From owner-freebsd-hackers@FreeBSD.ORG Fri Dec 10 15:02:27 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EF3F516A4CE for ; Fri, 10 Dec 2004 15:02:27 +0000 (GMT) Received: from mail.revolutionsp.com (ganymede.revolutionsp.com [64.246.0.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id 84F9343D4C for ; Fri, 10 Dec 2004 15:02:27 +0000 (GMT) (envelope-from klr@6s-gaming.com) Received: from mail.revolutionsp.com (localhost [127.0.0.1]) by mail.revolutionsp.com (Postfix) with ESMTP id 3302315C96 for ; Fri, 10 Dec 2004 05:58:06 -0600 (CST) Received: from 194.210.13.66 (SquirrelMail authenticated user klr@6s-gaming.com); by mail.revolutionsp.com with HTTP; Fri, 10 Dec 2004 05:58:06 -0600 (CST) Message-ID: <36627.194.210.13.66.1102679886.squirrel@194.210.13.66> Date: Fri, 10 Dec 2004 05:58:06 -0600 (CST) From: klr@6s-gaming.com To: freebsd-hackers@FreeBSD.org User-Agent: SquirrelMail/1.4.3a X-Mailer: SquirrelMail/1.4.3a MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal Subject: HTT/SMP servers instability on 5.3-STABLE X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Dec 2004 15:02:28 -0000 Hi, I have a Dual Xeon 2.4 and a Dual Xeon 2.8 servers running with HyperThreading, ACPI, and SMP enabled. The 2.8 server won't stand for more than 5 days without crashing, and the 2.4 server was up 30 days crashed, now was up 12 days, and crashed. I didn't have a debugging kernel, I'll be building one when the datacenter reboots the server. I also don't have any panic messages.. I have, however, a few questions: - machdep.cpu_idle_hlt - I've seen a lot on google about this sysctl, but still don't fully understand it. What does this sysctl really changes? - HyperThreading - Do I really have a performance increase with HTT turned on? I've heard it can penalize performance because the scheduler isn't optimized for logical CPUs. Does having HTT enabled impacts the stability of the system? - ACPI - I'll be disabling ACPI along with HTT to see if the server doesn't crash for awhile. Is ACPI on 5.3-STABLE (around November 1st, it was pre-release) still a problem? Last but not the least, my 5.3-STABLE version is from a few days before the release. Since I had created a few jails by then, I didn't upgrade the system to use the -RELEASE. Was there any last-standing problem a few days before the release that could be causing my instability problems? Please share some common dual processor system knowledge, perhaps I'm missing something really obvious and making these servers unstable. Regards, Hugo