Messages in this thread | | | Date | Wed, 4 Oct 2023 14:05:44 +0200 | From | Peter Zijlstra <> | Subject | Re: EEVDF and NUMA balancing |
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On Wed, Oct 04, 2023 at 02:01:26PM +0200, Julia Lawall wrote: > > > On Tue, 3 Oct 2023, Peter Zijlstra wrote: > > > On Tue, Oct 03, 2023 at 10:25:08PM +0200, Julia Lawall wrote: > > > Is it expected that the commit e8f331bcc270 should have an impact on the > > > frequency of NUMA balancing? > > > > Definitely not expected. The only effect of that commit was supposed to > > be the runqueue order of tasks. I'll go stare at it in the morning -- > > definitely too late for critical thinking atm. > > Maybe it's just randomly making a bad situation worse rather than directly > introduing a problem. There is a high standard deviatind in the > performance. Here are some results with hyperfine. The general trends > are reproducible.
OK,. I'm still busy trying to bring a 4 socket machine up-to-date... gawd I hate the boot times on those machines :/
But yeah, I was thinking similar things, I really can't spot an obvious fail in that commit.
I'll go have a poke once the darn machine is willing to submit :-)
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