3 +-
trace2/tr2_sid.c | 53 ++++++-
trace2/tr2_sysenv.c | 127 ++++++++++++++++
trace2/tr2_sysenv.h | 36 +++++
trace2/tr2_tbuf.c | 19 ++-
trace2/tr2_tbuf.h | 5 +-
trace2/tr2_tgt.h | 1 +
trace2/tr2_tgt_event.c | 53 +++----
trace2/tr2_tgt_normal.c | 19 +--
trace2/tr2_tgt_perf.c | 23 +--
trace2/tr2_tls.c | 38 +++--
trace2/tr2_tls.h | 8 +-
29 files changed, 752 insertions(+), 204 deletions(-)
create mode 100644 Documentation/config/trace2.txt
create mode 100644 Documentation/trace2-target-values.txt
create mode 100644 trace2/tr2_sysenv.c
create mode 100644 trace2/tr2_sysenv.h
base-commit: 041f5ea1cf987a4068ef5f39ba0a09be85952064
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-169%2Fjeffhostetler%2Fcore-tr2-startup-and-sysenv-v5
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-169/jeffhostetler/core-tr2-startup-and-sysenv-v5
Pull-Request: https://github.com/gitgitgadget/git/pull/169
Range-diff vs v4:
1: f6653f1c59 = 1: f6653f1c59 config: initialize opts structure in repo_read_config()
2: 48e34834b6 = 2: 48e34834b6 trace2: refactor setting process starting time
3: 175371fb54 = 3: 175371fb54 trace2: add absolute elapsed time to start event
4: 94729b284c = 4: 94729b284c trace2: find exec-dir before trace2 initialization
5: b0fe1385f1 = 5: b0fe1385f1 config: add read_very_early_config()
6: 550cad6189 = 6: 550cad6189 trace2: use system/global config for default trace2 settings
7: 56d8ce3fd6 = 7: 56d8ce3fd6 trace2: report peak memory usage of the process
8: 196a9d2c85 = 8: 196a9d2c85 trace2: clarify UTC datetime formatting
9: 9fdcb50140 = 9: 9fdcb50140 trace2: make SIDs more unique
10: 3414016d04 = 10: 3414016d04 trace2: update docs to describe system/global config settings
-: ---------- > 11: 18ce795360 trace2: fixup access problem on /etc/gitconfig in read_very_early_config
--
gitgitgadget
^ permalink raw reply [flat|nested] 68+ messages in thread
* [PATCH v5 01/11] config: initialize opts structure in repo_read_config()
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 02/11] trace2: refactor setting process starting time Jeff Hostetler via GitGitGadget
` (10 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Initialize opts structure in repo_read_config().
This change fixes a crash in later commit after a new field is added
to the structure.
In commit 3b256228a66f8587661481ef3e08259864f3ba2a, repo_read_config()
was added. It only initializes 3 fields in the opts structure. It is
passed to config_with_options() and then to do_git_config_sequence().
However, do_git_config_sequence() drops the opts on the floor and calls
git_config_from_file() rather than git_config_from_file_with_options(),
so that may be why this hasn't been a problem in the past.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
config.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/config.c b/config.c
index 0f0cdd8c0f..c809f76219 100644
--- a/config.c
+++ b/config.c
@@ -2011,7 +2011,7 @@ int git_configset_get_pathname(struct config_set *cs, const char *key, const cha
/* Functions use to read configuration from a repository */
static void repo_read_config(struct repository *repo)
{
- struct config_options opts;
+ struct config_options opts = { 0 };
opts.respect_includes = 1;
opts.commondir = repo->commondir;
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 02/11] trace2: refactor setting process starting time
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 01/11] config: initialize opts structure in repo_read_config() Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 03/11] trace2: add absolute elapsed time to start event Jeff Hostetler via GitGitGadget
` (9 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Create trace2_initialize_clock() and call from main() to capture
process start time in isolation and before other sub-systems are
ready.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 12 ++++++--
common-main.c | 2 ++
compat/mingw.c | 2 ++
trace2.c | 7 ++++-
trace2.h | 17 ++++++++++++
trace2/tr2_tls.c | 38 ++++++++++++++++----------
trace2/tr2_tls.h | 8 +++++-
7 files changed, 67 insertions(+), 19 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index 2de565fa3d..f37fccf1da 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -160,17 +160,23 @@ purposes.
These are concerned with the lifetime of the overall git process.
+`void trace2_initialize_clock()`::
+
+ Initialize the Trace2 start clock and nothing else. This should
+ be called at the very top of main() to capture the process start
+ time and reduce startup order dependencies.
+
`void trace2_initialize()`::
Determines if any Trace2 Targets should be enabled and
- initializes the Trace2 facility. This includes starting the
- elapsed time clocks and thread local storage (TLS).
+ initializes the Trace2 facility. This includes setting up the
+ Trace2 thread local storage (TLS).
+
This function emits a "version" message containing the version of git
and the Trace2 protocol.
+
This function should be called from `main()` as early as possible in
-the life of the process.
+the life of the process after essential process initialization.
`int trace2_is_enabled()`::
diff --git a/common-main.c b/common-main.c
index d484aec209..6137af0e63 100644
--- a/common-main.c
+++ b/common-main.c
@@ -27,6 +27,8 @@ int main(int argc, const char **argv)
{
int result;
+ trace2_initialize_clock();
+
/*
* Always open file descriptors 0/1/2 to avoid clobbering files
* in die(). It also avoids messing up when the pipes are dup'ed
diff --git a/compat/mingw.c b/compat/mingw.c
index 6b04514cdc..a2f74aca6a 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -2569,6 +2569,8 @@ void mingw_startup(void)
wchar_t **wenv, **wargv;
_startupinfo si;
+ trace2_initialize_clock();
+
maybe_redirect_std_handles();
/* get wide char arguments and environment */
diff --git a/trace2.c b/trace2.c
index ccccd4ef09..6dd51e6aa5 100644
--- a/trace2.c
+++ b/trace2.c
@@ -142,6 +142,11 @@ static void tr2main_signal_handler(int signo)
raise(signo);
}
+void trace2_initialize_clock(void)
+{
+ tr2tls_start_process_clock();
+}
+
void trace2_initialize_fl(const char *file, int line)
{
struct tr2_tgt *tgt_j;
@@ -428,7 +433,7 @@ void trace2_thread_start_fl(const char *file, int line, const char *thread_name)
us_now = getnanotime() / 1000;
us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
- tr2tls_create_self(thread_name);
+ tr2tls_create_self(thread_name, us_now);
for_each_wanted_builtin (j, tgt_j)
if (tgt_j->pfn_thread_start_fl)
diff --git a/trace2.h b/trace2.h
index ae5020d0e6..8f89e70c44 100644
--- a/trace2.h
+++ b/trace2.h
@@ -19,6 +19,23 @@ struct json_writer;
* [] trace2_printf* -- legacy trace[1] messages.
*/
+/*
+ * Initialize the TRACE2 clock and do nothing else, in particular
+ * no mallocs, no system inspection, and no environment inspection.
+ *
+ * This should be called at the very top of main() to capture the
+ * process start time. This is intended to reduce chicken-n-egg
+ * bootstrap pressure.
+ *
+ * It is safe to call this more than once. This allows capturing
+ * absolute startup costs on Windows which uses a little trickery
+ * to do setup work before common-main.c:main() is called.
+ *
+ * The main trace2_initialize_fl() may be called a little later
+ * after more infrastructure is established.
+ */
+void trace2_initialize_clock(void);
+
/*
* Initialize TRACE2 tracing facility if any of the builtin TRACE2
* targets are enabled in the environment. Emits a 'version' event.
diff --git a/trace2/tr2_tls.c b/trace2/tr2_tls.c
index 8e65b0361d..e76d8c5d92 100644
--- a/trace2/tr2_tls.c
+++ b/trace2/tr2_tls.c
@@ -10,16 +10,30 @@
#define TR2_REGION_NESTING_INITIAL_SIZE (100)
static struct tr2tls_thread_ctx *tr2tls_thread_main;
-static uint64_t tr2tls_us_start_main;
+static uint64_t tr2tls_us_start_process;
static pthread_mutex_t tr2tls_mutex;
static pthread_key_t tr2tls_key;
static int tr2_next_thread_id; /* modify under lock */
-struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name)
+void tr2tls_start_process_clock(void)
+{
+ if (tr2tls_us_start_process)
+ return;
+
+ /*
+ * Keep the absolute start time of the process (i.e. the main
+ * process) in a fixed variable since other threads need to
+ * access it. This allows them to do that without a lock on
+ * main thread's array data (because of reallocs).
+ */
+ tr2tls_us_start_process = getnanotime() / 1000;
+}
+
+struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name,
+ uint64_t us_thread_start)
{
- uint64_t us_now = getnanotime() / 1000;
struct tr2tls_thread_ctx *ctx = xcalloc(1, sizeof(*ctx));
/*
@@ -29,7 +43,7 @@ struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name)
*/
ctx->alloc = TR2_REGION_NESTING_INITIAL_SIZE;
ctx->array_us_start = (uint64_t *)xcalloc(ctx->alloc, sizeof(uint64_t));
- ctx->array_us_start[ctx->nr_open_regions++] = us_now;
+ ctx->array_us_start[ctx->nr_open_regions++] = us_thread_start;
ctx->thread_id = tr2tls_locked_increment(&tr2_next_thread_id);
@@ -55,7 +69,7 @@ struct tr2tls_thread_ctx *tr2tls_get_self(void)
* here and silently continue.
*/
if (!ctx)
- ctx = tr2tls_create_self("unknown");
+ ctx = tr2tls_create_self("unknown", getnanotime() / 1000);
return ctx;
}
@@ -124,22 +138,18 @@ uint64_t tr2tls_absolute_elapsed(uint64_t us)
if (!tr2tls_thread_main)
return 0;
- return us - tr2tls_us_start_main;
+ return us - tr2tls_us_start_process;
}
void tr2tls_init(void)
{
+ tr2tls_start_process_clock();
+
pthread_key_create(&tr2tls_key, NULL);
init_recursive_mutex(&tr2tls_mutex);
- tr2tls_thread_main = tr2tls_create_self("main");
- /*
- * Keep a copy of the absolute start time of the main thread
- * in a fixed variable since other threads need to access it.
- * This also eliminates the need to lock accesses to the main
- * thread's array (because of reallocs).
- */
- tr2tls_us_start_main = tr2tls_thread_main->array_us_start[0];
+ tr2tls_thread_main =
+ tr2tls_create_self("main", tr2tls_us_start_process);
}
void tr2tls_release(void)
diff --git a/trace2/tr2_tls.h b/trace2/tr2_tls.h
index bb80e3f8e7..b1e327a928 100644
--- a/trace2/tr2_tls.h
+++ b/trace2/tr2_tls.h
@@ -31,7 +31,8 @@ struct tr2tls_thread_ctx {
* In this and all following functions the term "self" refers to the
* current thread.
*/
-struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name);
+struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name,
+ uint64_t us_thread_start);
/*
* Get our TLS data.
@@ -94,4 +95,9 @@ void tr2tls_release(void);
*/
int tr2tls_locked_increment(int *p);
+/*
+ * Capture the process start time and do nothing else.
