Messages in this thread |  | | | Date | Fri, 19 Jan 2001 02:08:52 +0100 | | From | Andi Kleen <> | | Subject | Re: multi-queue scheduler update |
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On Thu, Jan 18, 2001 at 08:00:16PM -0500, Mark Hahn wrote: > > > microseconds/yield > > > # threads 2.2.16-22 2.4 2.4-multi-queue > > > ------------ --------- -------- --------------- > > > 16 18.740 4.603 1.455 > > > > I remeber the O(1) scheduler from Davide Libenzi was beating the mainline O(N) > > isn't the normal case (as in "The Right Case to optimize") > where there are close to zero runnable tasks? what realistic/sane > scenarios have very large numbers of spinning threads? all server > situations I can think of do not. not volanomark -loopback, surely!
I think the main point of Mike's patch is decreasing locking and cache line bouncing overhead of multi cpu scheduling, not optimizing lots of runnable tasks.
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