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

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 24 Jun 2022 14:02:57 UTC

--- Comment #2 from felice.tufo@gmail.com ---
Hi Mark

thanks for the answer.

The output of the sysctl command is as follows:

kern.eventtimer.choice: LAPIC(600) HPET(550) i8254(100) RTC(0)
kern.eventtimer.et.i8254.quality: 100
kern.eventtimer.et.i8254.frequency: 1193182
kern.eventtimer.et.i8254.flags: 1
kern.eventtimer.et.RTC.quality: 0
kern.eventtimer.et.RTC.frequency: 32768
kern.eventtimer.et.RTC.flags: 17
kern.eventtimer.et.HPET.quality: 550
kern.eventtimer.et.HPET.frequency: 24000000
kern.eventtimer.et.HPET.flags: 7
kern.eventtimer.et.LAPIC.quality: 600
kern.eventtimer.et.LAPIC.frequency: 2903994335
kern.eventtimer.et.LAPIC.flags: 7
kern.eventtimer.periodic: 0
kern.eventtimer.timer: LAPIC
kern.eventtimer.idletick: 0
kern.eventtimer.singlemul: 2

I did not try other systems because the HW cannot be changed (the application
has to work on that industrial pc), but I could run some tests on other systems
just to see if it is reproducible also on other platforms.

I'm sorry but a test of just few minutes is not enough, I usually let it run
for hours; in one run the issue happened after nearly 1 day and half from the

Also, I never tried 14.0-CURRENT, only 12.2 and 13.1.


You are receiving this mail because:
You are the assignee for the bug.