Messages in this thread | | | Subject | Re: [patch v4 0/18] sched: simplified fork, release load avg and power awareness scheduling | From | Mike Galbraith <> | Date | Mon, 28 Jan 2013 08:33:04 +0100 |
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On Mon, 2013-01-28 at 15:17 +0800, Alex Shi wrote: > On 01/28/2013 02:49 PM, Mike Galbraith wrote: > > On Mon, 2013-01-28 at 13:19 +0800, Alex Shi wrote: > >> On 01/27/2013 06:40 PM, Borislav Petkov wrote: > >>> On Sun, Jan 27, 2013 at 10:41:40AM +0800, Alex Shi wrote: > >>>> Just rerun some benchmarks: kbuild, specjbb2005, oltp, tbench, aim9, > >>>> hackbench, fileio-cfq of sysbench, dbench, aiostress, multhreads > >>>> loopback netperf. on my core2, nhm, wsm, snb, platforms. no clear > >>>> performance change found. > >>> > >>> Ok, good, You could put that in one of the commit messages so that it is > >>> there and people know that this patchset doesn't cause perf regressions > >>> with the bunch of benchmarks. > >>> > >>>> I also tested balance policy/powersaving policy with above benchmark, > >>>> found, the specjbb2005 drop much 30~50% on both of policy whenever > >>>> with openjdk or jrockit. and hackbench drops a lots with powersaving > >>>> policy on snb 4 sockets platforms. others has no clear change. > >>> > >>> I guess this is expected because there has to be some performance hit > >>> when saving power... > >>> > >> > >> BTW, I had tested the v3 version based on sched numa -- on tip/master. > >> The specjbb just has about 5~7% dropping on balance/powersaving policy. > >> The power scheduling done after the numa scheduling logical. > > > > That makes sense. How the numa scheduling numbers compare to mainline? > > Do you have all three available, mainline, and tip w. w/o powersaving > > policy? > > > > I once caught 20~40% performance increasing on sched numa VS mainline > 3.7-rc5. but have no baseline to compare balance/powersaving performance > since lower data are acceptable for balance/powersaving and > tip/master changes too quickly to follow up at that time. > :)
(wow. dram sucks, dram+smp sucks more, dram+smp+numa _sucks rocks_;)
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