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#1 2020-12-05 13:07:30

freebench
Member
Registered: 2020-06-14
Posts: 52

kvm+qemu+libvirt CPU util after restore

hi

The setup is kvm+qemu+libvirt.

I've noticed that when there is a running machine(guest type doesn't matter) during a laptop going to sleep, the restore from the sleep is sort of "painful". It completely messes up the host machine's CPU - $top show 200% util(qemu-system-x86 proc). It doesn't freeze completely, but host goes super laggy for at least next 10 minutes.
I can't recall that this was happening all the time, I think it's started after some updates probably a month or more ago ...

The solution to this is to shut down all the guests before going to sleep if you don't want to wait 10-15 minute till host is usable again after restore from the sleep.

Has anyone experienced the same ?

$lsmod | grep kvm
kvm_intel             323584  4
kvm                      851968  1 kvm_intel
irqbypass             16384    4 kvm

Linux 5.9.10-arch1-1 #1 SMP PREEMPT Sun, 22 Nov 2020 14:16:59 +0000 x86_64 GNU/Linux

extra/qemu 5.1.0-3 [installed]

community/libvirt 1:6.5.0-3 [installed]
community/libvirt-glib 3.0.0-2 [installed]
community/libvirt-python 1:6.4.0-3 [installed]
community/virt-install 3.2.0-1 [installed]

Last edited by freebench (2020-12-05 22:10:21)

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