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

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 28 Jun 2022 09:11:21 UTC

--- Comment #4 from felice.tufo@gmail.com ---
Hi Mark,
I tried running my example setting EV_ONESHOT too; in my case the problem was
still showing but it could be only a matter of test duration.

I also tried to write a kernel module using the callout framework directly: I
noticed small extra delays (1-2 ms) every now and then, but never big delays
(twice or more of the programmed period) as in userspace, so I agree that there
could be something "strange" going on in the kevent layer.

I'm waiting to have some hw available to launch the test on different systems.

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