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Date: Wed, 09 Sep 2009 14:48:36 +0200 From: Mike Galbraith <efault@....de> To: Jens Axboe <jens.axboe@...cle.com> Cc: Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Con Kolivas <kernel@...ivas.org>, linux-kernel@...r.kernel.org Subject: Re: BFS vs. mainline scheduler benchmarks and measurements On Wed, 2009-09-09 at 13:54 +0200, Jens Axboe wrote: > Things are much better with this patch on the notebook! I cannot compare > with BFS as that still doesn't run anywhere I want it to run, but it's > way better than -rc9-git stock. latt numbers on the notebook have 1/3 > the max latency, average is lower, and stddev is much smaller too. That patch has a bit of bustage in it. We definitely want to turn down sched_latency though, and LAST_BUDDY also wants some examination it seems. taskset -c 3 ./xx 1 (100% cpu 1 sec interval perturbation measurement proggy. overhead is what it is not getting) xx says 2392.52 MHZ CPU perturbation threshold 0.057 usecs. ... 'nuther terminal taskset -c 3 make -j2 vmlinux xx output current (fixed breakage) patched tip tree pert/s: 153 >18842.18us: 11 min: 0.50 max:36010.37 avg:4354.06 sum/s:666171us overhead:66.62% pert/s: 160 >18767.18us: 12 min: 0.13 max:32011.66 avg:4172.69 sum/s:667631us overhead:66.66% pert/s: 156 >18499.43us: 9 min: 0.13 max:27883.24 avg:4296.08 sum/s:670189us overhead:66.49% pert/s: 146 >18480.71us: 10 min: 0.50 max:32009.38 avg:4615.19 sum/s:673818us overhead:67.26% pert/s: 154 >18433.20us: 17 min: 0.14 max:31537.12 avg:4474.14 sum/s:689018us overhead:67.68% pert/s: 158 >18520.11us: 9 min: 0.50 max:34328.86 avg:4275.66 sum/s:675554us overhead:66.76% pert/s: 154 >18683.74us: 12 min: 0.51 max:35949.23 avg:4363.67 sum/s:672005us overhead:67.04% pert/s: 154 >18745.53us: 8 min: 0.51 max:34203.43 avg:4399.72 sum/s:677556us overhead:67.03% bfs209 pert/s: 124 >18681.88us: 17 min: 0.15 max:27274.74 avg:4627.36 sum/s:573793us overhead:56.70% pert/s: 106 >18702.52us: 20 min: 0.55 max:32022.07 avg:5754.48 sum/s:609975us overhead:59.80% pert/s: 116 >19082.42us: 17 min: 0.15 max:39835.34 avg:5167.69 sum/s:599452us overhead:59.95% pert/s: 109 >19289.41us: 22 min: 0.14 max:36818.95 avg:5485.79 sum/s:597951us overhead:59.64% pert/s: 108 >19238.97us: 19 min: 0.14 max:32026.74 avg:5543.17 sum/s:598662us overhead:59.87% pert/s: 106 >19415.76us: 20 min: 0.54 max:36011.78 avg:6001.89 sum/s:636201us overhead:62.95% pert/s: 115 >19341.89us: 16 min: 0.08 max:32040.83 avg:5313.45 sum/s:611047us overhead:59.98% pert/s: 101 >19527.53us: 24 min: 0.14 max:36018.37 avg:6378.06 sum/s:644184us overhead:64.42% stock tip (ouch ouch ouch) pert/s: 153 >48453.23us: 5 min: 0.12 max:144009.85 avg:4688.90 sum/s:717401us overhead:70.89% pert/s: 172 >47209.49us: 3 min: 0.48 max:68009.05 avg:4022.55 sum/s:691879us overhead:67.05% pert/s: 148 >51139.18us: 5 min: 0.53 max:168094.76 avg:4918.14 sum/s:727885us overhead:71.65% pert/s: 171 >51350.64us: 6 min: 0.12 max:102202.79 avg:4304.77 sum/s:736115us overhead:69.24% pert/s: 153 >57686.54us: 5 min: 0.12 max:224019.85 avg:5399.31 sum/s:826094us overhead:74.50% pert/s: 172 >55886.47us: 2 min: 0.11 max:75378.18 avg:3993.52 sum/s:686885us overhead:67.67% pert/s: 157 >58819.31us: 3 min: 0.12 max:165976.63 avg:4453.16 sum/s:699146us overhead:69.91% pert/s: 149 >58410.21us: 5 min: 0.12 max:104663.89 avg:4792.73 sum/s:714116us overhead:71.41% sched_latency=20ms min_granularity=4ms pert/s: 162 >30152.07us: 2 min: 0.49 max:60011.85 avg:4272.97 sum/s:692221us overhead:68.13% pert/s: 147 >29705.33us: 8 min: 0.14 max:46577.27 avg:4792.03 sum/s:704428us overhead:70.44% pert/s: 162 >29344.16us: 2 min: 0.49 max:48010.50 avg:4176.75 sum/s:676633us overhead:67.40% pert/s: 155 >29109.69us: 2 min: 0.49 max:49575.08 avg:4423.87 sum/s:685700us overhead:68.30% pert/s: 153 >30627.66us: 3 min: 0.13 max:84005.71 avg:4573.07 sum/s:699680us overhead:69.42% pert/s: 142 >30652.47us: 5 min: 0.49 max:56760.06 avg:4991.61 sum/s:708808us overhead:70.88% pert/s: 152 >30101.12us: 2 min: 0.49 max:45757.88 avg:4519.92 sum/s:687028us overhead:67.89% pert/s: 161 >29303.50us: 3 min: 0.12 max:40011.73 avg:4238.15 sum/s:682342us overhead:67.43% NO_LAST_BUDDY pert/s: 154 >15257.87us: 28 min: 0.13 max:42004.05 avg:4590.99 sum/s:707013us overhead:70.41% pert/s: 162 >15392.05us: 34 min: 0.12 max:29021.79 avg:4177.47 sum/s:676750us overhead:66.81% pert/s: 162 >15665.11us: 33 min: 0.13 max:32008.34 avg:4237.10 sum/s:686410us overhead:67.90% pert/s: 159 >15914.89us: 31 min: 0.56 max:32056.86 avg:4268.87 sum/s:678751us overhead:67.47% pert/s: 166 >15858.94us: 26 min: 0.13 max:26655.84 avg:4055.02 sum/s:673134us overhead:66.65% pert/s: 165 >15878.96us: 32 min: 0.13 max:28010.44 avg:4107.86 sum/s:677798us overhead:66.68% pert/s: 164 >16213.55us: 29 min: 0.14 max:34263.04 avg:4186.64 sum/s:686610us overhead:68.04% pert/s: 149 >16764.54us: 20 min: 0.13 max:38688.64 avg:4758.26 sum/s:708981us overhead:70.23% -- 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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