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perf evsel: Add support for synthesized branch stack sample type 

Allow for a synthesized branch stack to be added to samples. As with
synthesized call chains, the sample type cannot be changed because it is
needed to continue to parse events. So add and use helper function
evsel__has_br_stack() to indicate a branch stack, whether original or
synthesized.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200429150751.12570-6-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2020-04-29 18:07:47 +03:00 committed by Arnaldo Carvalho de Melo
parent ec90e42ce5
commit 6cd2cbfc68
2 changed files with 11 additions and 1 deletions
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10
tools/perf/util/evsel.h
View File

@ -417,6 +417,16 @@ static inline bool evsel__has_callchain(const struct evsel *evsel)
evsel->synth_sample_type & PERF_SAMPLE_CALLCHAIN;
}
static inline bool evsel__has_br_stack(const struct evsel *evsel)
{
/*
* For reporting purposes, an evsel sample can have a recorded branch
* stack or a branch stack synthesized from AUX area data.
*/
return evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK ||
evsel->synth_sample_type & PERF_SAMPLE_BRANCH_STACK;
}
struct perf_env *perf_evsel__env(struct evsel *evsel);
int perf_evsel__store_ids(struct evsel *evsel, struct evlist *evlist);

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

@ -1243,7 +1243,7 @@ static void dump_sample(struct evsel *evsel, union perf_event *event,
if (evsel__has_callchain(evsel))
callchain__printf(evsel, sample);
if (sample_type & PERF_SAMPLE_BRANCH_STACK)
if (evsel__has_br_stack(evsel))
branch_stack__printf(sample, perf_evsel__has_branch_callstack(evsel));
if (sample_type & PERF_SAMPLE_REGS_USER)