Re: [PATCH] optional non-interactive mode for cpu scheduler

From: Ingo Molnar
Date: Tue Nov 02 2004 - 10:51:40 EST



* Con Kolivas <kernel@xxxxxxxxxxx> wrote:

> However the non-interactive mode addresses a number of different needs
> that seem to have come up. Specifically:
> I have had users report great success with such a mode on my own
> scheduler in multiple X session setups where very choppy behaviour
> occurs in mainline.

since SCHED_CPUBOUND would be inherited across fork(), it should be
rather easy to start an X session with all tasks as SCHED_CPUBOUND.

but i think the above rather points in the direction of some genuine
weakness in the interactivity code (i know, for which the fix is
staircase ;) which would be nice to debug.

> Many high performance computing people do not wish interactivity code
> modifying their choice of latency/distribution - admittedly this is a
> soft one.

well, SCHED_CPUBOUND would solve their needs too, right?

Ingo
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