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perf: Use sample_flags for data_src

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

Remove the data_src 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/20220901130959.1285717-6-kan.liang@linux.intel.com
This commit is contained in:
Kan Liang
2022-09-01 06:09:58 -07:00
committed by Peter Zijlstra
parent 2abe681da0
commit e16fd7f2cb
4 changed files with 13 additions and 5 deletions
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3
kernel/events/core.c
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@@ -7411,6 +7411,9 @@ void perf_prepare_sample(struct perf_event_header *header,
if (filtered_sample_type & PERF_SAMPLE_WEIGHT_TYPE)
data->weight.full = 0;
if (filtered_sample_type & PERF_SAMPLE_DATA_SRC)
data->data_src.val = PERF_MEM_NA;
if (sample_type & PERF_SAMPLE_REGS_INTR) {
/* regs dump ABI info */
int size = sizeof(u64);