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Groups > linux.kernel > #1386149
| From | Mike Galbraith <umgwanakikbuti@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC] The Linux Scheduler: a Decade of Wasted Cores Report |
| Date | 2016-04-25 11:20 +0200 |
| Message-ID | <rrKQp-3ck-7@gated-at.bofh.it> (permalink) |
| References | <rratA-7AU-13@gated-at.bofh.it> <rrhbI-4rx-9@gated-at.bofh.it> <rrml4-A9-15@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Sun, 2016-04-24 at 09:05 +0200, Mike Galbraith wrote: > On Sat, 2016-04-23 at 18:38 -0700, Brendan Gregg wrote: > > > The bugs they found seem real, and their analysis is great (although > > using visualizations to find and fix scheduler bugs isn't new), and it > > would be good to see these fixed. However, it would also be useful to > > double check how widespread these issues really are. I suspect many on > > this list can test these patches in different environments. > > Part of it sounded to me very much like they're meeting and "fixing" > SMP group fairness... Ew, NUMA boxen look like they could use a hug or two. Add a group of one hog to compete with a box wide kbuild, ~lose a node. Master.today, 4 node box, make -j 192 modules root group real 1m6.987s 1.00 cgroup vs 1 group of 1 hog real 1m20.871s 1.20 cgroup vs 2 groups of 1 hog real 1m48.803s 1.62 -Mike
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[RFC] The Linux Scheduler: a Decade of Wasted Cores Report Jeff Merkey <linux.mdb@gmail.com> - 2016-04-23 20:30 +0200
Re: [RFC] The Linux Scheduler: a Decade of Wasted Cores Report Brendan Gregg <brendan.d.gregg@gmail.com> - 2016-04-24 03:40 +0200
Re: [RFC] The Linux Scheduler: a Decade of Wasted Cores Report Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-04-24 09:10 +0200
Re: [RFC] The Linux Scheduler: a Decade of Wasted Cores Report Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-04-25 11:20 +0200
[patch] sched: Fix smp nice induced group scheduling load distribution woes Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-04-27 09:20 +0200
Re: [patch] sched: Fix smp nice induced group scheduling load distribution woes Peter Zijlstra <peterz@infradead.org> - 2016-04-28 11:20 +0200
Re: [RFC] The Linux Scheduler: a Decade of Wasted Cores Report Peter Zijlstra <peterz@infradead.org> - 2016-04-25 11:40 +0200
Re: [RFC] The Linux Scheduler: a Decade of Wasted Cores Report Rik van Riel <riel@redhat.com> - 2016-04-25 20:00 +0200
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