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Date: Mon, 09 Apr 2007 10:24:40 +0200 From: Mike Galbraith <efault@....de> To: Gene Heskett <gene.heskett@...il.com> Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>, Con Kolivas <kernel@...ivas.org>, Andrew Morton <akpm@...ux-foundation.org>, ck list <ck@....kolivas.org> Subject: Re: Ten percent test On Mon, 2007-04-09 at 01:16 -0400, Gene Heskett wrote: > On Monday 09 April 2007, Mike Galbraith wrote: > > > >So tar -cvf - / | gzip --best | tar -tvzf - should reproduce the > >problem? > > > That looks as if it should demo it pretty well if I understand correctly > everything you're doing there. Ok, I can't reproduce any bad interactivity here with that workload either with SMP or UP kernel. That said however, gzip does attain interactive status, which it really should not - that gives it an unfair advantage over it's peers. With my throttled tree, it gets pushed back down to where it belongs. I'm going to try to tighten the tolerance on behavior to evict the riffraff who don't really belong in the elite interactive club sooner, and guarantee that even fast/light tasks can't dominate the CPU without paying heavily. (to close the many fast/light tasks wakeup scenario that the "untested" patch someone mentioned did, but was shown to be too painful to bare). -Mike - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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