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On 5/19/05, Con Kolivas <kernel@kolivas.org> wrote: > ------------snip--------------- > Hyperthread sibling cpus share cpu power. If you let a nice 19 task run full > power on the sibling cpu of a nice 0 task it will drain performance from the > nice 0 task and make it run approximately 40% slower. The only way around > this is to temporarily make the sibling run idle so that a nice 0 task gets > the appropriate proportion of cpu resources compared to a nice 19 task. It is > intentional and quite unique to the linux cpu scheduler as far as I can tell. > On any other scheduler or OS a nice 19 "background" task will make your > machine run much slower. > > Cheers, > Con > Thanks. I understood it's a feature of linux kernel and am satisfied with it. Actually on Windows xp my application sometimes slows down maybe due to inpropoer scheduler. -- Luckiest in the world / Weapon of Mass Distraction http://maverick6664.bravehost.com/ Aviation Jokes: http://www.geocities.com/tetsuji_rai/ Background: http://maverick.ns1.name/ - 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/ | ||||||||||||
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