Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263018AbVDBCce (ORCPT ); Fri, 1 Apr 2005 21:32:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263017AbVDBCce (ORCPT ); Fri, 1 Apr 2005 21:32:34 -0500 Received: from shawidc-mo1.cg.shawcable.net ([24.71.223.10]:57051 "EHLO pd2mo2so.prod.shaw.ca") by vger.kernel.org with ESMTP id S263015AbVDBCcR (ORCPT ); Fri, 1 Apr 2005 21:32:17 -0500 Date: Fri, 01 Apr 2005 20:32:04 -0600 From: Robert Hancock Subject: Re: AMD64 Machine hardlocks when using memset In-reply-to: <3Oy8m-74-15@gated-at.bofh.it> To: linux-kernel Message-id: <424E0424.7080308@shaw.ca> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7bit X-Accept-Language: en-us, en References: <3NZDp-4yY-7@gated-at.bofh.it> <3OmgF-6HV-17@gated-at.bofh.it> <3OmgF-6HV-15@gated-at.bofh.it> <3Oy8m-74-15@gated-at.bofh.it> User-Agent: Mozilla Thunderbird 1.0.2 (Windows/20050317) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1449 Lines: 34 Ray Lee wrote: > On Thu, 2005-03-31 at 22:37 -0600, Robert Hancock wrote: > >>This is getting pretty ridiculous.. I've tried memory timings down to >>the slowest possible, ran Memtest86 for 4 passes with no errors, and >>it's been stable in Windows for a few months now. Still something is >>blowing up in Linux with this test though.. > > > Have you run the same memset test under windows? > > I've traced a lot of oddball problems down to bad or marginal power > supplies. I've now built a similar test program for Windows. I've let it run over 2000 iterations of 512MB memsets with no problems. On Linux it usually blew up with under 200 iterations. It does run visibly slower than the Linux version though - this is after all 32 bit Windows and it was compiled with crufty old Visual C++ 6.0 so it is probably not that optimized for this CPU. I will see if I can get a more optimized build of this to try in Mingw32 or something.. after all if it's related to some instruction combination or something it may not show up in the build I have. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/