Ryzen issues on FreeBSD ? (with sort of workaround)

Mike Tancsa mike at sentex.net
Tue Apr 24 13:56:12 UTC 2018

On 4/23/2018 8:19 AM, Pete French wrote:
> All worked fine until just no,w when it did lockup. But the lockup
> happened when I fired up VirtualBox as well on the Ryzen machine, had that
> doing a lot of disc activity and also did a lot of ZFS activity on the box
> itself. Which I find interesting, because your lockups were also happenng
> when VirtualBox was running were they not ?
> So, am going to try that again (the iperf test and simultaneous Win10
> in VirtualBox), but with SMT off, to see if I can reproduce it.

I was doing the tests with bhyve, and the iperf tests were between VMs
on the same box.  That seems to trigger it fairly quickly. The Epyc took
a bit more work, but I could reliable do it there too.


Mike Tancsa, tel +1 519 651 3400 x203
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada

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