forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

perf tools: Add time argument on COMM setting

Browse source 
This way we can later delimit a lifecycle for the COMM and map a hist to
a precise COMM:timeslice couple.

PERF_RECORD_COMM and PERF_RECORD_FORK events that don't have
PERF_SAMPLE_TIME samples can only send 0 value as a timestamp and thus
should overwrite any previous COMM on a given thread because there is no
sensible way to keep track of all the comms lifecycles in a thread
without time informations.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tested-by: Jiri Olsa <jolsa@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-6tyow99vgmmtt9qwr2u2lqd7@git.kernel.org
[ Made it cope with PERF_RECORD_MMAP2 ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Frederic Weisbecker 2013-09-11 16:18:24 +02:00 • committed by Arnaldo Carvalho de Melo
parent b9c5143a01
commit 162f0befda
10 changed files with 67 additions and 53 deletions
Download patch file Download diff file Expand all files Collapse all files

2
tools/perf/util/session.c
View file

@ -1100,7 +1100,7 @@ static struct thread *perf_session__register_idle_thread(struct perf_session *se
{
struct thread *thread = perf_session__findnew(self, 0);
if (thread == NULL || thread__set_comm(thread, "swapper")) {
if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
pr_err("problem inserting idle task.\n");
thread = NULL;
}