* [PATCH] perf sched timehist: Add support for filtering on CPU
@ 2019-12-04 17:39 David Ahern
2019-12-04 19:28 ` Arnaldo Carvalho de Melo
2020-01-10 17:53 ` [tip: perf/core] " tip-bot2 for David Ahern
0 siblings, 2 replies; 3+ messages in thread
From: David Ahern @ 2019-12-04 17:39 UTC (permalink / raw)
To: acme; +Cc: namhyung, jolsa, linux-kernel, linux-perf-users, David Ahern
From: David Ahern <dsahern@gmail.com>
Allow user to limit output to one or more CPUs. Really helpful on systems
with a large number of cpus.
Signed-off-by: David Ahern <dsahern@gmail.com>
---
tools/perf/Documentation/perf-sched.txt | 4 ++++
tools/perf/builtin-sched.c | 13 +++++++++++++
2 files changed, 17 insertions(+)
diff --git a/tools/perf/Documentation/perf-sched.txt b/tools/perf/Documentation/perf-sched.txt
index 63f938b887dd..5fbe42bd599b 100644
--- a/tools/perf/Documentation/perf-sched.txt
+++ b/tools/perf/Documentation/perf-sched.txt
@@ -110,6 +110,10 @@ OPTIONS for 'perf sched timehist'
--max-stack::
Maximum number of functions to display in backtrace, default 5.
+-C=::
+--cpu=::
+ Only show events for the given CPU(s) (comma separated list).
+
-p=::
--pid=::
Only show events for given process ID (comma separated list).
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 8a12d71364c3..82fcc2c15fe4 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -51,6 +51,9 @@
#define SYM_LEN 129
#define MAX_PID 1024000
+static const char *cpu_list;
+static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
+
struct sched_atom;
struct task_desc {
@@ -2008,6 +2011,9 @@ static void timehist_print_sample(struct perf_sched *sched,
char nstr[30];
u64 wait_time;
+ if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
+ return;
+
timestamp__scnprintf_usec(t, tstr, sizeof(tstr));
printf("%15s [%04d] ", tstr, sample->cpu);
@@ -2994,6 +3000,12 @@ static int perf_sched__timehist(struct perf_sched *sched)
if (IS_ERR(session))
return PTR_ERR(session);
+ if (cpu_list) {
+ err = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap);
+ if (err < 0)
+ goto out;
+ }
+
evlist = session->evlist;
symbol__init(&session->header.env);
@@ -3429,6 +3441,7 @@ int cmd_sched(int argc, const char **argv)
"analyze events only for given process id(s)"),
OPT_STRING('t', "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
"analyze events only for given thread id(s)"),
+ OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
OPT_PARENT(sched_options)
};
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] perf sched timehist: Add support for filtering on CPU
2019-12-04 17:39 [PATCH] perf sched timehist: Add support for filtering on CPU David Ahern
@ 2019-12-04 19:28 ` Arnaldo Carvalho de Melo
2020-01-10 17:53 ` [tip: perf/core] " tip-bot2 for David Ahern
1 sibling, 0 replies; 3+ messages in thread
From: Arnaldo Carvalho de Melo @ 2019-12-04 19:28 UTC (permalink / raw)
To: David Ahern; +Cc: namhyung, jolsa, linux-kernel, linux-perf-users, David Ahern
Em Wed, Dec 04, 2019 at 10:39:25AM -0700, David Ahern escreveu:
> From: David Ahern <dsahern@gmail.com>
>
> Allow user to limit output to one or more CPUs. Really helpful on systems
> with a large number of cpus.
Thanks, tested and applied to perf/core, for 5.6.
- Arnaldo
> Signed-off-by: David Ahern <dsahern@gmail.com>
> ---
> tools/perf/Documentation/perf-sched.txt | 4 ++++
> tools/perf/builtin-sched.c | 13 +++++++++++++
> 2 files changed, 17 insertions(+)
>
> diff --git a/tools/perf/Documentation/perf-sched.txt b/tools/perf/Documentation/perf-sched.txt
> index 63f938b887dd..5fbe42bd599b 100644
> --- a/tools/perf/Documentation/perf-sched.txt
> +++ b/tools/perf/Documentation/perf-sched.txt
> @@ -110,6 +110,10 @@ OPTIONS for 'perf sched timehist'
> --max-stack::
> Maximum number of functions to display in backtrace, default 5.
>
> +-C=::
> +--cpu=::
> + Only show events for the given CPU(s) (comma separated list).
> +
> -p=::
> --pid=::
> Only show events for given process ID (comma separated list).
> diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
> index 8a12d71364c3..82fcc2c15fe4 100644
> --- a/tools/perf/builtin-sched.c
> +++ b/tools/perf/builtin-sched.c
> @@ -51,6 +51,9 @@
> #define SYM_LEN 129
> #define MAX_PID 1024000
>
> +static const char *cpu_list;
> +static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
> +
> struct sched_atom;
>
> struct task_desc {
> @@ -2008,6 +2011,9 @@ static void timehist_print_sample(struct perf_sched *sched,
> char nstr[30];
> u64 wait_time;
>
> + if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
> + return;
> +
> timestamp__scnprintf_usec(t, tstr, sizeof(tstr));
> printf("%15s [%04d] ", tstr, sample->cpu);
>
> @@ -2994,6 +3000,12 @@ static int perf_sched__timehist(struct perf_sched *sched)
> if (IS_ERR(session))
> return PTR_ERR(session);
>
> + if (cpu_list) {
> + err = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap);
> + if (err < 0)
> + goto out;
> + }
> +
> evlist = session->evlist;
>
> symbol__init(&session->header.env);
> @@ -3429,6 +3441,7 @@ int cmd_sched(int argc, const char **argv)
> "analyze events only for given process id(s)"),
> OPT_STRING('t', "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
> "analyze events only for given thread id(s)"),
> + OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
> OPT_PARENT(sched_options)
> };
>
> --
> 2.20.1
--
- Arnaldo
^ permalink raw reply [flat|nested] 3+ messages in thread
* [tip: perf/core] perf sched timehist: Add support for filtering on CPU
2019-12-04 17:39 [PATCH] perf sched timehist: Add support for filtering on CPU David Ahern
2019-12-04 19:28 ` Arnaldo Carvalho de Melo
@ 2020-01-10 17:53 ` tip-bot2 for David Ahern
1 sibling, 0 replies; 3+ messages in thread
From: tip-bot2 for David Ahern @ 2020-01-10 17:53 UTC (permalink / raw)
To: linux-tip-commits
Cc: David Ahern, Arnaldo Carvalho de Melo, Jiri Olsa, Namhyung Kim,
x86, LKML
The following commit has been merged into the perf/core branch of tip:
Commit-ID: c30d630d1bcfad8d2f70ff0cbb2a86d5a43bc152
Gitweb: https://git.kernel.org/tip/c30d630d1bcfad8d2f70ff0cbb2a86d5a43bc152
Author: David Ahern <dsahern@gmail.com>
AuthorDate: Wed, 04 Dec 2019 10:39:25 -07:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Mon, 06 Jan 2020 11:46:09 -03:00
perf sched timehist: Add support for filtering on CPU
Allow user to limit output to one or more CPUs. Really helpful on
systems with a large number of cpus.
Committer testing:
# perf sched record -a sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.765 MB perf.data (1412 samples) ]
[root@quaco ~]# perf sched timehist | head
Samples do not have callchains.
time cpu task name wait time sch delay run time
[tid/pid] (msec) (msec) (msec)
--------------- ------ ------------------------------ --------- --------- ---------
66307.802686 [0000] perf[13086] 0.000 0.000 0.000
66307.802700 [0000] migration/0[12] 0.000 0.001 0.014
66307.802766 [0001] perf[13086] 0.000 0.000 0.000
66307.802774 [0001] migration/1[15] 0.000 0.001 0.007
66307.802841 [0002] perf[13086] 0.000 0.000 0.000
66307.802849 [0002] migration/2[20] 0.000 0.001 0.008
66307.802913 [0003] perf[13086] 0.000 0.000 0.000
#
# perf sched timehist --cpu 2 | head
Samples do not have callchains.
time cpu task name wait time sch delay run time
[tid/pid] (msec) (msec) (msec)
--------------- ------ ------------------------------ --------- --------- ---------
66307.802841 [0002] perf[13086] 0.000 0.000 0.000
66307.802849 [0002] migration/2[20] 0.000 0.001 0.008
66307.964485 [0002] <idle> 0.000 0.000 161.635
66307.964811 [0002] CPU 0/KVM[3589/3561] 0.000 0.056 0.325
66307.965477 [0002] <idle> 0.325 0.000 0.666
66307.965553 [0002] CPU 0/KVM[3589/3561] 0.666 0.024 0.076
66307.966456 [0002] <idle> 0.076 0.000 0.903
#
Signed-off-by: David Ahern <dsahern@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/20191204173925.66976-1-dsahern@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/perf-sched.txt | 4 ++++
tools/perf/builtin-sched.c | 13 +++++++++++++
2 files changed, 17 insertions(+)
diff --git a/tools/perf/Documentation/perf-sched.txt b/tools/perf/Documentation/perf-sched.txt
index 63f938b..5fbe42b 100644
--- a/tools/perf/Documentation/perf-sched.txt
+++ b/tools/perf/Documentation/perf-sched.txt
@@ -110,6 +110,10 @@ OPTIONS for 'perf sched timehist'
--max-stack::
Maximum number of functions to display in backtrace, default 5.
+-C=::
+--cpu=::
+ Only show events for the given CPU(s) (comma separated list).
+
-p=::
--pid=::
Only show events for given process ID (comma separated list).
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 8a12d71..82fcc2c 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -51,6 +51,9 @@
#define SYM_LEN 129
#define MAX_PID 1024000
+static const char *cpu_list;
+static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
+
struct sched_atom;
struct task_desc {
@@ -2008,6 +2011,9 @@ static void timehist_print_sample(struct perf_sched *sched,
char nstr[30];
u64 wait_time;
+ if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
+ return;
+
timestamp__scnprintf_usec(t, tstr, sizeof(tstr));
printf("%15s [%04d] ", tstr, sample->cpu);
@@ -2994,6 +3000,12 @@ static int perf_sched__timehist(struct perf_sched *sched)
if (IS_ERR(session))
return PTR_ERR(session);
+ if (cpu_list) {
+ err = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap);
+ if (err < 0)
+ goto out;
+ }
+
evlist = session->evlist;
symbol__init(&session->header.env);
@@ -3429,6 +3441,7 @@ int cmd_sched(int argc, const char **argv)
"analyze events only for given process id(s)"),
OPT_STRING('t', "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
"analyze events only for given thread id(s)"),
+ OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
OPT_PARENT(sched_options)
};
^ permalink raw reply related [flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-01-10 17:54 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-12-04 17:39 [PATCH] perf sched timehist: Add support for filtering on CPU David Ahern
2019-12-04 19:28 ` Arnaldo Carvalho de Melo
2020-01-10 17:53 ` [tip: perf/core] " tip-bot2 for David Ahern
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.