[Bug 264867] kevent EVFILT_TIMER, timer expiration with twice the period

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 30 Jun 2022 09:10:34 UTC

--- Comment #7 from felice.tufo@gmail.com ---
Hi Mark, unfortunately I have to share the system with other engineers, so I'll
try to run the test with the cpuset command as soon as possibile (hopefully
during the weekend).
In the meantime I can add some info:

- I didn't specify the target cpu when arming a callout, nor when using kevent

- the original problem fired on a multithreaded program, but only one of the
threads was calling kevent(), the others were receiving data on sockets. The
program run at priority 0, but not pinned to any cpu. I somehow suspected that
multithreading could fire the problem more frequently, so I wrote the
multithreaded test program I attached to this bug report, but the original
problem fired while a single thread was calling kevent with a 50ms period.

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