From owner-freebsd-questions Thu Apr 8 10:27:11 1999 Delivered-To: freebsd-questions@freebsd.org Received: from eyelab.psy.msu.edu (eyelab.psy.msu.edu [35.8.64.179]) by hub.freebsd.org (Postfix) with ESMTP id 8763D14C4A for ; Thu, 8 Apr 1999 10:27:10 -0700 (PDT) (envelope-from root@eyelab.psy.msu.edu) Received: from devel-eyelab (dhcp109.baker.ssc.msu.edu [35.8.194.109]) by eyelab.psy.msu.edu (8.9.2/8.9.2) with ESMTP id NAA85364 for ; Thu, 8 Apr 1999 13:25:09 -0400 (EDT) (envelope-from root@eyelab.psy.msu.edu) Message-Id: <4.2.0.32.19990408131421.00a9b240@eyelab.msu.edu> X-Sender: root@eyelab.msu.edu X-Mailer: QUALCOMM Windows Eudora Pro Version 4.2.0.32 (Beta) Date: Thu, 08 Apr 1999 13:29:50 -0400 To: freebsd-questions@freebsd.org From: Gary Schrock Subject: question about make -jn on single cpu Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Is there any advantage to doing a build with make -jn on a single cpu machine? I did some experimenting with the -current sources over the last few days (the sources are a couple weeks old, before the egcs stuff), and I'm finding that it's faster to do it without the -j option than with it: make -DNOAOUT buildworld: 58m make -j2 -DNOAOUT buildworld: 1h 12m make -j4 -DNOAOUT buildworld: 1h 8m Obviously from those results it definitely doesn't appear that there's an advantage at all. This machine is a p2-350, 64M ram, 7200 rpm ide drive, dma not enabled (I've had problems with dma, so I don't have it enabled right now). Gary Schrock root@eyelab.msu.edu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message