* [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build
@ 2016-10-04 13:35 Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 01/20] trace: move colo trace events to net/ sub-directory Daniel P. Berrange
` (22 more replies)
0 siblings, 23 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
These patches were previously posted as part of my giant
trace events modular build series
v1: https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01714.html
v2: https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03335.html
v3: https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg04282.html
v4: https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05467.html
v5: https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg07435.html
This series does all the refactoring required to support a fully
modular build of the trace probe points, but does not actually
convert anything to use it. The 40+ patches to convert each subdir
to use modular build will only be posted again, once the refactoring
is reviewed & queued, in order to avoid patch-bombing the list
more than is needed. The full series is visible at
https://github.com/berrange/qemu/tree/trace-events-6
The key problem being tackled by this series is the assumption
that there is a single statically declared enum which provides
globally unique event IDs. Inside QEMU the event IDs were used
as list indexes into the 'trace_events' array, while the event
VCPU IDs were used as bitmap indexes in trace_dstate against
the CPUState struct. Externally to QEMU, the event IDs were
also written in the simpletrace binary data format and used
to lookup the entry in the trace-events file afterwards.
Inside QEMU the refactoring work managed to remove all need
for event IDs for purposes of 'trace_events' array lookups.
Instead we now have global variables per-event which can be
referenced directly.
When QEMU starts up and the various event groups are registered,
we now dynamically assign event IDs and VCPU IDs to each event.
This removes the limitation in the v1 posting that all vCPU
events had to be in one file. We also removed the limitation
on the total number of vCPU events. So there is no regression
in functionality of VCPU event support compared to current
GIT master.
Since the event IDs are allocated dynamically at runtime,
the simpletrace.py script cannot assume they map directly
to the 'trace-events' file entries. Thus, the simpletrace
binary format is extended to include a record type that
maps trace event IDs to trace event names. While it would
be possible to take this even further and make the
simpletrace binary format 100% self-describing this is left
as an exercise for future developers, as it is not a
pre-requisite for this modular build.
While some of the intermediate patches may seem pointless
on their own, they exist in order to facilitate the review
of later patches by ensuring each patch does the minimum
possible refactoring work.
Changed in v6:
- Fix mixed up break vs return in event match (Lluís)
- Fixed indentation of generated code (Lluís)
- Unpack tuple return value (Stefan)
- Misc typos / docs formatting (Stefan / Lluís)
Changed in v5:
- Use single '_' instead of double/triple '_' in
constants (Lluís)
- Use more pythonic loop iterator (Lluís)
- Misc typos (Lluís/Stefan)
- Fix filtering of QMP trace events (Lluís)
- Fix some new mistakes in trace-events in master
Changed in v4:
- Misc typos / indentation (Lluís, Eric)
- Simplify do_trace_enable_events (Lluís)
- Use Event.api() in more places (Lluís)
- Actually delete events_{h,c}.py (Lluís)
- Use bitmap_new() for allocation (Lluís)
- Dont use .git to make relative path (Lluís)
Changed in v3:
- Change simpletrace format to write a mapping of
IDs to names
- Declare a TraceEvent variable per event, instead
of just an array
- Make 'trace_events' array be 'TraceEvent **'
instead of 'TraceEvent *'
- Fix infinite loop in iterators due to bad
fix in v2 posting.
- Dynamically allocate the trace_dstate variable
in CPUState based on actual number of vcpu events
registered at runtime
- Push logic for determining group name into the
tracetool program
- Fix to ftrace to make it more practical for users
who sometimes run QEMU as non-root.
- Get rid of TraceEventID/VCPUID enums entirely
Changed in v2:
- Fixed filtering of events on first call of
iterator_next (Stefan)
- Switch from size_t to uint32_t for event ID
type (Paolo/Stefan)
- Replace global 'dstate' array with individual
variables (Lluís)
Daniel P. Berrange (20):
trace: move colo trace events to net/ sub-directory
trace: remove double-underscore in event name
trace: add trace event iterator APIs
trace: convert code to use event iterators
trace: remove some now unused functions
trace: remove global 'uint16 dstate[]' array
trace: remove duplicate control.h includes in generated-tracers.h
trace: break circular dependency in event-internal.h
trace: give each trace event a named TraceEvent struct
trace: remove the TraceEventID and TraceEventVCPUID enums
trace: emit name <-> ID mapping in simpletrace header
trace: don't abort qemu if ftrace can't be initialized
trace: provide mechanism for registering trace events
trace: dynamically allocate trace_dstate in CPUState
trace: dynamically allocate event IDs at runtime
trace: get rid of generated-events.h/generated-events.c
trace: rename _read_events to read_events
trace: push reading of events up a level to tracetool main
trace: pass trace-events to tracetool as a positional param
trace: introduce a formal group name for trace events
Makefile | 3 -
Makefile.target | 6 +-
hw/scsi/spapr_vscsi.c | 2 +-
hw/scsi/trace-events | 2 +-
include/qemu/module.h | 2 +
include/qom/cpu.h | 9 +-
include/trace-tcg.h | 1 -
include/trace.h | 1 -
monitor.c | 26 ++---
net/trace-events | 16 +++
qemu-img.c | 1 +
qemu-io.c | 1 +
qemu-nbd.c | 1 +
qom/cpu.c | 7 +-
scripts/simpletrace.py | 56 +++++++----
scripts/tracetool.py | 20 +++-
scripts/tracetool/__init__.py | 28 ++++--
scripts/tracetool/backend/__init__.py | 12 +--
scripts/tracetool/backend/dtrace.py | 4 +-
scripts/tracetool/backend/ftrace.py | 5 +-
scripts/tracetool/backend/log.py | 7 +-
scripts/tracetool/backend/simple.py | 12 +--
scripts/tracetool/backend/syslog.py | 5 +-
scripts/tracetool/backend/ust.py | 4 +-
scripts/tracetool/format/__init__.py | 4 +-
scripts/tracetool/format/c.py | 56 +++++++++--
scripts/tracetool/format/d.py | 2 +-
scripts/tracetool/format/events_c.py | 44 --------
scripts/tracetool/format/events_h.py | 60 -----------
scripts/tracetool/format/h.py | 37 +++++--
scripts/tracetool/format/simpletrace_stap.py | 26 ++++-
scripts/tracetool/format/stap.py | 2 +-
scripts/tracetool/format/tcg_h.py | 8 +-
scripts/tracetool/format/tcg_helper_c.py | 2 +-
scripts/tracetool/format/tcg_helper_h.py | 2 +-
scripts/tracetool/format/tcg_helper_wrapper_h.py | 2 +-
scripts/tracetool/format/ust_events_c.py | 2 +-
scripts/tracetool/format/ust_events_h.py | 9 +-
stubs/trace-control.c | 9 +-
trace-events | 16 ---
trace/Makefile.objs | 46 +++------
trace/control-internal.h | 48 ++++-----
trace/control-target.c | 35 +++----
trace/control.c | 123 +++++++++++++++--------
trace/control.h | 112 +++++++--------------
trace/event-internal.h | 18 +++-
trace/ftrace.c | 6 ++
trace/qmp.c | 16 +--
trace/simple.c | 41 ++++++--
trace/simple.h | 6 +-
vl.c | 2 +
51 files changed, 502 insertions(+), 463 deletions(-)
delete mode 100644 scripts/tracetool/format/events_c.py
delete mode 100644 scripts/tracetool/format/events_h.py
--
2.7.4
^ permalink raw reply [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 01/20] trace: move colo trace events to net/ sub-directory
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 02/20] trace: remove double-underscore in event name Daniel P. Berrange
` (21 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
The colo patch series added various trace events to the top
level trace-events file, despite the files using them being
in a sub-dir.
commit 30656b097e9dd7978d3fe9416cb9f5a421a9e63e
Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Date: Tue Sep 27 10:22:34 2016 +0800
filter-rewriter: rewrite tcp packet to keep secondary connection
commit f4b618360e5a81b097e2e35d52011bec3c63af68
Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Date: Tue Sep 27 10:22:31 2016 +0800
colo-compare: add TCP, UDP, ICMP packet comparison
We add TCP,UDP,ICMP packet comparison to replace
IP packet comparison. This can increase the
accuracy of the package comparison.
Less checkpoint more efficiency.
Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
commit 0682e15b19b2f41c0568142b42518b9471168597
Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Date: Tue Sep 27 10:22:30 2016 +0800
colo-compare: introduce packet comparison thread
commit 59509ec16b7ee92b3f8261c554023aa1d3169317
Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Date: Tue Sep 27 10:22:27 2016 +0800
net/colo.c: add colo.c to define and handle packet
This moves all events into net/trace-events where they
were supposed to live.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
net/trace-events | 16 ++++++++++++++++
trace-events | 16 ----------------
2 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/net/trace-events b/net/trace-events
index 65c46a4..d67f048 100644
--- a/net/trace-events
+++ b/net/trace-events
@@ -2,3 +2,19 @@
# net/vhost-user.c
vhost_user_event(const char *chr, int event) "chr: %s got event: %d"
+
+# net/colo.c
+colo_proxy_main(const char *chr) ": %s"
+
+# net/colo-compare.c
+colo_compare_main(const char *chr) ": %s"
+colo_compare_udp_miscompare(const char *sta, int size) ": %s = %d"
+colo_compare_icmp_miscompare(const char *sta, int size) ": %s = %d"
+colo_compare_ip_info(int psize, const char *sta, const char *stb, int ssize, const char *stc, const char *std) "ppkt size = %d, ip_src = %s, ip_dst = %s, spkt size = %d, ip_src = %s, ip_dst = %s"
+colo_old_packet_check_found(int64_t old_time) "%" PRId64
+colo_compare_miscompare(void) ""
+
+# net/filter-rewriter.c
+colo_filter_rewriter_debug(void) ""
+colo_filter_rewriter_pkt_info(const char *func, const char *src, const char *dst, uint32_t seq, uint32_t ack, uint32_t flag) "%s: src/dst: %s/%s p: seq/ack=%u/%u flags=%x\n"
+colo_filter_rewriter_conn_offset(uint32_t offset) ": offset=%u\n"
diff --git a/trace-events b/trace-events
index 1a4e092..bd2199a 100644
--- a/trace-events
+++ b/trace-events
@@ -122,22 +122,6 @@ memory_region_subpage_write(int cpu_index, void *mr, uint64_t offset, uint64_t v
memory_region_tb_read(int cpu_index, uint64_t addr, uint64_t value, unsigned size) "cpu %d addr %#"PRIx64" value %#"PRIx64" size %u"
memory_region_tb_write(int cpu_index, uint64_t addr, uint64_t value, unsigned size) "cpu %d addr %#"PRIx64" value %#"PRIx64" size %u"
-# net/colo.c
-colo_proxy_main(const char *chr) ": %s"
-
-# net/colo-compare.c
-colo_compare_main(const char *chr) ": %s"
-colo_compare_udp_miscompare(const char *sta, int size) ": %s = %d"
-colo_compare_icmp_miscompare(const char *sta, int size) ": %s = %d"
-colo_compare_ip_info(int psize, const char *sta, const char *stb, int ssize, const char *stc, const char *std) "ppkt size = %d, ip_src = %s, ip_dst = %s, spkt size = %d, ip_src = %s, ip_dst = %s"
-colo_old_packet_check_found(int64_t old_time) "%" PRId64
-colo_compare_miscompare(void) ""
-
-# net/filter-rewriter.c
-colo_filter_rewriter_debug(void) ""
-colo_filter_rewriter_pkt_info(const char *func, const char *src, const char *dst, uint32_t seq, uint32_t ack, uint32_t flag) "%s: src/dst: %s/%s p: seq/ack=%u/%u flags=%x\n"
-colo_filter_rewriter_conn_offset(uint32_t offset) ": offset=%u\n"
-
### Guest events, keep at bottom
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 02/20] trace: remove double-underscore in event name
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 01/20] trace: move colo trace events to net/ sub-directory Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 03/20] trace: add trace event iterator APIs Daniel P. Berrange
` (20 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
If there is a double underscore in an event name, at least
systemtap 3.0 will turn that into a single underscore. This
in turn breaks the generated QEMU code that calls this
event. The generated-tracers.h file calls a macro called
QEMU_SPAPR_VSCSI__PROCESS_LOGIN, but the corresponding
generated-tracers-dtrace.h file defines a macro called
QEMU_SPAPR_VSCSI_PROCESS_LOGIN.
It is unclear if this removal of double underscores is
intended behaviour of systemtap or not. So rather than
try to change the tracetool to generate the systemtap
macro with the double underscore squished, it is
simpler to just avoid this usage in the first place.
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
hw/scsi/spapr_vscsi.c | 2 +-
hw/scsi/trace-events | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/scsi/spapr_vscsi.c b/hw/scsi/spapr_vscsi.c
index d8a2296..6090a20 100644
--- a/hw/scsi/spapr_vscsi.c
+++ b/hw/scsi/spapr_vscsi.c
@@ -658,7 +658,7 @@ static void vscsi_process_login(VSCSIState *s, vscsi_req *req)
struct srp_login_rsp *rsp = &iu->srp.login_rsp;
uint64_t tag = iu->srp.rsp.tag;
- trace_spapr_vscsi__process_login();
+ trace_spapr_vscsi_process_login();
/* TODO handle case that requested size is wrong and
* buffer format is wrong
diff --git a/hw/scsi/trace-events b/hw/scsi/trace-events
index d1995b8..4a2e5d6 100644
--- a/hw/scsi/trace-events
+++ b/hw/scsi/trace-events
@@ -225,7 +225,7 @@ spapr_vscsi_command_complete_sense_data2(unsigned s8, unsigned s9, unsigned s10,
spapr_vscsi_command_complete_status(uint32_t status) "Command complete err=%"PRIu32
spapr_vscsi_save_request(uint32_t qtag, unsigned desc, unsigned offset) "saving tag=%"PRIu32", current desc#%u, offset=0x%x"
spapr_vscsi_load_request(uint32_t qtag, unsigned desc, unsigned offset) "restoring tag=%"PRIu32", current desc#%u, offset=0x%x"
-spapr_vscsi__process_login(void) "Got login, sending response !"
+spapr_vscsi_process_login(void) "Got login, sending response !"
spapr_vscsi_queue_cmd_no_drive(uint64_t lun) "Command for lun %08" PRIx64 " with no drive"
spapr_vscsi_queue_cmd(uint32_t qtag, unsigned cdb, const char *cmd, int lun, int ret) "Queued command tag 0x%"PRIx32" CMD 0x%x=%s LUN %d ret: %d"
spapr_vscsi_do_crq(unsigned c0, unsigned c1) "crq: %02x %02x ..."
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 03/20] trace: add trace event iterator APIs
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 01/20] trace: move colo trace events to net/ sub-directory Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 02/20] trace: remove double-underscore in event name Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 04/20] trace: convert code to use event iterators Daniel P. Berrange
` (19 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
Currently methods which want to iterate over trace events,
do so using the trace_event_count() and trace_event_id()
methods. This leaks the concept of a single ID enum to
the callers. There is an alternative trace_event_pattern()
method which can be used in an iteration context, but its
design is stateless, so is not easy to expand it in the
future.
This defines a formal iterator API will provide a future-
proof way of iterating over events.
The iterator is also able to apply a pattern match filter
to events, further removing the need for the pattern
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
trace/control.c | 21 +++++++++++++++++++++
trace/control.h | 27 +++++++++++++++++++++++++++
2 files changed, 48 insertions(+)
diff --git a/trace/control.c b/trace/control.c
index 10b3e9b..5a9bb5a 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -125,6 +125,27 @@ TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev)
return NULL;
}
+void trace_event_iter_init(TraceEventIter *iter, const char *pattern)
+{
+ iter->event = 0;
+ iter->pattern = pattern;
+}
+
+TraceEvent *trace_event_iter_next(TraceEventIter *iter)
+{
+ while (iter->event < TRACE_EVENT_COUNT) {
+ TraceEvent *ev = &(trace_events[iter->event]);
+ iter->event++;
+ if (!iter->pattern ||
+ pattern_glob(iter->pattern,
+ trace_event_get_name(ev))) {
+ return ev;
+ }
+ }
+
+ return NULL;
+}
+
void trace_list_events(void)
{
int i;
diff --git a/trace/control.h b/trace/control.h
index a22d112..36d7cd2 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -13,6 +13,10 @@
#include "qemu-common.h"
#include "trace/generated-events.h"
+typedef struct TraceEventIter {
+ size_t event;
+ const char *pattern;
+} TraceEventIter;
/**
* TraceEventID:
@@ -25,6 +29,29 @@
*/
enum TraceEventID;
+
+/**
+ * trace_event_iter_init:
+ * @iter: the event iterator struct
+ * @pattern: optional pattern to filter events on name
+ *
+ * Initialize the event iterator struct @iter,
+ * optionally using @pattern to filter out events
+ * with non-matching names.
+ */
+void trace_event_iter_init(TraceEventIter *iter, const char *pattern);
+
+/**
+ * trace_event_iter_next:
+ * @iter: the event iterator struct
+ *
+ * Get the next event, if any. When this returns NULL,
+ * the iterator should no longer be used.
+ *
+ * Returns: the next event, or NULL if no more events exist
+ */
+TraceEvent *trace_event_iter_next(TraceEventIter *iter);
+
/**
* trace_event_id:
* @id: Event identifier.
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 04/20] trace: convert code to use event iterators
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (2 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 03/20] trace: add trace event iterator APIs Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-05 9:48 ` Lluís Vilanova
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 05/20] trace: remove some now unused functions Daniel P. Berrange
` (18 subsequent siblings)
22 siblings, 1 reply; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
This converts the HMP/QMP monitor API implementations
and some internal trace control methods to use the new
trace event iterator APIs.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
monitor.c | 26 +++++++++--------
trace/control-target.c | 8 +++---
trace/control.c | 77 +++++++++++++++++++++++++++-----------------------
trace/qmp.c | 16 +++++++----
4 files changed, 69 insertions(+), 58 deletions(-)
diff --git a/monitor.c b/monitor.c
index 83c4edf..e3daffe 100644
--- a/monitor.c
+++ b/monitor.c
@@ -3327,13 +3327,14 @@ void info_trace_events_completion(ReadLineState *rs, int nb_args, const char *st
len = strlen(str);
readline_set_completion_index(rs, len);
if (nb_args == 2) {
- TraceEventID id;
- for (id = 0; id < trace_event_count(); id++) {
- const char *event_name = trace_event_get_name(trace_event_id(id));
- if (!strncmp(str, event_name, len)) {
- readline_add_completion(rs, event_name);
- }
+ TraceEventIter iter;
+ TraceEvent *ev;
+ char *pattern = g_strdup_printf("%s*", str);
+ trace_event_iter_init(&iter, pattern);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
+ readline_add_completion(rs, trace_event_get_name(ev));
}
+ g_free(pattern);
}
}
@@ -3344,13 +3345,14 @@ void trace_event_completion(ReadLineState *rs, int nb_args, const char *str)
len = strlen(str);
readline_set_completion_index(rs, len);
if (nb_args == 2) {
- TraceEventID id;
- for (id = 0; id < trace_event_count(); id++) {
- const char *event_name = trace_event_get_name(trace_event_id(id));
- if (!strncmp(str, event_name, len)) {
- readline_add_completion(rs, event_name);
- }
+ TraceEventIter iter;
+ TraceEvent *ev;
+ char *pattern = g_strdup_printf("%s*", str);
+ trace_event_iter_init(&iter, pattern);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
+ readline_add_completion(rs, trace_event_get_name(ev));
}
+ g_free(pattern);
} else if (nb_args == 3) {
add_completion_option(rs, str, "on");
add_completion_option(rs, str, "off");
diff --git a/trace/control-target.c b/trace/control-target.c
index 52fcce5..50bac4f 100644
--- a/trace/control-target.c
+++ b/trace/control-target.c
@@ -98,9 +98,10 @@ static bool adding_first_cpu(void)
void trace_init_vcpu(CPUState *vcpu)
{
- TraceEvent *ev = NULL;
-
- while ((ev = trace_event_pattern("*", ev)) != NULL) {
+ TraceEventIter iter;
+ TraceEvent *ev;
+ trace_event_iter_init(&iter, NULL);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (trace_event_is_vcpu(ev) &&
trace_event_get_state_static(ev) &&
trace_event_get_state_dynamic(ev)) {
@@ -118,6 +119,5 @@ void trace_init_vcpu(CPUState *vcpu)
}
}
}
-
trace_guest_cpu_enter(vcpu);
}
diff --git a/trace/control.c b/trace/control.c
index 5a9bb5a..a107cc3 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -60,9 +60,10 @@ TraceEvent *trace_event_name(const char *name)
{
assert(name != NULL);
- TraceEventID i;
- for (i = 0; i < trace_event_count(); i++) {
- TraceEvent *ev = trace_event_id(i);
+ TraceEventIter iter;
+ TraceEvent *ev;
+ trace_event_iter_init(&iter, NULL);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (strcmp(trace_event_get_name(ev), name) == 0) {
return ev;
}
@@ -105,21 +106,18 @@ TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev)
{
assert(pat != NULL);
- TraceEventID i;
-
- if (ev == NULL) {
- i = -1;
- } else {
- i = trace_event_get_id(ev);
- }
- i++;
-
- while (i < trace_event_count()) {
- TraceEvent *res = trace_event_id(i);
- if (pattern_glob(pat, trace_event_get_name(res))) {
- return res;
+ bool matched = ev ? false : true;
+ TraceEventIter iter;
+ TraceEvent *thisev;
+ trace_event_iter_init(&iter, pat);
+ while ((thisev = trace_event_iter_next(&iter)) != NULL) {
+ if (matched) {
+ return thisev;
+ } else {
+ if (ev == thisev) {
+ matched = true;
+ }
}
- i++;
}
return NULL;
@@ -148,10 +146,11 @@ TraceEvent *trace_event_iter_next(TraceEventIter *iter)
void trace_list_events(void)
{
- int i;
- for (i = 0; i < trace_event_count(); i++) {
- TraceEvent *res = trace_event_id(i);
- fprintf(stderr, "%s\n", trace_event_get_name(res));
+ TraceEventIter iter;
+ TraceEvent *ev;
+ trace_event_iter_init(&iter, NULL);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
+ fprintf(stderr, "%s\n", trace_event_get_name(ev));
}
}
@@ -159,26 +158,32 @@ static void do_trace_enable_events(const char *line_buf)
{
const bool enable = ('-' != line_buf[0]);
const char *line_ptr = enable ? line_buf : line_buf + 1;
+ TraceEventIter iter;
+ TraceEvent *ev;
+ bool is_pattern = trace_event_is_pattern(line_ptr);
- if (trace_event_is_pattern(line_ptr)) {
- TraceEvent *ev = NULL;
- while ((ev = trace_event_pattern(line_ptr, ev)) != NULL) {
- if (trace_event_get_state_static(ev)) {
- trace_event_set_state_dynamic_init(ev, enable);
+ trace_event_iter_init(&iter, line_ptr);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
+ if (!trace_event_get_state_static(ev)) {
+ if (!is_pattern) {
+ error_report("WARNING: trace event '%s' is not traceable",
+ line_ptr);
+ return;
}
+ continue;
}
- } else {
- TraceEvent *ev = trace_event_name(line_ptr);
- if (ev == NULL) {
- error_report("WARNING: trace event '%s' does not exist",
- line_ptr);
- } else if (!trace_event_get_state_static(ev)) {
- error_report("WARNING: trace event '%s' is not traceable",
- line_ptr);
- } else {
- trace_event_set_state_dynamic_init(ev, enable);
+
+ /* start tracing */
+ trace_event_set_state_dynamic(ev, enable);
+ if (!is_pattern) {
+ return;
}
}
+
+ if (!is_pattern) {
+ error_report("WARNING: trace event '%s' does not exist",
+ line_ptr);
+ }
}
void trace_enable_events(const char *line_buf)
diff --git a/trace/qmp.c b/trace/qmp.c
index 11d2564..ac777d1 100644
--- a/trace/qmp.c
+++ b/trace/qmp.c
@@ -52,8 +52,10 @@ static bool check_events(bool has_vcpu, bool ignore_unavailable, bool is_pattern
return true;
} else {
/* error for unavailable events */
- TraceEvent *ev = NULL;
- while ((ev = trace_event_pattern(name, ev)) != NULL) {
+ TraceEventIter iter;
+ TraceEvent *ev;
+ trace_event_iter_init(&iter, name);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (!ignore_unavailable && !trace_event_get_state_static(ev)) {
error_setg(errp, "event \"%s\" is disabled", trace_event_get_name(ev));
return false;
@@ -69,6 +71,7 @@ TraceEventInfoList *qmp_trace_event_get_state(const char *name,
{
Error *err = NULL;
TraceEventInfoList *events = NULL;
+ TraceEventIter iter;
TraceEvent *ev;
bool is_pattern = trace_event_is_pattern(name);
CPUState *cpu;
@@ -86,8 +89,8 @@ TraceEventInfoList *qmp_trace_event_get_state(const char *name,
}
/* Get states (all errors checked above) */
- ev = NULL;
- while ((ev = trace_event_pattern(name, ev)) != NULL) {
+ trace_event_iter_init(&iter, name);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
TraceEventInfoList *elem;
bool is_vcpu = trace_event_is_vcpu(ev);
if (has_vcpu && !is_vcpu) {
@@ -132,6 +135,7 @@ void qmp_trace_event_set_state(const char *name, bool enable,
Error **errp)
{
Error *err = NULL;
+ TraceEventIter iter;
TraceEvent *ev;
bool is_pattern = trace_event_is_pattern(name);
CPUState *cpu;
@@ -150,8 +154,8 @@ void qmp_trace_event_set_state(const char *name, bool enable,
}
/* Apply changes (all errors checked above) */
- ev = NULL;
- while ((ev = trace_event_pattern(name, ev)) != NULL) {
+ trace_event_iter_init(&iter, name);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (!trace_event_get_state_static(ev) ||
(has_vcpu && !trace_event_is_vcpu(ev))) {
continue;
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 05/20] trace: remove some now unused functions
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (3 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 04/20] trace: convert code to use event iterators Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 06/20] trace: remove global 'uint16 dstate[]' array Daniel P. Berrange
` (17 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
The trace_event_count, trace_event_id and
trace_event_pattern methods are no longer required
now that everything is using the iterator APIs
The trace_event_set_state and trace_event_set_vcpu_state
macros were also unused.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
trace/control-internal.h | 11 ---------
trace/control.c | 20 ----------------
trace/control.h | 59 ------------------------------------------------
3 files changed, 90 deletions(-)
diff --git a/trace/control-internal.h b/trace/control-internal.h
index a4e5f4a..7f31e39 100644
--- a/trace/control-internal.h
+++ b/trace/control-internal.h
@@ -20,17 +20,6 @@ extern uint16_t trace_events_dstate[];
extern int trace_events_enabled_count;
-static inline TraceEventID trace_event_count(void)
-{
- return TRACE_EVENT_COUNT;
-}
-
-static inline TraceEvent *trace_event_id(TraceEventID id)
-{
- assert(id < trace_event_count());
- return &trace_events[id];
-}
-
static inline bool trace_event_is_pattern(const char *str)
{
assert(str != NULL);
diff --git a/trace/control.c b/trace/control.c
index a107cc3..a423f32 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -102,26 +102,6 @@ static bool pattern_glob(const char *pat, const char *ev)
}
}
-TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev)
-{
- assert(pat != NULL);
-
- bool matched = ev ? false : true;
- TraceEventIter iter;
- TraceEvent *thisev;
- trace_event_iter_init(&iter, pat);
- while ((thisev = trace_event_iter_next(&iter)) != NULL) {
- if (matched) {
- return thisev;
- } else {
- if (ev == thisev) {
- matched = true;
- }
- }
- }
-
- return NULL;
-}
void trace_event_iter_init(TraceEventIter *iter, const char *pattern)
{
diff --git a/trace/control.h b/trace/control.h
index 36d7cd2..10d4aba 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -52,21 +52,6 @@ void trace_event_iter_init(TraceEventIter *iter, const char *pattern);
*/
TraceEvent *trace_event_iter_next(TraceEventIter *iter);
-/**
- * trace_event_id:
- * @id: Event identifier.
