From: Andrew Morton <akpm@digeo.com>
To: Aaron Lehmann <aaronl@vitelus.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: smp overhead, and rwlocks considered harmful
Date: Sun, 23 Mar 2003 13:51:02 -0800 [thread overview]
Message-ID: <20030323135102.7bd3654d.akpm@digeo.com> (raw)
In-Reply-To: <20030323214357.GA22181@vitelus.com>
Aaron Lehmann <aaronl@vitelus.com> wrote:
>
> On Sat, Mar 22, 2003 at 05:58:16PM -0800, Andrew Morton wrote:
> >
> > I've been looking at the CPU cost of the write() system call. Time how long
> > it takes to write a million bytes to an ext2 file, via a million
> > one-byte-writes:
>
> Are you using a sysenter-capable C library?
No. That would certainly help the numbers.
But it is unrelated to the lock overhead problem.
next prev parent reply other threads:[~2003-03-23 21:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-23 1:58 Andrew Morton
2003-03-23 3:39 ` David S. Miller
2003-03-23 3:55 ` Anton Blanchard
2003-03-23 4:04 ` Andrew Morton
2003-03-23 6:25 ` Anton Blanchard
2003-03-23 12:33 ` Michael Vergoz
2003-03-23 15:17 ` Alan Cox
2003-03-23 21:43 ` Aaron Lehmann
2003-03-23 21:51 ` Andrew Morton [this message]
2003-03-23 6:34 Adam J. Richter
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