+ */
+void tr2tls_start_process_clock(void);
+
#endif /* TR2_TLS_H */
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 03/11] trace2: add absolute elapsed time to start event
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 01/11] config: initialize opts structure in repo_read_config() Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 02/11] trace2: refactor setting process starting time Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 04/11] trace2: find exec-dir before trace2 initialization Jeff Hostetler via GitGitGadget
` (8 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Add elapsed process time to "start" event to measure
the performance of early process startup.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 11 ++++++-----
t/t0211-trace2-perf.sh | 12 ++++++------
trace2.c | 8 +++++++-
trace2/tr2_tgt.h | 1 +
trace2/tr2_tgt_event.c | 5 ++++-
trace2/tr2_tgt_normal.c | 3 ++-
trace2/tr2_tgt_perf.c | 7 ++++---
7 files changed, 30 insertions(+), 17 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index f37fccf1da..baaa1153bb 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -60,7 +60,7 @@ git version 2.20.1.155.g426c96fcdb
------------
$ cat ~/log.perf
12:28:42.620675 common-main.c:38 | d0 | main | version | | | | | 2.20.1.155.g426c96fcdb
-12:28:42.621001 common-main.c:39 | d0 | main | start | | | | | git version
+12:28:42.621001 common-main.c:39 | d0 | main | start | | 0.001173 | | | git version
12:28:42.621111 git.c:432 | d0 | main | cmd_name | | | | | version (version)
12:28:42.621225 git.c:662 | d0 | main | exit | | 0.001227 | | | code:0
12:28:42.621259 trace2/tr2_tgt_perf.c:211 | d0 | main | atexit | | 0.001265 | | | code:0
@@ -79,7 +79,7 @@ git version 2.20.1.155.g426c96fcdb
------------
$ cat ~/log.event
{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.620713","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621027","file":"common-main.c","line":39,"argv":["git","version"]}
+{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621027","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621122","file":"git.c","line":432,"name":"version","hierarchy":"version"}
{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621236","file":"git.c","line":662,"t_abs":0.001227,"code":0}
{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621268","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
@@ -601,6 +601,7 @@ from all events and the `time` field is only present on the "start" and
{
"event":"start",
...
+ "t_abs":0.001227, # elapsed time in seconds
"argv":["git","version"]
}
------------
@@ -1118,7 +1119,7 @@ $ git status
$ cat ~/log.perf
d0 | main | version | | | | | 2.20.1.160.g5676107ecd.dirty
-d0 | main | start | | | | | git status
+d0 | main | start | | 0.001173 | | | git status
d0 | main | def_repo | r1 | | | | worktree:/Users/jeffhost/work/gfw
d0 | main | cmd_name | | | | | status (status)
...
@@ -1163,7 +1164,7 @@ $ git status
...
$ cat ~/log.perf
d0 | main | version | | | | | 2.20.1.162.gb4ccea44db.dirty
-d0 | main | start | | | | | git status
+d0 | main | start | | 0.001173 | | | git status
d0 | main | def_repo | r1 | | | | worktree:/Users/jeffhost/work/gfw
d0 | main | cmd_name | | | | | status (status)
...
@@ -1219,7 +1220,7 @@ $ git status
...
$ cat ~/log.perf
d0 | main | version | | | | | 2.20.1.156.gf9916ae094.dirty
-d0 | main | start | | | | | git status
+d0 | main | start | | 0.001173 | | | git status
d0 | main | def_repo | r1 | | | | worktree:/Users/jeffhost/work/gfw
d0 | main | cmd_name | | | | | status (status)
d0 | main | region_enter | r1 | 0.001791 | | index | label:do_read_index .git/index
diff --git a/t/t0211-trace2-perf.sh b/t/t0211-trace2-perf.sh
index 953e2f7847..c9694b29f7 100755
--- a/t/t0211-trace2-perf.sh
+++ b/t/t0211-trace2-perf.sh
@@ -50,7 +50,7 @@ test_expect_success 'perf stream, return code 0' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 001return 0
+ d0|main|start||_T_ABS_|||_EXE_ trace2 001return 0
d0|main|cmd_name|||||trace2 (trace2)
d0|main|exit||_T_ABS_|||code:0
d0|main|atexit||_T_ABS_|||code:0
@@ -64,7 +64,7 @@ test_expect_success 'perf stream, return code 1' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 001return 1
+ d0|main|start||_T_ABS_|||_EXE_ trace2 001return 1
d0|main|cmd_name|||||trace2 (trace2)
d0|main|exit||_T_ABS_|||code:1
d0|main|atexit||_T_ABS_|||code:1
@@ -82,7 +82,7 @@ test_expect_success 'perf stream, error event' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 003error '\''hello world'\'' '\''this is a test'\''
+ d0|main|start||_T_ABS_|||_EXE_ trace2 003error '\''hello world'\'' '\''this is a test'\''
d0|main|cmd_name|||||trace2 (trace2)
d0|main|error|||||hello world
d0|main|error|||||this is a test
@@ -128,15 +128,15 @@ test_expect_success 'perf stream, child processes' '
perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
cat >expect <<-EOF &&
d0|main|version|||||$V
- d0|main|start|||||_EXE_ trace2 004child test-tool trace2 004child test-tool trace2 001return 0
+ d0|main|start||_T_ABS_|||_EXE_ trace2 004child test-tool trace2 004child test-tool trace2 001return 0
d0|main|cmd_name|||||trace2 (trace2)
d0|main|child_start||_T_ABS_|||[ch0] class:? argv: test-tool trace2 004child test-tool trace2 001return 0
d1|main|version|||||$V
- d1|main|start|||||_EXE_ trace2 004child test-tool trace2 001return 0
+ d1|main|start||_T_ABS_|||_EXE_ trace2 004child test-tool trace2 001return 0
d1|main|cmd_name|||||trace2 (trace2/trace2)
d1|main|child_start||_T_ABS_|||[ch0] class:? argv: test-tool trace2 001return 0
d2|main|version|||||$V
- d2|main|start|||||_EXE_ trace2 001return 0
+ d2|main|start||_T_ABS_|||_EXE_ trace2 001return 0
d2|main|cmd_name|||||trace2 (trace2/trace2/trace2)
d2|main|exit||_T_ABS_|||code:0
d2|main|atexit||_T_ABS_|||code:0
diff --git a/trace2.c b/trace2.c
index 6dd51e6aa5..1c180062dd 100644
--- a/trace2.c
+++ b/trace2.c
@@ -182,13 +182,19 @@ void trace2_cmd_start_fl(const char *file, int line, const char **argv)
{
struct tr2_tgt *tgt_j;
int j;
+ uint64_t us_now;
+ uint64_t us_elapsed_absolute;
if (!trace2_enabled)
return;
+ us_now = getnanotime() / 1000;
+ us_elapsed_absolute = tr2tls_absolute_elapsed(us_now);
+
for_each_wanted_builtin (j, tgt_j)
if (tgt_j->pfn_start_fl)
- tgt_j->pfn_start_fl(file, line, argv);
+ tgt_j->pfn_start_fl(file, line, us_elapsed_absolute,
+ argv);
}
int trace2_cmd_exit_fl(const char *file, int line, int code)
diff --git a/trace2/tr2_tgt.h b/trace2/tr2_tgt.h
index 297bb8ffbe..7b90469212 100644
--- a/trace2/tr2_tgt.h
+++ b/trace2/tr2_tgt.h
@@ -15,6 +15,7 @@ typedef void(tr2_tgt_term_t)(void);
typedef void(tr2_tgt_evt_version_fl_t)(const char *file, int line);
typedef void(tr2_tgt_evt_start_fl_t)(const char *file, int line,
+ uint64_t us_elapsed_absolute,
const char **argv);
typedef void(tr2_tgt_evt_exit_fl_t)(const char *file, int line,
uint64_t us_elapsed_absolute, int code);
diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
index 107cb5317d..89a4d3ae9a 100644
--- a/trace2/tr2_tgt_event.c
+++ b/trace2/tr2_tgt_event.c
@@ -122,13 +122,16 @@ static void fn_version_fl(const char *file, int line)
jw_release(&jw);
}
-static void fn_start_fl(const char *file, int line, const char **argv)
+static void fn_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char **argv)
{
const char *event_name = "start";
struct json_writer jw = JSON_WRITER_INIT;
+ double t_abs = (double)us_elapsed_absolute / 1000000.0;
jw_object_begin(&jw, 0);
event_fmt_prepare(event_name, file, line, NULL, &jw);
+ jw_object_double(&jw, "t_abs", 6, t_abs);
jw_object_inline_begin_array(&jw, "argv");
jw_array_argv(&jw, argv);
jw_end(&jw);
diff --git a/trace2/tr2_tgt_normal.c b/trace2/tr2_tgt_normal.c
index 547183d5b6..57f3e18f5b 100644
--- a/trace2/tr2_tgt_normal.c
+++ b/trace2/tr2_tgt_normal.c
@@ -81,7 +81,8 @@ static void fn_version_fl(const char *file, int line)
strbuf_release(&buf_payload);
}
-static void fn_start_fl(const char *file, int line, const char **argv)
+static void fn_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char **argv)
{
struct strbuf buf_payload = STRBUF_INIT;
diff --git a/trace2/tr2_tgt_perf.c b/trace2/tr2_tgt_perf.c
index f0746fcf86..9c3b4d8a0f 100644
--- a/trace2/tr2_tgt_perf.c
+++ b/trace2/tr2_tgt_perf.c
@@ -159,15 +159,16 @@ static void fn_version_fl(const char *file, int line)
strbuf_release(&buf_payload);
}
-static void fn_start_fl(const char *file, int line, const char **argv)
+static void fn_start_fl(const char *file, int line,
+ uint64_t us_elapsed_absolute, const char **argv)
{
const char *event_name = "start";
struct strbuf buf_payload = STRBUF_INIT;
sq_quote_argv_pretty(&buf_payload, argv);
- perf_io_write_fl(file, line, event_name, NULL, NULL, NULL, NULL,
- &buf_payload);
+ perf_io_write_fl(file, line, event_name, NULL, &us_elapsed_absolute,
+ NULL, NULL, &buf_payload);
strbuf_release(&buf_payload);
}
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 04/11] trace2: find exec-dir before trace2 initialization
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
` (2 preceding siblings ...)
2019-04-29 20:14 ` [PATCH v5 03/11] trace2: add absolute elapsed time to start event Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 05/11] config: add read_very_early_config() Jeff Hostetler via GitGitGadget
` (7 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Teach Git to resolve the executable directory before initializing
Trace2. This allows the system configuration directory to be
discovered earlier (because it is sometimes relative to the prefix
or runtime-prefix).
This will be used by the next commit to allow trace2 settings to
be loaded from the system config.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
common-main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/common-main.c b/common-main.c
index 6137af0e63..299ca62a72 100644
--- a/common-main.c
+++ b/common-main.c
@@ -37,12 +37,12 @@ int main(int argc, const char **argv)
sanitize_stdfds();
restore_sigpipe_to_default();
+ git_resolve_executable_dir(argv[0]);
+
trace2_initialize();
trace2_cmd_start(argv);
trace2_collect_process_info();
- git_resolve_executable_dir(argv[0]);
-
git_setup_gettext();
initialize_the_repository();
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 05/11] config: add read_very_early_config()
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
` (3 preceding siblings ...)
2019-04-29 20:14 ` [PATCH v5 04/11] trace2: find exec-dir before trace2 initialization Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 06/11] trace2: use system/global config for default trace2 settings Jeff Hostetler via GitGitGadget
` (6 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Created an even lighter version of read_early_config() that
only looks at system and global config settings. It omits
repo-local, worktree-local, and command-line settings.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
config.c | 23 ++++++++++++++++++++---
config.h | 4 ++++
2 files changed, 24 insertions(+), 3 deletions(-)
diff --git a/config.c b/config.c
index c809f76219..d7a08713a8 100644
--- a/config.c
+++ b/config.c
@@ -1688,14 +1688,15 @@ static int do_git_config_sequence(const struct config_options *opts,
ret += git_config_from_file(fn, user_config, data);
current_parsing_scope = CONFIG_SCOPE_REPO;
- if (repo_config && !access_or_die(repo_config, R_OK, 0))
+ if (!opts->ignore_repo && repo_config &&
+ !access_or_die(repo_config, R_OK, 0))
ret += git_config_from_file(fn, repo_config, data);
/*
* Note: this should have a new scope, CONFIG_SCOPE_WORKTREE.
* But let's not complicate things before it's actually needed.
