From owner-freebsd-sparc Mon Feb 3 14:55:16 2003 Delivered-To: freebsd-sparc@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6FCF037B407; Mon, 3 Feb 2003 14:55:14 -0800 (PST) Received: from k6.locore.ca (k6.locore.ca [198.96.117.170]) by mx1.FreeBSD.org (Postfix) with ESMTP id 019A643FCB; Mon, 3 Feb 2003 14:55:11 -0800 (PST) (envelope-from jake@k6.locore.ca) Received: from k6.locore.ca (jake@localhost.locore.ca [127.0.0.1]) by k6.locore.ca (8.12.6/8.12.6) with ESMTP id h13MueNk007196; Mon, 3 Feb 2003 17:56:40 -0500 (EST) (envelope-from jake@k6.locore.ca) Received: (from jake@localhost) by k6.locore.ca (8.12.6/8.12.6/Submit) id h13MueJm007195; Mon, 3 Feb 2003 17:56:40 -0500 (EST) Date: Mon, 3 Feb 2003 17:56:40 -0500 From: Jake Burkholder To: Mike Barcroft Cc: Garance A Drosihn , sparc64@FreeBSD.org Subject: Re: SMP and Sparc64 Message-ID: <20030203175640.D2837@locore.ca> References: <20030203172739.C2837@locore.ca> <20030203174024.F15651@espresso.q9media.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20030203174024.F15651@espresso.q9media.com>; from mike@FreeBSD.org on Mon, Feb 03, 2003 at 05:40:24PM -0500 Sender: owner-freebsd-sparc@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Apparently, On Mon, Feb 03, 2003 at 05:40:24PM -0500, Mike Barcroft said words to the effect of; > Jake Burkholder writes: > > Apparently, On Mon, Feb 03, 2003 at 05:20:51PM -0500, > > Garance A Drosihn said words to the effect of; > > > > > I notice the GENERIC kernel for the sparc64 port has SMP support > > > turned on. I also vaguely remember some comment somewhere that > > > indicated this was intentional. Is it a bad idea to comment out > > > those lines on sparc64 kernels? > > > > Doesn't make much difference. There's a very small performance improvement > > for removing it on a UP system, but I doubt its measurable. > > This might become an issue in the future with sched_ule, since it has > SMP conditional code that does affect performance. Hmm, good point. Using ifdefs for that stuff is arguably a bug. Jake To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-sparc" in the body of the message