From owner-freebsd-stable@FreeBSD.ORG Thu Jan 6 13:35:43 2005 Return-Path: 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 5BC4916A4CE for ; Thu, 6 Jan 2005 13:35:43 +0000 (GMT) Received: from fledge.watson.org (fledge.watson.org [204.156.12.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id F269143D1D for ; Thu, 6 Jan 2005 13:35:42 +0000 (GMT) (envelope-from robert@fledge.watson.org) Received: from fledge.watson.org (localhost [127.0.0.1]) by fledge.watson.org (8.13.1/8.13.1) with ESMTP id j06DVwNZ096012; Thu, 6 Jan 2005 08:31:58 -0500 (EST) (envelope-from robert@fledge.watson.org) Received: from localhost (robert@localhost)j06DVvnY096009; Thu, 6 Jan 2005 13:31:58 GMT (envelope-from robert@fledge.watson.org) Date: Thu, 6 Jan 2005 13:31:57 +0000 (GMT) From: Robert Watson X-Sender: robert@fledge.watson.org To: Mike Tancsa In-Reply-To: <6.2.0.14.0.20050106001244.04b5abc8@64.7.153.2> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: Mitch Parks cc: freebsd-stable@freebsd.org Subject: Re: unstable 5.3 boxes X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 06 Jan 2005 13:35:43 -0000 On Thu, 6 Jan 2005, Mike Tancsa wrote: > At 06:29 PM 05/01/2005, Mitch Parks wrote: > >It seems both my test and production boxes are not stable with > >5.3-Release. I'm hoping for some insight in how to make at least the > >production box not crash. > >The crashes have been at different times of the day and I've found no > >suspicious log activity. At the moment it's been 9 days since the last > >crash, but it has also crashed in less than a day. ACPI and HT have always > >been enabled on this box without problems. > > I would update to RELENG_5 and disable in the BIOS HTT. HTT for the > most part works against you with the current scheduler and seems to add > more instability. But there have been quite a few fixes in RELENG_5 > that you might benefit from. FYI, I had something of an odd surprise recently (about two weeks ago) when I re-benchmarked MySQL between HTT and non-HTT on a dual Xeon and got a faster result with HTT on 6.x-CURRENT. I've not yet investigated sufficiently to figure out why I got that result, or if it's a consistent result. It may be the product of recent libpthread changes but I hope to investigate further in a couple of weeks. There was a slight regression in the normal SMP numbers (maybe a couple of percent) but a massive improvement in HTT... My first goal will be to identify the source of the SMP regression, the second to confirm and reason about the HTT change. Robert N M Watson