- *
- * Get an event by its identifier.
- *
- * This routine has a constant cost, as opposed to trace_event_name and
- * trace_event_pattern.
- *
- * Pre-conditions: The identifier is valid.
- *
- * Returns: pointer to #TraceEvent.
- *
- */
-static TraceEvent *trace_event_id(TraceEventID id);
/**
* trace_event_name:
@@ -79,31 +64,12 @@ static TraceEvent *trace_event_id(TraceEventID id);
TraceEvent *trace_event_name(const char *name);
/**
- * trace_event_pattern:
- * @pat: Event name pattern.
- * @ev: Event to start searching from (not included).
- *
- * Get all events with a given name pattern.
- *
- * Returns: pointer to #TraceEvent or NULL if not found.
- */
-TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev);
-
-/**
* trace_event_is_pattern:
*
* Whether the given string is an event name pattern.
*/
static bool trace_event_is_pattern(const char *str);
-/**
- * trace_event_count:
- *
- * Return the number of events.
- */
-static TraceEventID trace_event_count(void);
-
-
/**
* trace_event_get_id:
@@ -194,31 +160,6 @@ static bool trace_event_get_state_dynamic(TraceEvent *ev);
*/
static bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu, TraceEvent *ev);
-/**
- * trace_event_set_state:
- *
- * Set the tracing state of an event (only if possible).
- */
-#define trace_event_set_state(id, state) \
- do { \
- if ((id ##_ENABLED)) { \
- TraceEvent *_e = trace_event_id(id); \
- trace_event_set_state_dynamic(_e, state); \
- } \
- } while (0)
-
-/**
- * trace_event_set_vcpu_state:
- *
- * Set the tracing state of an event for the given vCPU (only if not disabled).
- */
-#define trace_event_set_vcpu_state(vcpu, id, state) \
- do { \
- if ((id ##_ENABLED)) { \
- TraceEvent *_e = trace_event_id(id); \
- trace_event_set_vcpu_state_dynamic(vcpu, _e, state); \
- } \
- } while (0)
/**
* trace_event_set_state_dynamic:
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 06/20] trace: remove global 'uint16 dstate[]' array
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (4 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 05/20] trace: remove some now unused functions Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 07/20] trace: remove duplicate control.h includes in generated-tracers.h Daniel P. Berrange
` (16 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
Instead of having a global dstate array, declare a single
'uint16 TRACE_${EVENT_NAME}_DSTATE' variable for each
trace event. Record a pointer to this variable in the
TraceEvent struct too.
By turning trace_event_get_state_dynamic_by_id into a
macro, this still hits the fast path, and cache affinity
is ensured by declaring all the uint16 vars adjacent to
each other.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
scripts/tracetool/__init__.py | 3 ++-
scripts/tracetool/format/events_c.py | 9 +++++++--
scripts/tracetool/format/events_h.py | 3 +++
stubs/trace-control.c | 9 ++++-----
trace/control-internal.h | 14 ++++----------
trace/control-target.c | 25 ++++++++++---------------
trace/control.c | 6 ------
trace/event-internal.h | 7 +++++++
8 files changed, 37 insertions(+), 39 deletions(-)
diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py
index be24039..a11f36b 100644
--- a/scripts/tracetool/__init__.py
+++ b/scripts/tracetool/__init__.py
@@ -265,11 +265,12 @@ class Event(object):
QEMU_TRACE = "trace_%(name)s"
QEMU_TRACE_TCG = QEMU_TRACE + "_tcg"
+ QEMU_DSTATE = "_TRACE_%(NAME)s_DSTATE"
def api(self, fmt=None):
if fmt is None:
fmt = Event.QEMU_TRACE
- return fmt % {"name": self.name}
+ return fmt % {"name": self.name, "NAME": self.name.upper()}
def transform(self, *trans):
"""Return a new Event with transformed Arguments."""
diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py
index 4012063..ef873fa 100644
--- a/scripts/tracetool/format/events_c.py
+++ b/scripts/tracetool/format/events_c.py
@@ -25,6 +25,9 @@ def generate(events, backend):
'#include "trace/control.h"',
'')
+ for e in events:
+ out('uint16_t %s;' % e.api(e.QEMU_DSTATE))
+
out('TraceEvent trace_events[TRACE_EVENT_COUNT] = {')
for e in events:
@@ -34,11 +37,13 @@ def generate(events, backend):
vcpu_id = "TRACE_VCPU_EVENT_COUNT"
out(' { .id = %(id)s, .vcpu_id = %(vcpu_id)s,'
' .name = \"%(name)s\",'
- ' .sstate = %(sstate)s },',
+ ' .sstate = %(sstate)s,',
+ ' .dstate = &%(dstate)s, }, ',
id = "TRACE_" + e.name.upper(),
vcpu_id = vcpu_id,
name = e.name,
- sstate = "TRACE_%s_ENABLED" % e.name.upper())
+ sstate = "TRACE_%s_ENABLED" % e.name.upper(),
+ dstate = e.api(e.QEMU_DSTATE))
out('};',
'')
diff --git a/scripts/tracetool/format/events_h.py b/scripts/tracetool/format/events_h.py
index a9da60b..03417de 100644
--- a/scripts/tracetool/format/events_h.py
+++ b/scripts/tracetool/format/events_h.py
@@ -32,6 +32,9 @@ def generate(events, backend):
out(' TRACE_EVENT_COUNT',
'} TraceEventID;')
+ for e in events:
+ out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
+
# per-vCPU event identifiers
out('typedef enum {')
diff --git a/stubs/trace-control.c b/stubs/trace-control.c
index f765a02..7f856e5 100644
--- a/stubs/trace-control.c
+++ b/stubs/trace-control.c
@@ -18,22 +18,21 @@ void trace_event_set_state_dynamic_init(TraceEvent *ev, bool state)
void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
{
- TraceEventID id;
bool state_pre;
assert(trace_event_get_state_static(ev));
- id = trace_event_get_id(ev);
+
/*
* We ignore the "vcpu" property here, since there's no target code. Then
* dstate can only be 1 or 0.
*/
- state_pre = trace_events_dstate[id];
+ state_pre = *(ev->dstate);
if (state_pre != state) {
if (state) {
trace_events_enabled_count++;
- trace_events_dstate[id] = 1;
+ *(ev->dstate) = 1;
} else {
trace_events_enabled_count--;
- trace_events_dstate[id] = 0;
+ *(ev->dstate) = 0;
}
}
}
diff --git a/trace/control-internal.h b/trace/control-internal.h
index 7f31e39..a6d8d2e 100644
--- a/trace/control-internal.h
+++ b/trace/control-internal.h
@@ -16,7 +16,6 @@
extern TraceEvent trace_events[];
-extern uint16_t trace_events_dstate[];
extern int trace_events_enabled_count;
@@ -54,18 +53,13 @@ static inline bool trace_event_get_state_static(TraceEvent *ev)
return ev->sstate;
}
-static inline bool trace_event_get_state_dynamic_by_id(TraceEventID id)
-{
- /* it's on fast path, avoid consistency checks (asserts) */
- return unlikely(trace_events_enabled_count) && trace_events_dstate[id];
-}
+/* it's on fast path, avoid consistency checks (asserts) */
+#define trace_event_get_state_dynamic_by_id(id) \
+ (unlikely(trace_events_enabled_count) && _ ## id ## _DSTATE)
static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
{
- TraceEventID id;
- assert(trace_event_get_state_static(ev));
- id = trace_event_get_id(ev);
- return trace_event_get_state_dynamic_by_id(id);
+ return unlikely(trace_events_enabled_count) && *ev->dstate;
}
static inline bool trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
diff --git a/trace/control-target.c b/trace/control-target.c
index 50bac4f..3b55941 100644
--- a/trace/control-target.c
+++ b/trace/control-target.c
@@ -16,21 +16,20 @@
void trace_event_set_state_dynamic_init(TraceEvent *ev, bool state)
{
- TraceEventID id = trace_event_get_id(ev);
bool state_pre;
assert(trace_event_get_state_static(ev));
/*
* We ignore the "vcpu" property here, since no vCPUs have been created
* yet. Then dstate can only be 1 or 0.
*/
- state_pre = trace_events_dstate[id];
+ state_pre = *ev->dstate;
if (state_pre != state) {
if (state) {
trace_events_enabled_count++;
- trace_events_dstate[id] = 1;
+ *ev->dstate = 1;
} else {
trace_events_enabled_count--;
- trace_events_dstate[id] = 0;
+ *ev->dstate = 0;
}
}
}
@@ -45,15 +44,14 @@ void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
}
} else {
/* Without the "vcpu" property, dstate can only be 1 or 0 */
- TraceEventID id = trace_event_get_id(ev);
- bool state_pre = trace_events_dstate[id];
+ bool state_pre = *ev->dstate;
if (state_pre != state) {
if (state) {
trace_events_enabled_count++;
- trace_events_dstate[id] = 1;
+ *ev->dstate = 1;
} else {
trace_events_enabled_count--;
- trace_events_dstate[id] = 0;
+ *ev->dstate = 0;
}
}
}
@@ -62,23 +60,21 @@ void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
void trace_event_set_vcpu_state_dynamic(CPUState *vcpu,
TraceEvent *ev, bool state)
{
- TraceEventID id;
TraceEventVCPUID vcpu_id;
bool state_pre;
assert(trace_event_get_state_static(ev));
assert(trace_event_is_vcpu(ev));
- id = trace_event_get_id(ev);
vcpu_id = trace_event_get_vcpu_id(ev);
state_pre = test_bit(vcpu_id, vcpu->trace_dstate);
if (state_pre != state) {
if (state) {
trace_events_enabled_count++;
set_bit(vcpu_id, vcpu->trace_dstate);
- trace_events_dstate[id]++;
+ (*ev->dstate)++;
} else {
trace_events_enabled_count--;
clear_bit(vcpu_id, vcpu->trace_dstate);
- trace_events_dstate[id]--;
+ (*ev->dstate)--;
}
}
}
@@ -105,12 +101,11 @@ void trace_init_vcpu(CPUState *vcpu)
if (trace_event_is_vcpu(ev) &&
trace_event_get_state_static(ev) &&
trace_event_get_state_dynamic(ev)) {
- TraceEventID id = trace_event_get_id(ev);
if (adding_first_cpu()) {
/* check preconditions */
- assert(trace_events_dstate[id] == 1);
+ assert(*ev->dstate == 1);
/* disable early-init state ... */
- trace_events_dstate[id] = 0;
+ *ev->dstate = 0;
trace_events_enabled_count--;
/* ... and properly re-enable */
trace_event_set_vcpu_state_dynamic(vcpu, ev, true);
diff --git a/trace/control.c b/trace/control.c
index a423f32..e57f2d3 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -28,12 +28,6 @@
#include "monitor/monitor.h"
int trace_events_enabled_count;
-/*
- * Interpretation depends on wether the event has the 'vcpu' property:
- * - false: Boolean value indicating whether the event is active.
- * - true : Integral counting the number of vCPUs that have this event enabled.
- */
-uint16_t trace_events_dstate[TRACE_EVENT_COUNT];
QemuOptsList qemu_trace_opts = {
.name = "trace",
diff --git a/trace/event-internal.h b/trace/event-internal.h
index 074faf6..4a98d09 100644
--- a/trace/event-internal.h
+++ b/trace/event-internal.h
@@ -19,6 +19,12 @@
* @vcpu_id: Unique per-vCPU event identifier.
* @name: Event name.
* @sstate: Static tracing state.
+ * @dstate: Dynamic tracing state
+ *
+ * Interpretation of @dstate depends on whether the event has the 'vcpu'
+ * property:
+ * - false: Boolean value indicating whether the event is active.
+ * - true : Integral counting the number of vCPUs that have this event enabled.
*
* Opaque generic description of a tracing event.
*/
@@ -27,6 +33,7 @@ typedef struct TraceEvent {
TraceEventVCPUID vcpu_id;
const char * name;
const bool sstate;
+ uint16_t *dstate;
} TraceEvent;
void trace_event_set_state_dynamic_init(TraceEvent *ev, bool state);
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 07/20] trace: remove duplicate control.h includes in generated-tracers.h
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (5 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 06/20] trace: remove global 'uint16 dstate[]' array Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 08/20] trace: break circular dependency in event-internal.h Daniel P. Berrange
` (15 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
The format/h.py file adds an include for control.h to
generated-tracers.h. ftrace, log and syslog, then
add more duplicate includes for control.h.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
scripts/tracetool/backend/ftrace.py | 1 -
scripts/tracetool/backend/log.py | 3 +--
scripts/tracetool/backend/syslog.py | 1 -
3 files changed, 1 insertion(+), 4 deletions(-)
diff --git a/scripts/tracetool/backend/ftrace.py b/scripts/tracetool/backend/ftrace.py
index 80dcf30..4b83b44 100644
--- a/scripts/tracetool/backend/ftrace.py
+++ b/scripts/tracetool/backend/ftrace.py
@@ -21,7 +21,6 @@ PUBLIC = True
def generate_h_begin(events):
out('#include "trace/ftrace.h"',
- '#include "trace/control.h"',
'')
diff --git a/scripts/tracetool/backend/log.py b/scripts/tracetool/backend/log.py
index b3ff064..426bb6e 100644
--- a/scripts/tracetool/backend/log.py
+++ b/scripts/tracetool/backend/log.py
@@ -20,8 +20,7 @@ PUBLIC = True
def generate_h_begin(events):
- out('#include "trace/control.h"',
- '#include "qemu/log.h"',
+ out('#include "qemu/log.h"',
'')
diff --git a/scripts/tracetool/backend/syslog.py b/scripts/tracetool/backend/syslog.py
index 89019bc..5f693bd 100644
--- a/scripts/tracetool/backend/syslog.py
+++ b/scripts/tracetool/backend/syslog.py
@@ -21,7 +21,6 @@ PUBLIC = True
def generate_h_begin(events):
out('#include <syslog.h>',
- '#include "trace/control.h"',
'')
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 08/20] trace: break circular dependency in event-internal.h
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (6 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 07/20] trace: remove duplicate control.h includes in generated-tracers.h Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 09/20] trace: give each trace event a named TraceEvent struct Daniel P. Berrange
` (14 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
Currently event-internal.h includes generated-events.h,
while generated-events.h includes event-internal.h
causing a circular dependency.
event-internal.h requires that the content of
generated-events.h comes first, so that it can see
the typedefs for TraceEventID and TraceEventVCPUID.
Switching the TraceEvent struct to use uint32_t
for the two ID fields removes the dependency on
the typedef, allowing events-internal.h to be a
self-contained header. This will then let the patch
following this move event-internal.h to the top of
generated-events.h, so we can expose TraceEvent
struct variables in generated-events.h
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
trace/event-internal.h | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/trace/event-internal.h b/trace/event-internal.h
index 4a98d09..58f0551 100644
--- a/trace/event-internal.h
+++ b/trace/event-internal.h
@@ -10,9 +10,6 @@
#ifndef TRACE__EVENT_INTERNAL_H
#define TRACE__EVENT_INTERNAL_H
-#include "trace/generated-events.h"
-
-
/**
* TraceEvent:
* @id: Unique event identifier.
@@ -29,8 +26,8 @@
* Opaque generic description of a tracing event.
*/
typedef struct TraceEvent {
- TraceEventID id;
- TraceEventVCPUID vcpu_id;
+ uint32_t id;
+ uint32_t vcpu_id;
const char * name;
const bool sstate;
uint16_t *dstate;
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 09/20] trace: give each trace event a named TraceEvent struct
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (7 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 08/20] trace: break circular dependency in event-internal.h Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 10/20] trace: remove the TraceEventID and TraceEventVCPUID enums Daniel P. Berrange
` (13 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
Currently we only expose a TraceEvent array, which must
be indexed via the TraceEventID enum constants. This
changes the generator to expose a named TraceEvent
instance for each event, with an _EVENT suffix.
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
scripts/tracetool/__init__.py | 1 +
scripts/tracetool/format/events_c.py | 19 +++++++++++++------
scripts/tracetool/format/events_h.py | 11 ++++++++---
trace/control-internal.h | 2 +-
trace/control.c | 2 +-
5 files changed, 24 insertions(+), 11 deletions(-)
diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py
index a11f36b..dc93416 100644
--- a/scripts/tracetool/__init__.py
+++ b/scripts/tracetool/__init__.py
@@ -266,6 +266,7 @@ class Event(object):
QEMU_TRACE = "trace_%(name)s"
QEMU_TRACE_TCG = QEMU_TRACE + "_tcg"
QEMU_DSTATE = "_TRACE_%(NAME)s_DSTATE"
+ QEMU_EVENT = "_TRACE_%(NAME)s_EVENT"
def api(self, fmt=None):
if fmt is None:
diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py
index ef873fa..a97054f 100644
--- a/scripts/tracetool/format/events_c.py
+++ b/scripts/tracetool/format/events_c.py
@@ -28,22 +28,29 @@ def generate(events, backend):
for e in events:
out('uint16_t %s;' % e.api(e.QEMU_DSTATE))
- out('TraceEvent trace_events[TRACE_EVENT_COUNT] = {')
-
for e in events:
if "vcpu" in e.properties:
vcpu_id = "TRACE_VCPU_" + e.name.upper()
else:
vcpu_id = "TRACE_VCPU_EVENT_COUNT"
- out(' { .id = %(id)s, .vcpu_id = %(vcpu_id)s,'
- ' .name = \"%(name)s\",'
- ' .sstate = %(sstate)s,',
- ' .dstate = &%(dstate)s, }, ',
+ out('TraceEvent %(event)s = {',
+ ' .id = %(id)s,',
+ ' .vcpu_id = %(vcpu_id)s,',
+ ' .name = \"%(name)s\",',
+ ' .sstate = %(sstate)s,',
+ ' .dstate = &%(dstate)s ',
+ '};',
+ event = e.api(e.QEMU_EVENT),
id = "TRACE_" + e.name.upper(),
vcpu_id = vcpu_id,
name = e.name,
sstate = "TRACE_%s_ENABLED" % e.name.upper(),
dstate = e.api(e.QEMU_DSTATE))
+ out('TraceEvent *trace_events[TRACE_EVENT_COUNT] = {')
+
+ for e in events:
+ out(' &%(event)s,', event = e.api(e.QEMU_EVENT))
+
out('};',
'')
diff --git a/scripts/tracetool/format/events_h.py b/scripts/tracetool/format/events_h.py
index 03417de..80a66c5 100644
--- a/scripts/tracetool/format/events_h.py
+++ b/scripts/tracetool/format/events_h.py
@@ -21,7 +21,13 @@ def generate(events, backend):
'',
'#ifndef TRACE__GENERATED_EVENTS_H',
'#define TRACE__GENERATED_EVENTS_H',
- '')
+ '',
+ '#include "trace/event-internal.h"',
+ )
+
+ for e in events:
+ out('extern TraceEvent %(event)s;',
+ event = e.api(e.QEMU_EVENT))
# event identifiers
out('typedef enum {')
@@ -58,6 +64,5 @@ def generate(events, backend):
enabled=enabled)
out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
- out('#include "trace/event-internal.h"',
- '',
+ out('',
'#endif /* TRACE__GENERATED_EVENTS_H */')
diff --git a/trace/control-internal.h b/trace/control-internal.h
index a6d8d2e..808f85d 100644
--- a/trace/control-internal.h
+++ b/trace/control-internal.h
@@ -15,7 +15,7 @@
#include "qom/cpu.h"
-extern TraceEvent trace_events[];
+extern TraceEvent *trace_events[];
extern int trace_events_enabled_count;
diff --git a/trace/control.c b/trace/control.c
index e57f2d3..9035846 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -106,7 +106,7 @@ void trace_event_iter_init(TraceEventIter *iter, const char *pattern)
TraceEvent *trace_event_iter_next(TraceEventIter *iter)
{
while (iter->event < TRACE_EVENT_COUNT) {
- TraceEvent *ev = &(trace_events[iter->event]);
+ TraceEvent *ev = trace_events[iter->event];
iter->event++;
if (!iter->pattern ||
pattern_glob(iter->pattern,
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 10/20] trace: remove the TraceEventID and TraceEventVCPUID enums
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (8 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 09/20] trace: give each trace event a named TraceEvent struct Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 11/20] trace: emit name <-> ID mapping in simpletrace header Daniel P. Berrange
` (12 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
The TraceEventID and TraceEventVCPUID enums constants are
no longer actually used for anything critical.
