Ryzen issues on FreeBSD ?

[Peter Moody]

On Fri, Jan 19, 2018 at 12:39 PM, Mike Tancsa <mike at sentex.net> wrote:
> On 1/19/2018 3:32 PM, Peter Moody wrote:
>>
>> I have a ryzen5 1600X and an ASRock AB350M and I've tried just about
>> everything in all of these threads; disabling C state (no effect),
>> setting the sysctl (doesn't exist on my 11.1 RELEASE), tweaking
>> voltage and cooling settings, rma'ing the board the cpu and the
>> memory. nothing helped.
>>
>> last night I tried disabling SMT and, so far so good.
>
>
> Is there anything that can be done to trigger the lockup more reliably ?
> I havent found any patterns. I have had lockups with the system is 100%
> idle and lockups when lightly loaded.  I have yet to see any segfaults
> or sig 11s while doing buildworld (make -j12 or make -j16 even)

"reliably" trigger the lockup, no.

The general pattern was high load followed by low load would lock up;
so a couple 'make -j 32 buildworld' would almost always result in a
lock up a few hours after the last one completes.

weirdly enough though, with SMT enabled, building net/samba47 would
always hang (like compilation segfaults). with SMT disabled, no such
problems.

>         ---Mike
>