Messages in this thread | | | From | Con Kolivas <> | Subject | Re: HT scheduler: is it really correct? or is it feature of HT? | Date | Thu, 19 May 2005 17:18:55 +1000 |
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On Thu, 19 May 2005 04:58 pm, Tetsuji "Maverick" Rai wrote: > 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. > > > 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.
Well I invented it so it's very unlikely that Windows* will have it (?yet) :D
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