*/
- if (repository_format_worktree_config) {
+ if (!opts->ignore_worktree && repository_format_worktree_config) {
char *path = git_pathdup("config.worktree");
if (!access_or_die(path, R_OK, 0))
ret += git_config_from_file(fn, path, data);
@@ -1703,7 +1704,7 @@ static int do_git_config_sequence(const struct config_options *opts,
}
current_parsing_scope = CONFIG_SCOPE_CMDLINE;
- if (git_config_from_parameters(fn, data) < 0)
+ if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
die(_("unable to parse command-line config"));
current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
@@ -1794,6 +1795,22 @@ void read_early_config(config_fn_t cb, void *data)
strbuf_release(&gitdir);
}
+/*
+ * Read config but only enumerate system and global settings.
+ * Omit any repo-local, worktree-local, or command-line settings.
+ */
+void read_very_early_config(config_fn_t cb, void *data)
+{
+ struct config_options opts = { 0 };
+
+ opts.respect_includes = 1;
+ opts.ignore_repo = 1;
+ opts.ignore_worktree = 1;
+ opts.ignore_cmdline = 1;
+
+ config_with_options(cb, data, NULL, &opts);
+}
+
static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
{
struct config_set_element k;
diff --git a/config.h b/config.h
index ee5d3fa7b4..6a58d61d22 100644
--- a/config.h
+++ b/config.h
@@ -55,6 +55,9 @@ typedef int (*config_parser_event_fn_t)(enum config_event_t type,
struct config_options {
unsigned int respect_includes : 1;
+ unsigned int ignore_repo : 1;
+ unsigned int ignore_worktree : 1;
+ unsigned int ignore_cmdline : 1;
const char *commondir;
const char *git_dir;
config_parser_event_fn_t event_fn;
@@ -83,6 +86,7 @@ extern int git_config_from_blob_oid(config_fn_t fn, const char *name,
extern void git_config_push_parameter(const char *text);
extern int git_config_from_parameters(config_fn_t fn, void *data);
extern void read_early_config(config_fn_t cb, void *data);
+extern void read_very_early_config(config_fn_t cb, void *data);
extern void git_config(config_fn_t fn, void *);
extern int config_with_options(config_fn_t fn, void *,
struct git_config_source *config_source,
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 06/11] trace2: use system/global config for default trace2 settings
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
` (4 preceding siblings ...)
2019-04-29 20:14 ` [PATCH v5 05/11] config: add read_very_early_config() Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 07/11] trace2: report peak memory usage of the process Jeff Hostetler via GitGitGadget
` (5 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Teach git to read the system and global config files for
default Trace2 settings. This allows system-wide Trace2 settings to
be installed and inherited to make it easier to manage a collection of
systems.
The original GIT_TR2* environment variables are loaded afterwards and
can be used to override the system settings.
Only the system and global config files are used. Repo and worktree
local config files are ignored. Likewise, the "-c" command line
arguments are also ignored. These limits are for performance reasons.
(1) For users not using Trace2, there should be minimal overhead to
detect that Trace2 is not enabled. In particular, Trace2 should not
allocate lots of otherwise unused data strucutres.
(2) For accurate performance measurements, Trace2 should be initialized
as early in the git process as possible, and before most of the normal
git process initialization (which involves discovering the .git directory
and reading a hierarchy of config files).
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Makefile | 1 +
t/t0210-trace2-normal.sh | 49 +++++++++++++--
t/t0211-trace2-perf.sh | 31 ++++++++--
t/t0212-trace2-event.sh | 42 +++++++++++--
trace2.c | 4 ++
trace2.h | 12 ++--
trace2/tr2_cfg.c | 7 +--
trace2/tr2_dst.c | 26 ++++----
trace2/tr2_dst.h | 3 +-
trace2/tr2_sysenv.c | 127 +++++++++++++++++++++++++++++++++++++++
trace2/tr2_sysenv.h | 36 +++++++++++
trace2/tr2_tgt_event.c | 46 +++++++-------
trace2/tr2_tgt_normal.c | 16 ++---
trace2/tr2_tgt_perf.c | 16 ++---
14 files changed, 340 insertions(+), 76 deletions(-)
create mode 100644 trace2/tr2_sysenv.c
create mode 100644 trace2/tr2_sysenv.h
diff --git a/Makefile b/Makefile
index 3e03290d8f..9ddfa3dfe7 100644
--- a/Makefile
+++ b/Makefile
@@ -1005,6 +1005,7 @@ LIB_OBJS += trace2/tr2_cfg.o
LIB_OBJS += trace2/tr2_cmd_name.o
LIB_OBJS += trace2/tr2_dst.o
LIB_OBJS += trace2/tr2_sid.o
+LIB_OBJS += trace2/tr2_sysenv.o
LIB_OBJS += trace2/tr2_tbuf.o
LIB_OBJS += trace2/tr2_tgt_event.o
LIB_OBJS += trace2/tr2_tgt_normal.o
diff --git a/t/t0210-trace2-normal.sh b/t/t0210-trace2-normal.sh
index 03a0aedb1d..8d17e1e6f1 100755
--- a/t/t0210-trace2-normal.sh
+++ b/t/t0210-trace2-normal.sh
@@ -3,6 +3,11 @@
test_description='test trace2 facility (normal target)'
. ./test-lib.sh
+# Turn off any inherited trace2 settings for this test.
+sane_unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
+sane_unset GIT_TR2_BRIEF
+sane_unset GIT_TR2_CONFIG_PARAMS
+
# Add t/helper directory to PATH so that we can use a relative
# path to run nested instances of test-tool.exe (see 004child).
# This helps with HEREDOC comparisons later.
@@ -15,11 +20,6 @@ PATH="$TTDIR:$PATH" && export PATH
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
-# Turn off any inherited trace2 settings for this test.
-unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-unset GIT_TR2_BRIEF
-unset GIT_TR2_CONFIG_PARAMS
-
V=$(git version | sed -e 's/^git version //') && export V
# There are multiple trace2 targets: normal, perf, and event.
@@ -132,4 +132,43 @@ test_expect_success 'normal stream, error event' '
test_cmp expect actual
'
+sane_unset GIT_TR2_BRIEF
+
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
+
+test_expect_success 'using global config, normal stream, return code 0' '
+ test_when_finished "rm trace.normal actual expect" &&
+ test_config_global trace2.normalBrief 1 &&
+ test_config_global trace2.normalTarget "$(pwd)/trace.normal" &&
+ test-tool trace2 001return 0 &&
+ perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+ cat >expect <<-EOF &&
+ version $V
+ start _EXE_ trace2 001return 0
+ cmd_name trace2 (trace2)
+ exit elapsed:_TIME_ code:0
+ atexit elapsed:_TIME_ code:0
+ EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'using global config with include' '
+ test_when_finished "rm trace.normal actual expect real.gitconfig" &&
+ test_config_global trace2.normalBrief 1 &&
+ test_config_global trace2.normalTarget "$(pwd)/trace.normal" &&
+ mv "$(pwd)/.gitconfig" "$(pwd)/real.gitconfig" &&
+ test_config_global include.path "$(pwd)/real.gitconfig" &&
+ test-tool trace2 001return 0 &&
+ perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+ cat >expect <<-EOF &&
+ version $V
+ start _EXE_ trace2 001return 0
+ cmd_name trace2 (trace2)
+ exit elapsed:_TIME_ code:0
+ atexit elapsed:_TIME_ code:0
+ EOF
+ test_cmp expect actual
+'
+
test_done
diff --git a/t/t0211-trace2-perf.sh b/t/t0211-trace2-perf.sh
index c9694b29f7..b501e867af 100755
--- a/t/t0211-trace2-perf.sh
+++ b/t/t0211-trace2-perf.sh
@@ -3,6 +3,11 @@
test_description='test trace2 facility (perf target)'
. ./test-lib.sh
+# Turn off any inherited trace2 settings for this test.
+sane_unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
+sane_unset GIT_TR2_PERF_BRIEF
+sane_unset GIT_TR2_CONFIG_PARAMS
+
# Add t/helper directory to PATH so that we can use a relative
# path to run nested instances of test-tool.exe (see 004child).
# This helps with HEREDOC comparisons later.
@@ -15,11 +20,6 @@ PATH="$TTDIR:$PATH" && export PATH
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
-# Turn off any inherited trace2 settings for this test.
-unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-unset GIT_TR2_PERF_BRIEF
-unset GIT_TR2_CONFIG_PARAMS
-
V=$(git version | sed -e 's/^git version //') && export V
# There are multiple trace2 targets: normal, perf, and event.
@@ -150,4 +150,25 @@ test_expect_success 'perf stream, child processes' '
test_cmp expect actual
'
+sane_unset GIT_TR2_PERF_BRIEF
+
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
+
+test_expect_success 'using global config, perf stream, return code 0' '
+ test_when_finished "rm trace.perf actual expect" &&
+ test_config_global trace2.perfBrief 1 &&
+ test_config_global trace2.perfTarget "$(pwd)/trace.perf" &&
+ test-tool trace2 001return 0 &&
+ perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
+ cat >expect <<-EOF &&
+ d0|main|version|||||$V
+ d0|main|start||_T_ABS_|||_EXE_ trace2 001return 0
+ d0|main|cmd_name|||||trace2 (trace2)
+ d0|main|exit||_T_ABS_|||code:0
+ d0|main|atexit||_T_ABS_|||code:0
+ EOF
+ test_cmp expect actual
+'
+
test_done
diff --git a/t/t0212-trace2-event.sh b/t/t0212-trace2-event.sh
index 028b6c5671..59adae8123 100755
--- a/t/t0212-trace2-event.sh
+++ b/t/t0212-trace2-event.sh
@@ -3,6 +3,11 @@
test_description='test trace2 facility'
. ./test-lib.sh
+# Turn off any inherited trace2 settings for this test.
+sane_unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
+sane_unset GIT_TR2_BARE
+sane_unset GIT_TR2_CONFIG_PARAMS
+
perl -MJSON::PP -e 0 >/dev/null 2>&1 && test_set_prereq JSON_PP
# Add t/helper directory to PATH so that we can use a relative
@@ -17,11 +22,6 @@ PATH="$TTDIR:$PATH" && export PATH
# Warning: So you may see extra lines in artifact files when
# Warning: interactively debugging.
-# Turn off any inherited trace2 settings for this test.
-unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
-unset GIT_TR2_BARE
-unset GIT_TR2_CONFIG_PARAMS
-
V=$(git version | sed -e 's/^git version //') && export V
# There are multiple trace2 targets: normal, perf, and event.
@@ -233,4 +233,36 @@ test_expect_success JSON_PP 'basic trace2_data' '
test_cmp expect actual
'
+# Now test without environment variables and get all Trace2 settings
+# from the global config.
+
+test_expect_success JSON_PP 'using global config, event stream, error event' '
+ test_when_finished "rm trace.event actual expect" &&
+ test_config_global trace2.eventTarget "$(pwd)/trace.event" &&
+ test-tool trace2 003error "hello world" "this is a test" &&
+ perl "$TEST_DIRECTORY/t0212/parse_events.perl" <trace.event >actual &&
+ sed -e "s/^|//" >expect <<-EOF &&
+ |VAR1 = {
+ | "_SID0_":{
+ | "argv":[
+ | "_EXE_",
+ | "trace2",
+ | "003error",
+ | "hello world",
+ | "this is a test"
+ | ],
+ | "errors":[
+ | "%s",
+ | "%s"
+ | ],
+ | "exit_code":0,
+ | "hierarchy":"trace2",
+ | "name":"trace2",
+ | "version":"$V"
+ | }
+ |};
+ EOF
+ test_cmp expect actual
+'
+
test_done
diff --git a/trace2.c b/trace2.c
index 1c180062dd..490b3f071e 100644
--- a/trace2.c
+++ b/trace2.c
@@ -10,6 +10,7 @@
#include "trace2/tr2_cmd_name.h"
#include "trace2/tr2_dst.h"
#include "trace2/tr2_sid.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
@@ -120,6 +121,7 @@ static void tr2main_atexit_handler(void)
tr2_sid_release();
tr2_cmd_name_release();
tr2_cfg_free_patterns();
+ tr2_sysenv_release();
trace2_enabled = 0;
}
@@ -155,6 +157,8 @@ void trace2_initialize_fl(const char *file, int line)
if (trace2_enabled)
return;
+ tr2_sysenv_load();
+
if (!tr2_tgt_want_builtins())
return;
trace2_enabled = 1;
diff --git a/trace2.h b/trace2.h
index 8f89e70c44..894bfca7e0 100644
--- a/trace2.h
+++ b/trace2.h
@@ -38,7 +38,8 @@ void trace2_initialize_clock(void);
/*
* Initialize TRACE2 tracing facility if any of the builtin TRACE2
- * targets are enabled in the environment. Emits a 'version' event.
