From owner-freebsd-hackers Mon Feb 12 18:55:38 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from flood.ping.uio.no (flood.ping.uio.no [129.240.78.31]) by hub.freebsd.org (Postfix) with ESMTP id BEBD737B491 for ; Mon, 12 Feb 2001 18:55:33 -0800 (PST) Received: (from des@localhost) by flood.ping.uio.no (8.9.3/8.9.3) id DAA93067; Tue, 13 Feb 2001 03:55:29 +0100 (CET) (envelope-from des@ofug.org) X-URL: http://www.ofug.org/~des/ X-Disclaimer: The views expressed in this message do not necessarily coincide with those of any organisation or company with which I am or have been affiliated. To: kstewart@urx.com Cc: Matt Dillon , Greg Lehey , Danny Braniss , freebsd-hackers@FreeBSD.ORG Subject: Re: soft updates performance References: <20010213095300.D2178@wantadilla.lemis.com> <200102122343.f1CNhd053320@earth.backplane.com> <3A887EB3.6BDD7648@urx.com> <200102130149.f1D1nDr66705@earth.backplane.com> <3A889F89.8CDD507F@urx.com> From: Dag-Erling Smorgrav Date: 13 Feb 2001 03:55:28 +0100 In-Reply-To: Kent Stewart's message of "Mon, 12 Feb 2001 18:44:25 -0800" Message-ID: Lines: 12 User-Agent: Gnus/5.0802 (Gnus v5.8.2) Emacs/20.4 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Kent Stewart writes: > One other point that I would like to understand is why -j4 takes > longer on all of my systems. That goes against what everyone claims > should happen. More concurrent jobs means more contention and more overhead. Increasing the number of jobs boosts performance to a certain point; past this point, performance starts decreasing again. DES -- Dag-Erling Smorgrav - des@ofug.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message