Date: Sat, 31 Dec 2005 11:34:46 +0100
From: Paolo Ornati <ornati@fastwebnet.it>
To: Peter Williams <pwil3058@bigpond.net.au>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Con Kolivas <kernel@kolivas.org>, Ingo Molnar <mingo@elte.hu>,
       Nick Piggin <nickpiggin@yahoo.com.au>
Subject: Re: [SCHED] wrong priority calc - SIMPLE test case
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On Sat, 31 Dec 2005 13:06:04 +1100
Peter Williams <pwil3058@bigpond.net.au> wrote:

> Attached is a testing version of a patch for modifying scheduler bonus 
> calculations that I'm working on.  Although these changes aren't 
> targetted at the problem you are experiencing I believe that they may 
> help.  My testing shows that sched_fooler instances don't get any 
> bonuses but I would appreciate it if you could try it out.
> 
> It is a patch against the 2.6.15-rc7 kernel and includes some other 
> scheduling patches from the -mm kernels.

Yes, this fixes both my test-case (transcode & little program), they
get priority 25 instead of ~16.

But the priority of DD is now ~23 and so it still suffers a bit:

paolo@tux /mnt $ mount space/; time dd if=space/bigfile of=/dev/null bs=1M count=128; umount space/
128+0 records in
128+0 records out

real    0m8.549s	(instead of 4s)
user    0m0.000s
sys     0m0.209s

-- 
	Paolo Ornati
	Linux 2.6.15-rc7-lial on x86_64
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