On 18/06/2018 14:59, Mike Tancsa wrote:> FYI, both my Epyc and Ryzen system have been running 2+ days with the
> tests that would normally hard lock the system in 5-60 min. The combo of
> Microcode updates and system settings
Thats for the update - I turned all the default motherboard settings
back on when I got into work this morning, and it has been running fine
so far. WIll run like this all week.
> https://lists.freebsd.org/pipermail/freebsd-current/2018-June/069799.html
>
> seem to have fixed the last issue I was seeing
Yes, those are the chnages I have applied. I went through that list over
the weekend cross-referncing them to the errata document, and there are
a couple of things in there which made me think 'aha!' - particularly
the MWWAIT causing lockups on SMT, as it was disbling SMT that made it
stable for me.
I also have access to a cpuple of (virtualised) Epyc machines which I am
going to run up later in the week and try the workarounds there. But it
does look very much like its fixed, which is excellent.
Preseumably in the slightly longer term these workarounds go into the
actual kernel if it detects Ryzen ?
-pete.