Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 19 Aug 2003 12:59:57 +1000 | From | Nick Piggin <> | Subject | Re: [CFT][PATCH] new scheduler policy |
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Nick Piggin wrote:
> > > William Lee Irwin III wrote: > >> On Tue, Aug 19, 2003 at 11:53:01AM +1000, Nick Piggin wrote: >> >>> As per the latest trend these days, I've done some tinkering with >>> the cpu scheduler. I have gone in the opposite direction of most >>> of the recent stuff and come out with something that can be nearly >>> as good interactivity wise (for me). >>> I haven't run many tests on it - my mind blanked when I tried to >>> remember the scores of scheduler "exploits" thrown around. So if >>> anyone would like to suggest some, or better still, run some, >>> please do so. And be nice, this isn't my type of scheduler :P >>> It still does have a few things that need fixing but I thought >>> I'd get my first hack a bit of exercise. >>> Its against 2.6.0-test3-mm1 >>> >> >> Say, any chance you could spray out a brief explanation of your new >> heuristics? >> > > Oh alright. BTW, this one's not for your big boxes yet! It does funny > things with timeslices. But they will be (pending free time) made much > more dynamic, so it should _hopefully_ context switch even less than > the normal scheduler in a compute intensive load. > > OK. timeslices: they are now dynamic. Full priority tasks will get > 100ms, minimum priority tasks 10ms (this is what needs fixing, but > should be OK to test "interactiveness") > > interactivity estimator is gone: grep -i interactiv sched.c | wc -l > gives 0. > > priorities are much the same, although processes are supposed to be > able to change priority much more quickly. > > backboost is back. that is what (hopefully) prevents X from starving > due to the quickly changing priorities thing.
And lack of interactivity estimator.
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