Re: [BENCHMARK] EXT3 vs EXT2 results with rmap14a and testing with contest 0.34
Andreas Dilger (adilger@clusterfs.com)
Thu, 19 Sep 2002 00:13:01 -0600
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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