diff options
| author |   Namhyung Kim <namhyung@kernel.org> | 2022-09-08 14:41:02 -0700 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2022-09-13 15:03:22 +0200 |
| commit | 3749d33e510c3dc695b3a5886b706310890d7ebd (patch) | |
| tree | 38264855d5b66b021dc61ae373b61daebd665e17 /arch/x86/events/intel | |
| parent | perf/x86/intel: Optimize FIXED_CTR_CTRL access (diff) | |
| download | linux-dev-3749d33e510c3dc695b3a5886b706310890d7ebd.tar.xz linux-dev-3749d33e510c3dc695b3a5886b706310890d7ebd.zip | |
perf: Use sample_flags for callchain
So that it can call perf_callchain() only if needed. Historically it used
__PERF_SAMPLE_CALLCHAIN_EARLY but we can do that with sample_flags in the
struct perf_sample_data.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220908214104.3851807-1-namhyung@kernel.org
Diffstat (limited to 'arch/x86/events/intel')
| -rw-r--r-- | arch/x86/events/intel/ds.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index a5275c235c2a..4ba6ab6d0d92 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -1546,8 +1546,10 @@ static void setup_pebs_fixed_sample_data(struct perf_event *event, * previous PMI context or an (I)RET happened between the record and * PMI. */ - if (sample_type & PERF_SAMPLE_CALLCHAIN) + if (sample_type & PERF_SAMPLE_CALLCHAIN) { data->callchain = perf_callchain(event, iregs); + data->sample_flags |= PERF_SAMPLE_CALLCHAIN; + } /* * We use the interrupt regs as a base because the PEBS record does not @@ -1719,8 +1721,10 @@ static void setup_pebs_adaptive_sample_data(struct perf_event *event, * previous PMI context or an (I)RET happened between the record and * PMI. */ - if (sample_type & PERF_SAMPLE_CALLCHAIN) + if (sample_type & PERF_SAMPLE_CALLCHAIN) { data->callchain = perf_callchain(event, iregs); + data->sample_flags |= PERF_SAMPLE_CALLCHAIN; + } *regs = *iregs; /* The ip in basic is EventingIP */ |