From owner-freebsd-hackers  Mon Feb 19 13: 5:29 2001
Delivered-To: freebsd-hackers@freebsd.org
Received: from winston.osd.bsdi.com (winston.osd.bsdi.com [204.216.27.229])
	by hub.freebsd.org (Postfix) with ESMTP id D592137B491
	for <freebsd-hackers@FreeBSD.ORG>; Mon, 19 Feb 2001 13:05:27 -0800 (PST)
Received: from winston.osd.bsdi.com (jkh@localhost [127.0.0.1])
	by winston.osd.bsdi.com (8.11.2/8.11.1) with ESMTP id f1JL50H18836;
	Mon, 19 Feb 2001 13:05:00 -0800 (PST)
	(envelope-from jkh@winston.osd.bsdi.com)
To: Dag-Erling Smorgrav <des@ofug.org>
Cc: Robin Cutshaw <robin@XFree86.Org>, freebsd-hackers@FreeBSD.ORG
Subject: Re: Build timings - FreeBSD 4.2 vs. Linux 
In-Reply-To: Message from Dag-Erling Smorgrav <des@ofug.org> 
   of "19 Feb 2001 19:54:06 +0100." <xzpd7celd0x.fsf@flood.ping.uio.no> 
Date: Mon, 19 Feb 2001 13:04:59 -0800
Message-ID: <18832.982616699@winston.osd.bsdi.com>
From: Jordan Hubbard <jkh@winston.osd.bsdi.com>
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

> Yup: 4.x sucks at SMP. Try the comparison again with uniprocessor
> kernels - I expect you'll see a much smaller difference.

I rather doubt that SMP has anything whatsoever to do with this.

4.x's SMP implementation may be far from optimal, but I've done a lot
of my own uniprocessor vs 2 vs 4 CPU configurations and I've never
seen anything as bad as what Robin is describing here.  I'm more
suspicious of differences in the filesystem mount options.

- Jordan


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message