+ * targets are enabled in the system config or the environment.
+ * Emits a 'version' event.
*
* Cleanup/Termination is handled automatically by a registered
* atexit() routine.
@@ -125,10 +126,11 @@ void trace2_cmd_alias_fl(const char *file, int line, const char *alias,
* Emit one or more 'def_param' events for "interesting" configuration
* settings.
*
- * The environment variable "GIT_TR2_CONFIG_PARAMS" can be set to a
- * list of patterns considered important. For example:
- *
- * GIT_TR2_CONFIG_PARAMS="core.*,remote.*.url"
+ * Use the TR2_SYSENV_CFG_PARAM setting to register a comma-separated
+ * list of patterns configured important. For example:
+ * git config --system trace2.configParams 'core.*,remote.*.url'
+ * or:
+ * GIT_TR2_CONFIG_PARAMS=core.*,remote.*.url"
*
* Note: this routine does a read-only iteration on the config data
* (using read_early_config()), so it must not be called until enough
diff --git a/trace2/tr2_cfg.c b/trace2/tr2_cfg.c
index b329921ac5..caa7f06948 100644
--- a/trace2/tr2_cfg.c
+++ b/trace2/tr2_cfg.c
@@ -1,8 +1,7 @@
#include "cache.h"
#include "config.h"
-#include "tr2_cfg.h"
-
-#define TR2_ENVVAR_CFG_PARAM "GIT_TR2_CONFIG_PARAMS"
+#include "trace2/tr2_cfg.h"
+#include "trace2/tr2_sysenv.h"
static struct strbuf **tr2_cfg_patterns;
static int tr2_cfg_count_patterns;
@@ -21,7 +20,7 @@ static int tr2_cfg_load_patterns(void)
return tr2_cfg_count_patterns;
tr2_cfg_loaded = 1;
- envvar = getenv(TR2_ENVVAR_CFG_PARAM);
+ envvar = tr2_sysenv_get(TR2_SYSENV_CFG_PARAM);
if (!envvar || !*envvar)
return tr2_cfg_count_patterns;
diff --git a/trace2/tr2_dst.c b/trace2/tr2_dst.c
index fd490a43ad..7d96f33420 100644
--- a/trace2/tr2_dst.c
+++ b/trace2/tr2_dst.c
@@ -1,5 +1,6 @@
#include "cache.h"
#include "trace2/tr2_dst.h"
+#include "trace2/tr2_sysenv.h"
/*
* If a Trace2 target cannot be opened for writing, we should issue a
@@ -7,17 +8,13 @@
* or socket and beyond the user's control -- especially since every
* git command (and sub-command) will print the message. So we silently
* eat these warnings and just discard the trace data.
- *
- * Enable the following environment variable to see these warnings.
*/
-#define TR2_ENVVAR_DST_DEBUG "GIT_TR2_DST_DEBUG"
-
static int tr2_dst_want_warning(void)
{
static int tr2env_dst_debug = -1;
if (tr2env_dst_debug == -1) {
- const char *env_value = getenv(TR2_ENVVAR_DST_DEBUG);
+ const char *env_value = tr2_sysenv_get(TR2_SYSENV_DST_DEBUG);
if (!env_value || !*env_value)
tr2env_dst_debug = 0;
else
@@ -42,7 +39,9 @@ static int tr2_dst_try_path(struct tr2_dst *dst, const char *tgt_value)
if (fd == -1) {
if (tr2_dst_want_warning())
warning("trace2: could not open '%s' for '%s' tracing: %s",
- tgt_value, dst->env_var_name, strerror(errno));
+ tgt_value,
+ tr2_sysenv_display_name(dst->sysenv_var),
+ strerror(errno));
tr2_dst_trace_disable(dst);
return 0;
@@ -116,7 +115,8 @@ static int tr2_dst_try_unix_domain_socket(struct tr2_dst *dst,
if (!path || !*path) {
if (tr2_dst_want_warning())
warning("trace2: invalid AF_UNIX value '%s' for '%s' tracing",
- tgt_value, dst->env_var_name);
+ tgt_value,
+ tr2_sysenv_display_name(dst->sysenv_var));
tr2_dst_trace_disable(dst);
return 0;
@@ -126,7 +126,7 @@ static int tr2_dst_try_unix_domain_socket(struct tr2_dst *dst,
strlen(path) >= sizeof(((struct sockaddr_un *)0)->sun_path)) {
if (tr2_dst_want_warning())
warning("trace2: invalid AF_UNIX path '%s' for '%s' tracing",
- path, dst->env_var_name);
+ path, tr2_sysenv_display_name(dst->sysenv_var));
tr2_dst_trace_disable(dst);
return 0;
@@ -148,7 +148,8 @@ static int tr2_dst_try_unix_domain_socket(struct tr2_dst *dst,
error:
if (tr2_dst_want_warning())
warning("trace2: could not connect to socket '%s' for '%s' tracing: %s",
- path, dst->env_var_name, strerror(e));
+ path, tr2_sysenv_display_name(dst->sysenv_var),
+ strerror(e));
tr2_dst_trace_disable(dst);
return 0;
@@ -168,7 +169,7 @@ static void tr2_dst_malformed_warning(struct tr2_dst *dst,
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf, "trace2: unknown value for '%s': '%s'",
- dst->env_var_name, tgt_value);
+ tr2_sysenv_display_name(dst->sysenv_var), tgt_value);
warning("%s", buf.buf);
strbuf_release(&buf);
@@ -184,7 +185,7 @@ int tr2_dst_get_trace_fd(struct tr2_dst *dst)
dst->initialized = 1;
- tgt_value = getenv(dst->env_var_name);
+ tgt_value = tr2_sysenv_get(dst->sysenv_var);
if (!tgt_value || !strcmp(tgt_value, "") || !strcmp(tgt_value, "0") ||
!strcasecmp(tgt_value, "false")) {
@@ -246,7 +247,8 @@ void tr2_dst_write_line(struct tr2_dst *dst, struct strbuf *buf_line)
return;
if (tr2_dst_want_warning())
- warning("unable to write trace to '%s': %s", dst->env_var_name,
+ warning("unable to write trace to '%s': %s",
+ tr2_sysenv_display_name(dst->sysenv_var),
strerror(errno));
tr2_dst_trace_disable(dst);
}
diff --git a/trace2/tr2_dst.h b/trace2/tr2_dst.h
index 9a64f05b02..3adf3bac13 100644
--- a/trace2/tr2_dst.h
+++ b/trace2/tr2_dst.h
@@ -2,9 +2,10 @@
#define TR2_DST_H
struct strbuf;
+#include "trace2/tr2_sysenv.h"
struct tr2_dst {
- const char *const env_var_name;
+ enum tr2_sysenv_variable sysenv_var;
int fd;
unsigned int initialized : 1;
unsigned int need_close : 1;
diff --git a/trace2/tr2_sysenv.c b/trace2/tr2_sysenv.c
new file mode 100644
index 0000000000..9025b86303
--- /dev/null
+++ b/trace2/tr2_sysenv.c
@@ -0,0 +1,127 @@
+#include "cache.h"
+#include "config.h"
+#include "dir.h"
+#include "tr2_sysenv.h"
+
+/*
+ * Each entry represents a trace2 setting.
+ * See Documentation/technical/api-trace2.txt
+ */
+struct tr2_sysenv_entry {
+ const char *env_var_name;
+ const char *git_config_name;
+
+ char *value;
+ unsigned int getenv_called : 1;
+};
+
+/*
+ * This table must match "enum tr2_sysenv_variable" in tr2_sysenv.h.
+ *
+ * The strings in this table are constant and must match the published
+ * config and environment variable names as described in the documentation.
+ *
+ * We do not define entries for the GIT_TR2_PARENT_* environment
+ * variables because they are transient and used to pass information
+ * from parent to child git processes, rather than settings.
+ */
+/* clang-format off */
+static struct tr2_sysenv_entry tr2_sysenv_settings[] = {
+ [TR2_SYSENV_CFG_PARAM] = { "GIT_TR2_CONFIG_PARAMS",
+ "trace2.configparams" },
+
+ [TR2_SYSENV_DST_DEBUG] = { "GIT_TR2_DST_DEBUG",
+ "trace2.destinationdebug" },
+
+ [TR2_SYSENV_NORMAL] = { "GIT_TR2",
+ "trace2.normaltarget" },
+ [TR2_SYSENV_NORMAL_BRIEF] = { "GIT_TR2_BRIEF",
+ "trace2.normalbrief" },
+
+ [TR2_SYSENV_EVENT] = { "GIT_TR2_EVENT",
+ "trace2.eventtarget" },
+ [TR2_SYSENV_EVENT_BRIEF] = { "GIT_TR2_EVENT_BRIEF",
+ "trace2.eventbrief" },
+ [TR2_SYSENV_EVENT_NESTING] = { "GIT_TR2_EVENT_NESTING",
+ "trace2.eventnesting" },
+
+ [TR2_SYSENV_PERF] = { "GIT_TR2_PERF",
+ "trace2.perftarget" },
+ [TR2_SYSENV_PERF_BRIEF] = { "GIT_TR2_PERF_BRIEF",
+ "trace2.perfbrief" },
+};
+/* clang-format on */
+
+static int tr2_sysenv_cb(const char *key, const char *value, void *d)
+{
+ int k;
+
+ if (!starts_with(key, "trace2."))
+ return 0;
+
+ for (k = 0; k < ARRAY_SIZE(tr2_sysenv_settings); k++) {
+ if (!strcmp(key, tr2_sysenv_settings[k].git_config_name)) {
+ free(tr2_sysenv_settings[k].value);
+ tr2_sysenv_settings[k].value = xstrdup(value);
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Load Trace2 settings from the system config (usually "/etc/gitconfig"
+ * unless we were built with a runtime-prefix). These are intended to
+ * define the default values for Trace2 as requested by the administrator.
+ *
+ * Then override with the Trace2 settings from the global config.
+ */
+void tr2_sysenv_load(void)
+{
+ if (ARRAY_SIZE(tr2_sysenv_settings) != TR2_SYSENV_MUST_BE_LAST)
+ BUG("tr2_sysenv_settings size is wrong");
+
+ read_very_early_config(tr2_sysenv_cb, NULL);
+}
+
+/*
+ * Return the value for the requested Trace2 setting from these sources:
+ * the system config, the global config, and the environment.
+ */
+const char *tr2_sysenv_get(enum tr2_sysenv_variable var)
+{
+ if (var >= TR2_SYSENV_MUST_BE_LAST)
+ BUG("tr2_sysenv_get invalid var '%d'", var);
+
+ if (!tr2_sysenv_settings[var].getenv_called) {
+ const char *v = getenv(tr2_sysenv_settings[var].env_var_name);
+ if (v && *v) {
+ free(tr2_sysenv_settings[var].value);
+ tr2_sysenv_settings[var].value = xstrdup(v);
+ }
+ tr2_sysenv_settings[var].getenv_called = 1;
+ }
+
+ return tr2_sysenv_settings[var].value;
+}
+
+/*
+ * Return a friendly name for this setting that is suitable for printing
+ * in an error messages.
