From owner-freebsd-current@FreeBSD.ORG  Fri Jun 25 18:32:29 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 42A9816A4CE; Fri, 25 Jun 2004 18:32:29 +0000 (GMT)
Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id C168243D2F; Fri, 25 Jun 2004 18:32:28 +0000 (GMT)
	(envelope-from scottl@freebsd.org)
Received: from [192.168.0.12] (g4.samsco.home [192.168.0.12])
	(authenticated bits=0)
	by pooker.samsco.org (8.12.11/8.12.10) with ESMTP id i5PIZ9ZI051819;
	Fri, 25 Jun 2004 12:35:09 -0600 (MDT)
	(envelope-from scottl@freebsd.org)
Message-ID: <40DC6F47.1020506@freebsd.org>
Date: Fri, 25 Jun 2004 12:30:31 -0600
From: Scott Long <scottl@freebsd.org>
User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US;
	rv:1.7) Gecko/20040514
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Gerrit Nagelhout <gnagelhout@sandvine.com>
References: <FE045D4D9F7AED4CBFF1B3B813C85337054EC4D1@mail.sandvine.com>
In-Reply-To: <FE045D4D9F7AED4CBFF1B3B813C85337054EC4D1@mail.sandvine.com>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
X-Spam-Status: No, hits=0.0 required=3.8 tests=none autolearn=no version=2.63
X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on pooker.samsco.org
cc: freebsd-current@freebsd.org
cc: Julian Elischer <julian@elischer.org>
Subject: Re: STI, HLT in acpi_cpu_idle_c1
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, 25 Jun 2004 18:32:29 -0000

Gerrit Nagelhout wrote:

> Scott Long wrote:
> 
>>This likely means that you're no longer getting any interrupts at all.
>>Btw, is the aac driver running it MPSAFE or FAST mode?  I'm 
>>not sure if
>>changing it to MPSAFE mode will make a difference, and it 
>>certainly will
>>change the timings in our system.
>>
>>Scott
>>
> 
> 
> Looks like it's running in FAST mode.  What will change by running it in
> MPSAFE mode?

In FAST mode, the interrupt handler is directly dispatched when the
interrupt comes in.  In MPSAFE mode, it runs in an ithread.

Scott