On 23.07.23 14:11, Linux regression tracking #adding (Thorsten Leemhuis) wrote: > On 23.07.23 11:39, Oleksandr Natalenko wrote: >> On neděle 16. července 2023 21:50:53 CEST Greg Kroah-Hartman wrote: >>> From: Andres Freund <andres@xxxxxxxxxxx> >>> >>> commit 8a796565cec3601071cbbd27d6304e202019d014 upstream. >>> >>> I observed poor performance of io_uring compared to synchronous IO. That >>> turns out to be caused by deeper CPU idle states entered with io_uring, >>> due to io_uring using plain schedule(), whereas synchronous IO uses >>> io_schedule(). > #regzbot introduced 8a796565cec360107 ^ > https://bbs.archlinux.org/viewtopic.php?id=287343 > https://bugzilla.kernel.org/show_bug.cgi?id=217700 > https://bugzilla.kernel.org/show_bug.cgi?id=217699 > #regzbot title block: io_uring: high iowait rates and stalls > #regzbot ignore-activity Apparently expected behavior: https://lore.kernel.org/lkml/538065ee-4130-6a00-dcc8-f69fbc7d7ba0@xxxxxxxxx/ #regzbot resolve: notabug: on a closer look it turned out that's expected behavior Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr That page also explains what to do if mails like this annoy you. #regzbot ignore-activity
