Hi Alex, On Sat, Jan 05, 2013 at 08:37:29AM +0000, Alex Shi wrote: > The patch set base on Linus tree, includes 3 parts, > 1, bug fix and fork/wake balancing clean up. patch 1~6, > the first patch remove one domain level. patch 2~6 simplified fork/wake > balancing, it can increase 10+% hackbench performance on our 4 sockets > SNB EP machine. > > V3 change: > a, added the first patch to remove one domain level on x86 platform. > b, some small changes according to Namhyung Kim's comments, thanks! > > 2, bug fix for load average and implement it into LB, patch 7~12, > That using load average in load balancing, with a initial runnable load > value bug fix. > > V3 change: > a, use rq->cfs.runnable_load_avg as cpu load not > rq->avg.load_avg_contrib, since the latter need much time to accumulate > for new forked task, > b, a build issue fixed with Namhyung Kim's reminder. > > 3, power awareness scheduling, patch 13~22, > The subset implement my previous power aware scheduling proposal: > https://lkml.org/lkml/2012/8/13/139 > It defines 2 new power aware policy balance and powersaving, and then > try to spread or pack tasks on each of sched group level according the > different scheduler policy. That can save much power when task number in > system is no more then LCPU number.
Interesting stuff. I have read through your patches, but it is still not clear to me what metrics you use to determine whether a sched group is fully utilized or if it can be used for packing more tasks. Is it based on nr_running or PJT's tracked load or both? How is the threshold defined? Best regards, Morten > > V3 change: > a, engaged nr_running in max potential utils consideration in periodic > power balancing. > b, try exec/wake small tasks on running cpu not idle cpu. > > Thanks comments on previous version. and Any more comments are appreciated! > > -- Thanks Alex > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/