linux-kernel - Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2

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Message-Id: <1173778398.6810.21.camel@Homer.simpson.net>
Date:	Tue, 13 Mar 2007 10:33:18 +0100
From:	Mike Galbraith <efault@....de>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Con Kolivas <kernel@...ivas.org>,
	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	ck list <ck@....kolivas.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2

On Tue, 2007-03-13 at 09:18 +0100, Ingo Molnar wrote:

> Con, we want RSDL to /improve/ interactivity. Having new scheduler 
> interactivity logic that behaves /worse/ in the presence of CPU hogs, 
> which CPU hogs are even reniced to +5, than the current interactivity 
> code, is i think a non-starter. Could you try to fix this, please? Good 
> interactivity in the presence of CPU hogs (be them default nice level or 
> nice +5) is _the_ most important scheduler interactivity metric. 
> Anything else is really secondary.

I just retested with the encoders at nice 0, and the x/gforce combo is
terrible.  Funny thing though, x/gforce isn't as badly affected with a
kernel build.  Any build is quite noticable, but even at -j8, the effect
doen't seem to be (very brief test warning applies) as bad as with only
the two encoders running.  That seems quite odd.

	-Mike

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