From owner-freebsd-questions@FreeBSD.ORG Mon Feb 28 15:21:50 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C6E7316A4CE for ; Mon, 28 Feb 2005 15:21:50 +0000 (GMT) Received: from web54001.mail.yahoo.com (web54001.mail.yahoo.com [206.190.36.225]) by mx1.FreeBSD.org (Postfix) with SMTP id F119243D41 for ; Mon, 28 Feb 2005 15:21:49 +0000 (GMT) (envelope-from spamrefuse@yahoo.com) Received: (qmail 58471 invoked by uid 60001); 28 Feb 2005 15:21:48 -0000 Comment: DomainKeys? See http://antispam.yahoo.com/domainkeys DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; b=z3RwF+wIZvOr+TwUTmT9reip052Dc5J6cCvkDm9WzQqQpOZmJVhQ7Lg56WdzCOBY6FYyTtIF7ZHnsxoSGfPX67afwP8yjbsOSiInEh0ZNKy2l4Jlkn9lT5YX0NWq5gStbWUmOA/luUJGxijL3yGuSKE0pIPfQ4al9Int/DOO5Tc= ; Message-ID: <20050228152148.58469.qmail@web54001.mail.yahoo.com> Received: from [147.46.44.181] by web54001.mail.yahoo.com via HTTP; Mon, 28 Feb 2005 07:21:48 PST Date: Mon, 28 Feb 2005 07:21:48 -0800 (PST) From: Rob To: FreeBSD questions MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii cc: aentgood@gmail.com Subject: Re: how long does it takes you to do a make buildworld X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Feb 2005 15:21:50 -0000 Luke Kearney wrote: > On Mon, 28 Feb 2005 09:23:38 -0500 > "Kevin A. Pieckiel" spake thus: > > >>On Wed, Feb 23, 2005 at 08:05:17PM +0000, Wouter van Rooij wrote: >> >>>I'm very curious about how long it took you guys to do a make buildworld. >>>So I thought let's start a topic about it.;-) >> >>Between 22 to 26 hours. Pentium classic, 166MHz, 32 MB RAM. >> >>When I bumped up the RAM to 48, it cut that down to under a day because >>it didn't have to swap all the time. I think it was somehwere between >>8 and 16 hours then. >> >>Oh, on my good system, it takes about 15 mins. >>Dual P4 3.2 GHz with HT enabled (four virtual procs) >>1 GB RAM >> >>And I haven't done a recent buildworld on my dual proc Alpha in a while. > > > With 5.3 release on a dual sparc 450 with 1Gb memory it takes about 3 > hours give or take. I have a couple of dual PIII 1Ghz and they take > between 30 to 50 mins. On a PII 333Mhz about 5hrs. Learnt early on never > to try and do it on a tight schedule ;-) ---- On 'regular' Intel PCs with enough RAM (little swapping only), I use as a rule of thumb following equation: time = 1e5 / (speed * nproc) where time - in minutes speed - CPU speed in MHz nproc - number of processors For the examples above: 166MHz ~10 hrs. dual-3.2 GHz ~16 min. dual-1Ghz ~50 min. And I have another 6 PCs here, ranging from 150 MHz to dual GHz, for which this formula also works fine. Although my formula was heavily critized on the mailinglist, because there are too many factors that determine the compilation time, it sort of seems to work roughly on simple Intel based PC's. Regards, Rob. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com