perf/x86/intel/pebs: Fix PEBS timestamps overwritten

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The PEBS TSC-based timestamps do not appear correctly in the final
perf.data output file from perf record.

The data->time field setup by PEBS in the setup_pebs_fixed_sample_data()
is later overwritten by perf_events generic code in
perf_prepare_sample(). There is an ordering problem.

Set the sample flags when the data->time is updated by PEBS.
The data->time field will not be overwritten anymore.

Reported-by: Andreas Kogler <andreas.kogler.0x@gmail.com>
Reported-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220901130959.1285717-3-kan.liang@linux.intel.com

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Kan Liang 2022-09-01 06:09:55 -07:00 • committed by Peter Zijlstra

parent 3aac580d5c

commit 47a3aeb39e

1 changed files with 6 additions and 2 deletions

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arch/x86/events/intel/ds.c

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