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perf ftrace: Use atomic inc to update histogram in BPF

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It should use an atomic instruction to update even if the histogram is
keyed by delta as it's also used for stats.

Cc: Gabriele Monaco <gmonaco@redhat.com>
Link: https://lore.kernel.org/r/20250227191223.1288473-3-namhyung@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Namhyung Kim 2025-02-27 11:12:23 -08:00
parent 79056b3fe8
commit e1cde2d5e9
1 changed files with 1 additions and 1 deletions
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2
tools/perf/util/bpf_skel/func_latency.bpf.c
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@ -142,7 +142,7 @@ int BPF_PROG(func_end)
if (!hist)
return 0;
*hist += 1;
__sync_fetch_and_add(hist, 1);
__sync_fetch_and_add(&total, delta); // always in nsec
__sync_fetch_and_add(&count, 1);