Ryzen 5 3600 on Asus gaming TUF x570 is very slow in Linux.
I've tried it in Debian testing, Debian stable and Arch.
The phoronix ffmpeg test takes 120sec instead of 5sec.
some benchmarks are attached.
I've updated BIOS to latest: 'TUF-GAMING-X570-PLUS-ASUS-3405' from factory v2607.

Asus doesn't seem to allow downgrading BIOS?

Attached Thumbnails

         

edit:
I just fiddled with some BIOS settings, and it works normally now
yay!


edit2:
spoke too soon. ffmpeg now takes 33 seconds instead of 5.

I also use the 3405 update with the same CPU on a similar ASUS-board (X570-P) and it runs fine. Did you forget to save your Bios-Settings in a "profile" and reload them after the update?

You can downgrade the Bios and sometimes it works. This depends on what things were changed between the versions, when they changed something regarding CPLDs that are involved in updating other firmware on the board you can brick your board during the update. Or in that older bios something was not changed and then the firmware on different chips does not fit, this way you bricked your board after the update.
As they really not support it officially, better don't do it.

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I've had to clearRTC (cmos?) several times.
It shouldn't be so slow with factory settings?

my PSU didn't have all the cables, so I connected only the 8pin connector (2x4pin). but manual says that is ok.

Enough swap?

Anyway. Those benchmarks are difficult to repeat. Any part of your system can cause it to be worse. Almost never better.

Clear Linux OS might offer a better benchmark.

Isn't there some way to get gpu offload on ffmpeg?

swap is turned off. I'll try with some, but with 8Gb RAM, this test shouldn't need it?
it is a cpu test: https://openbenchmarking.org/test/pts/ffmpeg
will try Clear Linux

Opps, forget Clear linux for ffmpeg as it is not directly available. There is a third party build if you flat out need it. Otherwise it is a compile from sources.

Also your source and version of ffmpeg may affect tests.

Video card may also.

it seems newest kernel should fix some amd cpu issues: https://www.phoronix.com/scan.php?pa...11-fixed&num=1
but Debian doesn't have v5.11 yet.
I thought phoronix uses its own binaries for tests
if video card matters so much, that cpu chart is useless.

Zen2 CPUs run fine with Linux 5.4 and 5.10. The article you posted there is about 5.11 having worse performance on zen2 and they mostly fixed it.

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Is then some definite test for my Ryzen 5 3600?
As it is I don't see much ( if any ) speed increase in ffmpeg transcoding over i5 750

I've tried windows10 too. It seems all Ryzen cores are stuck at 550MHz maximum.
Others have same problem on google, but I couldn't find solution. Perhaps software can't fix this.
Is the problem more likely to be in CPU or motherboard?

edit:
https://community.amd.com/t5/process.../211365/page/3

grange,

On page 3 of that link it appears that a change of motherboard did the trick for one owner.

Having said that, there are an awful lot of people with similar problems here:
https://community.amd.com/t5/process...ral/td-p/81121

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It seems to work fine if PROCHOT is disabled in 'Ryzen Master', however:

PROCHOT is a safety feature; thermal sensor might be broken?
RyzenMaster works in Windows(10) only.
PROCHOT cant be disabled in BIOS?
so it can't be fixed in Linux?


edit: just found this: https://github.com/moceap/Faster

edit2: errors
rdmsr: CPU 0 cannot read MSR 0x000001fc


edit3:
found this for Linux, dunno if it works on desktop:
https://gitlab.com/ryzen-controller-...er#debian-like

has anyone tried it?

I've solved it at last.
Updated the BIOS, but it was still slow. Then I changed some settings and it finally works full speed in Linux.
The crucial setting is probably enabling 'Advanced/AMD Overclocking/AMD Overclocking\SoC/Uncore OC mode' (Forces CPU SoC... to run at their maximum frequences at all times.)

I have also enabled 'LN2 Mode' and disabled 'Precision Boost Overdrive' in same menu branch