Messages in this thread | | | Subject | Re: [RFC] The Linux Scheduler: a Decade of Wasted Cores Report | From | Mike Galbraith <> | Date | Mon, 25 Apr 2016 11:18:45 +0200 |
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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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