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perf record: Select comm_exec flag if supported

Browse source 
The comm_exec flag on the attribute can later be found in the perf.data
file allowing a tool to know in advance if the captured data has the
flag.

Signed-off-by: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Adrian Hunter 2014-07-14 13:02:28 +03:00 • committed by Arnaldo Carvalho de Melo
commit 39e09d40be
1 changed files with 17 additions and 1 deletions
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18
tools/perf/util/record.c
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@ -69,15 +69,26 @@ static void perf_probe_sample_identifier(struct perf_evsel *evsel)
evsel->attr.sample_type |= PERF_SAMPLE_IDENTIFIER;
}
static void perf_probe_comm_exec(struct perf_evsel *evsel)
{
evsel->attr.comm_exec = 1;
}
bool perf_can_sample_identifier(void)
{
return perf_probe_api(perf_probe_sample_identifier);
}
static bool perf_can_comm_exec(void)
{
return perf_probe_api(perf_probe_comm_exec);
}
void perf_evlist__config(struct perf_evlist *evlist, struct record_opts *opts)
{
struct perf_evsel *evsel;
bool use_sample_identifier = false;
bool use_comm_exec;
/*
* Set the evsel leader links before we configure attributes,
@ -89,8 +100,13 @@ void perf_evlist__config(struct perf_evlist *evlist, struct record_opts *opts)
if (evlist->cpus->map[0] < 0)
opts->no_inherit = true;
evlist__for_each(evlist, evsel)
use_comm_exec = perf_can_comm_exec();
evlist__for_each(evlist, evsel) {
perf_evsel__config(evsel, opts);
if (!evsel->idx && use_comm_exec)
evsel->attr.comm_exec = 1;
}
if (evlist->nr_entries > 1) {
struct perf_evsel *first = perf_evlist__first(evlist);