From: Mike Galbraith <efault@gmx.de>
To: Al Boldi <a1426z@gawab.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: scheduler starvation resistance patches for 2.6.16
Date: Tue, 28 Mar 2006 11:12:00 +0200 [thread overview]
Message-ID: <1143537120.10571.5.camel@homer> (raw)
In-Reply-To: <1143522632.7441.16.camel@homer>
On Tue, 2006-03-28 at 07:10 +0200, Mike Galbraith wrote:
> On Mon, 2006-03-27 at 21:36 +0300, Al Boldi wrote:
> > It's not bad. w/ credit_c1/2 set to 0 results in an improvement in running
> > the MESA demos "# gears & reflect & morph3d" .
>
> Hmm. That's unexpected.
>
> > But a simple "# while :; do :; done &" (10x) makes a "# ping 10.1 -A -s8"
> > choke.
>
> Ouch, so is that. But thanks, testcases are great. I'll look into it.
OK, this has nothing to do with my patches. The same slowdown happens
with a stock kernel when running a few pure cpu hogs. I suspect it has
to do with softirqd, but am still investigating.
-Mike
next prev parent reply other threads:[~2006-03-28 9:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-27 18:36 scheduler starvation resistance patches for 2.6.16 Al Boldi
2006-03-28 5:10 ` Mike Galbraith
2006-03-28 9:12 ` Mike Galbraith [this message]
2006-03-28 20:01 ` Al Boldi
2006-03-29 5:56 ` Mike Galbraith
-- strict thread matches above, loose matches on Subject: below --
2006-03-27 4:35 Mike Galbraith
2006-03-28 4:14 ` Willy Tarreau
2006-03-28 4:56 ` Mike Galbraith
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