+ */
+const char *tr2_sysenv_display_name(enum tr2_sysenv_variable var)
+{
+ if (var >= TR2_SYSENV_MUST_BE_LAST)
+ BUG("tr2_sysenv_get invalid var '%d'", var);
+
+ return tr2_sysenv_settings[var].env_var_name;
+}
+
+void tr2_sysenv_release(void)
+{
+ int k;
+
+ for (k = 0; k < ARRAY_SIZE(tr2_sysenv_settings); k++)
+ free(tr2_sysenv_settings[k].value);
+}
diff --git a/trace2/tr2_sysenv.h b/trace2/tr2_sysenv.h
new file mode 100644
index 0000000000..369b20bd87
--- /dev/null
+++ b/trace2/tr2_sysenv.h
@@ -0,0 +1,36 @@
+#ifndef TR2_SYSENV_H
+#define TR2_SYSENV_H
+
+/*
+ * The Trace2 settings that can be loaded from /etc/gitconfig
+ * and/or user environment variables.
+ *
+ * Note that this set does not contain any of the transient
+ * environment variables used to pass information from parent
+ * to child git processes, such "GIT_TR2_PARENT_SID".
+ */
+enum tr2_sysenv_variable {
+ TR2_SYSENV_CFG_PARAM = 0,
+
+ TR2_SYSENV_DST_DEBUG,
+
+ TR2_SYSENV_NORMAL,
+ TR2_SYSENV_NORMAL_BRIEF,
+
+ TR2_SYSENV_EVENT,
+ TR2_SYSENV_EVENT_BRIEF,
+ TR2_SYSENV_EVENT_NESTING,
+
+ TR2_SYSENV_PERF,
+ TR2_SYSENV_PERF_BRIEF,
+
+ TR2_SYSENV_MUST_BE_LAST
+};
+
+void tr2_sysenv_load(void);
+
+const char *tr2_sysenv_get(enum tr2_sysenv_variable);
+const char *tr2_sysenv_display_name(enum tr2_sysenv_variable var);
+void tr2_sysenv_release(void);
+
+#endif /* TR2_SYSENV_H */
diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
index 89a4d3ae9a..48d9193b2c 100644
--- a/trace2/tr2_tgt_event.c
+++ b/trace2/tr2_tgt_event.c
@@ -6,10 +6,11 @@
#include "trace2/tr2_dst.h"
#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_sid.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
-static struct tr2_dst tr2dst_event = { "GIT_TR2_EVENT", 0, 0, 0 };
+static struct tr2_dst tr2dst_event = { TR2_SYSENV_EVENT, 0, 0, 0 };
/*
* The version number of the JSON data generated by the EVENT target
@@ -28,37 +29,36 @@ static struct tr2_dst tr2dst_event = { "GIT_TR2_EVENT", 0, 0, 0 };
* are primarily intended for the performance target during debugging.
*
* Some of the outer-most messages, however, may be of interest to the
- * event target. Set this environment variable to a larger integer for
- * more detail in the event target.
+ * event target. Use the TR2_SYSENV_EVENT_NESTING setting to increase
+ * region details in the event target.
*/
-#define TR2_ENVVAR_EVENT_NESTING "GIT_TR2_EVENT_NESTING"
-static int tr2env_event_nesting_wanted = 2;
+static int tr2env_event_max_nesting_levels = 2;
/*
- * Set this environment variable to true to omit the <time>, <file>, and
+ * Use the TR2_SYSENV_EVENT_BRIEF to omit the <time>, <file>, and
* <line> fields from most events.
*/
-#define TR2_ENVVAR_EVENT_BRIEF "GIT_TR2_EVENT_BRIEF"
-static int tr2env_event_brief;
+static int tr2env_event_be_brief;
static int fn_init(void)
{
int want = tr2_dst_trace_want(&tr2dst_event);
- int want_nesting;
+ int max_nesting;
int want_brief;
- char *nesting;
- char *brief;
+ const char *nesting;
+ const char *brief;
if (!want)
return want;
- nesting = getenv(TR2_ENVVAR_EVENT_NESTING);
- if (nesting && ((want_nesting = atoi(nesting)) > 0))
- tr2env_event_nesting_wanted = want_nesting;
+ nesting = tr2_sysenv_get(TR2_SYSENV_EVENT_NESTING);
+ if (nesting && *nesting && ((max_nesting = atoi(nesting)) > 0))
+ tr2env_event_max_nesting_levels = max_nesting;
- brief = getenv(TR2_ENVVAR_EVENT_BRIEF);
- if (brief && ((want_brief = atoi(brief)) > 0))
- tr2env_event_brief = want_brief;
+ brief = tr2_sysenv_get(TR2_SYSENV_EVENT_BRIEF);
+ if (brief && *brief &&
+ ((want_brief = git_parse_maybe_bool(brief)) != -1))
+ tr2env_event_be_brief = want_brief;
return want;
}
@@ -92,13 +92,13 @@ static void event_fmt_prepare(const char *event_name, const char *file,
/*
* In brief mode, only emit <time> on these 2 event types.
*/
- if (!tr2env_event_brief || !strcmp(event_name, "version") ||
+ if (!tr2env_event_be_brief || !strcmp(event_name, "version") ||
!strcmp(event_name, "atexit")) {
tr2_tbuf_utc_time(&tb_now);
jw_object_string(jw, "time", tb_now.buf);
}
- if (!tr2env_event_brief && file && *file) {
+ if (!tr2env_event_be_brief && file && *file) {
jw_object_string(jw, "file", file);
jw_object_intmax(jw, "line", line);
}
@@ -459,7 +459,7 @@ static void fn_region_enter_printf_va_fl(const char *file, int line,
{
const char *event_name = "region_enter";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
jw_object_begin(&jw, 0);
@@ -484,7 +484,7 @@ static void fn_region_leave_printf_va_fl(
{
const char *event_name = "region_leave";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
double t_rel = (double)us_elapsed_region / 1000000.0;
@@ -511,7 +511,7 @@ static void fn_data_fl(const char *file, int line, uint64_t us_elapsed_absolute,
{
const char *event_name = "data";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
double t_abs = (double)us_elapsed_absolute / 1000000.0;
double t_rel = (double)us_elapsed_region / 1000000.0;
@@ -539,7 +539,7 @@ static void fn_data_json_fl(const char *file, int line,
{
const char *event_name = "data_json";
struct tr2tls_thread_ctx *ctx = tr2tls_get_self();
- if (ctx->nr_open_regions <= tr2env_event_nesting_wanted) {
+ if (ctx->nr_open_regions <= tr2env_event_max_nesting_levels) {
struct json_writer jw = JSON_WRITER_INIT;
double t_abs = (double)us_elapsed_absolute / 1000000.0;
double t_rel = (double)us_elapsed_region / 1000000.0;
diff --git a/trace2/tr2_tgt_normal.c b/trace2/tr2_tgt_normal.c
index 57f3e18f5b..1ce6f97863 100644
--- a/trace2/tr2_tgt_normal.c
+++ b/trace2/tr2_tgt_normal.c
@@ -4,20 +4,20 @@
#include "quote.h"
#include "version.h"
#include "trace2/tr2_dst.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
-static struct tr2_dst tr2dst_normal = { "GIT_TR2", 0, 0, 0 };
+static struct tr2_dst tr2dst_normal = { TR2_SYSENV_NORMAL, 0, 0, 0 };
/*
- * Set this environment variable to true to omit the "<time> <file>:<line>"
+ * Use the TR2_SYSENV_NORMAL_BRIEF setting to omit the "<time> <file>:<line>"
* fields from each line written to the builtin normal target.
*
* Unit tests may want to use this to help with testing.
*/
-#define TR2_ENVVAR_NORMAL_BRIEF "GIT_TR2_BRIEF"
-static int tr2env_normal_brief;
+static int tr2env_normal_be_brief;
#define TR2FMT_NORMAL_FL_WIDTH (50)
@@ -25,15 +25,15 @@ static int fn_init(void)
{
int want = tr2_dst_trace_want(&tr2dst_normal);
int want_brief;
- char *brief;
+ const char *brief;
if (!want)
return want;
- brief = getenv(TR2_ENVVAR_NORMAL_BRIEF);
+ brief = tr2_sysenv_get(TR2_SYSENV_NORMAL_BRIEF);
if (brief && *brief &&
((want_brief = git_parse_maybe_bool(brief)) != -1))
- tr2env_normal_brief = want_brief;
+ tr2env_normal_be_brief = want_brief;
return want;
}
@@ -47,7 +47,7 @@ static void normal_fmt_prepare(const char *file, int line, struct strbuf *buf)
{
strbuf_setlen(buf, 0);
- if (!tr2env_normal_brief) {
+ if (!tr2env_normal_be_brief) {
struct tr2_tbuf tb_now;
tr2_tbuf_local_time(&tb_now);
diff --git a/trace2/tr2_tgt_perf.c b/trace2/tr2_tgt_perf.c
index 9c3b4d8a0f..328d2234bd 100644
--- a/trace2/tr2_tgt_perf.c
+++ b/trace2/tr2_tgt_perf.c
@@ -6,20 +6,20 @@
#include "json-writer.h"
#include "trace2/tr2_dst.h"
#include "trace2/tr2_sid.h"
+#include "trace2/tr2_sysenv.h"
#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_tgt.h"
#include "trace2/tr2_tls.h"
-static struct tr2_dst tr2dst_perf = { "GIT_TR2_PERF", 0, 0, 0 };
+static struct tr2_dst tr2dst_perf = { TR2_SYSENV_PERF, 0, 0, 0 };
/*
- * Set this environment variable to true to omit the "<time> <file>:<line>"
+ * Use TR2_SYSENV_PERF_BRIEF to omit the "<time> <file>:<line>"
* fields from each line written to the builtin performance target.
*
* Unit tests may want to use this to help with testing.
*/
-#define TR2_ENVVAR_PERF_BRIEF "GIT_TR2_PERF_BRIEF"
-static int tr2env_perf_brief;
+static int tr2env_perf_be_brief;
#define TR2FMT_PERF_FL_WIDTH (50)
#define TR2FMT_PERF_MAX_EVENT_NAME (12)
@@ -36,17 +36,17 @@ static int fn_init(void)
{
int want = tr2_dst_trace_want(&tr2dst_perf);
int want_brief;
- char *brief;
+ const char *brief;
if (!want)
return want;
strbuf_addchars(&dots, '.', TR2_DOTS_BUFFER_SIZE);
- brief = getenv(TR2_ENVVAR_PERF_BRIEF);
+ brief = tr2_sysenv_get(TR2_SYSENV_PERF_BRIEF);
if (brief && *brief &&
((want_brief = git_parse_maybe_bool(brief)) != -1))
- tr2env_perf_brief = want_brief;
+ tr2env_perf_be_brief = want_brief;
return want;
}
@@ -77,7 +77,7 @@ static void perf_fmt_prepare(const char *event_name,
strbuf_setlen(buf, 0);
- if (!tr2env_perf_brief) {
+ if (!tr2env_perf_be_brief) {
struct tr2_tbuf tb_now;
tr2_tbuf_local_time(&tb_now);
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 07/11] trace2: report peak memory usage of the process
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
` (5 preceding siblings ...)
2019-04-29 20:14 ` [PATCH v5 06/11] trace2: use system/global config for default trace2 settings Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 08/11] trace2: clarify UTC datetime formatting Jeff Hostetler via GitGitGadget
` (4 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Teach Windows version of git to report peak memory usage
during exit() processing.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
common-main.c | 2 +-
compat/win32/trace2_win32_process_info.c | 50 ++++++++++++++++++++++--
trace2.c | 2 +
trace2.h | 14 +++++--
4 files changed, 60 insertions(+), 8 deletions(-)
diff --git a/common-main.c b/common-main.c
index 299ca62a72..582a7b1886 100644
--- a/common-main.c
+++ b/common-main.c
@@ -41,7 +41,7 @@ int main(int argc, const char **argv)
trace2_initialize();
trace2_cmd_start(argv);
- trace2_collect_process_info();
+ trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP);
git_setup_gettext();
diff --git a/compat/win32/trace2_win32_process_info.c b/compat/win32/trace2_win32_process_info.c
index 52bd62034b..8ccbd1c2c6 100644
--- a/compat/win32/trace2_win32_process_info.c
+++ b/compat/win32/trace2_win32_process_info.c
@@ -1,5 +1,6 @@
#include "../../cache.h"
#include "../../json-writer.h"
+#include "lazyload.h"
#include <Psapi.h>
#include <tlHelp32.h>
@@ -137,11 +138,54 @@ static void get_is_being_debugged(void)
"windows/debugger_present", 1);
}
-void trace2_collect_process_info(void)
+/*
+ * Emit JSON data with the peak memory usage of the current process.
