Messages in this thread | | | Date | Mon, 21 Jan 2013 16:46:20 +0800 | From | Michael Wang <> | Subject | Re: [RFC PATCH 0/2] sched: simplify the select_task_rq_fair() |
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On 01/21/2013 04:26 PM, Mike Galbraith wrote: > On Mon, 2013-01-21 at 15:34 +0800, Michael Wang wrote: >> On 01/21/2013 02:42 PM, Mike Galbraith wrote: >>> On Mon, 2013-01-21 at 13:07 +0800, Michael Wang wrote: >>> >>>> That seems like the default one, could you please show me the numbers in >>>> your datapoint file? >>> >>> Yup, I do not touch the workfile. Datapoints is what you see in the >>> tabulated result... >>> >>> 1 >>> 1 >>> 1 >>> 5 >>> 5 >>> 5 >>> 10 >>> 10 >>> 10 >>> ... >>> >>> so it does three consecutive runs at each load level. I quiesce the >>> box, set governor to performance, echo 250 32000 32 4096 >>>> /proc/sys/kernel/sem, then ./multitask -nl -f, and point it >>> at ./datapoints. >> >> I have changed the "/proc/sys/kernel/sem" to: >> >> 2000 2048000 256 1024 >> >> and run few rounds, seems like I can't reproduce this issue on my 12 cpu >> X86 server: >> >> prev post >> Tasks jobs/min jobs/min >> 1 508.39 506.69 >> 5 2792.63 2792.63 >> 10 5454.55 5449.64 >> 20 10262.49 10271.19 >> 40 18089.55 18184.55 >> 80 28995.22 28960.57 >> 160 41365.19 41613.73 >> 320 53099.67 52767.35 >> 640 61308.88 61483.83 >> 1280 66707.95 66484.96 >> 2560 69736.58 69350.02 >> >> Almost nothing changed...I would like to find another machine and do the >> test again later. > > Hm. Those numbers look odd. Ok, I've got 8 more cores, but your hefty > load throughput is low. When I look low end numbers, seems your cores > are more macho than my 2.27 GHz EX cores, so it should have been a lot > closer. Oh wait, you said "12 cpu".. so 1 6 core package + HT? This > box is 2 NUMA nodes (was 4), 2 (was 4) 10 core packages + HT.
It's a 12 core package, and only 1 physical cpu:
Intel(R) Xeon(R) CPU X5690 @ 3.47GHz
So does that means the issue was related to the case when there are multiple nodes?
Regards, Michael Wang
> > -Mike > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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