The TRACE_EVENT_COUNT limit is used to determine the size
of the TraceEvents array, and can be removed if we just
NULL terminate the array instead.
The TRACE_VCPU_EVENT_COUNT limit is used as a magic value
for marking non-vCPU events, and also for declaring the
size of the trace dstate mask in the CPUState struct.
The former usage can be replaced by a dedicated constant
TRACE_EVENT_VCPU_NONE, defined as (uint32_t)-1. For the
latter usage, we can simply define a constant for the
number of VCPUs, avoiding the need for the full enum.
The only other usages of the enum values can be replaced
by accesing the id/vcpu_id fields via the named TraceEvent
structs.
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
scripts/tracetool/backend/simple.py | 4 ++--
scripts/tracetool/format/events_c.py | 16 +++++++++++-----
scripts/tracetool/format/events_h.py | 19 ++-----------------
scripts/tracetool/format/h.py | 3 +--
trace/control-internal.h | 19 ++++++++++---------
trace/control-target.c | 2 +-
trace/control.c | 2 +-
trace/control.h | 32 +++++++++-----------------------
trace/event-internal.h | 6 ++++++
trace/simple.c | 8 ++++----
trace/simple.h | 2 +-
11 files changed, 48 insertions(+), 65 deletions(-)
diff --git a/scripts/tracetool/backend/simple.py b/scripts/tracetool/backend/simple.py
index 1bccada..1114e35 100644
--- a/scripts/tracetool/backend/simple.py
+++ b/scripts/tracetool/backend/simple.py
@@ -80,11 +80,11 @@ def generate_c(event):
' return;',
' }',
'',
- ' if (trace_record_start(&rec, %(event_id)s, %(size_str)s)) {',
+ ' if (trace_record_start(&rec, %(event_obj)s.id, %(size_str)s)) {',
' return; /* Trace Buffer Full, Event Dropped ! */',
' }',
cond=cond,
- event_id=event_id,
+ event_obj=event.api(event.QEMU_EVENT),
size_str=sizestr)
if len(event.args) > 0:
diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py
index a97054f..40ae395 100644
--- a/scripts/tracetool/format/events_c.py
+++ b/scripts/tracetool/format/events_c.py
@@ -28,11 +28,16 @@ def generate(events, backend):
for e in events:
out('uint16_t %s;' % e.api(e.QEMU_DSTATE))
+ next_id = 0
+ next_vcpu_id = 0
for e in events:
+ id = next_id
+ next_id += 1
if "vcpu" in e.properties:
- vcpu_id = "TRACE_VCPU_" + e.name.upper()
+ vcpu_id = next_vcpu_id
+ next_vcpu_id += 1
else:
- vcpu_id = "TRACE_VCPU_EVENT_COUNT"
+ vcpu_id = "TRACE_VCPU_EVENT_NONE"
out('TraceEvent %(event)s = {',
' .id = %(id)s,',
' .vcpu_id = %(vcpu_id)s,',
@@ -41,16 +46,17 @@ def generate(events, backend):
' .dstate = &%(dstate)s ',
'};',
event = e.api(e.QEMU_EVENT),
- id = "TRACE_" + e.name.upper(),
+ id = id,
vcpu_id = vcpu_id,
name = e.name,
sstate = "TRACE_%s_ENABLED" % e.name.upper(),
dstate = e.api(e.QEMU_DSTATE))
- out('TraceEvent *trace_events[TRACE_EVENT_COUNT] = {')
+ out('TraceEvent *trace_events[] = {')
for e in events:
out(' &%(event)s,', event = e.api(e.QEMU_EVENT))
- out('};',
+ out(' NULL,',
+ '};',
'')
diff --git a/scripts/tracetool/format/events_h.py b/scripts/tracetool/format/events_h.py
index 80a66c5..ca6d730 100644
--- a/scripts/tracetool/format/events_h.py
+++ b/scripts/tracetool/format/events_h.py
@@ -29,27 +29,12 @@ def generate(events, backend):
out('extern TraceEvent %(event)s;',
event = e.api(e.QEMU_EVENT))
- # event identifiers
- out('typedef enum {')
-
- for e in events:
- out(' TRACE_%s,' % e.name.upper())
-
- out(' TRACE_EVENT_COUNT',
- '} TraceEventID;')
-
for e in events:
out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
- # per-vCPU event identifiers
- out('typedef enum {')
-
- for e in events:
- if "vcpu" in e.properties:
- out(' TRACE_VCPU_%s,' % e.name.upper())
+ numvcpu = len([e for e in events if "vcpu" in e.properties])
- out(' TRACE_VCPU_EVENT_COUNT',
- '} TraceEventVCPUID;')
+ out("#define TRACE_VCPU_EVENT_COUNT %d" % numvcpu)
# static state
for e in events:
diff --git a/scripts/tracetool/format/h.py b/scripts/tracetool/format/h.py
index 3763e9a..64a6680 100644
--- a/scripts/tracetool/format/h.py
+++ b/scripts/tracetool/format/h.py
@@ -32,8 +32,7 @@ def generate(events, backend):
if "vcpu" in e.properties:
trace_cpu = next(iter(e.args))[1]
cond = "trace_event_get_vcpu_state(%(cpu)s,"\
- " TRACE_%(id)s,"\
- " TRACE_VCPU_%(id)s)"\
+ " TRACE_%(id)s)"\
% dict(
cpu=trace_cpu,
id=e.name.upper())
diff --git a/trace/control-internal.h b/trace/control-internal.h
index 808f85d..9abbc96 100644
--- a/trace/control-internal.h
+++ b/trace/control-internal.h
@@ -25,20 +25,20 @@ static inline bool trace_event_is_pattern(const char *str)
return strchr(str, '*') != NULL;
}
-static inline TraceEventID trace_event_get_id(TraceEvent *ev)
+static inline uint32_t trace_event_get_id(TraceEvent *ev)
{
assert(ev != NULL);
return ev->id;
}
-static inline TraceEventVCPUID trace_event_get_vcpu_id(TraceEvent *ev)
+static inline uint32_t trace_event_get_vcpu_id(TraceEvent *ev)
{
return ev->vcpu_id;
}
static inline bool trace_event_is_vcpu(TraceEvent *ev)
{
- return ev->vcpu_id != TRACE_VCPU_EVENT_COUNT;
+ return ev->vcpu_id != TRACE_VCPU_EVENT_NONE;
}
static inline const char * trace_event_get_name(TraceEvent *ev)
@@ -62,12 +62,13 @@ static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
return unlikely(trace_events_enabled_count) && *ev->dstate;
}
-static inline bool trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
- TraceEventVCPUID id)
+static inline bool
+trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
+ uint32_t vcpu_id)
{
/* it's on fast path, avoid consistency checks (asserts) */
if (unlikely(trace_events_enabled_count)) {
- return test_bit(id, vcpu->trace_dstate);
+ return test_bit(vcpu_id, vcpu->trace_dstate);
} else {
return false;
}
@@ -76,10 +77,10 @@ static inline bool trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu,
TraceEvent *ev)
{
- TraceEventVCPUID id;
+ uint32_t vcpu_id;
assert(trace_event_is_vcpu(ev));
- id = trace_event_get_vcpu_id(ev);
- return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, id);
+ vcpu_id = trace_event_get_vcpu_id(ev);
+ return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, vcpu_id);
}
#endif /* TRACE__CONTROL_INTERNAL_H */
diff --git a/trace/control-target.c b/trace/control-target.c
index 3b55941..7ebf6e0 100644
--- a/trace/control-target.c
+++ b/trace/control-target.c
@@ -60,7 +60,7 @@ void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
void trace_event_set_vcpu_state_dynamic(CPUState *vcpu,
TraceEvent *ev, bool state)
{
- TraceEventVCPUID vcpu_id;
+ uint32_t vcpu_id;
bool state_pre;
assert(trace_event_get_state_static(ev));
assert(trace_event_is_vcpu(ev));
diff --git a/trace/control.c b/trace/control.c
index 9035846..6b32511 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -105,7 +105,7 @@ void trace_event_iter_init(TraceEventIter *iter, const char *pattern)
TraceEvent *trace_event_iter_next(TraceEventIter *iter)
{
- while (iter->event < TRACE_EVENT_COUNT) {
+ while (trace_events[iter->event] != NULL) {
TraceEvent *ev = trace_events[iter->event];
iter->event++;
if (!iter->pattern ||
diff --git a/trace/control.h b/trace/control.h
index 10d4aba..cccd2a2 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -18,17 +18,6 @@ typedef struct TraceEventIter {
const char *pattern;
} TraceEventIter;
-/**
- * TraceEventID:
- *
- * Unique tracing event identifier.
- *
- * These are named as 'TRACE_${EVENT_NAME}'.
- *
- * See also: "trace/generated-events.h"
- */
-enum TraceEventID;
-
/**
* trace_event_iter_init:
@@ -76,17 +65,17 @@ static bool trace_event_is_pattern(const char *str);
*
* Get the identifier of an event.
*/
-static TraceEventID trace_event_get_id(TraceEvent *ev);
+static uint32_t trace_event_get_id(TraceEvent *ev);
/**
* trace_event_get_vcpu_id:
*
* Get the per-vCPU identifier of an event.
*
- * Special value #TRACE_VCPU_EVENT_COUNT means the event is not vCPU-specific
+ * Special value #TRACE_VCPU_EVENT_NONE means the event is not vCPU-specific
* (does not have the "vcpu" property).
*/
-static TraceEventVCPUID trace_event_get_vcpu_id(TraceEvent *ev);
+static uint32_t trace_event_get_vcpu_id(TraceEvent *ev);
/**
* trace_event_is_vcpu:
@@ -104,14 +93,12 @@ static const char * trace_event_get_name(TraceEvent *ev);
/**
* trace_event_get_state:
- * @id: Event identifier.
+ * @id: Event identifier name.
*
* Get the tracing state of an event (both static and dynamic).
*
* If the event has the disabled property, the check will have no performance
* impact.
- *
- * As a down side, you must always use an immediate #TraceEventID value.
*/
#define trace_event_get_state(id) \
((id ##_ENABLED) && trace_event_get_state_dynamic_by_id(id))
@@ -119,19 +106,18 @@ static const char * trace_event_get_name(TraceEvent *ev);
/**
* trace_event_get_vcpu_state:
* @vcpu: Target vCPU.
- * @id: Event identifier (TraceEventID).
- * @vcpu_id: Per-vCPU event identifier (TraceEventVCPUID).
+ * @id: Event identifier name.
*
* Get the tracing state of an event (both static and dynamic) for the given
* vCPU.
*
* If the event has the disabled property, the check will have no performance
* impact.
- *
- * As a down side, you must always use an immediate #TraceEventID value.
*/
-#define trace_event_get_vcpu_state(vcpu, id, vcpu_id) \
- ((id ##_ENABLED) && trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, vcpu_id))
+#define trace_event_get_vcpu_state(vcpu, id) \
+ ((id ##_ENABLED) && \
+ trace_event_get_vcpu_state_dynamic_by_vcpu_id( \
+ vcpu, _ ## id ## _EVENT.vcpu_id))
/**
* trace_event_get_state_static:
diff --git a/trace/event-internal.h b/trace/event-internal.h
index 58f0551..f63500b 100644
--- a/trace/event-internal.h
+++ b/trace/event-internal.h
@@ -10,6 +10,12 @@
#ifndef TRACE__EVENT_INTERNAL_H
#define TRACE__EVENT_INTERNAL_H
+/*
+ * Special value for TraceEvent.vcpu_id field to indicate
+ * that the event is not VCPU specific
+ */
+#define TRACE_VCPU_EVENT_NONE ((uint32_t)-1)
+
/**
* TraceEvent:
* @id: Unique event identifier.
diff --git a/trace/simple.c b/trace/simple.c
index 2f09daf..2ec32e1 100644
--- a/trace/simple.c
+++ b/trace/simple.c
@@ -17,8 +17,8 @@
#include "trace/control.h"
#include "trace/simple.h"
-/** Trace file header event ID */
-#define HEADER_EVENT_ID (~(uint64_t)0) /* avoids conflicting with TraceEventIDs */
+/** Trace file header event ID, picked to avoid conflict with real event IDs */
+#define HEADER_EVENT_ID (~(uint64_t)0)
/** Trace file magic number */
#define HEADER_MAGIC 0xf2b177cb0aa429b4ULL
@@ -58,7 +58,7 @@ static char *trace_file_name;
/* * Trace buffer entry */
typedef struct {
- uint64_t event; /* TraceEventID */
+ uint64_t event; /* event ID value */
uint64_t timestamp_ns;
uint32_t length; /* in bytes */
uint32_t pid;
@@ -202,7 +202,7 @@ void trace_record_write_str(TraceBufferRecord *rec, const char *s, uint32_t slen
rec->rec_off = write_to_buffer(rec->rec_off, (void*)s, slen);
}
-int trace_record_start(TraceBufferRecord *rec, TraceEventID event, size_t datasize)
+int trace_record_start(TraceBufferRecord *rec, uint32_t event, size_t datasize)
{
unsigned int idx, rec_off, old_idx, new_idx;
uint32_t rec_len = sizeof(TraceRecord) + datasize;
diff --git a/trace/simple.h b/trace/simple.h
index 1e7de45..17ce472 100644
--- a/trace/simple.h
+++ b/trace/simple.h
@@ -33,7 +33,7 @@ typedef struct {
*
* @arglen number of bytes required for arguments
*/
-int trace_record_start(TraceBufferRecord *rec, TraceEventID id, size_t arglen);
+int trace_record_start(TraceBufferRecord *rec, uint32_t id, size_t arglen);
/**
* Append a 64-bit argument to a trace record
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 11/20] trace: emit name <-> ID mapping in simpletrace header
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (9 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 10/20] trace: remove the TraceEventID and TraceEventVCPUID enums Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-05 14:09 ` Stefan Hajnoczi
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 12/20] trace: don't abort qemu if ftrace can't be initialized Daniel P. Berrange
` (11 subsequent siblings)
22 siblings, 1 reply; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
Currently simpletrace assumes that events are given IDs
starting from 0, based on the order in which they appear
in the trace-events file, with no gaps. When the
trace-events file is split up, this assumption becomes
problematic.
To deal with this, extend the simpletrace format so that
it outputs a table of event name <-> ID mappings. That
will allow QEMU to assign arbitrary IDs to events without
breaking simpletrace parsing.
The v3 simple trace format was
FILE HEADER
EVENT TRACE RECORD 0
EVENT TRACE RECORD 1
...
EVENT TRACE RECORD N
The v4 simple trace format is now
FILE HEADER
EVENT MAPPING RECORD 0
EVENT MAPPING RECORD 1
...
EVENT MAPPING RECORD M
EVENT TRACE RECORD RECORD 0
EVENT TRACE RECORD RECORD 1
...
EVENT TRACE RECORD N
Although this shows all the mapping records being emitted
upfront, this is not required by the format. While the main
simpletrace backend will emit all mappings at startup,
the systemtap simpletrace.stp script will emit the mappings
at first use. eg
FILE HEADER
...
EVENT MAPPING RECORD 0
EVENT TRACE RECORD RECORD 0
EVENT TRACE RECORD RECORD 1
EVENT MAPPING RECORD 1
EVENT TRACE RECORD RECORD 2
...
EVENT TRACE RECORD N
This is more space efficient given that most trace records
only include a subset of events.
In modifying the systemtap simpletrace code, a 'begin' probe
was added to emit the trace event header, so you no longer
need to add '--no-header' when running simpletrace.py for
systemtap generated trace files.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
scripts/simpletrace.py | 50 ++++++++++++++++++++--------
scripts/tracetool/format/simpletrace_stap.py | 24 +++++++++++--
trace/simple.c | 33 ++++++++++++++++--
3 files changed, 89 insertions(+), 18 deletions(-)
diff --git a/scripts/simpletrace.py b/scripts/simpletrace.py
index 3916c6d..f40467a 100755
--- a/scripts/simpletrace.py
+++ b/scripts/simpletrace.py
@@ -19,6 +19,9 @@ header_event_id = 0xffffffffffffffff
header_magic = 0xf2b177cb0aa429b4
dropped_event_id = 0xfffffffffffffffe
+record_type_mapping = 0
+record_type_event = 1
+
log_header_fmt = '=QQQ'
rec_header_fmt = '=QQII'
@@ -30,14 +33,16 @@ def read_header(fobj, hfmt):
return None
return struct.unpack(hfmt, hdr)
-def get_record(edict, rechdr, fobj):
- """Deserialize a trace record from a file into a tuple (event_num, timestamp, pid, arg1, ..., arg6)."""
+def get_record(edict, idtoname, rechdr, fobj):
+ """Deserialize a trace record from a file into a tuple
+ (name, timestamp, pid, arg1, ..., arg6)."""
if rechdr is None:
return None
- rec = (rechdr[0], rechdr[1], rechdr[3])
if rechdr[0] != dropped_event_id:
event_id = rechdr[0]
- event = edict[event_id]
+ name = idtoname[event_id]
+ rec = (name, rechdr[1], rechdr[3])
+ event = edict[name]
for type, name in event.args:
if is_string(type):
l = fobj.read(4)
@@ -48,15 +53,22 @@ def get_record(edict, rechdr, fobj):
(value,) = struct.unpack('=Q', fobj.read(8))
rec = rec + (value,)
else:
+ rec = ("dropped", rechdr[1], rechdr[3])
(value,) = struct.unpack('=Q', fobj.read(8))
rec = rec + (value,)
return rec
+def get_mapping(fobj):
+ (event_id, ) = struct.unpack('=Q', fobj.read(8))
+ (len, ) = struct.unpack('=L', fobj.read(4))
+ name = fobj.read(len)
+
+ return (event_id, name)
-def read_record(edict, fobj):
+def read_record(edict, idtoname, fobj):
"""Deserialize a trace record from a file into a tuple (event_num, timestamp, pid, arg1, ..., arg6)."""
rechdr = read_header(fobj, rec_header_fmt)
- return get_record(edict, rechdr, fobj) # return tuple of record elements
+ return get_record(edict, idtoname, rechdr, fobj)
def read_trace_header(fobj):
"""Read and verify trace file header"""
@@ -67,20 +79,30 @@ def read_trace_header(fobj):
raise ValueError('Not a valid trace file!')
log_version = header[2]
- if log_version not in [0, 2, 3]:
+ if log_version not in [0, 2, 3, 4]:
raise ValueError('Unknown version of tracelog format!')
- if log_version != 3:
+ if log_version != 4:
raise ValueError('Log format %d not supported with this QEMU release!'
% log_version)
def read_trace_records(edict, fobj):
"""Deserialize trace records from a file, yielding record tuples (event_num, timestamp, pid, arg1, ..., arg6)."""
+ idtoname = {
+ dropped_event_id: "dropped"
+ }
while True:
- rec = read_record(edict, fobj)
- if rec is None:
+ t = fobj.read(8)
+ if len(t) == 0:
break
- yield rec
+ (rectype, ) = struct.unpack('=Q', t)
+ if rectype == record_type_mapping:
+ event_id, name = get_mapping(fobj)
+ idtoname[event_id] = name
+ else:
+ rec = read_record(edict, idtoname, fobj)
+
+ yield rec
class Analyzer(object):
"""A trace file analyzer which processes trace records.
@@ -115,10 +137,10 @@ def process(events, log, analyzer, read_header=True):
read_trace_header(log)
dropped_event = Event.build("Dropped_Event(uint64_t num_events_dropped)")
- edict = {dropped_event_id: dropped_event}
+ edict = {"dropped": dropped_event}
- for num, event in enumerate(events):
- edict[num] = event
+ for event in events:
+ edict[event.name] = event
def build_fn(analyzer, event):
if isinstance(event, str):
diff --git a/scripts/tracetool/format/simpletrace_stap.py b/scripts/tracetool/format/simpletrace_stap.py
index 7e44bc1..ac3580f 100644
--- a/scripts/tracetool/format/simpletrace_stap.py
+++ b/scripts/tracetool/format/simpletrace_stap.py
@@ -21,6 +21,25 @@ from tracetool.format.stap import stap_escape
def generate(events, backend):
out('/* This file is autogenerated by tracetool, do not edit. */',
+ '',
+ 'global event_name_to_id_map',
+ 'global event_next_id',
+ 'function simple_trace_map_event(name)',
+ '',
+ '{',
+ ' if (!([name] in event_name_to_id_map)) {',
+ ' event_name_to_id_map[name] = event_next_id',
+ ' name_len = strlen(name)',
+ ' printf("%%8b%%8b%%4b%%.*s", 0, ',
+ ' event_next_id, name_len, name_len, name)',
+ ' event_next_id = event_next_id + 1',
+ ' }',
+ ' return event_name_to_id_map[name]',
+ '}',
+ 'probe begin',
+ '{',
+ ' printf("%%8b%%8b%%8b", 0xffffffffffffffff, 0xf2b177cb0aa429b4, 4)',
+ '}',
'')
for event_id, e in enumerate(events):
@@ -29,6 +48,7 @@ def generate(events, backend):
out('probe %(probeprefix)s.simpletrace.%(name)s = %(probeprefix)s.%(name)s ?',
'{',
+ ' id = simple_trace_map_event("%(name)s")',
probeprefix=probeprefix(),
name=e.name)
@@ -48,7 +68,7 @@ def generate(events, backend):
sizestr = ' + '.join(sizes)
# Generate format string and value pairs for record header and arguments
- fields = [('8b', str(event_id)),
+ fields = [('8b', 'id'),
('8b', 'gettimeofday_ns()'),
('4b', sizestr),
('4b', 'pid()')]
@@ -63,7 +83,7 @@ def generate(events, backend):
# Emit the entire record in a single SystemTap printf()
fmt_str = '%'.join(fmt for fmt, _ in fields)
arg_str = ', '.join(arg for _, arg in fields)
- out(' printf("%%%(fmt_str)s", %(arg_str)s)',
+ out(' printf("%%8b%%%(fmt_str)s", 1, %(arg_str)s)',
fmt_str=fmt_str, arg_str=arg_str)
out('}')
diff --git a/trace/simple.c b/trace/simple.c
index 2ec32e1..b263622 100644
--- a/trace/simple.c
+++ b/trace/simple.c
@@ -24,7 +24,7 @@
#define HEADER_MAGIC 0xf2b177cb0aa429b4ULL
/** Trace file version number, bump if format changes */
-#define HEADER_VERSION 3
+#define HEADER_VERSION 4
/** Records were dropped event ID */
#define DROPPED_EVENT_ID (~(uint64_t)0 - 1)
@@ -56,6 +56,9 @@ static uint32_t trace_pid;
static FILE *trace_fp;
static char *trace_file_name;
+#define TRACE_RECORD_TYPE_MAPPING 0
+#define TRACE_RECORD_TYPE_EVENT 1
+
/* * Trace buffer entry */
typedef struct {
uint64_t event; /* event ID value */
@@ -160,6 +163,7 @@ static gpointer writeout_thread(gpointer opaque)
unsigned int idx = 0;
int dropped_count;
size_t unused __attribute__ ((unused));
+ uint64_t type = TRACE_RECORD_TYPE_EVENT;
for (;;) {
wait_for_trace_records_available();
@@ -174,10 +178,12 @@ static gpointer writeout_thread(gpointer opaque)
} while (!g_atomic_int_compare_and_exchange(&dropped_events,
dropped_count, 0));
dropped.rec.arguments[0] = dropped_count;
+ unused = fwrite(&type, sizeof(type), 1, trace_fp);
unused = fwrite(&dropped.rec, dropped.rec.length, 1, trace_fp);
}
while (get_trace_record(idx, &recordptr)) {
+ unused = fwrite(&type, sizeof(type), 1, trace_fp);
unused = fwrite(recordptr, recordptr->length, 1, trace_fp);
writeout_idx += recordptr->length;
free(recordptr); /* don't use g_free, can deadlock when traced */
@@ -273,6 +279,28 @@ void trace_record_finish(TraceBufferRecord *rec)
}
}
+static int st_write_event_mapping(void)
+{
+ uint64_t type = TRACE_RECORD_TYPE_MAPPING;
+ TraceEventIter iter;
+ TraceEvent *ev;
+
+ trace_event_iter_init(&iter, NULL);
+ while ((ev = trace_event_iter_next(&iter)) != NULL) {
+ uint64_t id = trace_event_get_id(ev);
+ const char *name = trace_event_get_name(ev);
+ uint32_t len = strlen(name);
+ if (fwrite(&type, sizeof(type), 1, trace_fp) != 1 ||
+ fwrite(&id, sizeof(id), 1, trace_fp) != 1 ||
+ fwrite(&len, sizeof(len), 1, trace_fp) != 1 ||
+ fwrite(name, len, 1, trace_fp) != 1) {
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
void st_set_trace_file_enabled(bool enable)
{
if (enable == !!trace_fp) {
@@ -297,7 +325,8 @@ void st_set_trace_file_enabled(bool enable)
return;
}
- if (fwrite(&header, sizeof header, 1, trace_fp) != 1) {
+ if (fwrite(&header, sizeof header, 1, trace_fp) != 1 ||
+ st_write_event_mapping() < 0) {
fclose(trace_fp);
trace_fp = NULL;
return;
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 12/20] trace: don't abort qemu if ftrace can't be initialized
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (10 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 11/20] trace: emit name <-> ID mapping in simpletrace header Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 20:12 ` Eric Blake
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 13/20] trace: provide mechanism for registering trace events Daniel P. Berrange
` (10 subsequent siblings)
22 siblings, 1 reply; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
If the ftrace backend is compiled into QEMU, any attempt
to start QEMU while non-root will fail due to the
inability to open /sys/kernel/debug/tracing/tracing_on.
