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    SubjectRe: [patch 0/8]: use runnable load avg in balance
    On 05/10/2013 11:17 PM, Alex Shi wrote:
    > This patchset bases on tip/sched/core.
    >
    > This version changed the runnable load avg value setting for new task
    > in patch 3rd.
    >
    > We also tried to include blocked load avg in balance. but find many benchmark
    > performance dropping. Guess the too bigger cpu load drive task to be waken
    > on remote CPU, and cause wrong decision in periodic balance.
    >
    > I retested on Intel core2, NHM, SNB, IVB, 2 and 4 sockets machines with
    > benchmark kbuild, aim7, dbench, tbench, hackbench, oltp, and netperf loopback
    > etc. The performance is better now.
    >
    > On SNB EP 4 sockets machine, the hackbench increased about 50%, and result
    > become stable. on other machines, hackbench increased about 2~10%.
    > oltp increased about 30% in NHM EX box.
    > netperf loopback also increased on SNB EP 4 sockets box.
    > no clear changes on other benchmarks.
    >
    > Michael Wang had tested previous version on pgbench on his box:
    > https://lkml.org/lkml/2013/4/2/1022

    Tested the latest patch set (new 3/8 and 6/8) with pgbench, tip
    3.10.0-rc1 and 12 cpu X86 box, works well and still benefit ;-)

    Regards,
    Michael Wang

    >
    > And Morten tested previous version too.
    > http://comments.gmane.org/gmane.linux.kernel/1463371
    >
    > Thanks comments from Peter, Paul, Morten, Miacheal and Preeti.
    > And more comments are appreciated!
    >
    > Regards
    > Alex
    >
    > [patch v6 1/8] Revert "sched: Introduce temporary FAIR_GROUP_SCHED
    > [patch v6 2/8] sched: move few runnable tg variables into CONFIG_SMP
    > [patch v6 3/8] sched: set initial value of runnable avg for new
    > [patch v6 4/8] sched: fix slept time double counting in enqueue
    > [patch v6 5/8] sched: update cpu load after task_tick.
    > [patch v6 6/8] sched: compute runnable load avg in cpu_load and
    > [patch v6 7/8] sched: consider runnable load average in move_tasks
    > [patch v6 8/8] sched: remove blocked_load_avg in tg
    > --
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