Messages in this thread | | | Date | Sun, 13 Jan 2002 18:49:16 -0800 (PST) | From | Davide Libenzi <> | Subject | Re: cross-cpu balancing with the new scheduler |
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On Mon, 14 Jan 2002, Rusty Russell wrote:
> 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".
I've a very simple phrase when QA is bugging me with these corner cases :
"As Designed"
It's much much better than adding code and "Return To QA" :-) I tried priority balancing in BMQS but i still prefer "As Designed" ...
- Davide
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