+ */
+static void get_peak_memory_info(void)
+{
+ DECLARE_PROC_ADDR(psapi.dll, BOOL, GetProcessMemoryInfo, HANDLE,
+ PPROCESS_MEMORY_COUNTERS, DWORD);
+
+ if (INIT_PROC_ADDR(GetProcessMemoryInfo)) {
+ PROCESS_MEMORY_COUNTERS pmc;
+
+ if (GetProcessMemoryInfo(GetCurrentProcess(), &pmc,
+ sizeof(pmc))) {
+ struct json_writer jw = JSON_WRITER_INIT;
+
+ jw_object_begin(&jw, 0);
+
+#define KV(kv) #kv, (intmax_t)pmc.kv
+
+ jw_object_intmax(&jw, KV(PageFaultCount));
+ jw_object_intmax(&jw, KV(PeakWorkingSetSize));
+ jw_object_intmax(&jw, KV(PeakPagefileUsage));
+
+ jw_end(&jw);
+
+ trace2_data_json("process", the_repository,
+ "windows/memory", &jw);
+ jw_release(&jw);
+ }
+ }
+}
+
+void trace2_collect_process_info(enum trace2_process_info_reason reason)
{
if (!trace2_is_enabled())
return;
- get_is_being_debugged();
- get_ancestry();
+ switch (reason) {
+ case TRACE2_PROCESS_INFO_STARTUP:
+ get_is_being_debugged();
+ get_ancestry();
+ return;
+
+ case TRACE2_PROCESS_INFO_EXIT:
+ get_peak_memory_info();
+ return;
+
+ default:
+ BUG("trace2_collect_process_info: unknown reason '%d'", reason);
+ }
}
diff --git a/trace2.c b/trace2.c
index 490b3f071e..6baa65cdf9 100644
--- a/trace2.c
+++ b/trace2.c
@@ -213,6 +213,8 @@ int trace2_cmd_exit_fl(const char *file, int line, int code)
if (!trace2_enabled)
return code;
+ trace2_collect_process_info(TRACE2_PROCESS_INFO_EXIT);
+
tr2main_exit_code = code;
us_now = getnanotime() / 1000;
diff --git a/trace2.h b/trace2.h
index 894bfca7e0..888531eb08 100644
--- a/trace2.h
+++ b/trace2.h
@@ -391,13 +391,19 @@ void trace2_printf(const char *fmt, ...);
* Optional platform-specific code to dump information about the
* current and any parent process(es). This is intended to allow
* post-processors to know who spawned this git instance and anything
- * else the platform may be able to tell us about the current process.
+ * else that the platform may be able to tell us about the current process.
*/
+
+enum trace2_process_info_reason {
+ TRACE2_PROCESS_INFO_STARTUP,
+ TRACE2_PROCESS_INFO_EXIT,
+};
+
#if defined(GIT_WINDOWS_NATIVE)
-void trace2_collect_process_info(void);
+void trace2_collect_process_info(enum trace2_process_info_reason reason);
#else
-#define trace2_collect_process_info() \
- do { \
+#define trace2_collect_process_info(reason) \
+ do { \
} while (0)
#endif
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 08/11] trace2: clarify UTC datetime formatting
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
` (6 preceding siblings ...)
2019-04-29 20:14 ` [PATCH v5 07/11] trace2: report peak memory usage of the process Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 09/11] trace2: make SIDs more unique Jeff Hostetler via GitGitGadget
` (3 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Update tr2_tbuf_utc_datetime to generate extended UTC format.
Update tr2_tgt_event target to use extended format in 'time' columns.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 12 ++++++------
trace2/tr2_tbuf.c | 4 ++--
trace2/tr2_tbuf.h | 4 ++--
trace2/tr2_tgt_event.c | 2 +-
4 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index baaa1153bb..cdc00bcc5d 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -78,11 +78,11 @@ git version 2.20.1.155.g426c96fcdb
+
------------
$ cat ~/log.event
-{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.620713","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621027","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
-{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621122","file":"git.c","line":432,"name":"version","hierarchy":"version"}
-{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621236","file":"git.c","line":662,"t_abs":0.001227,"code":0}
-{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16 17:28:42.621268","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
+{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
+{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
+{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
+{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
+{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
------------
== Enabling a Target
@@ -542,7 +542,7 @@ The following key/value pairs are common to all events:
"event":"version",
"sid":"1547659722619736-11614",
"thread":"main",
- "time":"2019-01-16 17:28:42.620713",
+ "time":"2019-01-16T17:28:42.620713Z",
"file":"common-main.c",
"line":38,
...
diff --git a/trace2/tr2_tbuf.c b/trace2/tr2_tbuf.c
index 0844910423..eb1b240d8a 100644
--- a/trace2/tr2_tbuf.c
+++ b/trace2/tr2_tbuf.c
@@ -15,7 +15,7 @@ void tr2_tbuf_local_time(struct tr2_tbuf *tb)
tm.tm_min, tm.tm_sec, (long)tv.tv_usec);
}
-void tr2_tbuf_utc_time(struct tr2_tbuf *tb)
+void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb)
{
struct timeval tv;
struct tm tm;
@@ -26,7 +26,7 @@ void tr2_tbuf_utc_time(struct tr2_tbuf *tb)
gmtime_r(&secs, &tm);
xsnprintf(tb->buf, sizeof(tb->buf),
- "%4d-%02d-%02d %02d:%02d:%02d.%06ld", tm.tm_year + 1900,
+ "%4d-%02d-%02dT%02d:%02d:%02d.%06ldZ", tm.tm_year + 1900,
tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec,
(long)tv.tv_usec);
}
diff --git a/trace2/tr2_tbuf.h b/trace2/tr2_tbuf.h
index 9cdefa3957..2a1d173ff2 100644
--- a/trace2/tr2_tbuf.h
+++ b/trace2/tr2_tbuf.h
@@ -16,8 +16,8 @@ struct tr2_tbuf {
void tr2_tbuf_local_time(struct tr2_tbuf *tb);
/*
- * Fill buffer with formatted UTC time string.
+ * Fill buffer with formatted UTC datatime string.
*/
-void tr2_tbuf_utc_time(struct tr2_tbuf *tb);
+void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb);
#endif /* TR2_TBUF_H */
diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
index 48d9193b2c..2c97cf54be 100644
--- a/trace2/tr2_tgt_event.c
+++ b/trace2/tr2_tgt_event.c
@@ -94,7 +94,7 @@ static void event_fmt_prepare(const char *event_name, const char *file,
*/
if (!tr2env_event_be_brief || !strcmp(event_name, "version") ||
!strcmp(event_name, "atexit")) {
- tr2_tbuf_utc_time(&tb_now);
+ tr2_tbuf_utc_datetime_extended(&tb_now);
jw_object_string(jw, "time", tb_now.buf);
}
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 09/11] trace2: make SIDs more unique
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
` (7 preceding siblings ...)
2019-04-29 20:14 ` [PATCH v5 08/11] trace2: clarify UTC datetime formatting Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 10/11] trace2: update docs to describe system/global config settings Jeff Hostetler via GitGitGadget
` (2 subsequent siblings)
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Update SID component construction to use the current UTC datetime
and a portion of the SHA1 of the hostname.
Use an simplified date/time format to make it easier to use the
SID component as a logfile filename.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/technical/api-trace2.txt | 16 ++++----
trace2/tr2_sid.c | 53 ++++++++++++++++++++++++--
trace2/tr2_tbuf.c | 15 ++++++++
trace2/tr2_tbuf.h | 1 +
4 files changed, 73 insertions(+), 12 deletions(-)
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index cdc00bcc5d..43adbf00eb 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -78,11 +78,11 @@ git version 2.20.1.155.g426c96fcdb
+
------------
$ cat ~/log.event
-{"event":"version","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
-{"event":"cmd_name","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
-{"event":"exit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
-{"event":"atexit","sid":"1547659722619736-11614","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
+{"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
+{"event":"start","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
+{"event":"cmd_name","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
+{"event":"exit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
+{"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
------------
== Enabling a Target
@@ -540,11 +540,11 @@ The following key/value pairs are common to all events:
------------
{
"event":"version",
- "sid":"1547659722619736-11614",
+ "sid":"20190408T191827.272759Z-H9b68c35f-P011764",
"thread":"main",
- "time":"2019-01-16T17:28:42.620713Z",
+ "time":"2019-04-08T19:18:27.282761Z",
"file":"common-main.c",
- "line":38,
+ "line":42,
...
}
------------
diff --git a/trace2/tr2_sid.c b/trace2/tr2_sid.c
index 984524a43c..5047095478 100644
--- a/trace2/tr2_sid.c
+++ b/trace2/tr2_sid.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "trace2/tr2_tbuf.h"
#include "trace2/tr2_sid.h"
#define TR2_ENVVAR_PARENT_SID "GIT_TR2_PARENT_SID"
@@ -6,6 +7,53 @@
static struct strbuf tr2sid_buf = STRBUF_INIT;
static int tr2sid_nr_git_parents;
+/*
+ * Compute the final component of the SID representing the current process.
+ * This should uniquely identify the process and be a valid filename (to
+ * allow writing trace2 data to per-process files). It should also be fixed
+ * length for possible use as a database key.
+ *
+ * "<yyyymmdd>T<hhmmss>.<fraction>Z-<host>-<process>"
+ *
+ * where <host> is a 9 character string:
+ * "H<first_8_chars_of_sha1_of_hostname>"
+ * "Localhost" when no hostname.
+ *
+ * where <process> is a 9 character string containing the least signifcant
+ * 32 bits in the process-id.
+ * "P<pid>"
+ * (This is an abribrary choice. On most systems pid_t is a 32 bit value,
+ * so limit doesn't matter. On larger systems, a truncated value is fine
+ * for our purposes here.)
+ */
+static void tr2_sid_append_my_sid_component(void)
+{
+ const struct git_hash_algo *algo = &hash_algos[GIT_HASH_SHA1];
+ struct tr2_tbuf tb_now;
+ git_hash_ctx ctx;
+ pid_t pid = getpid();
+ unsigned char hash[GIT_MAX_RAWSZ + 1];
+ char hex[GIT_MAX_HEXSZ + 1];
+ char hostname[HOST_NAME_MAX + 1];
+
+ tr2_tbuf_utc_datetime(&tb_now);
+ strbuf_addstr(&tr2sid_buf, tb_now.buf);
+
+ strbuf_addch(&tr2sid_buf, '-');
+ if (xgethostname(hostname, sizeof(hostname)))
+ strbuf_add(&tr2sid_buf, "Localhost", 9);
+ else {
+ algo->init_fn(&ctx);
+ algo->update_fn(&ctx, hostname, strlen(hostname));
+ algo->final_fn(hash, &ctx);
+ hash_to_hex_algop_r(hex, hash, algo);
+ strbuf_addch(&tr2sid_buf, 'H');
+ strbuf_add(&tr2sid_buf, hex, 8);
+ }
+
+ strbuf_addf(&tr2sid_buf, "-P%08"PRIx32, (uint32_t)pid);
+}
+
/*
* Compute a "unique" session id (SID) for the current process. This allows
* all events from this process to have a single label (much like a PID).
