On 29.11.2010 14:41, Michael Biebl wrote: > I'm using ext4 (as already mentioned), my small benchmark is (re)installing > vim-runtime using dpkg -i > > 1.15.8.5: > real 0m9.259s > user 0m4.212s > sys 0m0.752s > > 1.15.8.6: > real 0m41.766s > user 0m4.248s > sys 0m1.028s > > 1.15.8.6 (force-unsafe-io): > real 0m8.404s > user 0m4.244s > sys 0m0.752s > > 1.15.8.6 (+patch posix_fadvise): > real 0m7.635s > user 0m4.272s > sys 0m0.840s Something interesting I noticed: I created the ext4 file system on a spare partition and installed a chroot. After running the test, I exited the chroot, immediately unmounted the partition and measured how long it took: 1.15.8.5: 0.4s 1.15.8.6: 7.2s 1.15.8.6+patch: 18.4s If I wait a bit (+60s) after exiting the chroot and then do the unmount, it is almost instant (< 0.2s) in all three cases. Michael -- Why is it that all of the instruments seeking intelligent life in the universe are pointed away from Earth?
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