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

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Date:	Tue, 13 Mar 2007 20:21:50 +1100
From:	Con Kolivas <kernel@...ivas.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Mike Galbraith <efault@....de>,
	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 Tuesday 13 March 2007 19:18, Ingo Molnar wrote:
> * Mike Galbraith <efault@....de> wrote:
> > [...] The situation as we speak is that you can run cpu intensive
> > tasks while watching eye-candy.  With RSDL, you can't, you feel the
> > non-interactive load instantly. [...]
>
> i have to agree with Mike that this is a material regression that cannot
> be talked around.
>
> 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.

Well I guess you must have missed where I asked him if he would be happy if I 
changed +5 metrics to do whatever he wanted and he refused to answer me. That 
would easily fit within that scheme. Any percentage of nice value he chose. I 
suggest 50% of nice 0. Heck I can even increase it if he likes. All I asked 
for was an answer as to whether that would satisfy his criterion.

> 	Ingo
>
> ps. please be nice to each other - both of you are long-time
>     scheduler contributors who did lots of cool stuff :-)

I have been civil. Only one email crossed the line on my part and I apologise.

-- 
-ck
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