From owner-freebsd-current@FreeBSD.ORG  Fri Jul 16 03:50:15 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 0AA4216A4CE
	for <freebsd-current@freebsd.org>;
	Fri, 16 Jul 2004 03:50:15 +0000 (GMT)
Received: from fledge.watson.org (fledge.watson.org [204.156.12.50])
	by mx1.FreeBSD.org (Postfix) with ESMTP id B6D5343D45
	for <freebsd-current@freebsd.org>;
	Fri, 16 Jul 2004 03:50:14 +0000 (GMT)
	(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 i6G3npKc089855;
	Thu, 15 Jul 2004 23:49:51 -0400 (EDT)
	(envelope-from robert@fledge.watson.org)
Received: from localhost (robert@localhost)i6G3npk5089852;
	Thu, 15 Jul 2004 23:49:51 -0400 (EDT)
	(envelope-from robert@fledge.watson.org)
Date: Thu, 15 Jul 2004 23:49:51 -0400 (EDT)
From: Robert Watson <rwatson@freebsd.org>
X-Sender: robert@fledge.watson.org
To: Jon Noack <noackjr@alumni.rice.edu>
In-Reply-To: <40F75011.9010707@alumni.rice.edu>
Message-ID: <Pine.NEB.3.96L.1040715234852.50858B-100000@fledge.watson.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
cc: freebsd-current@freebsd.org
cc: Eric Anderson <anderson@centtech.com>
Subject: Re: ACPI degrading.. ?
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: Fri, 16 Jul 2004 03:50:15 -0000


On Thu, 15 Jul 2004, Jon Noack wrote:

> Come to think of it, all of my hard lockups were when Firefox was
> running.  I think (some of) the issues native preemption uncovered are
> related to threading.  In any case, I commented out "#define PREEMPTION" 
> in src/sys/<ARCH>/include/param.h and rebuilt my kernel so it would stay
> up for more than 30 minutes. 

I've also drawn the same conclusion -- to trigger the hangs, I run MySQL
with a threaded benchmark.  Otherwise, things seem fairly stable on my
test boxes.  Could you try running with PREEMPTION and using libthr
instead of libkse and see if you get the same result?

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