[vfio-users] VFIO and random host crashes

[Brett Peckinpaugh]

Are you monitoring processor utilization? 2 systems like you describe could tax a host. Maybe it is cpu starvation? 

On May 18, 2016 7:47:11 AM PDT, Colin Godsey <crgodsey at gmail.com> wrote:
>I’ve been running a dual gaming VM rig (2x dedicated GPU) for a little
>bit
>now, and everything works perfectly except when both VMs are under
>load,
>after an hour or so I get a hard crash and/or reboot. It will either
>reboot
>itself, or will hang so bad the physical ‘reset’ button on the box
>doesnt
>work.
>
>There is 0 evidence in the linux logs about the crash, I literally just
>see
>one of a few standard cron jobs as the syslog, then the next line is
>the
>kernel boot/start-up. Only real evidence I get is that- rarely I can
>hear
>windows crash first. Or windows will crash and Ill get maybe another
>second
>or 2 of ’top’ before the whole system goes down. I find it extremely
>odd
>that there’s some sort of (albeit fast) degradation, but absolutely
>nothing
>interesting in the logs.
>
>So, I’m pretty sure it’s something hardware related- either PSU or my
>mobo
>is crap and is underpowered somewhere. During load, there are about 5
>drives, 2 GTX GPUs, and GBe (~200mbps) all under constant load, so it
>seems
>likely it could be something chipset related.
>
>*So my question is really: is there ANY kind of kernel/vfio software
>level
>issue that could cause this crash? Or does this just sound like
>hardware?*
>I’ve tried several different power configurations at this point, I just
>want to be as sure as possible it’s hardware before i start replacing
>more
>things =\
>
>This is an up to date Ubuntu Xenial, not really running anything
>special.
>I’ve gotten away with running my VMs almost as pure as possible, no
>funny
>workarounds or anything. OVMF, Windows 10, hyper-v flags. Skylake i7 @
>z170M.
>
>
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>
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