From owner-freebsd-hackers@FreeBSD.ORG  Sat Dec 24 02:06:04 2005
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id C36C616A41F
	for <freebsd-hackers@freebsd.org>; Sat, 24 Dec 2005 02:06:04 +0000 (GMT)
	(envelope-from kris@obsecurity.org)
Received: from elvis.mu.org (elvis.mu.org [192.203.228.196])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 49BCD43D4C
	for <freebsd-hackers@freebsd.org>; Sat, 24 Dec 2005 02:06:04 +0000 (GMT)
	(envelope-from kris@obsecurity.org)
Received: from obsecurity.dyndns.org (elvis.mu.org [192.203.228.196])
	by elvis.mu.org (Postfix) with ESMTP id 278DE1A3C1C;
	Fri, 23 Dec 2005 18:06:04 -0800 (PST)
Received: from [127.0.0.1] (localhost [127.0.0.1])
	by obsecurity.dyndns.org (Postfix) with ESMTP id D9DD8511CB;
	Fri, 23 Dec 2005 21:06:01 -0500 (EST)
Message-ID: <43ACACFB.9070308@obsecurity.org>
Date: Sat, 24 Dec 2005 12:35:47 +1030
From: Kris Kennaway <kris@obsecurity.org>
User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US;
	rv:1.7.12) Gecko/20050915
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Martin Cracauer <cracauer@cons.org>
References: <43A26FFB.9080405@samsco.org>
	<20051216104022.A20877@cons.org>	<20051217063409.GB19094@silverwraith.com>	<20051217080109.GA31849@xor.obsecurity.org>
	<20051222173308.B23728@cons.org>
In-Reply-To: <20051222173308.B23728@cons.org>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-hackers@freebsd.org
Subject: Re: My wish list for 6.1
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 24 Dec 2005 02:06:04 -0000

Martin Cracauer wrote:

> 
> I tried to model different worklods.  The parallel part of my
> benchmark suite has CPU-heavy processes, short plain http, php, long
> plain http and mixtures thereof.
> 
> None of these showed the SMP kernel to be an overall disadvantage on a
> one-processor system.

What you want is to find a real-world workload that exercises a lot of 
mutexes.  These exist, and they'll see the most pessimization from 
running SMP kernel on UP.

Kris