From owner-freebsd-current@FreeBSD.ORG Thu Dec 11 23:25:53 2003 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3AA4F16A4CF for ; Thu, 11 Dec 2003 23:25:53 -0800 (PST) Received: from hex.athame.co.uk (guru164.netsonic.fi [194.29.193.164]) by mx1.FreeBSD.org (Postfix) with ESMTP id B3A0A43D33 for ; Thu, 11 Dec 2003 23:25:51 -0800 (PST) (envelope-from andy@athame.co.uk) Received: from hex.int.athame.co.uk ([192.168.1.1] helo=localhost.localdomain) by hex.athame.co.uk with esmtp (Exim 4.24; FreeBSD 5.1) id 1AUhgM-000DFd-38; Fri, 12 Dec 2003 09:25:50 +0200 From: Andy Fawcett To: Scott Likens , current@freebsd.org Date: Fri, 12 Dec 2003 09:25:42 +0200 User-Agent: KMail/1.5.4 References: <1071211621.8839.2.camel@desolation.livid.de> In-Reply-To: <1071211621.8839.2.camel@desolation.livid.de> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200312120925.42138.andy@athame.co.uk> Subject: Re: Observational notice... X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Dec 2003 07:25:53 -0000 On Friday 12 December 2003 8:47 am, Scott Likens wrote: > I've been observing my 5.2-RC box lately and it's running _ALOT_ > slower then it has previously. > > It has no ACPI throttling support, and quite frankly this is annoying > me, my ubench marks have gone down over 3000 points. > > Granted this is a SMP machine, with or without ULE (using 4BSD) it > makes no difference. > > it's like a slug on wheels. > > Has anyone else observed this? or is this a unique situation? > > This is a dual P2-450 with 1gig of Ecc (Xeon processor's) > > It's not exactly the greatest thing on the market, but I need it to > work properly and this isn't good. > > any hints? i've read the thread on acpi throttling, but I don't > believe I fall into that catagory due to the age of the cpu. This sounds similar to what I was seeing on my P2-400 SMP box. Check "vmstat -i" to see if you have a massive amount of interrupts going on (mine were on IRC20, at a rate of about 45K). I managed to "fix" this by applying the patch at http://www.FreeBSD.org/~jhb/patches/acpi_irq.patch and rebuilding/installing the kernel. No more spurious interrupts, and performance is about the same as I used to have with 5.1R. I have no idea if this patch has any side-effects, so at the moment I am treating it with extreme caution. Of course, your problem could be totally different, and all this from me could be hot air :) A. -- Andy Fawcett | andy@athame.co.uk | tap@kde.org "In an open world without walls and fences, | tap@lspace.org we wouldn't need Windows and Gates." -- anon | tap@fruitsalad.org