Add a fallback into the code so that it connects up the
trace_marker_fd variable to /dev/null when setting
EACCESS on the 'trace_on' file. This allows QEMU to
run, with ftrace turned into a no-op.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
trace/ftrace.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/trace/ftrace.c b/trace/ftrace.c
index e953922..3588bb0 100644
--- a/trace/ftrace.c
+++ b/trace/ftrace.c
@@ -51,6 +51,12 @@ bool ftrace_init(void)
snprintf(path, PATH_MAX, "%s/tracing/tracing_on", debugfs);
trace_fd = open(path, O_WRONLY);
if (trace_fd < 0) {
+ if (errno == EACCES) {
+ trace_marker_fd = open("/dev/null", O_WRONLY);
+ if (trace_marker_fd != -1) {
+ return true;
+ }
+ }
perror("Could not open ftrace 'tracing_on' file");
return false;
} else {
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 13/20] trace: provide mechanism for registering trace events
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (11 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 12/20] trace: don't abort qemu if ftrace can't be initialized Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 14/20] trace: dynamically allocate trace_dstate in CPUState Daniel P. Berrange
` (9 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
Remove the notion of there being a single global array
of trace events, by introducing a method for registering
groups of events.
The module_call_init() needs to be invoked at the start
of any program that wants to make use of the trace
support. Currently this covers system emulators qemu-nbd,
qemu-img and qemu-io.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
include/qemu/module.h | 2 ++
qemu-img.c | 1 +
qemu-io.c | 1 +
qemu-nbd.c | 1 +
scripts/tracetool/format/events_c.py | 6 ++++++
trace/control-internal.h | 4 +++-
trace/control.c | 25 +++++++++++++++++++++++--
trace/control.h | 1 +
vl.c | 2 ++
9 files changed, 40 insertions(+), 3 deletions(-)
diff --git a/include/qemu/module.h b/include/qemu/module.h
index dc2c9d4..877cca7 100644
--- a/include/qemu/module.h
+++ b/include/qemu/module.h
@@ -44,6 +44,7 @@ typedef enum {
MODULE_INIT_OPTS,
MODULE_INIT_QAPI,
MODULE_INIT_QOM,
+ MODULE_INIT_TRACE,
MODULE_INIT_MAX
} module_init_type;
@@ -51,6 +52,7 @@ typedef enum {
#define opts_init(function) module_init(function, MODULE_INIT_OPTS)
#define qapi_init(function) module_init(function, MODULE_INIT_QAPI)
#define type_init(function) module_init(function, MODULE_INIT_QOM)
+#define trace_init(function) module_init(function, MODULE_INIT_TRACE)
#define block_module_load_one(lib) module_load_one("block-", lib)
diff --git a/qemu-img.c b/qemu-img.c
index ceffefe..02c07b9 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -4165,6 +4165,7 @@ int main(int argc, char **argv)
signal(SIGPIPE, SIG_IGN);
#endif
+ module_call_init(MODULE_INIT_TRACE);
error_set_progname(argv[0]);
qemu_init_exec_dir(argv[0]);
diff --git a/qemu-io.c b/qemu-io.c
index db129ea..23a229f 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -467,6 +467,7 @@ int main(int argc, char **argv)
signal(SIGPIPE, SIG_IGN);
#endif
+ module_call_init(MODULE_INIT_TRACE);
progname = basename(argv[0]);
qemu_init_exec_dir(argv[0]);
diff --git a/qemu-nbd.c b/qemu-nbd.c
index 99297a5..361880b 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -533,6 +533,7 @@ int main(int argc, char **argv)
sa_sigterm.sa_handler = termsig_handler;
sigaction(SIGTERM, &sa_sigterm, NULL);
+ module_call_init(MODULE_INIT_TRACE);
qcrypto_init(&error_fatal);
module_call_init(MODULE_INIT_QOM);
diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py
index 40ae395..8817555 100644
--- a/scripts/tracetool/format/events_c.py
+++ b/scripts/tracetool/format/events_c.py
@@ -60,3 +60,9 @@ def generate(events, backend):
out(' NULL,',
'};',
'')
+
+ out('static void trace_register_events(void)',
+ '{',
+ ' trace_event_register_group(trace_events);',
+ '}',
+ 'trace_init(trace_register_events)')
diff --git a/trace/control-internal.h b/trace/control-internal.h
index 9abbc96..a9d395a 100644
--- a/trace/control-internal.h
+++ b/trace/control-internal.h
@@ -15,7 +15,6 @@
#include "qom/cpu.h"
-extern TraceEvent *trace_events[];
extern int trace_events_enabled_count;
@@ -83,4 +82,7 @@ static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu,
return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, vcpu_id);
}
+
+void trace_event_register_group(TraceEvent **events);
+
#endif /* TRACE__CONTROL_INTERNAL_H */
diff --git a/trace/control.c b/trace/control.c
index 6b32511..a231327 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -29,6 +29,13 @@
int trace_events_enabled_count;
+typedef struct TraceEventGroup {
+ TraceEvent **events;
+} TraceEventGroup;
+
+static TraceEventGroup *event_groups;
+static size_t nevent_groups;
+
QemuOptsList qemu_trace_opts = {
.name = "trace",
.implied_opt_name = "enable",
@@ -50,6 +57,14 @@ QemuOptsList qemu_trace_opts = {
};
+void trace_event_register_group(TraceEvent **events)
+{
+ event_groups = g_renew(TraceEventGroup, event_groups, nevent_groups + 1);
+ event_groups[nevent_groups].events = events;
+ nevent_groups++;
+}
+
+
TraceEvent *trace_event_name(const char *name)
{
assert(name != NULL);
@@ -100,14 +115,20 @@ static bool pattern_glob(const char *pat, const char *ev)
void trace_event_iter_init(TraceEventIter *iter, const char *pattern)
{
iter->event = 0;
+ iter->group = 0;
iter->pattern = pattern;
}
TraceEvent *trace_event_iter_next(TraceEventIter *iter)
{
- while (trace_events[iter->event] != NULL) {
- TraceEvent *ev = trace_events[iter->event];
+ while (iter->group < nevent_groups &&
+ event_groups[iter->group].events[iter->event] != NULL) {
+ TraceEvent *ev = event_groups[iter->group].events[iter->event];
iter->event++;
+ if (event_groups[iter->group].events[iter->event] == NULL) {
+ iter->event = 0;
+ iter->group++;
+ }
if (!iter->pattern ||
pattern_glob(iter->pattern,
trace_event_get_name(ev))) {
diff --git a/trace/control.h b/trace/control.h
index cccd2a2..3f30a0c 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -15,6 +15,7 @@
typedef struct TraceEventIter {
size_t event;
+ size_t group;
const char *pattern;
} TraceEventIter;
diff --git a/vl.c b/vl.c
index f3abd99..610539a 100644
--- a/vl.c
+++ b/vl.c
@@ -3020,6 +3020,8 @@ int main(int argc, char **argv, char **envp)
Error *err = NULL;
bool list_data_dirs = false;
+ module_call_init(MODULE_INIT_TRACE);
+
qemu_init_cpu_list();
qemu_init_cpu_loop();
qemu_mutex_lock_iothread();
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 14/20] trace: dynamically allocate trace_dstate in CPUState
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (12 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 13/20] trace: provide mechanism for registering trace events Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 15/20] trace: dynamically allocate event IDs at runtime Daniel P. Berrange
` (8 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
The CPUState struct has a bitmap tracking which VCPU
events are currently active. This is indexed based on
the event ID values, and sized according the maximum
TraceEventVCPUID enum value.
When we start dynamically assigning IDs at runtime,
we can't statically declare a bitmap without making
an assumption about the max event count. This problem
can be solved by dynamically allocating the per-CPU
dstate bitmap.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
include/qom/cpu.h | 9 ++++++---
qom/cpu.c | 7 +++++--
trace/control.c | 5 +++++
trace/control.h | 7 +++++++
4 files changed, 23 insertions(+), 5 deletions(-)
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 22b54d6..6d481a1 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -27,7 +27,6 @@
#include "qemu/bitmap.h"
#include "qemu/queue.h"
#include "qemu/thread.h"
-#include "trace/generated-events.h"
typedef int (*WriteCoreDumpFunction)(const void *buf, size_t size,
void *opaque);
@@ -345,8 +344,12 @@ struct CPUState {
struct KVMState *kvm_state;
struct kvm_run *kvm_run;
- /* Used for events with 'vcpu' and *without* the 'disabled' properties */
- DECLARE_BITMAP(trace_dstate, TRACE_VCPU_EVENT_COUNT);
+ /*
+ * Used for events with 'vcpu' and *without* the 'disabled' properties.
+ * Dynamically allocated based on bitmap requried to hold up to
+ * trace_get_vcpu_event_count() entries.
+ */
+ unsigned long *trace_dstate;
/* TODO Move common fields from CPUArchState here. */
int cpu_index; /* used by alpha TCG */
diff --git a/qom/cpu.c b/qom/cpu.c
index 484c493..40f2eb1 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -356,12 +356,15 @@ static void cpu_common_initfn(Object *obj)
qemu_mutex_init(&cpu->work_mutex);
QTAILQ_INIT(&cpu->breakpoints);
QTAILQ_INIT(&cpu->watchpoints);
- bitmap_zero(cpu->trace_dstate, TRACE_VCPU_EVENT_COUNT);
+
+ cpu->trace_dstate = bitmap_new(trace_get_vcpu_event_count());
}
static void cpu_common_finalize(Object *obj)
{
- cpu_exec_exit(CPU(obj));
+ CPUState *cpu = CPU(obj);
+ cpu_exec_exit(cpu);
+ g_free(cpu->trace_dstate);
}
static int64_t cpu_common_get_arch_id(CPUState *cpu)
diff --git a/trace/control.c b/trace/control.c
index a231327..5f10e2d 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -290,3 +290,8 @@ char *trace_opt_parse(const char *optarg)
return trace_file;
}
+
+uint32_t trace_get_vcpu_event_count(void)
+{
+ return TRACE_VCPU_EVENT_COUNT;
+}
diff --git a/trace/control.h b/trace/control.h
index 3f30a0c..69635bf 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -232,6 +232,13 @@ extern QemuOptsList qemu_trace_opts;
*/
char *trace_opt_parse(const char *optarg);
+/**
+ * trace_get_vcpu_event_count:
+ *
+ * Return the number of known vcpu-specific events
+ */
+uint32_t trace_get_vcpu_event_count(void);
+
#include "trace/control-internal.h"
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 15/20] trace: dynamically allocate event IDs at runtime
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (13 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 14/20] trace: dynamically allocate trace_dstate in CPUState Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 16/20] trace: get rid of generated-events.h/generated-events.c Daniel P. Berrange
` (7 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
Instead of having the code generator assign event IDs and
event VCPU IDs, assign them when the events are registered
at runtime. This will allow code to be generated from
individual trace-events without having to figure out
globally unique numbering at build time.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
scripts/tracetool/format/events_c.py | 10 ++--------
scripts/tracetool/format/events_h.py | 4 ----
trace/control.c | 11 ++++++++++-
3 files changed, 12 insertions(+), 13 deletions(-)
diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py
index 8817555..a976c22 100644
--- a/scripts/tracetool/format/events_c.py
+++ b/scripts/tracetool/format/events_c.py
@@ -28,25 +28,19 @@ def generate(events, backend):
for e in events:
out('uint16_t %s;' % e.api(e.QEMU_DSTATE))
- next_id = 0
- next_vcpu_id = 0
for e in events:
- id = next_id
- next_id += 1
if "vcpu" in e.properties:
- vcpu_id = next_vcpu_id
- next_vcpu_id += 1
+ vcpu_id = 0
else:
vcpu_id = "TRACE_VCPU_EVENT_NONE"
out('TraceEvent %(event)s = {',
- ' .id = %(id)s,',
+ ' .id = 0,',
' .vcpu_id = %(vcpu_id)s,',
' .name = \"%(name)s\",',
' .sstate = %(sstate)s,',
' .dstate = &%(dstate)s ',
'};',
event = e.api(e.QEMU_EVENT),
- id = id,
vcpu_id = vcpu_id,
name = e.name,
sstate = "TRACE_%s_ENABLED" % e.name.upper(),
diff --git a/scripts/tracetool/format/events_h.py b/scripts/tracetool/format/events_h.py
index ca6d730..1cb332b 100644
--- a/scripts/tracetool/format/events_h.py
+++ b/scripts/tracetool/format/events_h.py
@@ -32,10 +32,6 @@ def generate(events, backend):
for e in events:
out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
- numvcpu = len([e for e in events if "vcpu" in e.properties])
-
- out("#define TRACE_VCPU_EVENT_COUNT %d" % numvcpu)
-
# static state
for e in events:
if 'disable' in e.properties:
diff --git a/trace/control.c b/trace/control.c
index 5f10e2d..1a7bee6 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -35,6 +35,8 @@ typedef struct TraceEventGroup {
static TraceEventGroup *event_groups;
static size_t nevent_groups;
+static uint32_t next_id;
+static uint32_t next_vcpu_id;
QemuOptsList qemu_trace_opts = {
.name = "trace",
@@ -59,6 +61,13 @@ QemuOptsList qemu_trace_opts = {
void trace_event_register_group(TraceEvent **events)
{
+ size_t i;
+ for (i = 0; events[i] != NULL; i++) {
+ events[i]->id = next_id++;
+ if (events[i]->vcpu_id != TRACE_VCPU_EVENT_NONE) {
+ events[i]->vcpu_id = next_vcpu_id++;
+ }
+ }
event_groups = g_renew(TraceEventGroup, event_groups, nevent_groups + 1);
event_groups[nevent_groups].events = events;
nevent_groups++;
@@ -293,5 +302,5 @@ char *trace_opt_parse(const char *optarg)
uint32_t trace_get_vcpu_event_count(void)
{
- return TRACE_VCPU_EVENT_COUNT;
+ return next_vcpu_id;
}
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 16/20] trace: get rid of generated-events.h/generated-events.c
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (14 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 15/20] trace: dynamically allocate event IDs at runtime Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 17/20] trace: rename _read_events to read_events Daniel P. Berrange
` (6 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
Currently the generated-events.[ch] files contain the
event dstates, constants and TraceEvent structs, while the
generated-tracers.[ch] files contain the actual trace
probe logic. With the removal of usage of the event enums
from the API there is no longer any compelling reason for
the separation between these files. The generated-events.h
content is only ever needed from the generated-tracers.[ch]
files.
The enums/constants/structs from generated-events.[ch] are
thus moved into the generated-tracers.[ch], so that there
is one less file to be generated.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
Makefile | 3 --
include/trace-tcg.h | 1 -
include/trace.h | 1 -
scripts/tracetool/format/c.py | 50 ++++++++++++++++++++++++++---
scripts/tracetool/format/events_c.py | 62 ------------------------------------
scripts/tracetool/format/events_h.py | 49 ----------------------------
scripts/tracetool/format/h.py | 20 ++++++++++++
trace/Makefile.objs | 28 +++-------------
trace/control.h | 2 +-
trace/simple.h | 4 ---
10 files changed, 70 insertions(+), 150 deletions(-)
delete mode 100644 scripts/tracetool/format/events_c.py
delete mode 100644 scripts/tracetool/format/events_h.py
diff --git a/Makefile b/Makefile
index f103616..531acef 100644
--- a/Makefile
+++ b/Makefile
@@ -56,9 +56,6 @@ GENERATED_SOURCES += qmp-marshal.c qapi-types.c qapi-visit.c qapi-event.c
GENERATED_HEADERS += qmp-introspect.h
GENERATED_SOURCES += qmp-introspect.c
-GENERATED_HEADERS += trace/generated-events.h
-GENERATED_SOURCES += trace/generated-events.c
-
GENERATED_HEADERS += trace/generated-tracers.h
ifeq ($(findstring dtrace,$(TRACE_BACKENDS)),dtrace)
GENERATED_HEADERS += trace/generated-tracers-dtrace.h
diff --git a/include/trace-tcg.h b/include/trace-tcg.h
index edab4b1..da68608 100644
--- a/include/trace-tcg.h
+++ b/include/trace-tcg.h
@@ -2,6 +2,5 @@
#define TRACE_TCG_H
#include "trace/generated-tcg-tracers.h"
-#include "trace/generated-events.h"
#endif /* TRACE_TCG_H */
diff --git a/include/trace.h b/include/trace.h
index 9a01e44..ac9ff3d 100644
--- a/include/trace.h
+++ b/include/trace.h
@@ -2,6 +2,5 @@
#define TRACE_H
#include "trace/generated-tracers.h"
-#include "trace/generated-events.h"
#endif /* TRACE_H */
diff --git a/scripts/tracetool/format/c.py b/scripts/tracetool/format/c.py
index 699598f..7ac6d4c 100644
--- a/scripts/tracetool/format/c.py
+++ b/scripts/tracetool/format/c.py
@@ -17,12 +17,52 @@ from tracetool import out
def generate(events, backend):
- events = [e for e in events
- if "disable" not in e.properties]
+ active_events = [e for e in events
+ if "disable" not in e.properties]
out('/* This file is autogenerated by tracetool, do not edit. */',
+ '',
+ '#include "qemu/osdep.h"',
+ '#include "trace.h"',
'')
- backend.generate_begin(events)
- for event in events:
+
+ for e in events:
+ out('uint16_t %s;' % e.api(e.QEMU_DSTATE))
+
+ for e in events:
+ if "vcpu" in e.properties:
+ vcpu_id = 0
+ else:
+ vcpu_id = "TRACE_VCPU_EVENT_NONE"
+ out('TraceEvent %(event)s = {',
+ ' .id = 0,',
+ ' .vcpu_id = %(vcpu_id)s,',
+ ' .name = \"%(name)s\",',
+ ' .sstate = %(sstate)s,',
+ ' .dstate = &%(dstate)s ',
+ '};',
+ event = e.api(e.QEMU_EVENT),
+ vcpu_id = vcpu_id,
+ name = e.name,
+ sstate = "TRACE_%s_ENABLED" % e.name.upper(),
+ dstate = e.api(e.QEMU_DSTATE))
+
+ out('TraceEvent *trace_events[] = {')
+
+ for e in events:
+ out(' &%(event)s,', event = e.api(e.QEMU_EVENT))
+
+ out(' NULL,',
+ '};',
+ '')
+
+ out('static void trace_register_events(void)',
+ '{',
+ ' trace_event_register_group(trace_events);',
+ '}',
+ 'trace_init(trace_register_events)')
+
+ backend.generate_begin(active_events)
+ for event in active_events:
backend.generate(event)
- backend.generate_end(events)
+ backend.generate_end(active_events)
diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py
deleted file mode 100644
index a976c22..0000000
--- a/scripts/tracetool/format/events_c.py
+++ /dev/null
@@ -1,62 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-trace/generated-events.c
-"""
-
-__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
-__license__ = "GPL version 2 or (at your option) any later version"
-
-__maintainer__ = "Stefan Hajnoczi"
-__email__ = "stefanha@linux.vnet.ibm.com"
-
-
-from tracetool import out
-
-
-def generate(events, backend):
- out('/* This file is autogenerated by tracetool, do not edit. */',
- '',
- '#include "qemu/osdep.h"',
- '#include "trace.h"',
- '#include "trace/generated-events.h"',
- '#include "trace/control.h"',
- '')
-
- for e in events:
- out('uint16_t %s;' % e.api(e.QEMU_DSTATE))
-
- for e in events:
- if "vcpu" in e.properties:
- vcpu_id = 0
- else:
- vcpu_id = "TRACE_VCPU_EVENT_NONE"
- out('TraceEvent %(event)s = {',
- ' .id = 0,',
- ' .vcpu_id = %(vcpu_id)s,',
- ' .name = \"%(name)s\",',
- ' .sstate = %(sstate)s,',
- ' .dstate = &%(dstate)s ',
- '};',
- event = e.api(e.QEMU_EVENT),
- vcpu_id = vcpu_id,
- name = e.name,
- sstate = "TRACE_%s_ENABLED" % e.name.upper(),
- dstate = e.api(e.QEMU_DSTATE))
-
- out('TraceEvent *trace_events[] = {')
-
- for e in events:
- out(' &%(event)s,', event = e.api(e.QEMU_EVENT))
-
- out(' NULL,',
- '};',
- '')
-
- out('static void trace_register_events(void)',
- '{',
- ' trace_event_register_group(trace_events);',
- '}',
- 'trace_init(trace_register_events)')
diff --git a/scripts/tracetool/format/events_h.py b/scripts/tracetool/format/events_h.py
deleted file mode 100644
index 1cb332b..0000000
--- a/scripts/tracetool/format/events_h.py
+++ /dev/null
@@ -1,49 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-trace/generated-events.h
-"""
-
-__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
-__license__ = "GPL version 2 or (at your option) any later version"
-
-__maintainer__ = "Stefan Hajnoczi"
-__email__ = "stefanha@linux.vnet.ibm.com"
-
-
-from tracetool import out
-
-
-def generate(events, backend):
- out('/* This file is autogenerated by tracetool, do not edit. */',
- '',
- '#ifndef TRACE__GENERATED_EVENTS_H',
- '#define TRACE__GENERATED_EVENTS_H',
- '',
- '#include "trace/event-internal.h"',
- )
-
- for e in events:
- out('extern TraceEvent %(event)s;',
- event = e.api(e.QEMU_EVENT))
-
- for e in events:
- out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
-
- # static state
- for e in events:
- if 'disable' in e.properties:
- enabled = 0
- else:
- enabled = 1
- if "tcg-exec" in e.properties:
- # a single define for the two "sub-events"
- out('#define TRACE_%(name)s_ENABLED %(enabled)d',
- name=e.original.name.upper(),
- enabled=enabled)
- out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
-
- out('',
- '#endif /* TRACE__GENERATED_EVENTS_H */')
diff --git a/scripts/tracetool/format/h.py b/scripts/tracetool/format/h.py
index 64a6680..f4748c3 100644
--- a/scripts/tracetool/format/h.py
+++ b/scripts/tracetool/format/h.py
@@ -26,6 +26,26 @@ def generate(events, backend):
'#include "trace/control.h"',
'')
+ for e in events:
+ out('extern TraceEvent %(event)s;',
+ event = e.api(e.QEMU_EVENT))
+
+ for e in events:
+ out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
+
+ # static state
+ for e in events:
+ if 'disable' in e.properties:
+ enabled = 0
+ else:
+ enabled = 1
+ if "tcg-exec" in e.properties:
+ # a single define for the two "sub-events"
+ out('#define TRACE_%(name)s_ENABLED %(enabled)d',
+ name=e.original.name.upper(),
+ enabled=enabled)
+ out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
+
backend.generate_begin(events)
for e in events:
diff --git a/trace/Makefile.objs b/trace/Makefile.objs
index 4d91b3b..83f754e 100644
--- a/trace/Makefile.objs
+++ b/trace/Makefile.objs
@@ -32,32 +32,11 @@ $(obj)/generated-ust.c-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
--backends=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
-$(obj)/generated-events.h: $(obj)/generated-ust-provider.h
-$(obj)/generated-events.c: $(obj)/generated-ust.c
+$(obj)/generated-tracers.h: $(obj)/generated-ust-provider.h
+$(obj)/generated-tracers.c: $(obj)/generated-ust.c
endif
-######################################################################
-# Auto-generated event descriptions
-
-$(obj)/generated-events.h: $(obj)/generated-events.h-timestamp
- @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-events.h-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
- $(call quiet-command,$(TRACETOOL) \
- --format=events-h \
- --backends=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
-
-$(obj)/generated-events.c: $(obj)/generated-events.c-timestamp $(BUILD_DIR)/config-host.mak
- @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-events.c-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
- $(call quiet-command,$(TRACETOOL) \
- --format=events-c \
- --backends=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
-
-util-obj-y += generated-events.o
-
######################################################################
# Auto-generated tracing routines
@@ -154,7 +133,8 @@ $(obj)/generated-tcg-tracers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_
######################################################################
# Backend code
-util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o generated-tracers.o
+util-obj-y += generated-tracers.o
+util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o
util-obj-$(CONFIG_TRACE_FTRACE) += ftrace.o
util-obj-$(CONFIG_TRACE_UST) += generated-ust.o
util-obj-y += control.o
diff --git a/trace/control.h b/trace/control.h
index 69635bf..ccaeac8 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -11,7 +11,7 @@
#define TRACE__CONTROL_H
#include "qemu-common.h"
-#include "trace/generated-events.h"
+#include "event-internal.h"
typedef struct TraceEventIter {
size_t event;
diff --git a/trace/simple.h b/trace/simple.h
index 17ce472..9931808 100644
--- a/trace/simple.h
+++ b/trace/simple.h
@@ -11,10 +11,6 @@
#ifndef TRACE_SIMPLE_H
#define TRACE_SIMPLE_H
-
-#include "trace/generated-events.h"
-
-
void st_print_trace_file_status(FILE *stream, fprintf_function stream_printf);
void st_set_trace_file_enabled(bool enable);
void st_set_trace_file(const char *file);
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 17/20] trace: rename _read_events to read_events
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (15 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 16/20] trace: get rid of generated-events.h/generated-events.c Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 18/20] trace: push reading of events up a level to tracetool main Daniel P. Berrange
` (5 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
The _read_events method is used by callers outside of
its module, so should be a public method, not private.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
scripts/simpletrace.py | 6 +++---
scripts/tracetool/__init__.py | 14 ++++++++++++--
2 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/scripts/simpletrace.py b/scripts/simpletrace.py
index f40467a..4ca903d 100755
--- a/scripts/simpletrace.py
+++ b/scripts/simpletrace.py
@@ -12,7 +12,7 @@
import struct
import re
import inspect
-from tracetool import _read_events, Event
+from tracetool import read_events, Event
from tracetool.backend.simple import is_string
header_event_id = 0xffffffffffffffff
@@ -129,7 +129,7 @@ class Analyzer(object):
def process(events, log, analyzer, read_header=True):
"""Invoke an analyzer on each event in a log."""
