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Date: Sun, 23 Mar 2003 13:51:02 -0800
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
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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.

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