From owner-freebsd-stable@FreeBSD.ORG Wed Nov 24 01:58:37 2004 Return-Path: Delivered-To: freebsd-stable@www.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9736116A4CE for ; Wed, 24 Nov 2004 01:58:37 +0000 (GMT) Received: from mx2.freebsd.org (mx2.freebsd.org [216.136.204.119]) by mx1.FreeBSD.org (Postfix) with ESMTP id 815D343D31 for ; Wed, 24 Nov 2004 01:58:37 +0000 (GMT) (envelope-from spamrefuse@yahoo.com) Received: from hub.freebsd.org (hub.freebsd.org [216.136.204.18]) by mx2.freebsd.org (Postfix) with ESMTP id 7020455803 for ; Wed, 24 Nov 2004 01:58:37 +0000 (GMT) (envelope-from spamrefuse@yahoo.com) Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6921B16A4CE for ; Wed, 24 Nov 2004 01:58:37 +0000 (GMT) Received: from auk2.snu.ac.kr (auk2.snu.ac.kr [147.46.100.32]) by mx1.FreeBSD.org (Postfix) with ESMTP id 06BD743D5F for ; Wed, 24 Nov 2004 01:58:37 +0000 (GMT) (envelope-from spamrefuse@yahoo.com) Received: from [147.46.44.181] (spamrefuse@yahoo.com) by auk2.snu.ac.kr (Terrace Internet Messaging Server) with ESMTP id 2004112410:55:19:181593.21758.2883394480 for ; Wed, 24 Nov 2004 10:55:19 +0900 (KST) Message-ID: <41A3EA0F.3080500@yahoo.com> Date: Wed, 24 Nov 2004 10:55:27 +0900 From: Rob User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.3) Gecko/20041113 X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-stable@lists.freebsd.org References: <41A2C5C0.3080908@yahoo.com> <2566.10.0.0.26.1101241872.squirrel@10.0.0.26> In-Reply-To: <2566.10.0.0.26.1101241872.squirrel@10.0.0.26> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-TERRACE-SPAMMARK: YES-__TRSYS_LV__3 (SR:-1.02) (SRN:SPAMROBOT) ----------------- Subject: Re: make -j$n buildworld : use of -j investigated X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Nov 2004 01:58:37 -0000 Brian Szymanski wrote: > Did you try any machines that used Hyperthreading? I'd be interested to > see how those machines fare based on the number of logical and real CPUs. > > >>Although people suggest "-j4" as optimal in general >>case, I have come to a very different conclusion: >> >>1) single CPU with enough RAM (2 GHz, 512 MB) >> there's no significant speed up in the range >> "-j1" to "-j9". >> So "-j1" is as good as "-j9". > > > If you went to all that trouble, you might as well post the numbers :-) Time unit is minutes. CPU: 2x800 MHz 2000 MHz 333 MHz RAM: 1024 MB 512 MB 64 MB -j -------------------------------- 1 99 50 276 2 58 49 291 3 58 50 367 4 57 50 547 5 58 49 6 58 50 7 57 50 8 58 50 9 58 50 Rob.