if isinstance(events, str):
- events = _read_events(open(events, 'r'))
+ events = read_events(open(events, 'r'))
if isinstance(log, str):
log = open(log, 'rb')
@@ -188,7 +188,7 @@ def run(analyzer):
'<trace-file>\n' % sys.argv[0])
sys.exit(1)
- events = _read_events(open(sys.argv[1], 'r'))
+ events = read_events(open(sys.argv[1], 'r'))
process(events, sys.argv[2], analyzer, read_header=read_header)
if __name__ == '__main__':
diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py
index dc93416..bf01e93 100644
--- a/scripts/tracetool/__init__.py
+++ b/scripts/tracetool/__init__.py
@@ -282,7 +282,17 @@ class Event(object):
self)
-def _read_events(fobj):
+def read_events(fobj):
+ """Generate the output for the given (format, backends) pair.
+
+ Parameters
+ ----------
+ fobj : file
+ Event description file.
+
+ Returns a list of Event objects
+ """
+
events = []
for line in fobj:
if not line.strip():
@@ -391,6 +401,6 @@ def generate(fevents, format, backends,
tracetool.backend.dtrace.BINARY = binary
tracetool.backend.dtrace.PROBEPREFIX = probe_prefix
- events = _read_events(fevents)
+ events = read_events(fevents)
tracetool.format.generate(events, format, backend)
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 18/20] trace: push reading of events up a level to tracetool main
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (16 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 17/20] trace: rename _read_events to read_events Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 19/20] trace: pass trace-events to tracetool as a positional param Daniel P. Berrange
` (4 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
Move the reading of events out of the 'tracetool.generate'
method and into tracetool.main, so that the latter is not
tied to generating from a single source of events.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
scripts/tracetool.py | 4 +++-
scripts/tracetool/__init__.py | 8 +++-----
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/scripts/tracetool.py b/scripts/tracetool.py
index 7b82959..6accbbf 100755
--- a/scripts/tracetool.py
+++ b/scripts/tracetool.py
@@ -129,8 +129,10 @@ def main(args):
if probe_prefix is None:
probe_prefix = ".".join(["qemu", target_type, target_name])
+ events = tracetool.read_events(sys.stdin)
+
try:
- tracetool.generate(sys.stdin, arg_format, arg_backends,
+ tracetool.generate(events, arg_format, arg_backends,
binary=binary, probe_prefix=probe_prefix)
except tracetool.TracetoolError as e:
error_opt(str(e))
diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py
index bf01e93..ac2cb8f 100644
--- a/scripts/tracetool/__init__.py
+++ b/scripts/tracetool/__init__.py
@@ -364,14 +364,14 @@ def try_import(mod_name, attr_name=None, attr_default=None):
return False, None
-def generate(fevents, format, backends,
+def generate(events, format, backends,
binary=None, probe_prefix=None):
"""Generate the output for the given (format, backends) pair.
Parameters
----------
- fevents : file
- Event description file.
+ events : list
+ list of Event objects to generate for
format : str
Output format name.
backends : list
@@ -401,6 +401,4 @@ def generate(fevents, format, backends,
tracetool.backend.dtrace.BINARY = binary
tracetool.backend.dtrace.PROBEPREFIX = probe_prefix
- events = read_events(fevents)
-
tracetool.format.generate(events, format, backend)
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 19/20] trace: pass trace-events to tracetool as a positional param
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (17 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 18/20] trace: push reading of events up a level to tracetool main Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 20/20] trace: introduce a formal group name for trace events Daniel P. Berrange
` (3 subsequent siblings)
22 siblings, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
Instead of reading the contents of 'trace-events' from stdin,
accept the filename as a positional parameter. This also
allows for reading from multiple files, though this facility
is not used at this time.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
Makefile.target | 6 +++---
scripts/tracetool.py | 5 ++++-
trace/Makefile.objs | 18 +++++++++---------
3 files changed, 16 insertions(+), 13 deletions(-)
diff --git a/Makefile.target b/Makefile.target
index 19cc49c..a345342 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -55,7 +55,7 @@ $(QEMU_PROG).stp-installed: $(BUILD_DIR)/trace-events-all
--binary=$(bindir)/$(QEMU_PROG) \
--target-name=$(TARGET_NAME) \
--target-type=$(TARGET_TYPE) \
- < $< > $@," GEN $(TARGET_DIR)$(QEMU_PROG).stp-installed")
+ $< > $@," GEN $(TARGET_DIR)$(QEMU_PROG).stp-installed")
$(QEMU_PROG).stp: $(BUILD_DIR)/trace-events-all
$(call quiet-command,$(TRACETOOL) \
@@ -64,14 +64,14 @@ $(QEMU_PROG).stp: $(BUILD_DIR)/trace-events-all
--binary=$(realpath .)/$(QEMU_PROG) \
--target-name=$(TARGET_NAME) \
--target-type=$(TARGET_TYPE) \
- < $< > $@," GEN $(TARGET_DIR)$(QEMU_PROG).stp")
+ $< > $@," GEN $(TARGET_DIR)$(QEMU_PROG).stp")
$(QEMU_PROG)-simpletrace.stp: $(BUILD_DIR)/trace-events-all
$(call quiet-command,$(TRACETOOL) \
--format=simpletrace-stap \
--backends=$(TRACE_BACKENDS) \
--probe-prefix=qemu.$(TARGET_TYPE).$(TARGET_NAME) \
- < $< > $@," GEN $(TARGET_DIR)$(QEMU_PROG)-simpletrace.stp")
+ $< > $@," GEN $(TARGET_DIR)$(QEMU_PROG)-simpletrace.stp")
else
stap:
diff --git a/scripts/tracetool.py b/scripts/tracetool.py
index 6accbbf..f66e767 100755
--- a/scripts/tracetool.py
+++ b/scripts/tracetool.py
@@ -129,7 +129,10 @@ def main(args):
if probe_prefix is None:
probe_prefix = ".".join(["qemu", target_type, target_name])
- events = tracetool.read_events(sys.stdin)
+ if len(args) != 1:
+ error_opt("missing trace-events filepath")
+ with open(args[0], "r") as fh:
+ events = tracetool.read_events(fh)
try:
tracetool.generate(events, arg_format, arg_backends,
diff --git a/trace/Makefile.objs b/trace/Makefile.objs
index 83f754e..524c4c9 100644
--- a/trace/Makefile.objs
+++ b/trace/Makefile.objs
@@ -22,7 +22,7 @@ $(obj)/generated-ust-provider.h-timestamp: $(BUILD_DIR)/trace-events-all $(trace
$(call quiet-command,$(TRACETOOL) \
--format=ust-events-h \
--backends=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ $< > $@," GEN $(patsubst %-timestamp,%,$@)")
$(obj)/generated-ust.c: $(obj)/generated-ust.c-timestamp $(BUILD_DIR)/config-host.mak
@cmp $< $@ >/dev/null 2>&1 || cp $< $@
@@ -30,7 +30,7 @@ $(obj)/generated-ust.c-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=ust-events-c \
--backends=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ $< > $@," GEN $(patsubst %-timestamp,%,$@)")
$(obj)/generated-tracers.h: $(obj)/generated-ust-provider.h
$(obj)/generated-tracers.c: $(obj)/generated-ust.c
@@ -50,7 +50,7 @@ $(obj)/generated-tracers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)
$(call quiet-command,$(TRACETOOL) \
--format=h \
--backends=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ $< > $@," GEN $(patsubst %-timestamp,%,$@)")
##############################
# non-DTrace
@@ -61,7 +61,7 @@ $(obj)/generated-tracers.c-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)
$(call quiet-command,$(TRACETOOL) \
--format=c \
--backends=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ $< > $@," GEN $(patsubst %-timestamp,%,$@)")
$(obj)/generated-tracers.o: $(obj)/generated-tracers.c $(obj)/generated-tracers.h
@@ -79,7 +79,7 @@ $(obj)/generated-tracers-dtrace.dtrace-timestamp: $(BUILD_DIR)/trace-events-all
$(call quiet-command,$(TRACETOOL) \
--format=d \
--backends=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ $< > $@," GEN $(patsubst %-timestamp,%,$@)")
$(obj)/generated-tracers-dtrace.h: $(obj)/generated-tracers-dtrace.dtrace
$(call quiet-command,dtrace -o $@ -h -s $<, " GEN $@")
@@ -98,7 +98,7 @@ $(obj)/generated-helpers-wrappers.h-timestamp: $(BUILD_DIR)/trace-events-all $(B
$(call quiet-command,$(TRACETOOL) \
--format=tcg-helper-wrapper-h \
--backend=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ $< > $@," GEN $(patsubst %-timestamp,%,$@)")
$(obj)/generated-helpers.h: $(obj)/generated-helpers.h-timestamp
@cmp $< $@ >/dev/null 2>&1 || cp $< $@
@@ -106,7 +106,7 @@ $(obj)/generated-helpers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)
$(call quiet-command,$(TRACETOOL) \
--format=tcg-helper-h \
--backend=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ $< > $@," GEN $(patsubst %-timestamp,%,$@)")
$(obj)/generated-helpers.c: $(obj)/generated-helpers.c-timestamp
@cmp $< $@ >/dev/null 2>&1 || cp $< $@
@@ -114,7 +114,7 @@ $(obj)/generated-helpers.c-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)
$(call quiet-command,$(TRACETOOL) \
--format=tcg-helper-c \
--backend=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ $< > $@," GEN $(patsubst %-timestamp,%,$@)")
$(obj)/generated-helpers.o: $(obj)/generated-helpers.c
@@ -127,7 +127,7 @@ $(obj)/generated-tcg-tracers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_
$(call quiet-command,$(TRACETOOL) \
--format=tcg-h \
--backend=$(TRACE_BACKENDS) \
- < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ $< > $@," GEN $(patsubst %-timestamp,%,$@)")
######################################################################
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 20/20] trace: introduce a formal group name for trace events
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (18 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 19/20] trace: pass trace-events to tracetool as a positional param Daniel P. Berrange
@ 2016-10-04 13:35 ` Daniel P. Berrange
2016-10-05 9:53 ` Lluís Vilanova
2016-10-05 15:31 ` [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Stefan Hajnoczi
` (2 subsequent siblings)
22 siblings, 1 reply; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-04 13:35 UTC (permalink / raw)
To: qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi, Daniel P. Berrange
The declarations in the generated-tracers.h file are
assuming there's only ever going to be one instance
of this header, as they are not namespaced. When we
have one header per event group, if a single source
file needs to include multiple sets of trace events,
the symbols will all clash.
This change thus introduces a '--group NAME' arg to the
'tracetool' program. This will cause all the symbols in
the generated header files to be given a unique namespace.
If no group is given, the group name 'common' is used,
which is suitable for the current usage where there is
only one global trace-events file used for code generation.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
scripts/tracetool.py | 15 ++++++++++++++-
scripts/tracetool/__init__.py | 6 ++++--
scripts/tracetool/backend/__init__.py | 12 ++++++------
scripts/tracetool/backend/dtrace.py | 4 ++--
scripts/tracetool/backend/ftrace.py | 4 ++--
scripts/tracetool/backend/log.py | 4 ++--
scripts/tracetool/backend/simple.py | 8 ++++----
scripts/tracetool/backend/syslog.py | 4 ++--
scripts/tracetool/backend/ust.py | 4 ++--
scripts/tracetool/format/__init__.py | 4 ++--
scripts/tracetool/format/c.py | 18 ++++++++++--------
scripts/tracetool/format/d.py | 2 +-
scripts/tracetool/format/h.py | 14 +++++++-------
scripts/tracetool/format/simpletrace_stap.py | 2 +-
scripts/tracetool/format/stap.py | 2 +-
scripts/tracetool/format/tcg_h.py | 8 ++++----
scripts/tracetool/format/tcg_helper_c.py | 2 +-
scripts/tracetool/format/tcg_helper_h.py | 2 +-
scripts/tracetool/format/tcg_helper_wrapper_h.py | 2 +-
scripts/tracetool/format/ust_events_c.py | 2 +-
scripts/tracetool/format/ust_events_h.py | 9 +++++----
21 files changed, 73 insertions(+), 55 deletions(-)
diff --git a/scripts/tracetool.py b/scripts/tracetool.py
index f66e767..629b259 100755
--- a/scripts/tracetool.py
+++ b/scripts/tracetool.py
@@ -15,6 +15,8 @@ __email__ = "stefanha@linux.vnet.ibm.com"
import sys
import getopt
+import os.path
+import re
from tracetool import error_write, out
import tracetool.backend
@@ -60,6 +62,15 @@ Options:
else:
sys.exit(1)
+def make_group_name(filename):
+ dirname = os.path.realpath(os.path.dirname(filename))
+ basedir = os.path.join(os.path.dirname(__file__), os.pardir)
+ basedir = os.path.realpath(os.path.abspath(basedir))
+ dirname = dirname[len(basedir) + 1:]
+
+ if dirname == "":
+ return "common"
+ return re.sub(r"/|-", "_", dirname)
def main(args):
global _SCRIPT
@@ -134,8 +145,10 @@ def main(args):
with open(args[0], "r") as fh:
events = tracetool.read_events(fh)
+ group = make_group_name(args[0])
+
try:
- tracetool.generate(events, arg_format, arg_backends,
+ tracetool.generate(events, group, arg_format, arg_backends,
binary=binary, probe_prefix=probe_prefix)
except tracetool.TracetoolError as e:
error_opt(str(e))
diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py
index ac2cb8f..365446f 100644
--- a/scripts/tracetool/__init__.py
+++ b/scripts/tracetool/__init__.py
@@ -364,7 +364,7 @@ def try_import(mod_name, attr_name=None, attr_default=None):
return False, None
-def generate(events, format, backends,
+def generate(events, group, format, backends,
binary=None, probe_prefix=None):
"""Generate the output for the given (format, backends) pair.
@@ -372,6 +372,8 @@ def generate(events, format, backends,
----------
events : list
list of Event objects to generate for
+ group: str
+ Name of the tracing group
format : str
Output format name.
