Ryzen lockup on bhyve was (Re: new Ryzen lockup issue ?)
grehan at freebsd.org
Tue Feb 27 23:31:00 UTC 2018
>> I could reproduce this on a Ryzen 1700 with HT enabled - it took ~700
>> seconds, and the entire machine locked up.
>> An interesting point is a single VM was able to run to completion.
>> I'll keep testing with various combinations of numbers of VMs,
>> different vCPUs per VM, and pinning guest vCPUs.
3 4*vCPU guests locked the machine up in ~170 secs, 4 guests ran to
> Not sure if its related to core count or not, but it takes several
> instances on the Epyc to lock up and takes a lot longer. I enabled IOMMU
> on it as well, and it's dmesg shows below. But the lockups are still
> there with or without it enabled.
Would you be able to try on the Epyc with vCPUs pinned, and all guest
vCPUs on different physical CPUs ?
i.e. for a configuration that will lock up, run the same configuration
but with vCPUs pinned. For example, a 4 vCPU guest that will have vCPUs
0-3 pinned to host physical CPUs 7-10 would look like:
-c 4 -p 0:7 -p 1:8 -p 2:9 -p 3:10
More information about the freebsd-virtualization