> -----Urspr|ngliche Nachricht----- > Von: owner-m...@openbsd.org [mailto:owner-m...@openbsd.org] > Im Auftrag von Tobias Ulmer > Gesendet: Donnerstag, 23. April 2009 14:02 > An: Thomas Pfaff > Cc: misc@openbsd.org > Betreff: Re: Problem with slow disk I/O > > > On Thu, Apr 23, 2009 at 03:27:42PM +0200, Thomas Pfaff wrote: > > I'm getting horrible disk performance compared to Ubuntu on > my system. > > > > I noticed this when extracting ports.tar.gz on the same > machine with > > different OSs (this is something I did a while back to check for a > > possible hardware problem when OpenBSD crashed upon extracting > > ports.tar.gz). > > > > OpenBSD (ffs): > > > > $ time tar -zxf ports.tar.gz 0m59.90s real > 0m1.00s user 0m6.95s system > > > > Ubuntu (ext3): > > > > $ time tar -zxf ports.tar.gz > > real 0m18.440s > > user 0m1.212s > > sys 0m2.596s > > > > 1 minute on OpenBSD and 18.5 seconds on Ubuntu, doing the > exact same > > thing on the exact same hardware! Why the huge difference? > Both are > > default installations, except softdep is turned on. > > > > Thanks for any pointers or advice. > > > Try: time tar -zxf ports.tar.gz && sync > >
better use parenthesis: time ( tar -zxf ports.tar.gz && sync ) Compare # time sleep 1 && sleep 5 0m1.01s real 0m0.00s user 0m0.01s system to # time ( sleep 1 && sleep 5 ) 0m6.01s real 0m0.00s user 0m0.03s system Christoph