backends : list
@@ -401,4 +403,4 @@ def generate(events, format, backends,
tracetool.backend.dtrace.BINARY = binary
tracetool.backend.dtrace.PROBEPREFIX = probe_prefix
- tracetool.format.generate(events, format, backend)
+ tracetool.format.generate(events, format, backend, group)
diff --git a/scripts/tracetool/backend/__init__.py b/scripts/tracetool/backend/__init__.py
index d4b6dab..f735a25 100644
--- a/scripts/tracetool/backend/__init__.py
+++ b/scripts/tracetool/backend/__init__.py
@@ -113,11 +113,11 @@ class Wrapper:
if func is not None:
func(*args, **kwargs)
- def generate_begin(self, events):
- self._run_function("generate_%s_begin", events)
+ def generate_begin(self, events, group):
+ self._run_function("generate_%s_begin", events, group)
- def generate(self, event):
- self._run_function("generate_%s", event)
+ def generate(self, event, group):
+ self._run_function("generate_%s", event, group)
- def generate_end(self, events):
- self._run_function("generate_%s_end", events)
+ def generate_end(self, events, group):
+ self._run_function("generate_%s_end", events, group)
diff --git a/scripts/tracetool/backend/dtrace.py b/scripts/tracetool/backend/dtrace.py
index ab9ecfa..79505c6 100644
--- a/scripts/tracetool/backend/dtrace.py
+++ b/scripts/tracetool/backend/dtrace.py
@@ -35,12 +35,12 @@ def binary():
return BINARY
-def generate_h_begin(events):
+def generate_h_begin(events, group):
out('#include "trace/generated-tracers-dtrace.h"',
'')
-def generate_h(event):
+def generate_h(event, group):
out(' QEMU_%(uppername)s(%(argnames)s);',
uppername=event.name.upper(),
argnames=", ".join(event.args.names()))
diff --git a/scripts/tracetool/backend/ftrace.py b/scripts/tracetool/backend/ftrace.py
index 4b83b44..db9fe7a 100644
--- a/scripts/tracetool/backend/ftrace.py
+++ b/scripts/tracetool/backend/ftrace.py
@@ -19,12 +19,12 @@ from tracetool import out
PUBLIC = True
-def generate_h_begin(events):
+def generate_h_begin(events, group):
out('#include "trace/ftrace.h"',
'')
-def generate_h(event):
+def generate_h(event, group):
argnames = ", ".join(event.args.names())
if len(event.args) > 0:
argnames = ", " + argnames
diff --git a/scripts/tracetool/backend/log.py b/scripts/tracetool/backend/log.py
index 426bb6e..4f4a4d3 100644
--- a/scripts/tracetool/backend/log.py
+++ b/scripts/tracetool/backend/log.py
@@ -19,12 +19,12 @@ from tracetool import out
PUBLIC = True
-def generate_h_begin(events):
+def generate_h_begin(events, group):
out('#include "qemu/log.h"',
'')
-def generate_h(event):
+def generate_h(event, group):
argnames = ", ".join(event.args.names())
if len(event.args) > 0:
argnames = ", " + argnames
diff --git a/scripts/tracetool/backend/simple.py b/scripts/tracetool/backend/simple.py
index 1114e35..9885e83 100644
--- a/scripts/tracetool/backend/simple.py
+++ b/scripts/tracetool/backend/simple.py
@@ -27,7 +27,7 @@ def is_string(arg):
return False
-def generate_h_begin(events):
+def generate_h_begin(events, group):
for event in events:
out('void _simple_%(api)s(%(args)s);',
api=event.api(),
@@ -35,13 +35,13 @@ def generate_h_begin(events):
out('')
-def generate_h(event):
+def generate_h(event, group):
out(' _simple_%(api)s(%(args)s);',
api=event.api(),
args=", ".join(event.args.names()))
-def generate_c_begin(events):
+def generate_c_begin(events, group):
out('#include "qemu/osdep.h"',
'#include "trace.h"',
'#include "trace/control.h"',
@@ -49,7 +49,7 @@ def generate_c_begin(events):
'')
-def generate_c(event):
+def generate_c(event, group):
out('void _simple_%(api)s(%(args)s)',
'{',
' TraceBufferRecord rec;',
diff --git a/scripts/tracetool/backend/syslog.py b/scripts/tracetool/backend/syslog.py
index 5f693bd..b8ff279 100644
--- a/scripts/tracetool/backend/syslog.py
+++ b/scripts/tracetool/backend/syslog.py
@@ -19,12 +19,12 @@ from tracetool import out
PUBLIC = True
-def generate_h_begin(events):
+def generate_h_begin(events, group):
out('#include <syslog.h>',
'')
-def generate_h(event):
+def generate_h(event, group):
argnames = ", ".join(event.args.names())
if len(event.args) > 0:
argnames = ", " + argnames
diff --git a/scripts/tracetool/backend/ust.py b/scripts/tracetool/backend/ust.py
index ed4c227..4594db6 100644
--- a/scripts/tracetool/backend/ust.py
+++ b/scripts/tracetool/backend/ust.py
@@ -19,13 +19,13 @@ from tracetool import out
PUBLIC = True
-def generate_h_begin(events):
+def generate_h_begin(events, group):
out('#include <lttng/tracepoint.h>',
'#include "trace/generated-ust-provider.h"',
'')
-def generate_h(event):
+def generate_h(event, group):
argnames = ", ".join(event.args.names())
if len(event.args) > 0:
argnames = ", " + argnames
diff --git a/scripts/tracetool/format/__init__.py b/scripts/tracetool/format/__init__.py
index 812570f..cf6e0e2 100644
--- a/scripts/tracetool/format/__init__.py
+++ b/scripts/tracetool/format/__init__.py
@@ -74,7 +74,7 @@ def exists(name):
return tracetool.try_import("tracetool.format." + name)[1]
-def generate(events, format, backend):
+def generate(events, format, backend, group):
if not exists(format):
raise ValueError("unknown format: %s" % format)
format = format.replace("-", "_")
@@ -82,4 +82,4 @@ def generate(events, format, backend):
"generate")[1]
if func is None:
raise AttributeError("format has no 'generate': %s" % format)
- func(events, backend)
+ func(events, backend, group)
diff --git a/scripts/tracetool/format/c.py b/scripts/tracetool/format/c.py
index 7ac6d4c..47115ed 100644
--- a/scripts/tracetool/format/c.py
+++ b/scripts/tracetool/format/c.py
@@ -16,7 +16,7 @@ __email__ = "stefanha@linux.vnet.ibm.com"
from tracetool import out
-def generate(events, backend):
+def generate(events, backend, group):
active_events = [e for e in events
if "disable" not in e.properties]
@@ -47,7 +47,8 @@ def generate(events, backend):
sstate = "TRACE_%s_ENABLED" % e.name.upper(),
dstate = e.api(e.QEMU_DSTATE))
- out('TraceEvent *trace_events[] = {')
+ out('TraceEvent *%(group)s_trace_events[] = {',
+ group = group.lower())
for e in events:
out(' &%(event)s,', event = e.api(e.QEMU_EVENT))
@@ -56,13 +57,14 @@ def generate(events, backend):
'};',
'')
- out('static void trace_register_events(void)',
+ out('static void trace_%(group)s_register_events(void)',
'{',
- ' trace_event_register_group(trace_events);',
+ ' trace_event_register_group(%(group)s_trace_events);',
'}',
- 'trace_init(trace_register_events)')
+ 'trace_init(trace_%(group)s_register_events)',
+ group = group.lower())
- backend.generate_begin(active_events)
+ backend.generate_begin(active_events, group)
for event in active_events:
- backend.generate(event)
- backend.generate_end(active_events)
+ backend.generate(event, group)
+ backend.generate_end(active_events, group)
diff --git a/scripts/tracetool/format/d.py b/scripts/tracetool/format/d.py
index c77d5b7..78397c2 100644
--- a/scripts/tracetool/format/d.py
+++ b/scripts/tracetool/format/d.py
@@ -29,7 +29,7 @@ RESERVED_WORDS = (
)
-def generate(events, backend):
+def generate(events, backend, group):
events = [e for e in events
if "disable" not in e.properties]
diff --git a/scripts/tracetool/format/h.py b/scripts/tracetool/format/h.py
index f4748c3..3682f4e 100644
--- a/scripts/tracetool/format/h.py
+++ b/scripts/tracetool/format/h.py
@@ -16,11 +16,11 @@ __email__ = "stefanha@linux.vnet.ibm.com"
from tracetool import out
-def generate(events, backend):
+def generate(events, backend, group):
out('/* This file is autogenerated by tracetool, do not edit. */',
'',
- '#ifndef TRACE__GENERATED_TRACERS_H',
- '#define TRACE__GENERATED_TRACERS_H',
+ '#ifndef TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
+ '#define TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
'',
'#include "qemu-common.h"',
'#include "trace/control.h"',
@@ -46,7 +46,7 @@ def generate(events, backend):
enabled=enabled)
out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
- backend.generate_begin(events)
+ backend.generate_begin(events, group)
for e in events:
if "vcpu" in e.properties:
@@ -68,11 +68,11 @@ def generate(events, backend):
cond=cond)
if "disable" not in e.properties:
- backend.generate(e)
+ backend.generate(e, group)
out(' }',
'}')
- backend.generate_end(events)
+ backend.generate_end(events, group)
- out('#endif /* TRACE__GENERATED_TRACERS_H */')
+ out('#endif /* TRACE_%s_GENERATED_TRACERS_H */' % group.upper())
diff --git a/scripts/tracetool/format/simpletrace_stap.py b/scripts/tracetool/format/simpletrace_stap.py
index ac3580f..c35e662 100644
--- a/scripts/tracetool/format/simpletrace_stap.py
+++ b/scripts/tracetool/format/simpletrace_stap.py
@@ -19,7 +19,7 @@ from tracetool.backend.simple import is_string
from tracetool.format.stap import stap_escape
-def generate(events, backend):
+def generate(events, backend, group):
out('/* This file is autogenerated by tracetool, do not edit. */',
'',
'global event_name_to_id_map',
diff --git a/scripts/tracetool/format/stap.py b/scripts/tracetool/format/stap.py
index 9e780f1..e8ef3e7 100644
--- a/scripts/tracetool/format/stap.py
+++ b/scripts/tracetool/format/stap.py
@@ -34,7 +34,7 @@ def stap_escape(identifier):
return identifier
-def generate(events, backend):
+def generate(events, backend, group):
events = [e for e in events
if "disable" not in e.properties]
diff --git a/scripts/tracetool/format/tcg_h.py b/scripts/tracetool/format/tcg_h.py
index e2331f2..5f213f6 100644
--- a/scripts/tracetool/format/tcg_h.py
+++ b/scripts/tracetool/format/tcg_h.py
@@ -27,12 +27,12 @@ def vcpu_transform_args(args):
])
-def generate(events, backend):
+def generate(events, backend, group):
out('/* This file is autogenerated by tracetool, do not edit. */',
'/* You must include this file after the inclusion of helper.h */',
'',
- '#ifndef TRACE__GENERATED_TCG_TRACERS_H',
- '#define TRACE__GENERATED_TCG_TRACERS_H',
+ '#ifndef TRACE_%s_GENERATED_TCG_TRACERS_H' % group.upper(),
+ '#define TRACE_%s_GENERATED_TCG_TRACERS_H' % group.upper(),
'',
'#include "trace.h"',
'#include "exec/helper-proto.h"',
@@ -63,4 +63,4 @@ def generate(events, backend):
out('}')
out('',
- '#endif /* TRACE__GENERATED_TCG_TRACERS_H */')
+ '#endif /* TRACE_%s_GENERATED_TCG_TRACERS_H */' % group.upper())
diff --git a/scripts/tracetool/format/tcg_helper_c.py b/scripts/tracetool/format/tcg_helper_c.py
index e3485b7..cc26e03 100644
--- a/scripts/tracetool/format/tcg_helper_c.py
+++ b/scripts/tracetool/format/tcg_helper_c.py
@@ -40,7 +40,7 @@ def vcpu_transform_args(args, mode):
assert False
-def generate(events, backend):
+def generate(events, backend, group):
events = [e for e in events
if "disable" not in e.properties]
diff --git a/scripts/tracetool/format/tcg_helper_h.py b/scripts/tracetool/format/tcg_helper_h.py
index dc76c15..6b184b6 100644
--- a/scripts/tracetool/format/tcg_helper_h.py
+++ b/scripts/tracetool/format/tcg_helper_h.py
@@ -18,7 +18,7 @@ from tracetool.transform import *
import tracetool.vcpu
-def generate(events, backend):
+def generate(events, backend, group):
events = [e for e in events
if "disable" not in e.properties]
diff --git a/scripts/tracetool/format/tcg_helper_wrapper_h.py b/scripts/tracetool/format/tcg_helper_wrapper_h.py
index 020f442..ff53447 100644
--- a/scripts/tracetool/format/tcg_helper_wrapper_h.py
+++ b/scripts/tracetool/format/tcg_helper_wrapper_h.py
@@ -18,7 +18,7 @@ from tracetool.transform import *
import tracetool.vcpu
-def generate(events, backend):
+def generate(events, backend, group):
events = [e for e in events
if "disable" not in e.properties]
diff --git a/scripts/tracetool/format/ust_events_c.py b/scripts/tracetool/format/ust_events_c.py
index 9967c7a..cd87d8a 100644
--- a/scripts/tracetool/format/ust_events_c.py
+++ b/scripts/tracetool/format/ust_events_c.py
@@ -16,7 +16,7 @@ __email__ = "stefanha@redhat.com"
from tracetool import out
-def generate(events, backend):
+def generate(events, backend, group):
events = [e for e in events
if "disabled" not in e.properties]
diff --git a/scripts/tracetool/format/ust_events_h.py b/scripts/tracetool/format/ust_events_h.py
index 3e8a7cd..d853155 100644
--- a/scripts/tracetool/format/ust_events_h.py
+++ b/scripts/tracetool/format/ust_events_h.py
@@ -16,7 +16,7 @@ __email__ = "stefanha@redhat.com"
from tracetool import out
-def generate(events, backend):
+def generate(events, backend, group):
events = [e for e in events
if "disabled" not in e.properties]
@@ -28,8 +28,9 @@ def generate(events, backend):
'#undef TRACEPOINT_INCLUDE_FILE',
'#define TRACEPOINT_INCLUDE_FILE ./generated-ust-provider.h',
'',
- '#if !defined (TRACE__GENERATED_UST_H) || defined(TRACEPOINT_HEADER_MULTI_READ)',
- '#define TRACE__GENERATED_UST_H',
+ '#if !defined (TRACE_%s_GENERATED_UST_H) || \\' % group.upper(),
+ ' defined(TRACEPOINT_HEADER_MULTI_READ)',
+ '#define TRACE_%s_GENERATED_UST_H' % group.upper(),
'',
'#include "qemu-common.h"',
'#include <lttng/tracepoint.h>',
@@ -94,7 +95,7 @@ def generate(events, backend):
'',
name=e.name)
- out('#endif /* TRACE__GENERATED_UST_H */',
+ out('#endif /* TRACE_%s_GENERATED_UST_H */' % group.upper(),
'',
'/* This part must be outside ifdef protection */',
'#include <lttng/tracepoint-event.h>')
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 12/20] trace: don't abort qemu if ftrace can't be initialized
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 12/20] trace: don't abort qemu if ftrace can't be initialized Daniel P. Berrange
@ 2016-10-04 20:12 ` Eric Blake
2016-10-05 15:39 ` Stefan Hajnoczi
0 siblings, 1 reply; 33+ messages in thread
From: Eric Blake @ 2016-10-04 20:12 UTC (permalink / raw)
To: Daniel P. Berrange, qemu-devel; +Cc: Lluís Vilanova, Stefan Hajnoczi
[-- Attachment #1: Type: text/plain, Size: 1563 bytes --]
On 10/04/2016 08:35 AM, Daniel P. Berrange wrote:
> If the ftrace backend is compiled into QEMU, any attempt
> to start QEMU while non-root will fail due to the
> inability to open /sys/kernel/debug/tracing/tracing_on.
>
> Add a fallback into the code so that it connects up the
> trace_marker_fd variable to /dev/null when setting
s/setting/getting/ ?
> EACCESS on the 'trace_on' file. This allows QEMU to
s/EACCESS/EACCES/
> run, with ftrace turned into a no-op.
>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> ---
> trace/ftrace.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/trace/ftrace.c b/trace/ftrace.c
> index e953922..3588bb0 100644
> --- a/trace/ftrace.c
> +++ b/trace/ftrace.c
> @@ -51,6 +51,12 @@ bool ftrace_init(void)
> snprintf(path, PATH_MAX, "%s/tracing/tracing_on", debugfs);
Unrelated, but it would be nice to get rid of the PATH_MAX stack
allocation, and instead use g_strdup_printf() or similar in a followup
patch.
> trace_fd = open(path, O_WRONLY);
> if (trace_fd < 0) {
> + if (errno == EACCES) {
> + trace_marker_fd = open("/dev/null", O_WRONLY);
> + if (trace_marker_fd != -1) {
> + return true;
> + }
> + }
> perror("Could not open ftrace 'tracing_on' file");
> return false;
> } else {
>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 604 bytes --]
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 04/20] trace: convert code to use event iterators
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 04/20] trace: convert code to use event iterators Daniel P. Berrange
@ 2016-10-05 9:48 ` Lluís Vilanova
0 siblings, 0 replies; 33+ messages in thread
From: Lluís Vilanova @ 2016-10-05 9:48 UTC (permalink / raw)
To: Daniel P. Berrange; +Cc: qemu-devel, Stefan Hajnoczi
Daniel P Berrange writes:
> This converts the HMP/QMP monitor API implementations
> and some internal trace control methods to use the new
> trace event iterator APIs.
> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
> ---
> monitor.c | 26 +++++++++--------
> trace/control-target.c | 8 +++---
> trace/control.c | 77 +++++++++++++++++++++++++++-----------------------
> trace/qmp.c | 16 +++++++----
> 4 files changed, 69 insertions(+), 58 deletions(-)
> diff --git a/monitor.c b/monitor.c
> index 83c4edf..e3daffe 100644
> --- a/monitor.c
> +++ b/monitor.c
> @@ -3327,13 +3327,14 @@ void info_trace_events_completion(ReadLineState *rs, int nb_args, const char *st
> len = strlen(str);
> readline_set_completion_index(rs, len);
> if (nb_args == 2) {
> - TraceEventID id;
> - for (id = 0; id < trace_event_count(); id++) {
> - const char *event_name = trace_event_get_name(trace_event_id(id));
> - if (!strncmp(str, event_name, len)) {
> - readline_add_completion(rs, event_name);
> - }
> + TraceEventIter iter;
> + TraceEvent *ev;
> + char *pattern = g_strdup_printf("%s*", str);
> + trace_event_iter_init(&iter, pattern);
> + while ((ev = trace_event_iter_next(&iter)) != NULL) {
> + readline_add_completion(rs, trace_event_get_name(ev));
> }
> + g_free(pattern);
> }
> }
> @@ -3344,13 +3345,14 @@ void trace_event_completion(ReadLineState *rs, int nb_args, const char *str)
> len = strlen(str);
> readline_set_completion_index(rs, len);
> if (nb_args == 2) {
> - TraceEventID id;
> - for (id = 0; id < trace_event_count(); id++) {
> - const char *event_name = trace_event_get_name(trace_event_id(id));
> - if (!strncmp(str, event_name, len)) {
> - readline_add_completion(rs, event_name);
> - }
> + TraceEventIter iter;
> + TraceEvent *ev;
> + char *pattern = g_strdup_printf("%s*", str);
> + trace_event_iter_init(&iter, pattern);
> + while ((ev = trace_event_iter_next(&iter)) != NULL) {
> + readline_add_completion(rs, trace_event_get_name(ev));
> }
> + g_free(pattern);
> } else if (nb_args == 3) {
> add_completion_option(rs, str, "on");
> add_completion_option(rs, str, "off");
> diff --git a/trace/control-target.c b/trace/control-target.c
> index 52fcce5..50bac4f 100644
> --- a/trace/control-target.c
> +++ b/trace/control-target.c
> @@ -98,9 +98,10 @@ static bool adding_first_cpu(void)
> void trace_init_vcpu(CPUState *vcpu)
> {
> - TraceEvent *ev = NULL;
> -
> - while ((ev = trace_event_pattern("*", ev)) != NULL) {
> + TraceEventIter iter;
> + TraceEvent *ev;
> + trace_event_iter_init(&iter, NULL);
> + while ((ev = trace_event_iter_next(&iter)) != NULL) {
> if (trace_event_is_vcpu(ev) &&
> trace_event_get_state_static(ev) &&
> trace_event_get_state_dynamic(ev)) {
> @@ -118,6 +119,5 @@ void trace_init_vcpu(CPUState *vcpu)
> }
> }
> }
> -
> trace_guest_cpu_enter(vcpu);
> }
> diff --git a/trace/control.c b/trace/control.c
> index 5a9bb5a..a107cc3 100644
> --- a/trace/control.c
> +++ b/trace/control.c
> @@ -60,9 +60,10 @@ TraceEvent *trace_event_name(const char *name)
> {
> assert(name != NULL);
> - TraceEventID i;
> - for (i = 0; i < trace_event_count(); i++) {
> - TraceEvent *ev = trace_event_id(i);
> + TraceEventIter iter;
> + TraceEvent *ev;
> + trace_event_iter_init(&iter, NULL);
> + while ((ev = trace_event_iter_next(&iter)) != NULL) {
> if (strcmp(trace_event_get_name(ev), name) == 0) {
> return ev;
> }
> @@ -105,21 +106,18 @@ TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev)
> {
> assert(pat != NULL);
> - TraceEventID i;
> -
> - if (ev == NULL) {
> - i = -1;
> - } else {
> - i = trace_event_get_id(ev);
> - }
> - i++;
> -
> - while (i < trace_event_count()) {
> - TraceEvent *res = trace_event_id(i);
> - if (pattern_glob(pat, trace_event_get_name(res))) {
> - return res;
> + bool matched = ev ? false : true;
> + TraceEventIter iter;
> + TraceEvent *thisev;
> + trace_event_iter_init(&iter, pat);
> + while ((thisev = trace_event_iter_next(&iter)) != NULL) {
> + if (matched) {
> + return thisev;
> + } else {
> + if (ev == thisev) {
> + matched = true;
> + }
> }
> - i++;
> }
> return NULL;
> @@ -148,10 +146,11 @@ TraceEvent *trace_event_iter_next(TraceEventIter *iter)
> void trace_list_events(void)
> {
> - int i;
> - for (i = 0; i < trace_event_count(); i++) {
> - TraceEvent *res = trace_event_id(i);
> - fprintf(stderr, "%s\n", trace_event_get_name(res));
> + TraceEventIter iter;
> + TraceEvent *ev;
> + trace_event_iter_init(&iter, NULL);
> + while ((ev = trace_event_iter_next(&iter)) != NULL) {
> + fprintf(stderr, "%s\n", trace_event_get_name(ev));
> }
> }
> @@ -159,26 +158,32 @@ static void do_trace_enable_events(const char *line_buf)
> {
> const bool enable = ('-' != line_buf[0]);
> const char *line_ptr = enable ? line_buf : line_buf + 1;
> + TraceEventIter iter;
> + TraceEvent *ev;
> + bool is_pattern = trace_event_is_pattern(line_ptr);
> - if (trace_event_is_pattern(line_ptr)) {
> - TraceEvent *ev = NULL;
> - while ((ev = trace_event_pattern(line_ptr, ev)) != NULL) {
> - if (trace_event_get_state_static(ev)) {
> - trace_event_set_state_dynamic_init(ev, enable);
> + trace_event_iter_init(&iter, line_ptr);
> + while ((ev = trace_event_iter_next(&iter)) != NULL) {
> + if (!trace_event_get_state_static(ev)) {
> + if (!is_pattern) {
> + error_report("WARNING: trace event '%s' is not traceable",
> + line_ptr);
> + return;
> }
> + continue;
> }
> - } else {
> - TraceEvent *ev = trace_event_name(line_ptr);
> - if (ev == NULL) {
> - error_report("WARNING: trace event '%s' does not exist",
> - line_ptr);
> - } else if (!trace_event_get_state_static(ev)) {
> - error_report("WARNING: trace event '%s' is not traceable",
> - line_ptr);
> - } else {
> - trace_event_set_state_dynamic_init(ev, enable);
> +
> + /* start tracing */
> + trace_event_set_state_dynamic(ev, enable);
> + if (!is_pattern) {
> + return;
> }
> }
> +
> + if (!is_pattern) {
> + error_report("WARNING: trace event '%s' does not exist",
> + line_ptr);
> + }
> }
> void trace_enable_events(const char *line_buf)
> diff --git a/trace/qmp.c b/trace/qmp.c
> index 11d2564..ac777d1 100644
> --- a/trace/qmp.c
> +++ b/trace/qmp.c
> @@ -52,8 +52,10 @@ static bool check_events(bool has_vcpu, bool ignore_unavailable, bool is_pattern
> return true;
> } else {
> /* error for unavailable events */
> - TraceEvent *ev = NULL;
> - while ((ev = trace_event_pattern(name, ev)) != NULL) {
> + TraceEventIter iter;
> + TraceEvent *ev;
> + trace_event_iter_init(&iter, name);
> + while ((ev = trace_event_iter_next(&iter)) != NULL) {
> if (!ignore_unavailable && !trace_event_get_state_static(ev)) {
> error_setg(errp, "event \"%s\" is disabled", trace_event_get_name(ev));
> return false;
> @@ -69,6 +71,7 @@ TraceEventInfoList *qmp_trace_event_get_state(const char *name,
> {
> Error *err = NULL;
> TraceEventInfoList *events = NULL;
> + TraceEventIter iter;
> TraceEvent *ev;
> bool is_pattern = trace_event_is_pattern(name);
> CPUState *cpu;
> @@ -86,8 +89,8 @@ TraceEventInfoList *qmp_trace_event_get_state(const char *name,
> }
> /* Get states (all errors checked above) */
> - ev = NULL;
> - while ((ev = trace_event_pattern(name, ev)) != NULL) {
> + trace_event_iter_init(&iter, name);
> + while ((ev = trace_event_iter_next(&iter)) != NULL) {
> TraceEventInfoList *elem;
> bool is_vcpu = trace_event_is_vcpu(ev);
> if (has_vcpu && !is_vcpu) {
> @@ -132,6 +135,7 @@ void qmp_trace_event_set_state(const char *name, bool enable,
> Error **errp)
> {
> Error *err = NULL;
> + TraceEventIter iter;
> TraceEvent *ev;
> bool is_pattern = trace_event_is_pattern(name);
> CPUState *cpu;
> @@ -150,8 +154,8 @@ void qmp_trace_event_set_state(const char *name, bool enable,
> }
> /* Apply changes (all errors checked above) */
> - ev = NULL;
> - while ((ev = trace_event_pattern(name, ev)) != NULL) {
> + trace_event_iter_init(&iter, name);
> + while ((ev = trace_event_iter_next(&iter)) != NULL) {
> if (!trace_event_get_state_static(ev) ||
> (has_vcpu && !trace_event_is_vcpu(ev))) {
> continue;
> --
> 2.7.4
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 20/20] trace: introduce a formal group name for trace events
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 20/20] trace: introduce a formal group name for trace events Daniel P. Berrange
@ 2016-10-05 9:53 ` Lluís Vilanova
0 siblings, 0 replies; 33+ messages in thread
From: Lluís Vilanova @ 2016-10-05 9:53 UTC (permalink / raw)
To: Daniel P. Berrange; +Cc: qemu-devel, Stefan Hajnoczi
Daniel P Berrange writes:
> The declarations in the generated-tracers.h file are
> assuming there's only ever going to be one instance
> of this header, as they are not namespaced. When we
> have one header per event group, if a single source
> file needs to include multiple sets of trace events,
> the symbols will all clash.
> This change thus introduces a '--group NAME' arg to the
> 'tracetool' program. This will cause all the symbols in
> the generated header files to be given a unique namespace.
> If no group is given, the group name 'common' is used,
> which is suitable for the current usage where there is
> only one global trace-events file used for code generation.
> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
> ---
> scripts/tracetool.py | 15 ++++++++++++++-
> scripts/tracetool/__init__.py | 6 ++++--
> scripts/tracetool/backend/__init__.py | 12 ++++++------
> scripts/tracetool/backend/dtrace.py | 4 ++--
> scripts/tracetool/backend/ftrace.py | 4 ++--
> scripts/tracetool/backend/log.py | 4 ++--
> scripts/tracetool/backend/simple.py | 8 ++++----
> scripts/tracetool/backend/syslog.py | 4 ++--
> scripts/tracetool/backend/ust.py | 4 ++--
> scripts/tracetool/format/__init__.py | 4 ++--
> scripts/tracetool/format/c.py | 18 ++++++++++--------
> scripts/tracetool/format/d.py | 2 +-
> scripts/tracetool/format/h.py | 14 +++++++-------
> scripts/tracetool/format/simpletrace_stap.py | 2 +-
> scripts/tracetool/format/stap.py | 2 +-
> scripts/tracetool/format/tcg_h.py | 8 ++++----
> scripts/tracetool/format/tcg_helper_c.py | 2 +-
> scripts/tracetool/format/tcg_helper_h.py | 2 +-
> scripts/tracetool/format/tcg_helper_wrapper_h.py | 2 +-
> scripts/tracetool/format/ust_events_c.py | 2 +-
> scripts/tracetool/format/ust_events_h.py | 9 +++++----
> 21 files changed, 73 insertions(+), 55 deletions(-)
> diff --git a/scripts/tracetool.py b/scripts/tracetool.py
> index f66e767..629b259 100755
> --- a/scripts/tracetool.py
> +++ b/scripts/tracetool.py
> @@ -15,6 +15,8 @@ __email__ = "stefanha@linux.vnet.ibm.com"
> import sys
> import getopt
> +import os.path
> +import re
> from tracetool import error_write, out
> import tracetool.backend
> @@ -60,6 +62,15 @@ Options:
> else:
> sys.exit(1)
> +def make_group_name(filename):
> + dirname = os.path.realpath(os.path.dirname(filename))
> + basedir = os.path.join(os.path.dirname(__file__), os.pardir)
> + basedir = os.path.realpath(os.path.abspath(basedir))
> + dirname = dirname[len(basedir) + 1:]
> +
> + if dirname == "":
> + return "common"
> + return re.sub(r"/|-", "_", dirname)
> def main(args):
> global _SCRIPT
> @@ -134,8 +145,10 @@ def main(args):
> with open(args[0], "r") as fh:
> events = tracetool.read_events(fh)
> + group = make_group_name(args[0])
> +
> try:
> - tracetool.generate(events, arg_format, arg_backends,
> + tracetool.generate(events, group, arg_format, arg_backends,
> binary=binary, probe_prefix=probe_prefix)
> except tracetool.TracetoolError as e:
> error_opt(str(e))
> diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py
> index ac2cb8f..365446f 100644
> --- a/scripts/tracetool/__init__.py
> +++ b/scripts/tracetool/__init__.py
> @@ -364,7 +364,7 @@ def try_import(mod_name, attr_name=None, attr_default=None):
> return False, None
> -def generate(events, format, backends,
> +def generate(events, group, format, backends,
> binary=None, probe_prefix=None):
> """Generate the output for the given (format, backends) pair.
> @@ -372,6 +372,8 @@ def generate(events, format, backends,
> ----------
> events : list
> list of Event objects to generate for
> + group: str
> + Name of the tracing group
> format : str
> Output format name.
> backends : list
> @@ -401,4 +403,4 @@ def generate(events, format, backends,
> tracetool.backend.dtrace.BINARY = binary
> tracetool.backend.dtrace.PROBEPREFIX = probe_prefix
> - tracetool.format.generate(events, format, backend)
> + tracetool.format.generate(events, format, backend, group)
> diff --git a/scripts/tracetool/backend/__init__.py b/scripts/tracetool/backend/__init__.py
> index d4b6dab..f735a25 100644
> --- a/scripts/tracetool/backend/__init__.py
> +++ b/scripts/tracetool/backend/__init__.py
> @@ -113,11 +113,11 @@ class Wrapper:
> if func is not None:
> func(*args, **kwargs)
> - def generate_begin(self, events):
> - self._run_function("generate_%s_begin", events)
> + def generate_begin(self, events, group):
> + self._run_function("generate_%s_begin", events, group)
> - def generate(self, event):
> - self._run_function("generate_%s", event)
> + def generate(self, event, group):
> + self._run_function("generate_%s", event, group)
> - def generate_end(self, events):
> - self._run_function("generate_%s_end", events)
> + def generate_end(self, events, group):
> + self._run_function("generate_%s_end", events, group)
> diff --git a/scripts/tracetool/backend/dtrace.py b/scripts/tracetool/backend/dtrace.py
> index ab9ecfa..79505c6 100644
> --- a/scripts/tracetool/backend/dtrace.py
> +++ b/scripts/tracetool/backend/dtrace.py
> @@ -35,12 +35,12 @@ def binary():
> return BINARY
> -def generate_h_begin(events):
> +def generate_h_begin(events, group):
> out('#include "trace/generated-tracers-dtrace.h"',
> '')
> -def generate_h(event):
> +def generate_h(event, group):
> out(' QEMU_%(uppername)s(%(argnames)s);',
> uppername=event.name.upper(),
> argnames=", ".join(event.args.names()))
> diff --git a/scripts/tracetool/backend/ftrace.py b/scripts/tracetool/backend/ftrace.py
> index 4b83b44..db9fe7a 100644
> --- a/scripts/tracetool/backend/ftrace.py
> +++ b/scripts/tracetool/backend/ftrace.py
> @@ -19,12 +19,12 @@ from tracetool import out
> PUBLIC = True
> -def generate_h_begin(events):
> +def generate_h_begin(events, group):
> out('#include "trace/ftrace.h"',
> '')
> -def generate_h(event):
> +def generate_h(event, group):
> argnames = ", ".join(event.args.names())
> if len(event.args) > 0:
> argnames = ", " + argnames
> diff --git a/scripts/tracetool/backend/log.py b/scripts/tracetool/backend/log.py
> index 426bb6e..4f4a4d3 100644
> --- a/scripts/tracetool/backend/log.py
> +++ b/scripts/tracetool/backend/log.py
> @@ -19,12 +19,12 @@ from tracetool import out
> PUBLIC = True
> -def generate_h_begin(events):
> +def generate_h_begin(events, group):
> out('#include "qemu/log.h"',
> '')
> -def generate_h(event):
> +def generate_h(event, group):
> argnames = ", ".join(event.args.names())
> if len(event.args) > 0:
> argnames = ", " + argnames
> diff --git a/scripts/tracetool/backend/simple.py b/scripts/tracetool/backend/simple.py
> index 1114e35..9885e83 100644
> --- a/scripts/tracetool/backend/simple.py
> +++ b/scripts/tracetool/backend/simple.py
> @@ -27,7 +27,7 @@ def is_string(arg):
> return False
> -def generate_h_begin(events):
> +def generate_h_begin(events, group):
> for event in events:
> out('void _simple_%(api)s(%(args)s);',
> api=event.api(),
> @@ -35,13 +35,13 @@ def generate_h_begin(events):
> out('')
> -def generate_h(event):
> +def generate_h(event, group):
> out(' _simple_%(api)s(%(args)s);',
> api=event.api(),
> args=", ".join(event.args.names()))
> -def generate_c_begin(events):
> +def generate_c_begin(events, group):
> out('#include "qemu/osdep.h"',
> '#include "trace.h"',
> '#include "trace/control.h"',
> @@ -49,7 +49,7 @@ def generate_c_begin(events):
> '')
> -def generate_c(event):
> +def generate_c(event, group):
> out('void _simple_%(api)s(%(args)s)',
> '{',
> ' TraceBufferRecord rec;',
> diff --git a/scripts/tracetool/backend/syslog.py b/scripts/tracetool/backend/syslog.py
> index 5f693bd..b8ff279 100644
> --- a/scripts/tracetool/backend/syslog.py
> +++ b/scripts/tracetool/backend/syslog.py
> @@ -19,12 +19,12 @@ from tracetool import out
> PUBLIC = True
> -def generate_h_begin(events):
> +def generate_h_begin(events, group):
> out('#include <syslog.h>',
> '')
> -def generate_h(event):
> +def generate_h(event, group):
> argnames = ", ".join(event.args.names())
> if len(event.args) > 0:
> argnames = ", " + argnames
> diff --git a/scripts/tracetool/backend/ust.py b/scripts/tracetool/backend/ust.py
> index ed4c227..4594db6 100644
> --- a/scripts/tracetool/backend/ust.py
> +++ b/scripts/tracetool/backend/ust.py
> @@ -19,13 +19,13 @@ from tracetool import out
> PUBLIC = True
> -def generate_h_begin(events):
> +def generate_h_begin(events, group):
> out('#include <lttng/tracepoint.h>',
> '#include "trace/generated-ust-provider.h"',
> '')
> -def generate_h(event):
> +def generate_h(event, group):
> argnames = ", ".join(event.args.names())
> if len(event.args) > 0:
> argnames = ", " + argnames
> diff --git a/scripts/tracetool/format/__init__.py b/scripts/tracetool/format/__init__.py
> index 812570f..cf6e0e2 100644
> --- a/scripts/tracetool/format/__init__.py
> +++ b/scripts/tracetool/format/__init__.py
> @@ -74,7 +74,7 @@ def exists(name):
> return tracetool.try_import("tracetool.format." + name)[1]
> -def generate(events, format, backend):
> +def generate(events, format, backend, group):
> if not exists(format):
> raise ValueError("unknown format: %s" % format)
> format = format.replace("-", "_")
> @@ -82,4 +82,4 @@ def generate(events, format, backend):
> "generate")[1]
> if func is None:
> raise AttributeError("format has no 'generate': %s" % format)
> - func(events, backend)
> + func(events, backend, group)
> diff --git a/scripts/tracetool/format/c.py b/scripts/tracetool/format/c.py
> index 7ac6d4c..47115ed 100644
> --- a/scripts/tracetool/format/c.py
> +++ b/scripts/tracetool/format/c.py
> @@ -16,7 +16,7 @@ __email__ = "stefanha@linux.vnet.ibm.com"
> from tracetool import out
> -def generate(events, backend):
> +def generate(events, backend, group):
> active_events = [e for e in events
> if "disable" not in e.properties]
> @@ -47,7 +47,8 @@ def generate(events, backend):
> sstate = "TRACE_%s_ENABLED" % e.name.upper(),
> dstate = e.api(e.QEMU_DSTATE))
> - out('TraceEvent *trace_events[] = {')
> + out('TraceEvent *%(group)s_trace_events[] = {',
> + group = group.lower())
> for e in events:
> out(' &%(event)s,', event = e.api(e.QEMU_EVENT))
> @@ -56,13 +57,14 @@ def generate(events, backend):
> '};',
> '')
> - out('static void trace_register_events(void)',
> + out('static void trace_%(group)s_register_events(void)',
> '{',
> - ' trace_event_register_group(trace_events);',
> + ' trace_event_register_group(%(group)s_trace_events);',
> '}',
> - 'trace_init(trace_register_events)')
> + 'trace_init(trace_%(group)s_register_events)',
> + group = group.lower())
> - backend.generate_begin(active_events)
> + backend.generate_begin(active_events, group)
> for event in active_events:
> - backend.generate(event)
> - backend.generate_end(active_events)
> + backend.generate(event, group)
> + backend.generate_end(active_events, group)
> diff --git a/scripts/tracetool/format/d.py b/scripts/tracetool/format/d.py
> index c77d5b7..78397c2 100644
> --- a/scripts/tracetool/format/d.py
> +++ b/scripts/tracetool/format/d.py
> @@ -29,7 +29,7 @@ RESERVED_WORDS = (
> )
> -def generate(events, backend):
> +def generate(events, backend, group):
> events = [e for e in events
> if "disable" not in e.properties]
> diff --git a/scripts/tracetool/format/h.py b/scripts/tracetool/format/h.py
> index f4748c3..3682f4e 100644
> --- a/scripts/tracetool/format/h.py
> +++ b/scripts/tracetool/format/h.py
> @@ -16,11 +16,11 @@ __email__ = "stefanha@linux.vnet.ibm.com"
> from tracetool import out
> -def generate(events, backend):
> +def generate(events, backend, group):
> out('/* This file is autogenerated by tracetool, do not edit. */',
> '',
> - '#ifndef TRACE__GENERATED_TRACERS_H',
> - '#define TRACE__GENERATED_TRACERS_H',
> + '#ifndef TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
> + '#define TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
> '',
> '#include "qemu-common.h"',
> '#include "trace/control.h"',
> @@ -46,7 +46,7 @@ def generate(events, backend):
> enabled=enabled)
> out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
> - backend.generate_begin(events)
> + backend.generate_begin(events, group)
> for e in events:
> if "vcpu" in e.properties:
> @@ -68,11 +68,11 @@ def generate(events, backend):
> cond=cond)
> if "disable" not in e.properties:
> - backend.generate(e)
> + backend.generate(e, group)
> out(' }',
> '}')
> - backend.generate_end(events)
> + backend.generate_end(events, group)
> - out('#endif /* TRACE__GENERATED_TRACERS_H */')
> + out('#endif /* TRACE_%s_GENERATED_TRACERS_H */' % group.upper())
> diff --git a/scripts/tracetool/format/simpletrace_stap.py b/scripts/tracetool/format/simpletrace_stap.py
> index ac3580f..c35e662 100644
> --- a/scripts/tracetool/format/simpletrace_stap.py
> +++ b/scripts/tracetool/format/simpletrace_stap.py
> @@ -19,7 +19,7 @@ from tracetool.backend.simple import is_string
> from tracetool.format.stap import stap_escape
> -def generate(events, backend):
> +def generate(events, backend, group):
> out('/* This file is autogenerated by tracetool, do not edit. */',
> '',
> 'global event_name_to_id_map',
> diff --git a/scripts/tracetool/format/stap.py b/scripts/tracetool/format/stap.py
> index 9e780f1..e8ef3e7 100644
> --- a/scripts/tracetool/format/stap.py
> +++ b/scripts/tracetool/format/stap.py
> @@ -34,7 +34,7 @@ def stap_escape(identifier):
> return identifier
> -def generate(events, backend):
> +def generate(events, backend, group):
> events = [e for e in events
> if "disable" not in e.properties]
> diff --git a/scripts/tracetool/format/tcg_h.py b/scripts/tracetool/format/tcg_h.py
> index e2331f2..5f213f6 100644
> --- a/scripts/tracetool/format/tcg_h.py
> +++ b/scripts/tracetool/format/tcg_h.py
> @@ -27,12 +27,12 @@ def vcpu_transform_args(args):
> ])
> -def generate(events, backend):
> +def generate(events, backend, group):
> out('/* This file is autogenerated by tracetool, do not edit. */',
> '/* You must include this file after the inclusion of helper.h */',
> '',
> - '#ifndef TRACE__GENERATED_TCG_TRACERS_H',
> - '#define TRACE__GENERATED_TCG_TRACERS_H',
> + '#ifndef TRACE_%s_GENERATED_TCG_TRACERS_H' % group.upper(),
> + '#define TRACE_%s_GENERATED_TCG_TRACERS_H' % group.upper(),
> '',
> '#include "trace.h"',
> '#include "exec/helper-proto.h"',
> @@ -63,4 +63,4 @@ def generate(events, backend):
> out('}')
> out('',
> - '#endif /* TRACE__GENERATED_TCG_TRACERS_H */')
> + '#endif /* TRACE_%s_GENERATED_TCG_TRACERS_H */' % group.upper())
> diff --git a/scripts/tracetool/format/tcg_helper_c.py b/scripts/tracetool/format/tcg_helper_c.py
> index e3485b7..cc26e03 100644
> --- a/scripts/tracetool/format/tcg_helper_c.py
> +++ b/scripts/tracetool/format/tcg_helper_c.py
> @@ -40,7 +40,7 @@ def vcpu_transform_args(args, mode):
> assert False
> -def generate(events, backend):
> +def generate(events, backend, group):
> events = [e for e in events
> if "disable" not in e.properties]
> diff --git a/scripts/tracetool/format/tcg_helper_h.py b/scripts/tracetool/format/tcg_helper_h.py
> index dc76c15..6b184b6 100644
> --- a/scripts/tracetool/format/tcg_helper_h.py
> +++ b/scripts/tracetool/format/tcg_helper_h.py
> @@ -18,7 +18,7 @@ from tracetool.transform import *
> import tracetool.vcpu
> -def generate(events, backend):
> +def generate(events, backend, group):
> events = [e for e in events
> if "disable" not in e.properties]
> diff --git a/scripts/tracetool/format/tcg_helper_wrapper_h.py b/scripts/tracetool/format/tcg_helper_wrapper_h.py
> index 020f442..ff53447 100644
> --- a/scripts/tracetool/format/tcg_helper_wrapper_h.py
> +++ b/scripts/tracetool/format/tcg_helper_wrapper_h.py
> @@ -18,7 +18,7 @@ from tracetool.transform import *
> import tracetool.vcpu
> -def generate(events, backend):
> +def generate(events, backend, group):
> events = [e for e in events
> if "disable" not in e.properties]
> diff --git a/scripts/tracetool/format/ust_events_c.py b/scripts/tracetool/format/ust_events_c.py
> index 9967c7a..cd87d8a 100644
> --- a/scripts/tracetool/format/ust_events_c.py
> +++ b/scripts/tracetool/format/ust_events_c.py
> @@ -16,7 +16,7 @@ __email__ = "stefanha@redhat.com"
> from tracetool import out
> -def generate(events, backend):
> +def generate(events, backend, group):
> events = [e for e in events
> if "disabled" not in e.properties]
> diff --git a/scripts/tracetool/format/ust_events_h.py b/scripts/tracetool/format/ust_events_h.py
> index 3e8a7cd..d853155 100644
> --- a/scripts/tracetool/format/ust_events_h.py
> +++ b/scripts/tracetool/format/ust_events_h.py
> @@ -16,7 +16,7 @@ __email__ = "stefanha@redhat.com"
> from tracetool import out
> -def generate(events, backend):
> +def generate(events, backend, group):
> events = [e for e in events
> if "disabled" not in e.properties]
> @@ -28,8 +28,9 @@ def generate(events, backend):
> '#undef TRACEPOINT_INCLUDE_FILE',
> '#define TRACEPOINT_INCLUDE_FILE ./generated-ust-provider.h',
> '',
> - '#if !defined (TRACE__GENERATED_UST_H) || defined(TRACEPOINT_HEADER_MULTI_READ)',
> - '#define TRACE__GENERATED_UST_H',
> + '#if !defined (TRACE_%s_GENERATED_UST_H) || \\' % group.upper(),
> + ' defined(TRACEPOINT_HEADER_MULTI_READ)',
> + '#define TRACE_%s_GENERATED_UST_H' % group.upper(),
> '',
> '#include "qemu-common.h"',
> '#include <lttng/tracepoint.h>',
> @@ -94,7 +95,7 @@ def generate(events, backend):
> '',
> name=e.name)
> - out('#endif /* TRACE__GENERATED_UST_H */',
> + out('#endif /* TRACE_%s_GENERATED_UST_H */' % group.upper(),
> '',
> '/* This part must be outside ifdef protection */',
> '#include <lttng/tracepoint-event.h>')
> --
> 2.7.4
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 11/20] trace: emit name <-> ID mapping in simpletrace header
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 11/20] trace: emit name <-> ID mapping in simpletrace header Daniel P. Berrange
@ 2016-10-05 14:09 ` Stefan Hajnoczi
0 siblings, 0 replies; 33+ messages in thread
From: Stefan Hajnoczi @ 2016-10-05 14:09 UTC (permalink / raw)
To: Daniel P. Berrange; +Cc: qemu-devel, Lluís Vilanova, Stefan Hajnoczi
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On Tue, Oct 04, 2016 at 02:35:50PM +0100, Daniel P. Berrange wrote:
> Currently simpletrace assumes that events are given IDs
> starting from 0, based on the order in which they appear
> in the trace-events file, with no gaps. When the
> trace-events file is split up, this assumption becomes
> problematic.
>
> To deal with this, extend the simpletrace format so that
> it outputs a table of event name <-> ID mappings. That
> will allow QEMU to assign arbitrary IDs to events without
> breaking simpletrace parsing.
>
> The v3 simple trace format was
>
> FILE HEADER
> EVENT TRACE RECORD 0
> EVENT TRACE RECORD 1
> ...
> EVENT TRACE RECORD N
>
> The v4 simple trace format is now
>
> FILE HEADER
> EVENT MAPPING RECORD 0
> EVENT MAPPING RECORD 1
> ...
> EVENT MAPPING RECORD M
> EVENT TRACE RECORD RECORD 0
> EVENT TRACE RECORD RECORD 1
> ...
> EVENT TRACE RECORD N
>
> Although this shows all the mapping records being emitted
> upfront, this is not required by the format. While the main
> simpletrace backend will emit all mappings at startup,
> the systemtap simpletrace.stp script will emit the mappings
> at first use. eg
>
> FILE HEADER
> ...
> EVENT MAPPING RECORD 0
> EVENT TRACE RECORD RECORD 0
> EVENT TRACE RECORD RECORD 1
> EVENT MAPPING RECORD 1
> EVENT TRACE RECORD RECORD 2
> ...
> EVENT TRACE RECORD N
>
> This is more space efficient given that most trace records
> only include a subset of events.
>
> In modifying the systemtap simpletrace code, a 'begin' probe
> was added to emit the trace event header, so you no longer
> need to add '--no-header' when running simpletrace.py for
> systemtap generated trace files.
>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> ---
> scripts/simpletrace.py | 50 ++++++++++++++++++++--------
> scripts/tracetool/format/simpletrace_stap.py | 24 +++++++++++--
> trace/simple.c | 33 ++++++++++++++++--
> 3 files changed, 89 insertions(+), 18 deletions(-)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (19 preceding siblings ...)
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 20/20] trace: introduce a formal group name for trace events Daniel P. Berrange
@ 2016-10-05 15:31 ` Stefan Hajnoczi
2016-10-06 8:21 ` Daniel P. Berrange
2016-10-06 9:12 ` Daniel P. Berrange
2016-10-05 15:32 ` Stefan Hajnoczi
2016-10-07 13:51 ` [Qemu-devel] [PATCH v6 21/20] linux-user/bsd-user: initialize trace events subsystem Daniel P. Berrange
22 siblings, 2 replies; 33+ messages in thread
From: Stefan Hajnoczi @ 2016-10-05 15:31 UTC (permalink / raw)
To: Daniel P. Berrange; +Cc: qemu-devel, Lluís Vilanova
[-- Attachment #1: Type: text/plain, Size: 3010 bytes --]
Hmm...the SystemTap simpletrace script does not work anymore for me. But I've
tested qemu.git/master and get the same results.
Did you test it successfully somehow?
