Messages in this thread |  | | | Date | Wed, 17 Mar 2004 21:43:31 -0800 | | From | Andrew Morton <> | | Subject | Re: 2.6.4 ext3fs half order of magnitude slower than xfs - bulk write |
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Matthias Andree <matthias.andree@gmx.de> wrote: > > Andrew Morton: > > > It should be possible to generate a simple testcase which demonstrates this > > problem on that machine. Is that something you can do? > > > > From your description, write-and-fsync.c from > > > > http://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz > > > > would be a good starting point. > > I've run "write-and-fsync -m SIZE -f SOMEFILE" where size is given in > each section and SOMEFILE was chosen for some real-life but idle file > system. I hope this is what you meant. I did one run per test.
Cannot reproduce, sorry. Kernel is 2.6.5-rc1, disk is a "MAXTOR 6L080J4"
time write-and-fsync -m 256 -f foo
writeback caching off, ext3/ordered: write-and-fsync -m 256 -f foo 0.00s user 1.19s system 4% cpu 24.247 total
writeback caching off, XFS: write-and-fsync -m 256 -f foo 0.00s user 0.57s system 2% cpu 24.041 total
writeback caching on, ext3/ordered: write-and-fsync -m 256 -f foo 0.00s user 1.16s system 14% cpu 8.169 total
writeback caching on, XFS: write-and-fsync -m 256 -f foo 0.00s user 0.58s system 8% cpu 6.950 total write-and-fsync -m 256 -f foo 0.00s user 0.54s system 6% cpu 8.109 total write-and-fsync -m 256 -f foo 0.00s user 0.55s system 5% cpu 10.057 total write-and-fsync -m 256 -f foo 0.00s user 0.56s system 8% cpu 6.870 total
(quite some variability in XFS)
So... Maybe you could test some other disks or something? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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