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    SubjectRe: [patch v4 0/18] sched: simplified fork, release load avg and power awareness scheduling
    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.





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