From owner-freebsd-current@FreeBSD.ORG Sun Nov 30 06:34:45 2003 Return-Path: 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 8D42A16A4CE for ; Sun, 30 Nov 2003 06:34:45 -0800 (PST) Received: from tx1.oucs.ox.ac.uk (tx1.oucs.ox.ac.uk [129.67.1.167]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1741543FE0 for ; Sun, 30 Nov 2003 06:34:44 -0800 (PST) (envelope-from colin.percival@wadham.ox.ac.uk) Received: from scan1.oucs.ox.ac.uk ([129.67.1.166] helo=localhost) by tx1.oucs.ox.ac.uk with esmtp (Exim 4.20) id 1AQSep-0005GA-GR for freebsd-current@freebsd.org; Sun, 30 Nov 2003 14:34:43 +0000 Received: from rx1.oucs.ox.ac.uk ([129.67.1.165]) by localhost (scan1.oucs.ox.ac.uk [129.67.1.166]) (amavisd-new, port 25) with ESMTP id 20150-04 for ; Sun, 30 Nov 2003 14:34:42 +0000 (GMT) Received: from gateway.wadham.ox.ac.uk ([163.1.161.253]) by rx1.oucs.ox.ac.uk with smtp (Exim 4.20) id 1AQSeo-0005G5-6G for freebsd-current@freebsd.org; Sun, 30 Nov 2003 14:34:42 +0000 Received: (qmail 1453 invoked by uid 0); 30 Nov 2003 14:34:42 -0000 Received: from colin.percival@wadham.ox.ac.uk by gateway by uid 71 with qmail-scanner-1.16 (sweep: 2.14/3.71. spamassassin: 2.53. Clear:. Processed in 1.723148 secs); 30 Nov 2003 14:34:42 -0000 X-Qmail-Scanner-Mail-From: colin.percival@wadham.ox.ac.uk via gateway X-Qmail-Scanner: 1.16 (Clear:. Processed in 1.723148 secs) Received: from dhcp1131.wadham.ox.ac.uk (HELO piii600.wadham.ox.ac.uk) (163.1.161.131) by gateway.wadham.ox.ac.uk with SMTP; 30 Nov 2003 14:34:41 -0000 Message-Id: <5.0.2.1.1.20031130143248.020dc740@popserver.sfu.ca> X-Sender: cperciva@popserver.sfu.ca X-Mailer: QUALCOMM Windows Eudora Version 5.0.2 Date: Sun, 30 Nov 2003 14:34:37 +0000 To: "Poul-Henning Kamp" From: Colin Percival In-Reply-To: <26251.1070202656@critter.freebsd.dk> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed cc: freebsd-current@freebsd.org Subject: Re: user:sys time ratio X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 30 Nov 2003 14:34:45 -0000 At 15:30 30/11/2003 +0100, Poul-Henning Kamp wrote: >In message <5.0.2.1.1.20031130140203.031e8d08@popserver.sfu.ca>, Colin >Percival > writes: > > When running `make buildworld`, I see large amounts of sys time; eg, 27 > >minutes user & 14 minutes sys for building 5.2, or 14 minutes user & 10 > >minutes sys for building 4.9. I expected the ratio of user:sys to be much > >larger than this, and mailing list traffic indicates that a 4:1 ratio is > >typical. >I've seen UNIX systems have "typical" system/user splits from 1/9 to 9/1 >it all depends on what you're doing. Sure, but buildworld is a fairly well-defined benchmark; I wouldn't expect to see such a large difference when running exactly the same code on different systems. Colin Percival