@@ -20,7 +68,6 @@ static int tr2sid_nr_git_parents;
*/
static void tr2_sid_compute(void)
{
- uint64_t us_now;
const char *parent_sid;
if (tr2sid_buf.len)
@@ -38,9 +85,7 @@ static void tr2_sid_compute(void)
tr2sid_nr_git_parents++;
}
- us_now = getnanotime() / 1000;
- strbuf_addf(&tr2sid_buf, "%" PRIuMAX "-%" PRIdMAX, (uintmax_t)us_now,
- (intmax_t)getpid());
+ tr2_sid_append_my_sid_component();
setenv(TR2_ENVVAR_PARENT_SID, tr2sid_buf.buf, 1);
}
diff --git a/trace2/tr2_tbuf.c b/trace2/tr2_tbuf.c
index eb1b240d8a..2498482d9a 100644
--- a/trace2/tr2_tbuf.c
+++ b/trace2/tr2_tbuf.c
@@ -30,3 +30,18 @@ void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb)
tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec,
(long)tv.tv_usec);
}
+
+void tr2_tbuf_utc_datetime(struct tr2_tbuf *tb)
+{
+ struct timeval tv;
+ struct tm tm;
+ time_t secs;
+
+ gettimeofday(&tv, NULL);
+ secs = tv.tv_sec;
+ gmtime_r(&secs, &tm);
+
+ xsnprintf(tb->buf, sizeof(tb->buf), "%4d%02d%02dT%02d%02d%02d.%06ldZ",
+ tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour,
+ tm.tm_min, tm.tm_sec, (long)tv.tv_usec);
+}
diff --git a/trace2/tr2_tbuf.h b/trace2/tr2_tbuf.h
index 2a1d173ff2..fa853d8f42 100644
--- a/trace2/tr2_tbuf.h
+++ b/trace2/tr2_tbuf.h
@@ -19,5 +19,6 @@ void tr2_tbuf_local_time(struct tr2_tbuf *tb);
* Fill buffer with formatted UTC datatime string.
*/
void tr2_tbuf_utc_datetime_extended(struct tr2_tbuf *tb);
+void tr2_tbuf_utc_datetime(struct tr2_tbuf *tb);
#endif /* TR2_TBUF_H */
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 10/11] trace2: update docs to describe system/global config settings
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
` (8 preceding siblings ...)
2019-04-29 20:14 ` [PATCH v5 09/11] trace2: make SIDs more unique Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:14 ` [PATCH v5 11/11] trace2: fixup access problem on /etc/gitconfig in read_very_early_config Jeff Hostetler via GitGitGadget
2019-04-29 20:21 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
Documentation/config.txt | 2 +
Documentation/config/trace2.txt | 56 +++++++++
Documentation/technical/api-trace2.txt | 151 ++++++++++++++-----------
Documentation/trace2-target-values.txt | 10 ++
4 files changed, 152 insertions(+), 67 deletions(-)
create mode 100644 Documentation/config/trace2.txt
create mode 100644 Documentation/trace2-target-values.txt
diff --git a/Documentation/config.txt b/Documentation/config.txt
index d87846faa6..7e2a6f61f5 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -422,6 +422,8 @@ include::config/submodule.txt[]
include::config/tag.txt[]
+include::config/trace2.txt[]
+
include::config/transfer.txt[]
include::config/uploadarchive.txt[]
diff --git a/Documentation/config/trace2.txt b/Documentation/config/trace2.txt
new file mode 100644
index 0000000000..a5f409c1c1
--- /dev/null
+++ b/Documentation/config/trace2.txt
@@ -0,0 +1,56 @@
+Trace2 config settings are only read from the system and global
+config files; repository local and worktree config files and `-c`
+command line arguments are not respected.
+
+trace2.normalTarget::
+ This variable controls the normal target destination.
+ It may be overridden by the `GIT_TR2` environment variable.
+ The following table shows possible values.
+
+trace2.perfTarget::
+ This variable controls the performance target destination.
+ It may be overridden by the `GIT_TR2_PERF` environment variable.
+ The following table shows possible values.
+
+trace2.eventTarget::
+ This variable controls the event target destination.
+ It may be overridden by the `GIT_TR2_EVENT` environment variable.
+ The following table shows possible values.
++
+include::../trace2-target-values.txt[]
+
+trace2.normalBrief::
+ Boolean. When true `time`, `filename`, and `line` fields are
+ omitted from normal output. May be overridden by the
+ `GIT_TR2_BRIEF` environment variable. Defaults to false.
+
+trace2.perfBrief::
+ Boolean. When true `time`, `filename`, and `line` fields are
+ omitted from PERF output. May be overridden by the
+ `GIT_TR2_PERF_BRIEF` environment variable. Defaults to false.
+
+trace2.eventBrief::
+ Boolean. When true `time`, `filename`, and `line` fields are
+ omitted from event output. May be overridden by the
+ `GIT_TR2_EVENT_BRIEF` environment variable. Defaults to false.
+
+trace2.eventNesting::
+ Integer. Specifies desired depth of nested regions in the
+ event output. Regions deeper than this value will be
+ omitted. May be overridden by the `GIT_TR2_EVENT_NESTING`
+ environment variable. Defaults to 2.
+
+trace2.configParams::
+ A comma-separated list of patterns of "important" config
+ settings that should be recorded in the trace2 output.
+ For example, `core.*,remote.*.url` would cause the trace2
+ output to contain events listing each configured remote.
+ May be overridden by the `GIT_TR2_CONFIG_PARAMS` environment
+ variable. Unset by default.
+
+trace2.destinationDebug::
+ Boolean. When true Git will print error messages when a
+ trace target destination cannot be opened for writing.
+ By default, these errors are suppressed and tracing is
+ silently disabled. May be overridden by the
+ `GIT_TR2_DST_DEBUG` environment variable.
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index 43adbf00eb..8b6a5e6d4b 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -22,21 +22,41 @@ Targets are defined using a VTable allowing easy extension to other
formats in the future. This might be used to define a binary format,
for example.
+Trace2 is controlled using `trace2.*` config values in the system and
+global config files and `GIT_TR2*` environment variables. Trace2 does
+not read from repo local or worktree config files or respect `-c`
+command line config settings.
+
== Trace2 Targets
Trace2 defines the following set of Trace2 Targets.
Format details are given in a later section.
-`GIT_TR2` (NORMAL)::
+=== The Normal Format Target
+
+The normal format target is a tradition printf format and similar
+to GIT_TRACE format. This format is enabled with the `GIT_TR`
+environment variable or the `trace2.normalTarget` system or global
+config setting.
+
+For example
- a simple printf format like GIT_TRACE.
-+
------------
$ export GIT_TR2=~/log.normal
$ git version
git version 2.20.1.155.g426c96fcdb
------------
-+
+
+or
+
+------------
+$ git config --global trace2.normalTarget ~/log.normal
+$ git version
+git version 2.20.1.155.g426c96fcdb
+------------
+
+yields
+
------------
$ cat ~/log.normal
12:28:42.620009 common-main.c:38 version 2.20.1.155.g426c96fcdb
@@ -46,17 +66,32 @@ $ cat ~/log.normal
12:28:42.621250 trace2/tr2_tgt_normal.c:124 atexit elapsed:0.001265 code:0
------------
-`GIT_TR2_PERF` (PERF)::
+=== The Performance Format Target
+
+The performance format target (PERF) is a column-based format to
+replace GIT_TRACE_PERFORMANCE and is suitable for development and
+testing, possibly to complement tools like gprof. This format is
+enabled with the `GIT_TR2_PERF` environment variable or the
+`trace2.perfTarget` system or global config setting.
+
+For example
- a column-based format to replace GIT_TRACE_PERFORMANCE suitable for
- development and testing, possibly to complement tools like gprof.
-+
------------
$ export GIT_TR2_PERF=~/log.perf
$ git version
git version 2.20.1.155.g426c96fcdb
------------
-+
+
+or
+
+------------
+$ git config --global trace2.perfTarget ~/log.perf
+$ git version
+git version 2.20.1.155.g426c96fcdb
+------------
+
+yields
+
------------
$ cat ~/log.perf
12:28:42.620675 common-main.c:38 | d0 | main | version | | | | | 2.20.1.155.g426c96fcdb
@@ -66,56 +101,46 @@ $ cat ~/log.perf
12:28:42.621259 trace2/tr2_tgt_perf.c:211 | d0 | main | atexit | | 0.001265 | | | code:0
------------
-`GIT_TR2_EVENT` (EVENT)::
+=== The Event Format Target
+
+The event format target is a JSON-based format of event data suitable
+for telemetry analysis. This format is enabled with the `GIT_TR2_EVENT`
+environment variable or the `trace2.eventTarget` system or global config
+setting.
+
+For example
- a JSON-based format of event data suitable for telemetry analysis.
-+
------------
$ export GIT_TR2_EVENT=~/log.event
$ git version
git version 2.20.1.155.g426c96fcdb
------------
-+
-------------
-$ cat ~/log.event
-{"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
-{"event":"start","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
-{"event":"cmd_name","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
-{"event":"exit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
-{"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P028492","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
-------------
-
-== Enabling a Target
-
-A Trace2 Target is enabled when the corresponding environment variable
-(`GIT_TR2`, `GIT_TR2_PERF`, or `GIT_TR2_EVENT`) is set. The following
-values are recognized.
-
-`0`::
-`false`::
-
- Disables the target.
-`1`::
-`true`::
+or
- Enables the target and writes stream to `STDERR`.
-
-`[2-9]`::
+------------
+$ git config --global trace2.eventTarget ~/log.event
+$ git version
+git version 2.20.1.155.g426c96fcdb
+------------
- Enables the target and writes to the already opened file descriptor.
+yields
-`<absolute-pathname>`::
+------------
+$ cat ~/log.event
+{"event":"version","sid":"sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.620713Z","file":"common-main.c","line":38,"evt":"1","exe":"2.20.1.155.g426c96fcdb"}
+{"event":"start","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621027Z","file":"common-main.c","line":39,"t_abs":0.001173,"argv":["git","version"]}
+{"event":"cmd_name","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621122Z","file":"git.c","line":432,"name":"version","hierarchy":"version"}
+{"event":"exit","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621236Z","file":"git.c","line":662,"t_abs":0.001227,"code":0}
+{"event":"atexit","sid":"20190408T191610.507018Z-H9b68c35f-P000059a8","thread":"main","time":"2019-01-16T17:28:42.621268Z","file":"trace2/tr2_tgt_event.c","line":163,"t_abs":0.001265,"code":0}
+------------
- Enables the target, opens and writes to the file in append mode.
+=== Enabling a Target
-`af_unix:[<socket_type>:]<absolute-pathname>`::
+To enable a target, set the corresponding environment variable or
+system or global config value to one of the following:
- Enables the target, opens and writes to a Unix Domain Socket
- (on platforms that support them).
-+
-Socket type can be either `stream` or `dgram`. If the socket type is
-omitted, Git will try both.
+include::../trace2-target-values.txt[]
== Trace2 API
@@ -243,15 +268,16 @@ significantly affects program performance or behavior, such as
Emits a "def_param" messages for "important" configuration
settings.
+
-The environment variable `GIT_TR2_CONFIG_PARAMS` can be set to a
+The environment variable `GIT_TR2_CONFIG_PARAMS` or the `trace2.configParams`
+config value can be set to a
list of patterns of important configuration settings, for example:
`core.*,remote.*.url`. This function will iterate over all config
settings and emit a "def_param" message for each match.
`void trace2_cmd_set_config(const char *key, const char *value)`::
- Emits a "def_param" message for a specific configuration
- setting IFF it matches the `GIT_TR2_CONFIG_PARAMS` pattern.
+ Emits a "def_param" message for a new or updated key/value
+ pair IF `key` is considered important.
+
This is used to hook into `git_config_set()` and catch any
configuration changes and update a value previously reported by
@@ -418,9 +444,6 @@ recursive tree walk.
=== NORMAL Format
-NORMAL format is enabled when the `GIT_TR2` environment variable is
-set.
-
Events are written as lines of the form:
------------
@@ -437,8 +460,8 @@ Events are written as lines of the form:
Note that this may contain embedded LF or CRLF characters that are
not escaped, so the event may spill across multiple lines.
-If `GIT_TR2_BRIEF` is true, the `time`, `filename`, and `line` fields
-are omitted.
+If `GIT_TR2_BRIEF` or `trace2.normalBrief` is true, the `time`, `filename`,
+and `line` fields are omitted.
