From owner-freebsd-stable Wed Dec 13 0:14:59 2000 From owner-freebsd-stable@FreeBSD.ORG Wed Dec 13 00:14:57 2000 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from earth.backplane.com (placeholder-dcat-1076843399.broadbandoffice.net [64.47.83.135]) by hub.freebsd.org (Postfix) with ESMTP id 6089637B400; Wed, 13 Dec 2000 00:14:57 -0800 (PST) Received: (from dillon@localhost) by earth.backplane.com (8.11.1/8.9.3) id eBD8EvD81021; Wed, 13 Dec 2000 00:14:57 -0800 (PST) (envelope-from dillon) Date: Wed, 13 Dec 2000 00:14:57 -0800 (PST) From: Matt Dillon Message-Id: <200012130814.eBD8EvD81021@earth.backplane.com> To: "David O'Brien" Cc: freebsd-stable@FreeBSD.ORG Subject: Re: Extreme high load with 12/7 4-releng References: <200012120230.SAA32402@pathlink.net> <200012121801.KAA42878@pathlink.net> <200012122138.NAA69074@pathlink.net> <200012122231.eBCMVE353411@earth.backplane.com> <200012130209.eBD290M79194@earth.backplane.com> <20001212235344.A73861@dragon.nuxi.com> Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG :On Tue, Dec 12, 2000 at 06:09:00PM -0800, Matt Dillon wrote: :> To give you an idea on the difference in performance, running a program :> on my test box to iterate through a huge (3xMain-memory) file via mmap, :> alternately touching 8K and accessing 8K, resulted in long system stalls :> and a pidly pageout rate of maybe 2MB/sec. To disk. : :Would you be willing to post your test for people to play with if they :care to? Sure. I put my linear pageout daemon tester on my site: http://apollo.backplane.com/FreeBSD4/ It isn't very sophisticated. I need to get Paul's permission to put the filesystem thrasher / low-memory test Yahoo was using up. That test is a great deal more sophisticated. -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message