Messages in this thread | | | Subject | Re: [Question] How to test (DRAM) memory location. | From | Calvin Walton <> | Date | Mon, 30 Aug 2010 20:57:49 -0400 |
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On Sat, 2010-08-28 at 16:57 +0530, santosh wrote: > Hi, > > I need to write a memory diagnosis program which will test each and > every location of SDRAM > to know whether its working properly or a bad location > > What would be the best approach ??
If you can, it's best to just use code other people have already written :)
If you can reboot the computer to test the memory, Memtest86+ is a well-known and very reliable tool which does just what you ask. You can obtain it from http://www.memtest.org/
There's some work done on an in-kernel memory tester, but testing memory while Linux is running is somewhat limited as there are sections of memory that you can't overwrite during testing. Take a look at CONFIG_MEMTEST and arch/x86/mm/memtest.c (which is currently only capable of testing memory in early boot).
-- Calvin Walton <calvin.walton@gmail.com>
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