From owner-cvs-src@FreeBSD.ORG  Mon Oct 11 20:49:52 2004
Return-Path: <owner-cvs-src@FreeBSD.ORG>
Delivered-To: cvs-src@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id B842216A4CE; Mon, 11 Oct 2004 20:49:52 +0000 (GMT)
Received: from ylpvm43.prodigy.net (ylpvm43-ext.prodigy.net [207.115.57.74])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 6C8CA43D1F; Mon, 11 Oct 2004 20:49:52 +0000 (GMT)
	(envelope-from nate@root.org)
Received: from [10.0.0.34] (adsl-67-119-74-222.dsl.sntc01.pacbell.net
	[67.119.74.222])i9BKnw9p014244;	Mon, 11 Oct 2004 16:49:58 -0400
Message-ID: <416AF1ED.9060301@root.org>
Date: Mon, 11 Oct 2004 13:49:49 -0700
From: Nate Lawson <nate@root.org>
User-Agent: Mozilla Thunderbird 0.7.3 (X11/20040901)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Alan Cox <alc@cs.rice.edu>
References: <200410110606.i9B66g4t036235@repoman.freebsd.org>
	<20041011202237.GQ9689@cs.rice.edu>
In-Reply-To: <20041011202237.GQ9689@cs.rice.edu>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
cc: cvs-src@FreeBSD.org
cc: src-committers@FreeBSD.org
cc: cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/dev/acpica acpi_cpu.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 11 Oct 2004 20:49:52 -0000

Alan Cox wrote:
> On Mon, Oct 11, 2004 at 06:06:42AM +0000, Nate Lawson wrote:
> 
>>njl         2004-10-11 06:06:42 UTC
>>
>>  FreeBSD src repository
>>
>>  Modified files:
>>    sys/dev/acpica       acpi_cpu.c 
>>  Log:
>>  If bus mastering control is not available (PM2_BLK), don't just disable
>>  C3.  Instead, flush caches before entering C3.  This may be slower but
>>  provides good power savings.
>>  
>>  Revision  Changes    Path
>>  1.44      +28 -17    src/sys/dev/acpica/acpi_cpu.c
> 
> 
> This has pessimized the performance of my P4.  For example, the "buildworld"
> time has increased by 30 seconds (out of ~30 minutes).
> 
> Is there any information about my machine that you would like to have?

I would like to see acpidump -t output and sysctl hw.acpi.  Please be 
sure you can regain performance by doing "sysctl hw.acpi.cpu.cx_lowest=C2".

-Nate