From owner-freebsd-current@FreeBSD.ORG  Tue Jun  1 19:22:32 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 28D7A16A4CF
	for <freebsd-current@freebsd.org>;
	Tue,  1 Jun 2004 19:22:32 -0700 (PDT)
Received: from fledge.watson.org (fledge.watson.org [204.156.12.50])
	by mx1.FreeBSD.org (Postfix) with ESMTP id C1D3143D49
	for <freebsd-current@freebsd.org>;
	Tue,  1 Jun 2004 19:22:31 -0700 (PDT)
	(envelope-from robert@fledge.watson.org)
Received: from fledge.watson.org (localhost [127.0.0.1])
	by fledge.watson.org (8.12.11/8.12.11) with ESMTP id i522LpNd009241;
	Tue, 1 Jun 2004 22:21:51 -0400 (EDT)
	(envelope-from robert@fledge.watson.org)
Received: from localhost (robert@localhost)i522LoFd009238;
	Tue, 1 Jun 2004 22:21:51 -0400 (EDT)
	(envelope-from robert@fledge.watson.org)
Date: Tue, 1 Jun 2004 22:21:50 -0400 (EDT)
From: Robert Watson <rwatson@freebsd.org>
X-Sender: robert@fledge.watson.org
To: Luke <luked@pobox.com>
In-Reply-To: <Pine.NEB.4.60.0406011838190.29037@sdf.lonestar.org>
Message-ID: <Pine.NEB.3.96L.1040601222058.6295C-100000@fledge.watson.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
cc: freebsd-current@freebsd.org
Subject: Re: Cap on network speed in CURRENT?
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 02 Jun 2004 02:22:32 -0000


On Tue, 1 Jun 2004, Luke wrote:

> This is indeed a very slow host, by modern standards.  It's a fussy old
> Pentium 166MHz that I've put through hell for the last eight years or
> so. 
> 
> I'm building a kernel with witness and invariants turned off.  Building
> a kernel usually takes overnight.  I'll try it out tomorrow and see how
> it goes.  If those testing programs don't require X, I'll see about
> installing one of them to help me figure out what's going on.  The iperf
> site looks like it's got some helpful information that I should read
> too. 

Also, try disabling SMP and possibly APIC support if it's a UP box. 
There's a measurable performance overhead to compiling with SMP support,
since mutexes have to be compiled with locked instructions. 

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Senior Research Scientist, McAfee Research