On Thu, 23 Apr 2009 14:13:18 +0200
Otto Moerbeek <o...@drijf.net> wrote:
> On Thu, Apr 23, 2009 at 02:02:06PM +0200, Tobias Ulmer wrote:
>
> > 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
>
> And include the output of mount and show the place where you are untarring.
>
$ mount
/dev/wd0a on / type ffs (local, softdep)
/dev/wd0k on /home type ffs (local, nodev, nosuid, softdep)
fs:/pub on /pub type nfs (nodev, noexec, nosuid, v3, udp, timeo=100)
$ pwd
/home/tpfaff
$ time tar -zxf ports.tar.gz && sync # (... && sync) ~same result
1m2.66s real 0m1.09s user 0m6.85s system
$ time rm -rf ports
0m15.20s real 0m0.15s user 0m1.42s system
