Messages in this thread | | | From | Andreas Dilger <> | Date | Thu, 19 Sep 2002 00:13:01 -0600 | Subject | Re: [BENCHMARK] EXT3 vs EXT2 results with rmap14a and testing with contest 0.34 |
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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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