Messages in this thread | | | Subject | Re: x264 benchmarks BFS vs CFS | From | Mike Galbraith <> | Date | Fri, 18 Dec 2009 08:30:05 +0100 |
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On Fri, 2009-12-18 at 06:23 +0100, Ingo Molnar wrote:
> Having said that, we generally try to make things perform well without apps > having to switch themselves to SCHED_BATCH. Mike, do you think we can make > x264 perform as well (or nearly as well) under SCHED_OTHER as under > SCHED_BATCH?
It's not bad as is, except for ultrafast mode. START_DEBIT is the biggest problem there. I don't think SCHED_OTHER will ever match SCHED_BATCH for this load, though I must say I haven't full-spectrum tested. This load really wants RR scheduling, and wakeup preemption necessarily perturbs run order.
I'll probably piddle with it some more, it's an interesting load.
-Mike
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