This target is intended to be more of a summary (like GIT_TRACE) and
less detailed than the other targets. It ignores thread, region, and
@@ -446,9 +469,6 @@ data messages, for example.
=== PERF Format
-PERF format is enabled when the `GIT_TR2_PERF` environment variable
-is set.
-
Events are written as lines of the form:
------------
@@ -508,8 +528,8 @@ This field is in anticipation of in-proc submodules in the future.
15:33:33.532712 wt-status.c:2331 | d0 | main | region_leave | r1 | 0.127568 | 0.001504 | status | label:print
------------
-If `GIT_TR2_PERF_BRIEF` is true, the `time`, `file`, and `line`
-fields are omitted.
+If `GIT_TR2_PERF_BRIEF` or `trace2.perfBrief` is true, the `time`, `file`,
+and `line` fields are omitted.
------------
d0 | main | region_leave | r1 | 0.011717 | 0.009122 | index | label:preload
@@ -520,9 +540,6 @@ during development and is quite noisy.
=== EVENT Format
-EVENT format is enabled when the `GIT_TR2_EVENT` environment
-variable is set.
-
Each event is a JSON-object containing multiple key/value pairs
written as a single line and followed by a LF.
@@ -540,7 +557,7 @@ The following key/value pairs are common to all events:
------------
{
"event":"version",
- "sid":"20190408T191827.272759Z-H9b68c35f-P011764",
+ "sid":"20190408T191827.272759Z-H9b68c35f-P00003510",
"thread":"main",
"time":"2019-04-08T19:18:27.282761Z",
"file":"common-main.c",
@@ -576,9 +593,9 @@ The following key/value pairs are common to all events:
`"repo":<repo-id>`::
when present, is the integer repo-id as described previously.
-If `GIT_TR2_EVENT_BRIEF` is true, the `file` and `line` fields are omitted
-from all events and the `time` field is only present on the "start" and
-"atexit" events.
+If `GIT_TR2_EVENT_BRIEF` or `trace2.eventBrief` is true, the `file`
+and `line` fields are omitted from all events and the `time` field is
+only present on the "start" and "atexit" events.
==== Event-Specific Key/Value Pairs
@@ -889,7 +906,7 @@ visited.
The `category` field may be used in a future enhancement to
do category-based filtering.
+
-The `GIT_TR2_EVENT_NESTING` environment variable can be used to
+`GIT_TR2_EVENT_NESTING` or `trace2.eventNesting` can be used to
filter deeply nested regions and data events. It defaults to "2".
`"region_leave"`::
diff --git a/Documentation/trace2-target-values.txt b/Documentation/trace2-target-values.txt
new file mode 100644
index 0000000000..27d3c64e66
--- /dev/null
+++ b/Documentation/trace2-target-values.txt
@@ -0,0 +1,10 @@
+--
+* `0` or `false` - Disables the target.
+* `1` or `true` - Writes to `STDERR`.
+* `[2-9]` - Writes to the already opened file descriptor.
+* `<absolute-pathname>` - Writes to the file in append mode.
+* `af_unix:[<socket_type>:]<absolute-pathname>` - Write to a
+Unix DomainSocket (on platforms that support them). Socket
+type can be either `stream` or `dgram`; if omitted Git will
+try both.
+--
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* [PATCH v5 11/11] trace2: fixup access problem on /etc/gitconfig in read_very_early_config
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
` (9 preceding siblings ...)
2019-04-29 20:14 ` [PATCH v5 10/11] trace2: update docs to describe system/global config settings Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:14 ` Jeff Hostetler via GitGitGadget
2019-04-29 20:21 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler
11 siblings, 0 replies; 68+ messages in thread
From: Jeff Hostetler via GitGitGadget @ 2019-04-29 20:14 UTC (permalink / raw)
To: git
Cc: gitster, peff, jrnieder, steadmon, avarab, Junio C Hamano,
Jeff Hostetler
From: Jeff Hostetler <jeffhost@microsoft.com>
Teach do_git_config_sequence() to optionally gently check for access to
the system config. Use this option in read_very_early_config() when
initializing trace2.
In [1] SZEDER Gábor reported that my changes in [2] introduced a
regression when the user does not have permission to read the system
config.
This commit addresses that problem by optionally ignoring that error.
[1] https://public-inbox.org/git/285beb2b2d740ce20fdd8af1becf371ab39703db.1554995916.git.gitgitgadget@gmail.com/T/#m342e839289aec515523a98b5e34d7f42d3f1fd79
[2] https://public-inbox.org/git/285beb2b2d740ce20fdd8af1becf371ab39703db.1554995916.git.gitgitgadget@gmail.com/T/#m11b59c9228c698442f750ee8f9b10c629399ae48
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
config.c | 5 ++++-
config.h | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/config.c b/config.c
index d7a08713a8..3f5ad9dc3c 100644
--- a/config.c
+++ b/config.c
@@ -1676,7 +1676,9 @@ static int do_git_config_sequence(const struct config_options *opts,
repo_config = NULL;
current_parsing_scope = CONFIG_SCOPE_SYSTEM;
- if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
+ if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK,
+ opts->system_gently ?
+ ACCESS_EACCES_OK : 0))
ret += git_config_from_file(fn, git_etc_gitconfig(),
data);
@@ -1807,6 +1809,7 @@ void read_very_early_config(config_fn_t cb, void *data)
opts.ignore_repo = 1;
opts.ignore_worktree = 1;
opts.ignore_cmdline = 1;
+ opts.system_gently = 1;
config_with_options(cb, data, NULL, &opts);
}
diff --git a/config.h b/config.h
index 6a58d61d22..36bb23a9d9 100644
--- a/config.h
+++ b/config.h
@@ -58,6 +58,7 @@ struct config_options {
unsigned int ignore_repo : 1;
unsigned int ignore_worktree : 1;
unsigned int ignore_cmdline : 1;
+ unsigned int system_gently : 1;
const char *commondir;
const char *git_dir;
config_parser_event_fn_t event_fn;
--
gitgitgadget
^ permalink raw reply related [flat|nested] 68+ messages in thread
* Re: [PATCH v5 00/11] trace2: load trace2 settings from system config
2019-04-29 20:14 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler via GitGitGadget
` (10 preceding siblings ...)
2019-04-29 20:14 ` [PATCH v5 11/11] trace2: fixup access problem on /etc/gitconfig in read_very_early_config Jeff Hostetler via GitGitGadget
@ 2019-04-29 20:21 ` Jeff Hostetler
2019-05-07 1:18 ` Junio C Hamano
11 siblings, 1 reply; 68+ messages in thread
From: Jeff Hostetler @ 2019-04-29 20:21 UTC (permalink / raw)
To: Jeff Hostetler via GitGitGadget, git
Cc: gitster, peff, jrnieder, steadmon, avarab
I forgot to update the cover letter for V5.
V5 adds a commit to fix the permission problem in /etc/gitconfig
reported by SZEDER.
This commit could/should be squashed into commit 5 if wanted.
I left it on top for review purposes.
Jeff
On 4/29/2019 4:14 PM, Jeff Hostetler via GitGitGadget wrote:
> Version 4 fixes a few clang-format warnings and simplifies the PID field in
> the SID.
>
> Jeff Hostetler (11):
> config: initialize opts structure in repo_read_config()
> trace2: refactor setting process starting time
> trace2: add absolute elapsed time to start event
> trace2: find exec-dir before trace2 initialization
> config: add read_very_early_config()
> trace2: use system/global config for default trace2 settings
> trace2: report peak memory usage of the process
> trace2: clarify UTC datetime formatting
> trace2: make SIDs more unique
> trace2: update docs to describe system/global config settings
> trace2: fixup access problem on /etc/gitconfig in
> read_very_early_config
>
> Documentation/config.txt | 2 +
> Documentation/config/trace2.txt | 56 ++++++++
> Documentation/technical/api-trace2.txt | 176 +++++++++++++----------
> Documentation/trace2-target-values.txt | 10 ++
> Makefile | 1 +
> common-main.c | 8 +-
> compat/mingw.c | 2 +
> compat/win32/trace2_win32_process_info.c | 50 ++++++-
> config.c | 30 +++-
> config.h | 5 +
> t/t0210-trace2-normal.sh | 49 ++++++-
> t/t0211-trace2-perf.sh | 43 ++++--
> t/t0212-trace2-event.sh | 42 +++++-
> trace2.c | 21 ++-
> trace2.h | 43 ++++--
> trace2/tr2_cfg.c | 7 +-
> trace2/tr2_dst.c | 26 ++--
> trace2/tr2_dst.h | 3 +-
> trace2/tr2_sid.c | 53 ++++++-
> trace2/tr2_sysenv.c | 127 ++++++++++++++++
> trace2/tr2_sysenv.h | 36 +++++
> trace2/tr2_tbuf.c | 19 ++-
> trace2/tr2_tbuf.h | 5 +-
> trace2/tr2_tgt.h | 1 +
> trace2/tr2_tgt_event.c | 53 +++----
> trace2/tr2_tgt_normal.c | 19 +--
> trace2/tr2_tgt_perf.c | 23 +--
> trace2/tr2_tls.c | 38 +++--
> trace2/tr2_tls.h | 8 +-
> 29 files changed, 752 insertions(+), 204 deletions(-)
> create mode 100644 Documentation/config/trace2.txt
> create mode 100644 Documentation/trace2-target-values.txt
> create mode 100644 trace2/tr2_sysenv.c
> create mode 100644 trace2/tr2_sysenv.h
>
>
> base-commit: 041f5ea1cf987a4068ef5f39ba0a09be85952064
> Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-169%2Fjeffhostetler%2Fcore-tr2-startup-and-sysenv-v5
> Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-169/jeffhostetler/core-tr2-startup-and-sysenv-v5
> Pull-Request: https://github.com/gitgitgadget/git/pull/169
>
> Range-diff vs v4:
>
> 1: f6653f1c59 = 1: f6653f1c59 config: initialize opts structure in repo_read_config()
> 2: 48e34834b6 = 2: 48e34834b6 trace2: refactor setting process starting time
> 3: 175371fb54 = 3: 175371fb54 trace2: add absolute elapsed time to start event
> 4: 94729b284c = 4: 94729b284c trace2: find exec-dir before trace2 initialization
> 5: b0fe1385f1 = 5: b0fe1385f1 config: add read_very_early_config()
> 6: 550cad6189 = 6: 550cad6189 trace2: use system/global config for default trace2 settings
> 7: 56d8ce3fd6 = 7: 56d8ce3fd6 trace2: report peak memory usage of the process
> 8: 196a9d2c85 = 8: 196a9d2c85 trace2: clarify UTC datetime formatting
> 9: 9fdcb50140 = 9: 9fdcb50140 trace2: make SIDs more unique
> 10: 3414016d04 = 10: 3414016d04 trace2: update docs to describe system/global config settings
> -: ---------- > 11: 18ce795360 trace2: fixup access problem on /etc/gitconfig in read_very_early_config
>
^ permalink raw reply [flat|nested] 68+ messages in thread
* Re: [PATCH v5 00/11] trace2: load trace2 settings from system config
2019-04-29 20:21 ` [PATCH v5 00/11] trace2: load trace2 settings from system config Jeff Hostetler
@ 2019-05-07 1:18 ` Junio C Hamano
0 siblings, 0 replies; 68+ messages in thread
From: Junio C Hamano @ 2019-05-07 1:18 UTC (permalink / raw)
To: Jeff Hostetler
Cc: Jeff Hostetler via GitGitGadget, git, peff, jrnieder, steadmon, avarab
Jeff Hostetler <git@jeffhostetler.com> writes:
> I forgot to update the cover letter for V5.
> V5 adds a commit to fix the permission problem in /etc/gitconfig
> reported by SZEDER.
>
> This commit could/should be squashed into commit 5 if wanted.
> I left it on top for review purposes.
I think v4 has been in 'next' for several days already, so an
incremental update like PATCH 11/11 is good. The first 10 patches
are identical to the previous round, so all is good ;-)
^ permalink raw reply [flat|nested] 68+ messages in thread