On Thursday 17 November 2005 18:22, Vladimir V. Saveliev wrote: > Hello > > Hesse, Christian wrote: > > Vladimir V. Saveliev wrote: > >>Please try whether the attached patch improves anything. It simplifies > >>fsync by avoid commiting of transactions which do not modify file being > >>fsync-ed. > >> > >>The patch applied to 2.6.14-mm2 with warnings, but that can be ignored. > > > > Hi everybody, > > > > I'm suffering the same problem, sync and fsync are horribly slow. I've > > written a small test program: > > > > http://www.earthworm.de/tmp/reiser4-fsync.c > > > > with 2.6.13: > > sync() = 0 <0.000198> > > fsync(3) = 0 <0.003353> > > > > with 2.6.14 (with and without patch): > > sync() = 0 <2.092873> > > fsync(3) = 0 <0.132579> > > I tried your test on a box with reiser4 root fs: > 2.6.13: > strace -T -e sync,fsync ./eworm xx > fsync(3) = 0 <0.158808> > > 2.6.14-mm2 + > ftp://ftp.namesys.com/pub/reiser4-for-2.6/2.6.14-mm2/reiser4-for-2.6.14-mm2 >-1.patch.gz > > strace -T -e sync,fsync ./eworm xx > fsync(3) = 0 <0.005373> > > Would you please try whether 2.6.14-mm2 with fresh reiser4 update fsyncs > better?
No change, still bad performance: up to 2 seconds in sync(), up to 0.2 seconds in fsync(). -- Christian
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