Messages in this thread | | | Subject | Re: [patch] O(1) scheduler-H6/H7/I0 and nice +19 | From | Robert Love <> | Date | 15 Jan 2002 21:59:38 -0500 |
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On Tue, 2002-01-15 at 21:04, Davide Libenzi wrote:
> On 15 Jan 2002, Robert Love wrote: > > This isn't a bad idea, as long as we don't use it as a crutch or > > excuse. That is, answer scheduling problems with "properly nice your > > tasks" -- the scheduler should be smart enough, to some degree. > > > > FWIW, Solaris actually implements a completely different scheduling > > policy, SCHED_INTERACT or something. It is for windowed tasks in X -- > > they get a large interactivity bonus.
> Now ( with 2.5.3-pre1 ) intractivity is *very good* but SCHED_INTERACT > would help *a lot* to get things even more right.
I looked it up; its called class IA. I don't know if it grows from a limitation of their scheduler (i.e. they can't calculate priority and be as fair to interactive tasks as us) or if it offers a fundamental advantage. I suspect their are a myriad of things things we can do with an interactive/GUI scheduling policy.
One thing this is, since their kernel is preemptible, it marks processes that very much always deserve a scheduling boost based on interactivity, and thus their interactivity is quite nice.
Robert Love
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