Messages in this thread | | | From | Theodore Dubois <> | Date | Fri, 6 Sep 2019 16:28:24 -0700 | Subject | perf_event wakeup_events = 0 |
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The man page for perf_event_open(2) says that recent kernels treat a 0 value for wakeup_events the same as 1, which I believe means it will notify after a single sample. However, strace on perf(1) shows that it uses wakeup_events=0, and it's definitely not waking up on every sample (it seems to be waking up every few seconds.) tools/perf/design.txt says "Normally a notification is generated for every page filled". Is the documentation wrong, or am I misunderstanding something?
~Theodore
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