From owner-freebsd-stable@FreeBSD.ORG Mon Feb 10 03:44:08 2014 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C03A8CB5 for ; Mon, 10 Feb 2014 03:44:08 +0000 (UTC) Received: from ozzie.tundraware.com (ozzie.tundraware.com [75.145.138.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 786A61A1E for ; Mon, 10 Feb 2014 03:44:08 +0000 (UTC) Received: from [192.168.0.2] (viper.tundraware.com [192.168.0.2]) (authenticated bits=0) by ozzie.tundraware.com (8.14.8/8.14.8) with ESMTP id s1A3hq4D000157 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Sun, 9 Feb 2014 21:43:52 -0600 (CST) (envelope-from tundra@tundraware.com) Message-ID: <52F84AF8.8050007@tundraware.com> Date: Sun, 09 Feb 2014 21:43:52 -0600 From: Tim Daneliuk User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: freebsd-stable@freebsd.org Subject: And Here I Thought buildworld/makeworld Was IO Bound Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.4.3 (ozzie.tundraware.com [75.145.138.73]); Sun, 09 Feb 2014 21:43:52 -0600 (CST) X-TundraWare-MailScanner-Information: Please contact the ISP for more information X-TundraWare-MailScanner-ID: s1A3hq4D000157 X-TundraWare-MailScanner: Found to be clean X-TundraWare-MailScanner-From: tundra@tundraware.com X-Spam-Status: No X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Feb 2014 03:44:08 -0000 For some years now, I have been doing nightly builds of -STABLE on an old Pentium D machine with 2G of memory. Buildworld + 2 different kernels was taking in the neighborhood of 3 1/2 hours or so to run. I then upgraded the Mobo/CPU to a Haswell Quadcore I5-4570 and, sure enough, the build time for all the above came down to 30-35 mins or so. "So", says I, "I'll bet a faster drive would help considering all the scribbling to the disk the compilers and makes do". So, I upgdared to a Kingston SSD Now 300, 120G hard drive and he time to do the above went down to .... wait, it's still about 30-35 mins ???? So, I've tried fiddling with different values for -j on the make command line to little avail. Well, -j8 and -j16 show no real difference here. So is the bounding function here actually CPU not IO? Am I missing something? Thanks, P.S. Trying now with no -j arg on make invocation. -- ---------------------------------------------------------------------------- Tim Daneliuk tundra@tundraware.com PGP Key: http://www.tundraware.com/PGP/