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Date: Tue, 3 Apr 2001 19:47:00 -0700
From: Mike Kravetz <mkravetz@sequent.com>
To: Fabio Riccardi <fabio@chromium.com>
Cc: Mike Kravetz <mkravetz@sequent.com>, Ingo Molnar <mingo@elte.hu>,
        frankeh@us.ibm.com, Linux Kernel List <linux-kernel@vger.kernel.org>,
        Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: a quest for a better scheduler
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In-Reply-To: <3ACA683A.89D24DED@chromium.com>; from fabio@chromium.com on Tue, Apr 03, 2001 at 05:18:03PM -0700
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On Tue, Apr 03, 2001 at 05:18:03PM -0700, Fabio Riccardi wrote:
> 
> I have measured the HP and not the "scalability" patch because the two do more
> or less the same thing and give me the same performance advantages, but the
> former is a lot simpler and I could port it with no effort on any recent
> kernel.

Actually, there is a significant difference between the HP patch and
the one I developed.  In the HP patch, if there is a schedulable task
on the 'local' (current CPU) runqueue it will ignore runnable tasks on
other (remote) runqueues.  In the multi-queue patch I developed, the
scheduler always attempts to make the same global scheduling decisions
as the current scheduler.

-- 
Mike Kravetz                                 mkravetz@sequent.com
IBM Linux Technology Center
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