Am 11.02.21 um 15:28 schrieb Peter Robinson: > On Thu, Feb 11, 2021 at 1:03 PM Ondrej Mosnacek <omosnace@xxxxxxxxxx> wrote: >> On Thu, Feb 11, 2021 at 10:14 AM Viktor Ashirov <vashirov@xxxxxxxxxx> wrote: >>> On Wed, Feb 3, 2021 at 5:54 PM Michael Catanzaro <mcatanzaro@xxxxxxxxx> wrote: > […] >>> This was bugging me for a while. I also noticed that Fedora 32 is a bit slower than it used to be. Compilation time of a project that I'm working on went from ~35-36 seconds to ~47-48. At first I thought that it's just another round of CPU vulnerabilities mitigations that introduced a performance drop. But after some digging I found that the default CPU governor was switched from 'ondemand' to 'schedutil' in Fedora kernel 5.9.7: > […] > It was upstream changes, the Intel maintainer changed it in [1] if > X86_INTEL_PSTATE state was selected in late March which would make > sense in the timg, and also changed for arm arches [2] in July. > > If that change was made upstream I'm assuming it was assumed that > performance should be equivalent or better than the other option, I > suspect we should engage with upstream as they're probably interested > in the issues. FWIW, I wonder if some changes that were merged for mainline this week might be related: https://git.kernel.org/torvalds/c/291009f656e8eaebbdfd3a8d99f6b190a9ce9deb https://git.kernel.org/torvalds/c/d11a1d08a082a7dc0ada423d2b2e26e9b6f2525c https://git.kernel.org/torvalds/c/3c55e94c0adea4a5389c4b80f6ae9927dd6a4501 But I'm not entirely sure what CPUs are affected by d11a1d08a082 HTH, CU, thl _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/kernel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