$ cat x86_64-softmmu/qemu-system-x86_64.stp \
x86_64-softmmu/qemu-system-x86_64-simpletrace.stp >test.stp
$ echo 'probe qemu.system.x86_64.simpletrace.* {}' >>test.stp
$ sudo stap test.stp -c 'x86_64-softmmu/qemu-system-x86_64 -enable-kvm' >/tmp/trace.dat
$ scripts/simpletrace.py trace-events-all /tmp/trace.dat
Traceback (most recent call last):
File "scripts/simpletrace.py", line 217, in <module>
run(Formatter())
File "scripts/simpletrace.py", line 192, in run
process(events, sys.argv[2], analyzer, read_header=read_header)
File "scripts/simpletrace.py", line 167, in process
for rec in read_trace_records(edict, log):
File "scripts/simpletrace.py", line 103, in read_trace_records
rec = read_record(edict, idtoname, fobj)
File "scripts/simpletrace.py", line 71, in read_record
return get_record(edict, idtoname, rechdr, fobj)
File "scripts/simpletrace.py", line 43, in get_record
name = idtoname[event_id]
KeyError: 1475680158726993795
$ scripts/simpletrace.py --no-header trace-events-all /tmp/trace.dat
Traceback (most recent call last):
File "scripts/simpletrace.py", line 217, in <module>
run(Formatter())
File "scripts/simpletrace.py", line 192, in run
process(events, sys.argv[2], analyzer, read_header=read_header)
File "scripts/simpletrace.py", line 167, in process
for rec in read_trace_records(edict, log):
File "scripts/simpletrace.py", line 103, in read_trace_records
rec = read_record(edict, idtoname, fobj)
File "scripts/simpletrace.py", line 71, in read_record
return get_record(edict, idtoname, rechdr, fobj)
File "scripts/simpletrace.py", line 43, in get_record
name = idtoname[event_id]
KeyError: 17487890541996943796L
$ xxd -l 256 /tmp/trace.dat
00000000: ffff ffff ffff ffff b429 a40a cb77 b1f2 .........)...w..
00000010: 0400 0000 0000 0000 3005 0000 0000 0000 ........0.......
00000020: 83b7 032f 49ab 7a14 5b00 0000 e674 0000 .../I.z.[....t..
00000030: 0600 0000 6465 7669 6365 0600 0000 6465 ....device....de
00000040: 7669 6365 0e00 0000 6877 2f63 6f72 652f vice....hw/core/
00000050: 7164 6576 2e63 6504 0000 0000 0000 1100 qdev.ce.........
00000060: 0000 6465 7669 6365 5f63 6c61 7373 5f69 ..device_class_i
00000070: 6e69 7400 0000 0000 0000 0000 0000 0000 nit.............
00000080: 0000 0020 0000 006f 626a 6563 745f 636c ... ...object_cl
00000090: 6173 735f 6479 6e61 6d69 635f 6361 7374 ass_dynamic_cast
000000a0: 5f61 7373 6572 7401 0000 0000 0000 0000 _assert.........
000000b0: 0000 0000 0000 00a7 ca03 2f49 ab7a 145b ........../I.z.[
000000c0: 0000 00e6 7400 0006 0000 0064 6576 6963 ....t......devic
000000d0: 6506 0000 0064 6576 6963 650e 0000 0068 e....device....h
000000e0: 772f 636f 7265 2f71 6465 762e 6365 0400 w/core/qdev.ce..
000000f0: 0000 0000 0011 0000 0064 6576 6963 655f .........device_
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^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (20 preceding siblings ...)
2016-10-05 15:31 ` [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Stefan Hajnoczi
@ 2016-10-05 15:32 ` Stefan Hajnoczi
2016-10-07 13:51 ` [Qemu-devel] [PATCH v6 21/20] linux-user/bsd-user: initialize trace events subsystem Daniel P. Berrange
22 siblings, 0 replies; 33+ messages in thread
From: Stefan Hajnoczi @ 2016-10-05 15:32 UTC (permalink / raw)
To: Daniel P. Berrange; +Cc: qemu-devel, Lluís Vilanova
[-- Attachment #1: Type: text/plain, Size: 9583 bytes --]
On Tue, Oct 04, 2016 at 02:35:39PM +0100, Daniel P. Berrange wrote:
> These patches were previously posted as part of my giant
> trace events modular build series
>
> v1: https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01714.html
> v2: https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03335.html
> v3: https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg04282.html
> v4: https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05467.html
> v5: https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg07435.html
>
> This series does all the refactoring required to support a fully
> modular build of the trace probe points, but does not actually
> convert anything to use it. The 40+ patches to convert each subdir
> to use modular build will only be posted again, once the refactoring
> is reviewed & queued, in order to avoid patch-bombing the list
> more than is needed. The full series is visible at
>
> https://github.com/berrange/qemu/tree/trace-events-6
>
> The key problem being tackled by this series is the assumption
> that there is a single statically declared enum which provides
> globally unique event IDs. Inside QEMU the event IDs were used
> as list indexes into the 'trace_events' array, while the event
> VCPU IDs were used as bitmap indexes in trace_dstate against
> the CPUState struct. Externally to QEMU, the event IDs were
> also written in the simpletrace binary data format and used
> to lookup the entry in the trace-events file afterwards.
>
> Inside QEMU the refactoring work managed to remove all need
> for event IDs for purposes of 'trace_events' array lookups.
> Instead we now have global variables per-event which can be
> referenced directly.
>
> When QEMU starts up and the various event groups are registered,
> we now dynamically assign event IDs and VCPU IDs to each event.
> This removes the limitation in the v1 posting that all vCPU
> events had to be in one file. We also removed the limitation
> on the total number of vCPU events. So there is no regression
> in functionality of VCPU event support compared to current
> GIT master.
> Since the event IDs are allocated dynamically at runtime,
> the simpletrace.py script cannot assume they map directly
> to the 'trace-events' file entries. Thus, the simpletrace
> binary format is extended to include a record type that
> maps trace event IDs to trace event names. While it would
> be possible to take this even further and make the
> simpletrace binary format 100% self-describing this is left
> as an exercise for future developers, as it is not a
> pre-requisite for this modular build.
>
> While some of the intermediate patches may seem pointless
> on their own, they exist in order to facilitate the review
> of later patches by ensuring each patch does the minimum
> possible refactoring work.
>
> Changed in v6:
>
> - Fix mixed up break vs return in event match (Lluís)
> - Fixed indentation of generated code (Lluís)
> - Unpack tuple return value (Stefan)
> - Misc typos / docs formatting (Stefan / Lluís)
>
>
> Changed in v5:
>
> - Use single '_' instead of double/triple '_' in
> constants (Lluís)
> - Use more pythonic loop iterator (Lluís)
> - Misc typos (Lluís/Stefan)
> - Fix filtering of QMP trace events (Lluís)
> - Fix some new mistakes in trace-events in master
>
> Changed in v4:
>
> - Misc typos / indentation (Lluís, Eric)
> - Simplify do_trace_enable_events (Lluís)
> - Use Event.api() in more places (Lluís)
> - Actually delete events_{h,c}.py (Lluís)
> - Use bitmap_new() for allocation (Lluís)
> - Dont use .git to make relative path (Lluís)
>
> Changed in v3:
>
> - Change simpletrace format to write a mapping of
> IDs to names
> - Declare a TraceEvent variable per event, instead
> of just an array
> - Make 'trace_events' array be 'TraceEvent **'
> instead of 'TraceEvent *'
> - Fix infinite loop in iterators due to bad
> fix in v2 posting.
> - Dynamically allocate the trace_dstate variable
> in CPUState based on actual number of vcpu events
> registered at runtime
> - Push logic for determining group name into the
> tracetool program
> - Fix to ftrace to make it more practical for users
> who sometimes run QEMU as non-root.
> - Get rid of TraceEventID/VCPUID enums entirely
>
> Changed in v2:
>
> - Fixed filtering of events on first call of
> iterator_next (Stefan)
> - Switch from size_t to uint32_t for event ID
> type (Paolo/Stefan)
> - Replace global 'dstate' array with individual
> variables (Lluís)
>
> Daniel P. Berrange (20):
> trace: move colo trace events to net/ sub-directory
> trace: remove double-underscore in event name
> trace: add trace event iterator APIs
> trace: convert code to use event iterators
> trace: remove some now unused functions
> trace: remove global 'uint16 dstate[]' array
> trace: remove duplicate control.h includes in generated-tracers.h
> trace: break circular dependency in event-internal.h
> trace: give each trace event a named TraceEvent struct
> trace: remove the TraceEventID and TraceEventVCPUID enums
> trace: emit name <-> ID mapping in simpletrace header
> trace: don't abort qemu if ftrace can't be initialized
> trace: provide mechanism for registering trace events
> trace: dynamically allocate trace_dstate in CPUState
> trace: dynamically allocate event IDs at runtime
> trace: get rid of generated-events.h/generated-events.c
> trace: rename _read_events to read_events
> trace: push reading of events up a level to tracetool main
> trace: pass trace-events to tracetool as a positional param
> trace: introduce a formal group name for trace events
>
> Makefile | 3 -
> Makefile.target | 6 +-
> hw/scsi/spapr_vscsi.c | 2 +-
> hw/scsi/trace-events | 2 +-
> include/qemu/module.h | 2 +
> include/qom/cpu.h | 9 +-
> include/trace-tcg.h | 1 -
> include/trace.h | 1 -
> monitor.c | 26 ++---
> net/trace-events | 16 +++
> qemu-img.c | 1 +
> qemu-io.c | 1 +
> qemu-nbd.c | 1 +
> qom/cpu.c | 7 +-
> scripts/simpletrace.py | 56 +++++++----
> scripts/tracetool.py | 20 +++-
> scripts/tracetool/__init__.py | 28 ++++--
> scripts/tracetool/backend/__init__.py | 12 +--
> scripts/tracetool/backend/dtrace.py | 4 +-
> scripts/tracetool/backend/ftrace.py | 5 +-
> scripts/tracetool/backend/log.py | 7 +-
> scripts/tracetool/backend/simple.py | 12 +--
> scripts/tracetool/backend/syslog.py | 5 +-
> scripts/tracetool/backend/ust.py | 4 +-
> scripts/tracetool/format/__init__.py | 4 +-
> scripts/tracetool/format/c.py | 56 +++++++++--
> scripts/tracetool/format/d.py | 2 +-
> scripts/tracetool/format/events_c.py | 44 --------
> scripts/tracetool/format/events_h.py | 60 -----------
> scripts/tracetool/format/h.py | 37 +++++--
> scripts/tracetool/format/simpletrace_stap.py | 26 ++++-
> scripts/tracetool/format/stap.py | 2 +-
> scripts/tracetool/format/tcg_h.py | 8 +-
> scripts/tracetool/format/tcg_helper_c.py | 2 +-
> scripts/tracetool/format/tcg_helper_h.py | 2 +-
> scripts/tracetool/format/tcg_helper_wrapper_h.py | 2 +-
> scripts/tracetool/format/ust_events_c.py | 2 +-
> scripts/tracetool/format/ust_events_h.py | 9 +-
> stubs/trace-control.c | 9 +-
> trace-events | 16 ---
> trace/Makefile.objs | 46 +++------
> trace/control-internal.h | 48 ++++-----
> trace/control-target.c | 35 +++----
> trace/control.c | 123 +++++++++++++++--------
> trace/control.h | 112 +++++++--------------
> trace/event-internal.h | 18 +++-
> trace/ftrace.c | 6 ++
> trace/qmp.c | 16 +--
> trace/simple.c | 41 ++++++--
> trace/simple.h | 6 +-
> vl.c | 2 +
> 51 files changed, 502 insertions(+), 463 deletions(-)
> delete mode 100644 scripts/tracetool/format/events_c.py
> delete mode 100644 scripts/tracetool/format/events_h.py
The SystemTap simpletrace breakage I mentioned isn't introduced by this
series (I think?). I've applied it for now and will include it in the
next pull request unless issues are discovered.
Thanks, applied to my master tree:
https://github.com/stefanha/qemu/commits/tracing
Stefan
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^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 12/20] trace: don't abort qemu if ftrace can't be initialized
2016-10-04 20:12 ` Eric Blake
@ 2016-10-05 15:39 ` Stefan Hajnoczi
0 siblings, 0 replies; 33+ messages in thread
From: Stefan Hajnoczi @ 2016-10-05 15:39 UTC (permalink / raw)
To: Eric Blake; +Cc: Daniel P. Berrange, qemu-devel, Lluís Vilanova
[-- Attachment #1: Type: text/plain, Size: 592 bytes --]
On Tue, Oct 04, 2016 at 03:12:31PM -0500, Eric Blake wrote:
> On 10/04/2016 08:35 AM, Daniel P. Berrange wrote:
> > If the ftrace backend is compiled into QEMU, any attempt
> > to start QEMU while non-root will fail due to the
> > inability to open /sys/kernel/debug/tracing/tracing_on.
> >
> > Add a fallback into the code so that it connects up the
> > trace_marker_fd variable to /dev/null when setting
>
> s/setting/getting/ ?
>
> > EACCESS on the 'trace_on' file. This allows QEMU to
>
> s/EACCESS/EACCES/
Thanks, I've applied these changes while merging.
Stefan
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^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build
2016-10-05 15:31 ` [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Stefan Hajnoczi
@ 2016-10-06 8:21 ` Daniel P. Berrange
2016-10-06 9:12 ` Daniel P. Berrange
1 sibling, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-06 8:21 UTC (permalink / raw)
To: Stefan Hajnoczi; +Cc: qemu-devel, Lluís Vilanova
On Wed, Oct 05, 2016 at 04:31:27PM +0100, Stefan Hajnoczi wrote:
> Hmm...the SystemTap simpletrace script does not work anymore for me. But I've
> tested qemu.git/master and get the same results.
>
> Did you test it successfully somehow?
Yes, I had tested this, but lemme go back and test again - perhaps
something else changed in the meantime.
Regards,
Daniel
--
|: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org -o- http://virt-manager.org :|
|: http://entangle-photo.org -o- http://search.cpan.org/~danberr/ :|
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build
2016-10-05 15:31 ` [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Stefan Hajnoczi
2016-10-06 8:21 ` Daniel P. Berrange
@ 2016-10-06 9:12 ` Daniel P. Berrange
1 sibling, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-06 9:12 UTC (permalink / raw)
To: Stefan Hajnoczi; +Cc: qemu-devel, Lluís Vilanova
On Wed, Oct 05, 2016 at 04:31:27PM +0100, Stefan Hajnoczi wrote:
> Hmm...the SystemTap simpletrace script does not work anymore for me. But I've
> tested qemu.git/master and get the same results.
>
> Did you test it successfully somehow?
>
> $ cat x86_64-softmmu/qemu-system-x86_64.stp \
> x86_64-softmmu/qemu-system-x86_64-simpletrace.stp >test.stp
> $ echo 'probe qemu.system.x86_64.simpletrace.* {}' >>test.stp
>
> $ sudo stap test.stp -c 'x86_64-softmmu/qemu-system-x86_64 -enable-kvm' >/tmp/trace.dat
Do you have pre-existing files for QEMU simpletrace in
/usr/share/systemtap/tapset when you ran this ? If so
this is what is causing you trouble.
Systemtap will match on name, and will thus find multiple
copies of the QME probes - one set in your test.stp and
the other set in /usr/share/systemtap/tapset/qemu-system-x86_64-simpletrace.stp
and activate both of them.
Since my series changed the data format, this will cause problems
as you'll get probes writing new & old formats in the same file
>
> $ scripts/simpletrace.py trace-events-all /tmp/trace.dat
> Traceback (most recent call last):
> File "scripts/simpletrace.py", line 217, in <module>
> run(Formatter())
> File "scripts/simpletrace.py", line 192, in run
> process(events, sys.argv[2], analyzer, read_header=read_header)
> File "scripts/simpletrace.py", line 167, in process
> for rec in read_trace_records(edict, log):
> File "scripts/simpletrace.py", line 103, in read_trace_records
> rec = read_record(edict, idtoname, fobj)
> File "scripts/simpletrace.py", line 71, in read_record
> return get_record(edict, idtoname, rechdr, fobj)
> File "scripts/simpletrace.py", line 43, in get_record
> name = idtoname[event_id]
> KeyError: 1475680158726993795
>
> $ scripts/simpletrace.py --no-header trace-events-all /tmp/trace.dat
> Traceback (most recent call last):
> File "scripts/simpletrace.py", line 217, in <module>
> run(Formatter())
> File "scripts/simpletrace.py", line 192, in run
> process(events, sys.argv[2], analyzer, read_header=read_header)
> File "scripts/simpletrace.py", line 167, in process
> for rec in read_trace_records(edict, log):
> File "scripts/simpletrace.py", line 103, in read_trace_records
> rec = read_record(edict, idtoname, fobj)
> File "scripts/simpletrace.py", line 71, in read_record
> return get_record(edict, idtoname, rechdr, fobj)
> File "scripts/simpletrace.py", line 43, in get_record
> name = idtoname[event_id]
> KeyError: 17487890541996943796L
Regards,
Daniel
--
|: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org -o- http://virt-manager.org :|
|: http://entangle-photo.org -o- http://search.cpan.org/~danberr/ :|
^ permalink raw reply [flat|nested] 33+ messages in thread
* [Qemu-devel] [PATCH v6 21/20] linux-user/bsd-user: initialize trace events subsystem
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
` (21 preceding siblings ...)
2016-10-05 15:32 ` Stefan Hajnoczi
@ 2016-10-07 13:51 ` Daniel P. Berrange
2016-10-07 14:14 ` Daniel P. Berrange
2016-10-12 7:50 ` Stefan Hajnoczi
22 siblings, 2 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-07 13:51 UTC (permalink / raw)
To: qemu-devel
The bsd-user/linux-user programs make use of the CPU emulation
code and this now requires that the trace events subsystem
is enabled, otherwise it'll crash trying to allocate an empty
trace events bitmap for the CPU object.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
Stefan, technically this patch ought to be squashed into:
[PATCH v6 13/20] trace: provide mechanism for registering trace events
bsd-user/main.c | 1 +
linux-user/main.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/bsd-user/main.c b/bsd-user/main.c
index d803d3e..90d5bbd 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -730,6 +730,7 @@ int main(int argc, char **argv)
if (argc <= 1)
usage();
+ module_call_init(MODULE_INIT_TRACE);
qemu_init_cpu_list();
module_call_init(MODULE_INIT_QOM);
diff --git a/linux-user/main.c b/linux-user/main.c
index 9e4b430..0e31dad 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -4158,6 +4158,7 @@ int main(int argc, char **argv, char **envp)
int ret;
int execfd;
+ module_call_init(MODULE_INIT_TRACE);
qemu_init_cpu_list();
module_call_init(MODULE_INIT_QOM);
--
2.7.4
^ permalink raw reply related [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 21/20] linux-user/bsd-user: initialize trace events subsystem
2016-10-07 13:51 ` [Qemu-devel] [PATCH v6 21/20] linux-user/bsd-user: initialize trace events subsystem Daniel P. Berrange
@ 2016-10-07 14:14 ` Daniel P. Berrange
2016-10-12 7:50 ` Stefan Hajnoczi
1 sibling, 0 replies; 33+ messages in thread
From: Daniel P. Berrange @ 2016-10-07 14:14 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi
Just Cc'ing Stefan this time
On Fri, Oct 07, 2016 at 02:51:17PM +0100, Daniel P. Berrange wrote:
> The bsd-user/linux-user programs make use of the CPU emulation
> code and this now requires that the trace events subsystem
> is enabled, otherwise it'll crash trying to allocate an empty
> trace events bitmap for the CPU object.
>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> ---
>
> Stefan, technically this patch ought to be squashed into:
>
> [PATCH v6 13/20] trace: provide mechanism for registering trace events
>
> bsd-user/main.c | 1 +
> linux-user/main.c | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/bsd-user/main.c b/bsd-user/main.c
> index d803d3e..90d5bbd 100644
> --- a/bsd-user/main.c
> +++ b/bsd-user/main.c
> @@ -730,6 +730,7 @@ int main(int argc, char **argv)
> if (argc <= 1)
> usage();
>
> + module_call_init(MODULE_INIT_TRACE);
> qemu_init_cpu_list();
> module_call_init(MODULE_INIT_QOM);
>
> diff --git a/linux-user/main.c b/linux-user/main.c
> index 9e4b430..0e31dad 100644
> --- a/linux-user/main.c
> +++ b/linux-user/main.c
> @@ -4158,6 +4158,7 @@ int main(int argc, char **argv, char **envp)
> int ret;
> int execfd;
>
> + module_call_init(MODULE_INIT_TRACE);
> qemu_init_cpu_list();
> module_call_init(MODULE_INIT_QOM);
>
> --
> 2.7.4
>
Regards,
Daniel
--
|: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org -o- http://virt-manager.org :|
|: http://entangle-photo.org -o- http://search.cpan.org/~danberr/ :|
^ permalink raw reply [flat|nested] 33+ messages in thread
* Re: [Qemu-devel] [PATCH v6 21/20] linux-user/bsd-user: initialize trace events subsystem
2016-10-07 13:51 ` [Qemu-devel] [PATCH v6 21/20] linux-user/bsd-user: initialize trace events subsystem Daniel P. Berrange
2016-10-07 14:14 ` Daniel P. Berrange
@ 2016-10-12 7:50 ` Stefan Hajnoczi
1 sibling, 0 replies; 33+ messages in thread
From: Stefan Hajnoczi @ 2016-10-12 7:50 UTC (permalink / raw)
To: Daniel P. Berrange; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 718 bytes --]
On Fri, Oct 07, 2016 at 02:51:17PM +0100, Daniel P. Berrange wrote:
> The bsd-user/linux-user programs make use of the CPU emulation
> code and this now requires that the trace events subsystem
> is enabled, otherwise it'll crash trying to allocate an empty
> trace events bitmap for the CPU object.
>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> ---
>
> Stefan, technically this patch ought to be squashed into:
>
> [PATCH v6 13/20] trace: provide mechanism for registering trace events
>
> bsd-user/main.c | 1 +
> linux-user/main.c | 1 +
> 2 files changed, 2 insertions(+)
Thanks, squashed to my tracing tree:
https://github.com/stefanha/qemu/commits/tracing
Stefan
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^ permalink raw reply [flat|nested] 33+ messages in thread
end of thread, other threads:[~2016-10-12 7:51 UTC | newest]
Thread overview: 33+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-10-04 13:35 [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 01/20] trace: move colo trace events to net/ sub-directory Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 02/20] trace: remove double-underscore in event name Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 03/20] trace: add trace event iterator APIs Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 04/20] trace: convert code to use event iterators Daniel P. Berrange
2016-10-05 9:48 ` Lluís Vilanova
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 05/20] trace: remove some now unused functions Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 06/20] trace: remove global 'uint16 dstate[]' array Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 07/20] trace: remove duplicate control.h includes in generated-tracers.h Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 08/20] trace: break circular dependency in event-internal.h Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 09/20] trace: give each trace event a named TraceEvent struct Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 10/20] trace: remove the TraceEventID and TraceEventVCPUID enums Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 11/20] trace: emit name <-> ID mapping in simpletrace header Daniel P. Berrange
2016-10-05 14:09 ` Stefan Hajnoczi
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 12/20] trace: don't abort qemu if ftrace can't be initialized Daniel P. Berrange
2016-10-04 20:12 ` Eric Blake
2016-10-05 15:39 ` Stefan Hajnoczi
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 13/20] trace: provide mechanism for registering trace events Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 14/20] trace: dynamically allocate trace_dstate in CPUState Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 15/20] trace: dynamically allocate event IDs at runtime Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 16/20] trace: get rid of generated-events.h/generated-events.c Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 17/20] trace: rename _read_events to read_events Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 18/20] trace: push reading of events up a level to tracetool main Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 19/20] trace: pass trace-events to tracetool as a positional param Daniel P. Berrange
2016-10-04 13:35 ` [Qemu-devel] [PATCH v6 20/20] trace: introduce a formal group name for trace events Daniel P. Berrange
2016-10-05 9:53 ` Lluís Vilanova
2016-10-05 15:31 ` [Qemu-devel] [PATCH v6 00/20] Refactor trace to allow modular build Stefan Hajnoczi
2016-10-06 8:21 ` Daniel P. Berrange
2016-10-06 9:12 ` Daniel P. Berrange
2016-10-05 15:32 ` Stefan Hajnoczi
2016-10-07 13:51 ` [Qemu-devel] [PATCH v6 21/20] linux-user/bsd-user: initialize trace events subsystem Daniel P. Berrange
2016-10-07 14:14 ` Daniel P. Berrange
2016-10-12 7:50 ` Stefan Hajnoczi
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