Date: Sat, 06 Feb 2010 05:38:25 -0500 From: Michael Powell <nightrecon@hotmail.com> To: freebsd-questions@freebsd.org Subject: Re: amd64: Fatal Trap 12 in high load situations Message-ID: <hkjgr6$vpm$1@ger.gmane.org> References: <201002061017.05737.ms80@dynamik.sytes.net>
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ms80 wrote: > Hi > > I have a problem installing / upgrading FreeBSD 8.0-release on a new > machine. > > The computers specs are: > > cpu: AMD Phenom II X4 > board: Gigabyte MA790GPT-UD3H > ram: 4x2GBytes DDR3/1333 > hdd: 2xMaxtor STM31000528AS > nic: 4x Intel(R) PRO/1000 [snip] > > > So here are my questions: > 1. Are there any known caveats or quirks regarding my hardware? > 2. What can I do to further investigate this issue > 3. Not fully on topic but might be related: The buildsystem recognizes my > cpu as "686 class cpu" wich is wrong. Are there any switches I can set in > make.conf to have 'make' use the correct values? Currently I'm using a > blank make.conf, meaning it is not present (as it is by default on a fresh > installed system). > [snip] I am using this motherboard with an AMD x4 630 Propus cpu and 4G Ram (2x2GB). I have done a basic overclock to 3.36GHz with the ram running at 1600MHz. This is my KDE4 desktop machine running FreeBSD 8 and all ports currently up to date. When selecting the RAM to put on this motherboard you should have consulted the list from Gigabyte for approved memory and chosen very carefully. The memory I actually have was not an exact line item from the list, but it was something extremely close and which was designed and manufactured for use with an AM3 socket motherboard. You will notice that some RAM today is designed for Intel P55 chipsets and Lynnfield processors while other RAM is designed specifically for AM3/AM2 socket use. It is probably not a good idea to disregard this during selection, e.g. memory not specifically meant for AM3 socket mobos may not function correctly. I also seem to recall seeing somewhere that this motherboard acquires limitations in overclocking when all 4 sockets are filled and the best overclocking results when only 2 sockets are in use. I am only using 2 sockets in a 2x2GB arrangement for 4GB RAM total. If you are not overclocking and have all 4 sockets filled you may not be able to go above 1066MHz memory multiplier. With only 2 sockets populated 1333MHz should be attainable. I believe your problem centers around memory. It may not be designed for AM3 socket and/or may not be able to handle a higher memory multiplier. When I first put this motherboard in I attempted to boot from an already installed OS with the memory multiplier set too high and saw numerous examples similar to what you are describing. Since I had bought 1600MHz memory I mistakenly set the multiplier too high. When I set it back to 1333MHz everything was fine. Either the memory multiplier is set too high for your RAM or it is just the wrong RAM to begin with. As far as make.conf goes I use: CPUTYPE?= k8 -Mike
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