From owner-freebsd-smp Tue Jul 31 16: 2: 4 2001 Delivered-To: freebsd-smp@freebsd.org Received: from revolt.poohsticks.org (revolt.poohsticks.org [63.227.60.74]) by hub.freebsd.org (Postfix) with ESMTP id D19EF37B401 for ; Tue, 31 Jul 2001 16:02:00 -0700 (PDT) (envelope-from drew@revolt.poohsticks.org) Received: from revolt.poohsticks.org (localhost [127.0.0.1]) by revolt.poohsticks.org (8.11.3/8.11.3) with ESMTP id f6VN1wd38295; Tue, 31 Jul 2001 17:01:58 -0600 (MDT) (envelope-from drew@revolt.poohsticks.org) Message-Id: <200107312301.f6VN1wd38295@revolt.poohsticks.org> To: Charles Randall Cc: "smp@freebsd.org" Subject: Re: Dell 1550 SMP crash In-reply-to: Your message of "Tue, 31 Jul 2001 16:16:07 MDT." <5FE9B713CCCDD311A03400508B8B30130828F20A@bdr-xcln.corp.matchlogic.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <38292.996620518.1@revolt.poohsticks.org> Date: Tue, 31 Jul 2001 17:01:58 -0600 From: Drew Eckhardt Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org >Searching the archives for "type 29", this looks like a problem that James >FitzGibbon reported in May 2000 with a Dell PowerEdge 2450. Drew Eckhardt >posted a response and then the thread basically died. I had some headaches with frequent (I couldn't do a parallel make buildworld) unexplained T_RESESVEDs and looked at several possibilities: 1. The SIMD instruction fault. This wasn't happening. 2. One of the other 32 CPU traps which is allegedly still reserved. This wasn't happening. 3. Something generated by the APIC. Explicitly initializing the unused APIC pins eliminated most but not all of these (every week or so it might crash), suggesting that some form of hardware problem may be responsible. The simplest sometimes working solutions to hardware problems are 1. Unplugging and replugging things 2. Swapping parts So I unplugged and swapped my two Slot-1 PIII 600E processors and found that the problem stopped entirely. -- Home Page For those who do, no explanation is necessary. For those who don't, no explanation is possible. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message