Linux 6.6 Looks To Be Very Lucrative For AMD Server Performance

[phoronix]

Phoronix: Linux 6.6 Looks To Be Very Lucrative For AMD Server Performance

As a continuation of last week's article looking at Linux 6.6 bringing some impressive gains for AMD EPYC Bergamo, over the past few days I've also tested Linux 6.5 stable and Linux 6.6 Git on Genoa and Genoa-X processors as well as Intel Xeon Scalable "Sapphire Rapids" in looking at this next kernel version's performance. The Sapphire Rapids performance was largely flat while for an interesting class of workloads the Linux 6.6 performance drives the AMD EPYC server performance much higher.

https://www.phoronix.com/review/linux66-epyc-xeon

[Errinwright]

Pretty wild to see this large of an uplift, when regressions were becoming the norm.

[microprobe]

Is there anything that suggests gaming performance of 7900X3D and 7950X3D might benefit on linux 6.6?

[Michael]

Is there anything that suggests gaming performance of 7900X3D and 7950X3D might benefit on linux 6.6?

Nope. 7950X hadn't benefited for gaming in my prior Linux 6.6 tests posted this weekend. And with the Genoa-X not really benefiting on Linux 6.6 leads to even less likelihood of some 7950X3D/7900X3D miracle. More interesting for 7950X3D will be with Linux ~6.7 for AMD Preferred Core patches... I will be testing those patches out when system time allows in the coming days.

[fitzie]

Nope. 7950X hadn't benefited for gaming in my prior Linux 6.6 tests posted this weekend. And with the Genoa-X not really benefiting on Linux 6.6 leads to even less likelihood of some 7950X3D/7900X3D miracle. More interesting for 7950X3D will be with Linux ~6.7 for AMD Preferred Core patches... I will be testing those patches out when system time allows in the coming days.

I hope we can see a threadripper pro in the benchmark mix. I still think AMD is wasting time with that SKU, as I think it's easy to buy a EPYC and use it as a workstation as it is to run last gen zen3 TR.

On the AMD front, it would be really cool for a linux perspective on ryzen ECC support. This isn't normal phoronix lab work but I'd be happy to sponsor such a test/article (I couldn't foot the entire bill, but would kick in something towards it for sure). Here's some interesting windows testing of ECC/ryzen on reddit: https://old.reddit.com/r/truenas/com...oards/jb6m4l4/

[Type44Q]

"...but I'd be happy to sponsor such a test/article..."

If you can afford to donate, donate - otherwise it's just hot air.

You'll have more credibility requesting certain "features" from M if you've already acknowledged his sacrifice by making a contribution... and reach out to him privately rather than signalling your virtue here.

[Errinwright]

Nope. 7950X hadn't benefited for gaming in my prior Linux 6.6 tests posted this weekend. And with the Genoa-X not really benefiting on Linux 6.6 leads to even less likelihood of some 7950X3D/7900X3D miracle. More interesting for 7950X3D will be with Linux ~6.7 for AMD Preferred Core patches... I will be testing those patches out when system time allows in the coming days.

Any chance you can include some 1% frame time lows for the next set of tests, given the scheduler update?

[Michael]

I hope we can see a threadripper pro in the benchmark mix. I still think AMD is wasting time with that SKU, as I think it's easy to buy a EPYC and use it as a workstation as it is to run last gen zen3 TR.

On the AMD front, it would be really cool for a linux perspective on ryzen ECC support. This isn't normal phoronix lab work but I'd be happy to sponsor such a test/article (I couldn't foot the entire bill, but would kick in something towards it for sure). Here's some interesting windows testing of ECC/ryzen on reddit: https://old.reddit.com/r/truenas/com...oards/jb6m4l4/

Per https://www.phoronix.com/review/ryzen-7000-servers I have been doing Ryzen ECC benchmarks... Should have a comparison will probably publish next week.

[S.Pam]

Was NUMA per Socket or NUMA per LLC/CCD/CCX enabled? Would be really interesting to see how those configurations fare.

[Michael]

Was NUMA per Socket or NUMA per LLC/CCD/CCX enabled? Would be really interesting to see how those configurations fare.

All BIOS settings at defaults on all platforms for this round of testing.