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From: Shawn Starr <spstarr@sh0n.net>
Organization: sh0n.net
To: Andreas Dilger <adilger@clusterfs.com>
Subject: Re: [BENCHMARK] EXT3 vs EXT2 results with rmap14a and testing with contest 0.34
Date: Thu, 19 Sep 2002 01:44:20 -0400
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Well, all the tests were done in single user mode =)

On September 19, 2002 02:13 am, Andreas Dilger wrote:
> On Sep 19, 2002  00:16 -0400, Shawn Starr wrote:
> > These results compare EXT3 against EXT2 with rmap using the contest tool
> > you can get it at: http://contest.kolivas.net
> >
> > These tests are from a Athlon MP 2000+ w/ 512MB RAM
> >
> > noload:
> >
> > Kernel					Time            	CPU
> > 2.4.20-pre7-rmap14a-xfs-uml-shawn12d            259.47		99%
> > 2.4.20-pre7-rmap14a-xfs-uml-shawn12d            267.66          	97%
> >
> > process_load:
> >
> > Kernel                  			Time            	CPU
> > 2.4.20-pre7-rmap14a-xfs-uml-shawn12d            318.91          	80%
> > 2.4.20-pre7-rmap14a-xfs-uml-shawn12d            324.44          	79%
> >
> > io_halfmem:
> >
> > Kernel                  			Time			CPU
> > 2.4.20-pre7-rmap14a-xfs-uml-shawn12d            306.82          	87%
> > 2.4.20-pre7-rmap14a-xfs-uml-shawn12d            461.74          	57%
> >
> > io full mem:
> >
> > Kernel					Time			CPU
> > 2.4.20-pre7-rmap14a-xfs-uml-shawn12d            325.39          	82%
> > 2.4.20-pre7-rmap14a-xfs-uml-shawn12d            411.47          	64%
>
> I don't see this as hugely surprising.  ext3 uses more CPU than ext2.
> If you are using up the CPU doing other things, then naturally ext3
> will take a longer wall-clock time to complete the same tasks as ext2.
>
> I know that Andrew has been doing a bunch of work to reduce ext3 CPU
> usage/locking/etc., but I think that is all in 2.5 kernels.
>
> Cheers, Andreas
> --
> Andreas Dilger
> http://www-mddsp.enel.ucalgary.ca/People/adilger/
> http://sourceforge.net/projects/ext2resize/

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