From e16fd7f2cb1a65555cfe76f983eaefb1eab7471f Mon Sep 17 00:00:00 2001 From: Kan Liang Date: Thu, 1 Sep 2022 06:09:58 -0700 Subject: perf: Use sample_flags for data_src 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 Signed-off-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20220901130959.1285717-6-kan.liang@linux.intel.com --- kernel/events/core.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'kernel/events') diff --git a/kernel/events/core.c b/kernel/events/core.c index f0af45db02b3..163e2f478e61 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -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); -- cgit v1.2.3