From owner-cvs-all Wed May 9 10:30: 6 2001 Delivered-To: cvs-all@freebsd.org Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66]) by hub.freebsd.org (Postfix) with ESMTP id 54C5337B422; Wed, 9 May 2001 10:30:00 -0700 (PDT) (envelope-from imp@harmony.village.org) Received: from harmony.village.org (localhost.village.org [127.0.0.1]) by harmony.village.org (8.11.3/8.11.1) with ESMTP id f49HTab38677; Wed, 9 May 2001 11:29:36 -0600 (MDT) (envelope-from imp@harmony.village.org) Message-Id: <200105091729.f49HTab38677@harmony.village.org> To: Bruce Evans Subject: Re: port policies Cc: Mikhail Teterin , eric@FreeBSD.org, mi@aldan.algebra.com, knu@iDaemons.org, will@physics.purdue.edu, sobomax@FreeBSD.org, kris@obsecurity.org, kris@FreeBSD.org, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org In-reply-to: Your message of "Wed, 09 May 2001 19:32:12 +1000." References: Date: Wed, 09 May 2001 11:29:36 -0600 From: Warner Losh Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In message Bruce Evans writes: : -j2 on a single-CPU machine with 2 disks (src on one, obj and root on the : other) was a little slower and consumed more resources for makeworld : the last time I checked. It might be faster because the disk(s) are too : slow relative to the CPU and/or the VMIO cache is too small. It's hard : to see how it could consume less resources. I think that people are getting confused because for a kernel build -j 2 or -j 3 can be up to 10-15% faster than no -j flags at all. They figure this translates well to the rest of the system. We have a 4CPU system here that we made faster on buildworld by removing one of its CPUs... Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message