perf: Use sample_flags for branch stack

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Use the new sample_flags to indicate whether the branch stack is filled
by the PMU driver.

Remove the br_stack from the perf_sample_data_init() to minimize the number
of cache lines touched.

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/20220901130959.1285717-4-kan.liang@linux.intel.com

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Kan Liang 2022-09-01 06:09:56 -07:00 • committed by Peter Zijlstra

parent 47a3aeb39e

commit a9a931e266

7 changed files with 18 additions and 8 deletions

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arch/powerpc/perf/core-book3s.c

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arch/x86/events/amd/core.c

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arch/x86/events/core.c

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arch/x86/events/intel/core.c

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arch/x86/events/intel/ds.c

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include/linux/perf_event.h

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kernel/events/core.c

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