On Monday 21 November 2005 19:44, Hesse, Christian wrote: > On Monday 21 November 2005 19:06, E.Gryaznova wrote: > > Unfortunately we are not able to reproduce this slowdown. Would you > > please provide more info?: > > Is this 2.6.14-mm2 bad sync/fsync performance reproducible on fresh > > created reiser4 too? > > Yes, it is. However, I created the fs with reiser4progs v1.0.4, does that > matter in any way? fsck.reiser4 v1.0.5 reports the fs to be consistent. > > > Are these values stable reproducible? If you run this test several time > > -- do you have the same results? > > Yes, it's reproducible. I think the values have a tolerance of maybe 10%, > but not more. I've never ever seen a sync that used less than 1.5 seconds > on my running system with 2.6.14. > > > Would you please send df -T output and 2.6.14-mm2 config file? > > Attached. > > > Did you try this test on ext2? If no -- would you please try it on ext2 > > for the same kernels and send us the results? > > Will do.
$ for I in `seq 1 5`; do strace -T -e sync,fsync /tmp/reiser4fsync; sleep 1; done sync() = 0 <0.960870> fsync(3) = 0 <0.165802> sync() = 0 <0.387177> fsync(3) = 0 <0.143638> sync() = 0 <0.412164> fsync(3) = 0 <0.154767> sync() = 0 <0.395851> fsync(3) = 0 <0.176921> sync() = 0 <0.392347> fsync(3) = 0 <0.143705> $ cd /boot # boot is my only non-reiser4-partition $for I in `seq 1 5`; do strace -T -e sync,fsync /tmp/reiser4fsync; sleep 1; done sync() = 0 <0.400663> fsync(3) = 0 <0.000288> sync() = 0 <0.306554> fsync(3) = 0 <0.000303> sync() = 0 <0.428365> fsync(3) = 0 <0.000298> sync() = 0 <0.386107> fsync(3) = 0 <0.000304> sync() = 0 <0.405386> fsync(3) = 0 <0.000303> Time for sync() is still the same (as there are mounted reiser4 partitions), fsync() on /boot/ (my only ext2 partition) is as expected. -- Christian
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