linux-kernel - Re: Network slowdown due to CFS

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Message-ID: <20071007071811.GA31302@elte.hu>
Date:	Sun, 7 Oct 2007 09:18:11 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jarek Poplawski <jarkao2@...pl>
Cc:	David Schwartz <davids@...master.com>, linux-kernel@...r.kernel.org
Subject: Re: Network slowdown due to CFS


* Jarek Poplawski <jarkao2@...pl> wrote:

> > [...] The timeslices of tasks (i.e. the time they spend on a CPU 
> > without scheduling away) is _not_ maintained directly in CFS as a 
> > per-task variable that can be "cleared", it's not the metric that 
> > drives scheduling. Yes, of course CFS too "slices up CPU time", but 
> > those slices are not the per-task variables of traditional 
> > schedulers and cannot be 'cleared'.
> 
> It's not about this comment alone, but this comment plus "no notion" 
> comment, which appears in sched-design-CFS.txt too.

ok - i've re-read it and it indeed is somewhat confusing without 
additional context. I'll improve the wording. (sched-design-CFS.txt 
needs an update anyway)

	Ingo
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