perf: Use sample_flags for txn

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Use the new sample_flags to indicate whether the txn field is filled by
the PMU driver.

Remove the txn field 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/20220901130959.1285717-7-kan.liang@linux.intel.com

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Kan Liang 2022-09-01 06:09:59 -07:00 • committed by Peter Zijlstra

parent e16fd7f2cb

commit ee9db0e14b

3 changed files with 10 additions and 4 deletions

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8

arch/x86/events/intel/ds.c

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3

include/linux/perf_event.h

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3

kernel/events/core.c

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