From owner-freebsd-current@FreeBSD.ORG  Thu Jun 23 22:47:42 2005
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
X-Original-To: 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 6EF6F16A453;
	Thu, 23 Jun 2005 22:47:42 +0000 (GMT) (envelope-from jhb@FreeBSD.org)
Received: from mv.twc.weather.com (mv.twc.weather.com [65.212.71.225])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 096E843D4C;
	Thu, 23 Jun 2005 22:47:40 +0000 (GMT) (envelope-from jhb@FreeBSD.org)
Received: from [10.50.41.231] (Not Verified[65.202.103.25]) by
	mv.twc.weather.com with NetIQ MailMarshal (v6, 0, 3, 8)
	id <B42bb3f370000>; Thu, 23 Jun 2005 19:01:11 -0400
From: John Baldwin <jhb@FreeBSD.org>
To: freebsd-current@freebsd.org
Date: Thu, 23 Jun 2005 18:28:25 -0400
User-Agent: KMail/1.8
References: <200506091423.39940@harrymail>
	<20050622154538.H26664@fledge.watson.org>
	<20050622150842.GF791@empiric.icir.org>
In-Reply-To: <20050622150842.GF791@empiric.icir.org>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200506231828.27226.jhb@FreeBSD.org>
Cc: Emanuel Strobl <Emanuel.strobl@gmx.net>, Bruce M Simpson <bms@spc.org>,
	Robert Watson <rwatson@freebsd.org>,
	Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?= <des@des.no>
Subject: Re: lapic@2k interrukts eating CPU cycles
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
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: Thu, 23 Jun 2005 22:47:42 -0000

On Wednesday 22 June 2005 11:08 am, Bruce M Simpson wrote:
> On Wed, Jun 22, 2005 at 03:50:24PM +0100, Robert Watson wrote:
> > I have a feature request in to John to add statistics gathering on IPIs,
> > since he's currently reworking the interrupt paths.
>
> I like this LAPIC change a lot. Actually I like APICs a lot. They may not
> give you 'real' vectored hardware interrupts a la SPARC and PowerPC, but
> at least it comes a bit closer.
>
> It would be nice to be doing APIC on uniprocessor systems a bit further
> down the line, but that's for the wishlist -- the 8259s are not going away
> just yet.

I think all new systems going forward are going to have APICs though.  HTT and 
multi core require APIC just like SMP does.

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org