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Date: Wed, 23 Jan 2013 16:30:10 +0800 From: Michael Wang <wangyun@...ux.vnet.ibm.com> To: Mike Galbraith <bitbucket@...ine.de> CC: linux-kernel@...r.kernel.org, mingo@...hat.com, peterz@...radead.org, mingo@...nel.org, a.p.zijlstra@...llo.nl Subject: Re: [RFC PATCH 0/2] sched: simplify the select_task_rq_fair() On 01/23/2013 04:20 PM, Mike Galbraith wrote: > On Wed, 2013-01-23 at 15:10 +0800, Michael Wang wrote: >> On 01/23/2013 02:28 PM, Mike Galbraith wrote: > >>> Abbreviated test run: >>> Tasks jobs/min jti jobs/min/task real cpu >>> 640 158044.01 81 246.9438 24.54 577.66 Wed Jan 23 07:14:33 2013 >>> 1280 50434.33 39 39.4018 153.80 5737.57 Wed Jan 23 07:17:07 2013 >>> 2560 47214.07 34 18.4430 328.58 12715.56 Wed Jan 23 07:22:36 2013 >> >> So still not works... and not going to balance path while waking up will >> fix it, looks like that's the only choice if no error on balance path >> could be found...benchmark wins again, I'm feeling bad... >> >> I will conclude the info we collected and make a v3 later. > > FWIW, I hacked virgin to do full balance if an idle CPU was not found, > leaving the preference to wake cache affine intact though, turned on > WAKE_BALANCE in all domains, and it did not collapse. In fact, the high > load end, where the idle search will frequently be a waste of cycles, > actually improved a bit. Things that make ya go hmmm. Oh, does that means the old balance path is good while the new is really broken, I mean, compared this with the previously results, could we say that all the collapse was just caused by the change of balance path? Regards, Michael Wang > > Tasks jobs/min jti jobs/min/task real cpu > 1 436.60 100 436.5994 13.88 3.80 Wed Jan 23 08:49:21 2013 > 1 437.23 100 437.2294 13.86 3.85 Wed Jan 23 08:49:45 2013 > 1 440.41 100 440.4070 13.76 3.76 Wed Jan 23 08:50:08 2013 > 5 2463.41 99 492.6829 12.30 10.90 Wed Jan 23 08:50:22 2013 > 5 2427.88 99 485.5769 12.48 11.90 Wed Jan 23 08:50:37 2013 > 5 2431.78 99 486.3563 12.46 11.74 Wed Jan 23 08:50:51 2013 > 10 4867.47 99 486.7470 12.45 23.30 Wed Jan 23 08:51:05 2013 > 10 4855.77 99 485.5769 12.48 23.35 Wed Jan 23 08:51:18 2013 > 10 4891.04 99 489.1041 12.39 22.71 Wed Jan 23 08:51:31 2013 > 20 9789.98 96 489.4992 12.38 36.18 Wed Jan 23 08:51:44 2013 > 20 9774.19 97 488.7097 12.40 39.58 Wed Jan 23 08:51:56 2013 > 20 9774.19 97 488.7097 12.40 37.99 Wed Jan 23 08:52:09 2013 > 40 19086.61 98 477.1654 12.70 89.56 Wed Jan 23 08:52:22 2013 > 40 19116.72 98 477.9180 12.68 92.69 Wed Jan 23 08:52:35 2013 > 40 19056.60 98 476.4151 12.72 90.19 Wed Jan 23 08:52:48 2013 > 80 37149.43 98 464.3678 13.05 114.19 Wed Jan 23 08:53:01 2013 > 80 37436.29 98 467.9537 12.95 111.54 Wed Jan 23 08:53:14 2013 > 80 37206.45 98 465.0806 13.03 111.49 Wed Jan 23 08:53:27 2013 > 160 69605.17 97 435.0323 13.93 152.35 Wed Jan 23 08:53:41 2013 > 160 69705.25 97 435.6578 13.91 152.05 Wed Jan 23 08:53:55 2013 > 160 69356.22 97 433.4764 13.98 154.56 Wed Jan 23 08:54:09 2013 > 320 112482.60 94 351.5081 17.24 285.52 Wed Jan 23 08:54:27 2013 > 320 112222.22 94 350.6944 17.28 287.80 Wed Jan 23 08:54:44 2013 > 320 109994.33 97 343.7323 17.63 302.40 Wed Jan 23 08:55:02 2013 > 640 152273.26 94 237.9270 25.47 614.95 Wed Jan 23 08:55:27 2013 > 640 153175.36 96 239.3365 25.32 608.48 Wed Jan 23 08:55:53 2013 > 640 152994.08 95 239.0533 25.35 609.33 Wed Jan 23 08:56:18 2013 > 1280 191101.26 95 149.2979 40.59 1218.71 Wed Jan 23 08:56:59 2013 > 1280 191667.90 94 149.7405 40.47 1215.06 Wed Jan 23 08:57:40 2013 > 1280 191289.77 94 149.4451 40.55 1217.35 Wed Jan 23 08:58:20 2013 > 2560 221654.52 94 86.5838 69.99 2392.78 Wed Jan 23 08:59:31 2013 > 2560 221117.45 91 86.3740 70.16 2399.01 Wed Jan 23 09:00:41 2013 > 2560 220394.94 93 86.0918 70.39 2409.10 Wed Jan 23 09:01:52 2013 > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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