hawihoney Posted May 14, 2021 Share Posted May 14, 2021 (edited) The default configuration for the Slackware VM does include the following <clock> definition: <clock offset='utc'> <timer name='rtc' tickpolicy='catchup'/> <timer name='pit' tickpolicy='delay'/> <timer name='hpet' present='no'/> </clock> Running a slackware (Unraid) VM I see the "tsc" and "acpi_pm" timers running instead. As I'm always experiencing timer problems with "tsc" how can I work around that? Should I add "tsc" to the <clock> element? Here's the error I see in a Unraid VM. Whenever this happens, performance of the VM degrades by 3/4: May 4 02:10:40 TowerVM01 kernel: clocksource: timekeeping watchdog on CPU2: Marking clocksource 'tsc' as unstable because the skew is too large: May 4 02:10:40 TowerVM01 kernel: clocksource: 'acpi_pm' wd_now: 70aa1c wd_last: 51d1b1 mask: ffffff May 4 02:10:40 TowerVM01 kernel: clocksource: 'tsc' cs_now: 5b65e65f2fb54 cs_last: 5b65e12de6c58 mask: ffffffffffffffff May 4 02:10:40 TowerVM01 kernel: tsc: Marking TSC unstable due to clocksource watchdog May 4 02:10:40 TowerVM01 kernel: clocksource: Switched to clocksource acpi_pm Question #1: Why is a timer running in my VMs that is not declared in the VM configuration? Question #2: Would it possibly help to add an additional "tsc" timer to the <clock>? <timer name='tsc' tickpolicy='catchup' mode='auto'/> Thanks in advance. Edited May 17, 2021 by hawihoney Quote Link to comment
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