Messages in this thread |  | | Date | Fri, 19 Jan 2001 01:26:16 +0100 | From | Andrea Arcangeli <> | Subject | Re: multi-queue scheduler update |
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On Thu, Jan 18, 2001 at 03:53:11PM -0800, Mike Kravetz wrote: > Here are some very preliminary numbers from sched_test_yield > (which was previously posted to this (lse-tech) list by Bill > Hartner). Tests were run on a system with 8 700 MHz Pentium > III processors. > > 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) scheduler with over 7 tasks in the runqueue (actually I'm not sure if the number was 7 but certainly it was under 10). So if you also use a O(1) scheduler too as I guess (since you have a chance to run fast on the lots of tasks running case) the most interesting thing is how you score with 2/4/8 tasks in the runqueue (I think the tests on the O(1) scheduler patch was done at max on a 2-way SMP btw). (the argument for which Davide's patch wasn't included is that most machines have less than 4/5 tasks in the runqueue at the same time)
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