[Bug 219399] System panics after several hours of 14-threads-compilation orgies using poudriere on AMD Ryzen...

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219399

--- Comment #18 from Nils Beyer <nbe at renzel.net> ---
SF,

sorry, but what five values do you mean exactly? I'm currently not at work so I
cannot test anything for the rest of the weekend.

But, because you are experiencing improvments by playing around with voltages,
it's probably more a voltage than a timing problem.

One thing that wonders me most is that the CPU keeps very, very cool at 54°C
during compiling stuff with 14 threads. We're talking about an octa-core CPU
with 3.0 GHz. Even OCing to 3.4GHz, the temperature stays at 58°C.

For my taste this temperature is too low, and this suggests that the Ryzen CPU
is permanently undervoltaged.

If you feel boldly, you can try the following:

    - reset all settings to the default values in your BIOS (also SoC voltage)
    - set the CPU VCore voltage staticly to 1.412V

and see if that helps in your situation. This has been suggested here:

    https://community.amd.com/message/2805287?tstart=0#2805287
    (last sentence)

Because I'm home, I cannot test that at the moment.

I know that this has not much to do with FreeBSD at all, but for some reason
this behaviour is triggered using it. We have another Ryzen-based sever running
Win2008R2, and it doesn't show that behaviour at all...


BTW: my poudriere build system performed a hard reset (instead of a black
screen crash) recently after 8.5 hours - luckily; because so I can still access
it now...

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