From ee9db0e14b0575aa827579dc2471a29ec5fc6877 Mon Sep 17 00:00:00 2001 From: Kan Liang Date: Thu, 1 Sep 2022 06:09:59 -0700 Subject: perf: Use sample_flags for txn 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 Signed-off-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20220901130959.1285717-7-kan.liang@linux.intel.com --- kernel/events/core.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'kernel') diff --git a/kernel/events/core.c b/kernel/events/core.c index 163e2f478e61..15d27b14c827 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -7414,6 +7414,9 @@ void perf_prepare_sample(struct perf_event_header *header, if (filtered_sample_type & PERF_SAMPLE_DATA_SRC) data->data_src.val = PERF_MEM_NA; + if (filtered_sample_type & PERF_SAMPLE_TRANSACTION) + data->txn = 0; + if (sample_type & PERF_SAMPLE_REGS_INTR) { /* regs dump ABI info */ int size = sizeof(u64); -- cgit v1.2.3