Messages in this thread | | | From | Valentin Schneider <> | Subject | Re: [REGRESSION] 5-10% increase in IO latencies with nohz balance patch | Date | Mon, 06 Dec 2021 09:48:14 +0000 |
| |
On 03/12/21 14:00, Josef Bacik wrote: > On Fri, Dec 03, 2021 at 12:03:27PM +0000, Valentin Schneider wrote: >> Could you give the 4 top patches, i.e. those above >> 8c92606ab810 ("sched/cpuacct: Make user/system times in cpuacct.stat more precise") >> a try? >> >> https://git.gitlab.arm.com/linux-arm/linux-vs.git -b mainline/sched/nohz-next-update-regression >> >> I gave that a quick test on the platform that caused me to write the patch >> you bisected and looks like it didn't break the original fix. If the above >> counter-measures aren't sufficient, I'll have to go poke at your >> reproducers... >> > > It's better but still around 6% regression. If I compare these patches to the > average of the last few days worth of runs you're 5% better than before, so > progress but not completely erased. >
Hmph, time for me to reproduce this locally then. Thanks!
| |