On debian guest: # cat /sys/devices/system/clocksource/clocksource0/current_clocksource refined-jiffies # cat /sys/devices/system/clocksource/clocksource0/available_clocksource refined-jiffies jiffies
In */etc/default/grub *I appended clocksource=tsc tsc=reliable in the variable GRUB_CMDLINE_LINUX_DEFAULT Before: GRUB_CMDLINE_LINUX_DEFAULT="quiet" After: GRUB_CMDLINE_LINUX_DEFAULT="quiet clocksource=tsc tsc=reliable" Update GRUB: #sudo update-grub After rebooting: # cat /sys/devices/system/clocksource/clocksource0/current_clocksource tsc # cat /sys/devices/system/clocksource/clocksource0/available_clocksource tsc Now sleep on guest debian works as expected. Thanks a lot!!! Il giorno sab 21 ott 2023 alle ore 16:54 Brian Conway < bcon...@rcesoftware.com> ha scritto: > On Sat, Oct 21, 2023, at 2:36 AM, Luca Di Gregorio wrote: > > Host: > > # uname -a > > OpenBSD xxx.my.domain 7.4 GENERIC.MP#1397 amd64 > > # dmesg | egrep '(VMX/EPT|SVM/RVI)' > > vmm0 at mainbus0: VMX/EPT > > # vmctl show > > ID PID VCPUS MAXMEM CURMEM TTY OWNER STATE NAME > > 2 17798 1 1.0G 519M ttyp4 root running debian > > 1 89226 1 1.0G 1006M ttyp2 root running obsd > > > > Guest debian: > > root@debian:~# lsb_release -a > > No LSB modules are available. > > Distributor ID: Debian > > Description: Debian GNU/Linux 12 (bookworm) > > Release: 12 > > Codename: bookworm > > > > I see a strange behavior on the guest debian. > > With a simple 'sleep 2', I see that the sleep time is much more than 2 > secs. > > Can be observed with: > > root@debian:~# while [ 1 ]; do sleep 2; date; done > > > > On obsd guest, that is OpenBSD 7.4, sleep works as expected. > > > > Is this a bug of vmd? > > Clock sources can be an issue across host-VM combinations. I'd check what > yours look like in the Linux VM: > > `cat /sys/devices/system/clocksource/clocksource0/available_clocksource` > > `cat /sys/devices/system/clocksource/clocksource0/current_clocksource` > > If that is the cause, there are a few ways to skin that cat. The approach > that has worked well for me, and doesn't require installing any additional > software on the guest side, is to append the following to the kernel boot > parameters for the Linux VM: > > clocksource=tsc tsc=reliable > > In Alpine this is done with /etc/update-extlinux.conf and > `update-extlinux`. I don't remember the details of Debian and its GRUB > configuration, but I recall it being fairly straightforward. > > Brian Conway > RCE Software, LLC > >
