Messages in this thread | | | Date | Mon, 14 Jan 2002 13:19:25 +1100 | From | Rusty Russell <> | Subject | Re: cross-cpu balancing with the new scheduler |
| |
On Sun, 13 Jan 2002 18:01:40 +0100 Manfred Spraul <manfred@colorfullife.com> wrote:
> Is it possible that the inter-cpu balancing is broken in 2.5.2-pre11? > > eatcpu is a simple cpu hog ("for(;;);"). Dual CPU i386. > > $nice -19 ./eatcpu&; > <wait> > $nice -19 ./eatcpu&; > <wait> > $./eatcpu&. > > IMHO it should be > * both niced process run on one cpu. > * the non-niced process runs with a 100% timeslice. > > But it's the other way around: > One niced process runs with 100%. The non-niced process with 50%, and > the second niced process with 50%.
This could be fixed by making "nr_running" closer to a "priority sum".
Ingo?
Rusty. -- Anyone who quotes me in their sig is an idiot. -- Rusty Russell. - 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/
| |