On Sep 7, 2019, at 3:45 PM, Valdis Klētnieks wrote:
> So an entry is made in the buffer. It's not clear that this immediately
> triggers
> a signal…
I think the documentation says it does when wakeup_events is 1. The code for
perf backs this up:
On Sat, 07 Sep 2019 09:14:49 -0700, Theodore Dubois said:
Reading what it actually says rather than what I thought it said.. :)
Events come in two flavors: counting and sampled. A counting event is
one that is used for counting the aggregate number of events that
On Sat, 07 Sep 2019 09:14:49 -0700, Theodore Dubois said:
> If Iâm reading this right, this is a sampling event which overflows 4000
> times a second. But perf then does a poll call which wakes up on this FD with
> POLLIN after 1.637 seconds, instead of 0.00025 seconds.
No, it *takes a sample*
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