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authorDapeng Mi <dapeng1.mi@linux.intel.com>2025-11-12 16:05:26 +0800
committerPeter Zijlstra <peterz@infradead.org>2025-11-20 10:42:12 +0100
commitf1f96511b1c4c33e53f05909dd267878e0643a9a (patch)
tree8f738b45bc953bbfee51f9e444453ba69a568f62 /net/unix/af_unix.c
parenta24074ca8840cf28fa50c40e957fdc50f29971b3 (diff)
perf: Fix 0 count issue of cpu-clock
Currently cpu-clock event always returns 0 count, e.g., perf stat -e cpu-clock -- sleep 1 Performance counter stats for 'sleep 1': 0 cpu-clock # 0.000 CPUs utilized 1.002308394 seconds time elapsed The root cause is the commit 'bc4394e5e79c ("perf: Fix the throttle error of some clock events")' adds PERF_EF_UPDATE flag check before calling cpu_clock_event_update() to update the count, however the PERF_EF_UPDATE flag is never set when the cpu-clock event is stopped in counting mode (pmu->dev() -> cpu_clock_event_del() -> cpu_clock_event_stop()). This leads to the cpu-clock event count is never updated. To fix this issue, force to set PERF_EF_UPDATE flag for cpu-clock event just like what task-clock does. Fixes: bc4394e5e79c ("perf: Fix the throttle error of some clock events") Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Ian Rogers <irogers@google.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Link: https://patch.msgid.link/20251112080526.3971392-1-dapeng1.mi@linux.intel.com
Diffstat (limited to 'net/unix/af_unix.c')
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