Messages in this thread | | | Subject | Re: [patch 2/2] sched: fix select_idle_sibling() logic in select_task_rq_fair() | From | Mike Galbraith <> | Date | Sat, 06 Mar 2010 09:36:45 +0100 |
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On Fri, 2010-03-05 at 10:39 -0800, Suresh Siddha wrote: > plain text document attachment (fix_lat_ctx.patch) > Performance improvements with this patch: > "lat_ctx -s 0 2" ~22usec (before-this-patch) ~5usec (after-this-patch)
BTW, is your cpu governor kicking into high gear? That unpatched number looks like a throttled down cpu to me. I know on my box, when there are micro idles, sometimes cores do not throttle up, making for some fairly crappy numbers. Q6600 doesn't throttle down far enough to make such a _huge_ difference though.
-Mike
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