Re: [regression 5.4.97 → 5.10.24]: raid6 avx2x4 speed drops from 18429 MB/s to 6155 MB/s

2021-04-06 Thread Borislav Petkov
On Tue, Apr 06, 2021 at 12:58:15PM +0200, Paul Menzel wrote: > I booted Linux 5.12-rc6, containing these commits, on a Dell OptiPlex 5055 > with AMD Ryzen 5 PRO 1500 Quad-Core Processor, and the regression is still > present for `avx2x4 xor()`: So I don't think that's a regression - this looks mor

Re: [regression 5.4.97 → 5.10.24]: raid6 avx2x4 speed drops from 18429 MB/s to 6155 MB/s

2021-04-06 Thread Paul Menzel
Dear Borislav, Am 02.04.21 um 16:05 schrieb Borislav Petkov: On Fri, Apr 02, 2021 at 10:33:51AM +0200, Paul Menzel wrote: On an two socket AMD EPYC 7601, we noticed a decrease in raid6 avx2x4 speed shown at the beginning of the boot. 5.4.955.10.24 ---

Re: [regression 5.4.97 → 5.10.24]: raid6 avx2x4 speed drops from 18429 MB/s to 6155 MB/s

2021-04-03 Thread Thomas Backlund
Den 2021-04-02 kl. 17:05, skrev Borislav Petkov: > On Fri, Apr 02, 2021 at 10:33:51AM +0200, Paul Menzel wrote: >> Dear Linux folks, >> >> >> On an two socket AMD EPYC 7601, we noticed a decrease in raid6 avx2x4 speed >> shown at the beginning of the boot. >> >> 5.4.95

Re: [regression 5.4.97 → 5.10.24]: raid6 avx2x4 speed drops from 18429 MB/s to 6155 MB/s

2021-04-02 Thread Borislav Petkov
On Fri, Apr 02, 2021 at 10:33:51AM +0200, Paul Menzel wrote: > Dear Linux folks, > > > On an two socket AMD EPYC 7601, we noticed a decrease in raid6 avx2x4 speed > shown at the beginning of the boot. > >5.4.955.10.24 >

[regression 5.4.97 → 5.10.24]: raid6 avx2x4 speed drops from 18429 MB/s to 6155 MB/s

2021-04-02 Thread Paul Menzel
Dear Linux folks, On an two socket AMD EPYC 7601, we noticed a decrease in raid6 avx2x4 speed shown at the beginning of the boot. 5.4.955.10.24 -- raid6: avx2x4 gen() 18429 MB/s 6155 MB/s raid6: avx2x4 xor()6