[Bug 111240] RX 560x is very slow

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111240

Christoph Haag <haagch at frickel.club> changed:

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                 CC|                            |haagch at frickel.club

--- Comment #1 from Christoph Haag <haagch at frickel.club> ---
Created attachment 144944
  --> https://bugs.freedesktop.org/attachment.cgi?id=144944&action=edit
moment of performance drop

I have the same laptop so I tried it and there is actually an interesting
effect, see attached screenshot.

At first performance is quite good, but at some point during the benchmark,
performance and GPU usage suddenly drops a lot.

The performance then stays low permanently, even when restarting the benchmark,
after waiting for the dgpu get shutdown by runpm.

Maybe I'll take a closer look later with more gallium hud graphs and maybe umr
--top, but for now I'll just leave a comment here confirming that there is an
issue.

Also loading the benchmark seems to take much longer after the performance drop
happens, which seems very suspicious.

Tested on Arch with mesa 19.1.3, Linux 5.1, 5.2 and 5.3-rc2. Happens on all
three kernel versions.

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