freebsd stable - Apr 2018 - Ryzen issues on FreeBSD ? (with sort of workaround)

On 24/04/2018 14:56, Mike Tancsa wrote:
> 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.
Well, I ranh the iperf tests between real machine for 24 hours and that 
worked fine. I also then spun up a Virtualbox with Win10 in it, and ran 
iuperf to there at the same time as doing it betwene real machines, and 
also did a full virus scan to exercise the disc. the idea being to 
replicate Mondays lockup.

But its all fine - the only differece being that I have disabled SMT 
again. Do you get lockup-s with SMT disabled ?

I dint have any experince with bhyve and dont have the tiime to start 
learning right now, hence me testing with VB, which I already have pa nd 
running. I can repeat with SMt on again to veiry that it does then lock up.

All very odd though - am pleased its stable, but dissapinted at the 
amout of stuff I have had to turn off to get it to that state.

-pete.

On 4/24/2018 10:01 AM, Pete French wrote:
> 
> Well, I ranh the iperf tests between real machine for 24 hours and that
> worked fine. I also then spun up a Virtualbox with Win10 in it, and ran
> iuperf to there at the same time as doing it betwene real machines, and
> also did a full virus scan to exercise the disc. the idea being to
> replicate Mondays lockup.
I was able to lock it up with vbox. bhyve was just a little easier to
script and also I figured would be good to get VBox out of the mix in
case it was something specific to VBox.  I dont recall if I tried it
with SMT disabled.  Regardless, on Intel based systems I ran these tests
for 72hrs straight without issue.   I can sort of believe hardware issue
or flaky motherboard BIOSes (2 ASUS MBs, 1 MSI MB, 3 Ryzen chips), but
the fact that two server class MBs from SuperMicro along with an Epyc
chip also does the same thing makes me think something specific to
FreeBSD and this class of AMD CPU :(

	---Mike


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