From: Gene Heskett <gene.heskett@verizon.net>
Reply-To: gene.heskett@verizon.net
To: Andrew Morton <akpm@osdl.org>, Gawain Lynch <gawain@freda.homelinux.org>
Subject: Re: Terrible interactivity with 2.6.0-t9-mm3
Date: Sun, 16 Nov 2003 22:54:23 -0500
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On Sunday 16 November 2003 21:49, Andrew Morton wrote:
>Gawain Lynch <gawain@freda.homelinux.org> wrote:
>> On Mon, 2003-11-17 at 08:42, Andrew Morton wrote:
>> > Two things to try, please:
>> >
>> > a) Is the problem from Linus's tree?  Try 2.6.0-test9 plus
>> > 	ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2
>> >.6.0-test9/2.6.0-test9-mm3/broken-out/linus.patch
>> >
>> > b) The only significant scheduler change in mm3 was
>> > 	ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2
>> >.6.0-test9/2.6.0-test9-mm3/broken-out/context-switch-accounting-f
>> >ix.patch
>> >
>> >    So please try -mm3 with the above patch reverted with
>> >
>> > 	patch -R -p1 < context-switch-accounting-fix.patch
>>
>> Hi Andrew,
>>
>> This is also easily reproducible here with just a kernel compile.
>>
>> I have tried both a) and b) with b) not changing anything, but a)
>> seems to work...  Anything more to try?
>
>Your report has totally confused me.  Are you saying that the
> jerkiness is caused by linus.patch?  Or not?  Pleas try again ;)

In defense of this code, I ran -mm3 with the deadline elevator for 
about 3 days and was very happy with the interactivity.  Now I've 
been running with the elevator=cfq for most of the day, and it also 
seems to be pretty responsive.  The default as wasn't, at least for 
-mm2, and I haven't tried it yet for -mm3.  Should I, and report back 
in a day or so so that you've got reports from an otherwise identical 
system to compare?

We need a test suite for this :)

-- 
Cheers, Gene
AMD K6-III@500mhz 320M
Athlon1600XP@1400mhz  512M
99.27% setiathome rank, not too shabby for a WV hillbilly
Yahoo.com attornies please note, additions to this message
by Gene Heskett are:
Copyright 2003 by Maurice Eugene Heskett, all rights reserved.

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