From owner-freebsd-smp Tue Sep 28 19:39:41 1999 Delivered-To: freebsd-smp@freebsd.org Received: from cain.gsoft.com.au (genesi.lnk.telstra.net [139.130.136.161]) by hub.freebsd.org (Postfix) with ESMTP id A9179158B3 for ; Tue, 28 Sep 1999 19:39:35 -0700 (PDT) (envelope-from doconnor@gsoft.com.au) Received: from cain.gsoft.com.au (doconnor@cain [203.38.152.97]) by cain.gsoft.com.au (8.8.8/8.8.8) with ESMTP id MAA20734; Wed, 29 Sep 1999 12:09:16 +0930 (CST) (envelope-from doconnor@gsoft.com.au) Message-ID: X-Mailer: XFMail 1.3.1 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Wed, 29 Sep 1999 12:09:16 +0930 (CST) From: "Daniel O'Connor" To: David Scheidt Subject: Re: make question Cc: freebsd-smp@freebsd.org, "Adam D. Marks" Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On 29-Sep-99 David Scheidt wrote: > The -j option controlls the maximium number of jobs that make will spawn. > If you don't supply one, it does every thing serially, and you won't benefit > from the second CPU. The point at which you see the biggest benefit will > depend on what the limit on performance is. In my machine, the limit is > almost always disk performance. Well I did some benchmarks of doing make buildworld for -current on a -current box. I went from 1 to 20 in steps of 2. From memory the best resulsts where about -j 12, but that ate a LOT of memory :) If you actually want to use your computer while doing a compile then -j 4 is probably OK. The system I did it on was a dual PII-350 with an IDE disk and 128 meg of RAM. --- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message