From owner-freebsd-questions Thu Mar 21 16:44:49 2002 Delivered-To: freebsd-questions@freebsd.org Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.80]) by hub.freebsd.org (Postfix) with ESMTP id 2BABA37B421 for <questions@FreeBSD.ORG>; Thu, 21 Mar 2002 16:44:41 -0800 (PST) Received: by wantadilla.lemis.com (Postfix, from userid 1004) id 7DD4978340; Fri, 22 Mar 2002 11:14:37 +1030 (CST) Date: Fri, 22 Mar 2002 11:14:37 +1030 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: John Kozubik <john@kozubik.com> Cc: Patrick Thomas <root@utility.clubscholarship.com>, questions@FreeBSD.ORG Subject: Re: is there overhead in SMP machines related to SMP ? Message-ID: <20020322111437.A463@wantadilla.lemis.com> References: <20020321130710.B49090@wantadilla.lemis.com> <Pine.BSF.4.21.0203201847050.9183-100000@www> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <Pine.BSF.4.21.0203201847050.9183-100000@www> User-Agent: Mutt/1.3.23i Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: <freebsd-questions.FreeBSD.ORG> List-Archive: <http://docs.freebsd.org/mail/> (Web Archive) List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions) List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-questions> List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-questions> X-Loop: FreeBSD.ORG On Wednesday, 20 March 2002 at 18:48:58 -0800, John Kozubik wrote: >> >> Probably something else is going on. You can't really tell just from >> vmstat. Note also that it's not very interesting to optimize the idle >> state. 4.5 has a number of inefficiencies in SMP; we're addressing >> some of them in 5.0. >> > > thanks. if you don't mind I have some miscellaneous questions: > > 1. these inefficiences aren't such that it will keep me from using 4.5 SMP > for production environments, are they ? In general, no. If it didn't work, we wouldn't have released it. But it seems to hit database systems particularly hard. > 2. is 5.0 SMP slated to do 8 processors (or more?) We're not aiming for a specific number of processors. > 3. do you know how many processors sparc64 FreeBSD SMP supports ? Or will > it always be the same number of procs that x86 supports ? No. No. The SPARC64 port is still under development. I'd be surprised if the end result wouldn't run with as many processors as the system has. Greg -- See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message