From owner-freebsd-stable@FreeBSD.ORG Mon Nov 28 21:53:34 2005 Return-Path: X-Original-To: stable@freebsd.org Delivered-To: freebsd-stable@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D8A0C16A41F for ; Mon, 28 Nov 2005 21:53:34 +0000 (GMT) (envelope-from ltning@anduin.net) Received: from anduin.net (anduin.net [212.12.46.226]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2448343D49 for ; Mon, 28 Nov 2005 21:53:33 +0000 (GMT) (envelope-from ltning@anduin.net) Received: from ranger.anduin.net ([81.0.162.52] helo=[192.168.1.112]) by anduin.net with esmtpa (Exim 4.50 (FreeBSD)) id 1EgqwF-0002Je-Ds; Mon, 28 Nov 2005 22:53:31 +0100 In-Reply-To: <20051128211440.GB28963@xor.obsecurity.org> References: <93F6B911-8C64-4F5C-81F9-80EC271ED298@anduin.net> <84dead720511280545v2bc0bc35jd107da06b9a788cb@mail.gmail.com> <20187843-76FC-4EAB-AFF8-7493FB0C0077@anduin.net> <84dead720511280654j138635abgcb9cc0978e6c26b7@mail.gmail.com> <02757598-222D-408E-8B33-C2EE1E6E426E@anduin.net> <20051128211440.GB28963@xor.obsecurity.org> Mime-Version: 1.0 (Apple Message framework v746.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <3A601A32-94D1-49F6-AB06-ED54D50D4B6A@anduin.net> Content-Transfer-Encoding: 7bit From: =?ISO-8859-1?Q?Eirik_=D8verby?= Date: Mon, 28 Nov 2005 22:53:00 +0100 To: Kris Kennaway X-Mailer: Apple Mail (2.746.2) Cc: stable@freebsd.org, Joseph Koshy Subject: Re: Reduced java/tomcat performance 6-beta3 -> 6-stable ? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Nov 2005 21:53:35 -0000 Firmware versions are equal. BIOS settings are equal. However, a diff of the dmesgs show (apart from MAC address differences): 30c30 < Timecounter "ACPI-safe" frequency 3579545 Hz quality 1000 --- > Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 What on earth is that all about? The "slow" box has the ACPI-fast timecounter... /Eirik On Nov 28, 2005, at 22:14 , Kris Kennaway wrote: > On Mon, Nov 28, 2005 at 09:54:30PM +0100, Eirik ?verby wrote: >> Hi, >> >> I think I have found the culprit. There must be some sort of >> difference between the machines after all (BIOS revision?), because >> while on one machine the interrupt rate for the bge card stays very >> low (2 to be exact) during maximum load, the other machine goes >> beyond 1000 and keeps rising constantly. This might also explain why >> performance slowly degrades over time on that machine, and response >> times vary wildly, while the "fast" machine responds nicely within >> 1-2 seconds no matter the load and testing time. >> >> I will have to investigate this more closely. Is there a way to force >> the NIC to polling mode (I'm assuming that is the difference, an IRQ >> rate of 2 is too low for a heavily loaded server if the NIC is >> interrupt-driven)? >> >> Anything else I could look at? > > BIOS update. > > Kris