Messages in this thread | | | Date | Thu, 16 May 2013 15:29:24 +0800 | From | Michael Wang <> | Subject | Re: [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 > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
| |