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Date: Sun, 14 Jul 2002 21:42:50 +0200
From: Tomas Szepe <szepe@pinerecords.com>
To: linux-kernel@vger.kernel.org
Cc: Sean Neakums <sneakums@zork.net>, Joerg Schilling <schilling@fokus.gmd.de>
Subject: Re: IDE/ATAPI in 2.5
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> > > > A Pentium 1200 running Linux-2.5.25 (ext3) results in:
> > > > 
> > > > # star -xp -time < rock.tar.bz2
> > > > star: WARNING: Archive is bzip2 compressed, trying to use the -bz option.
> > > > star: 10372 blocks + 1536 bytes (total of 106210816 bytes = 103721.50k).
> > > > star: Total time 3190.483sec (32 kBytes/sec)
> > > > 53:10.490r 12.299u 2970.099s 93% 0M 0+0k 0st 0+0io 4411pf+0w
> > > > 
> > > > You see, during the 53:20, the machine is only 7% idle!
> > > 
> > > A Pentium 1200, eh?
> > > More like Pentium 120 or star just doesn't cut it.
> > 
> > Now I'm actually pretty sure you meant 386DX/33!
> > 
> > I don't know whom you're trying to fool, but even my P2/233
> > can get the work done in under 5 minutes:
> > 
> > kala@hubert:/tmp$ time tar xjf rock.tar.bz2
> > 
> > real    4m50.598s
> > user    0m36.700s
> > sys     1m51.860s
> > 
> > Linux 2.4.19-pre10-ac2, reiserfs 3.6.
> 
> Aha, but reiserfs's directories are indexed, are they not?  Whereas
> ext3's directories are flat and require a linear search for lookups
> and modifications.  This may be what Joerg's example highlights.

Unfortunately, I don't have an ext3 partition handy to perform a quick
test, but the following Joerg's accusation has been invalidated nonetheless:

> Solaris and FreeBSD put all the effort into one filesystem trying to make
> it as good as possible. In Linux, it seems that nobody prooved the overall
> concept of the kernel.

If that's the case, how come a Linux-powered Pentium 233 can do in
5 minutes for what a Solaris-powered Pentium 800 needs 7 minutes?

I believe Joerg owes a big big apology to Al Viro here.

T.
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