From: Andrew Morton <akpm@digeo.com>
To: David Mansfield <lkml@dm.cobite.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: very poor performance in 2.5.66[-mm1]
Date: Fri, 28 Mar 2003 12:44:51 -0800 [thread overview]
Message-ID: <20030328124451.2d09bd33.akpm@digeo.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0303281247480.11928-100000@admin>
David Mansfield <lkml@dm.cobite.com> wrote:
>
>
> Hi list.
>
> After all of the rave reviews about the interactivity fixes (both regular
> and I/O scheduler related), I decided to give the 2.5.latest a try on my
> desktop machine (system described below)
>
> I started X, everything seemed fine, maybe a bit faster. I opened a
> 'gnome-terminal' and typed 'ls -ltr'. Wow, it was 20x slower.
>
> Here are the timings for 'ls -ltr':
>
> 2.5.66-mm1: 'ls -ltr' 31 seconds
> 2.5.66-mm1: 'ls -ltr | cat' 2 seconds
> 2.4.18-rhlatest: 'ls -ltr' 1.14 seconds
How many files were there?
My /usr/bin contains 3168 files. An `ls -ltr' in gnome-terminal takes 9.6
seconds. In rxvt it takes 0.5 seconds. That's an 850MHz P3.
So gnome-terminal appears to be a pretty slow application. My guess would be
that something in the 2.5 kernel has exposed a marginality or an outright
bug in it.
It would be interesting to edit include/asm-i386/param.h and set HZ to 100.
next prev parent reply other threads:[~2003-03-28 20:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-28 18:01 very poor performance in 2.5.66[-mm1] David Mansfield
2003-03-28 20:44 ` Andrew Morton [this message]
2003-03-28 21:54 ` David Mansfield
2003-03-28 22:01 ` jjs
2003-03-29 8:13 ` Ingo Molnar
2003-03-31 8:45 ` P
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