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  From: Mark Pulford <mark@kyne.com.au>
  To  : Paul OBrien <paulob@bold.net.au>
  Date: Fri, 27 Nov 1998 10:58:10 +1030 (CST)

Re: Memory Fault ?? maybe

On Fri, 27 Nov 1998, Paul OBrien wrote:

> Does anyone have access to a memory tester or is there some thing I can run
> in Linux that will test RAM memory thoroughly.

There is a memory tester on sunsite called "memtest", you could try that.
However, I haven't come across a memory tester which will pick up faults
better than a kernel compile.

#!/bin/bash
cd /usr/src/linux
for I in 0 1 2 3 4 5 6 7 8 9
do
  for J in 0 1 2 3 4 5 6 7 8 9
  do
    ( make dep && make clean &&
      make zImage && make modules ) >& /tmp/log.$I$J
  done
done

Let that run overnight and then check to see if there are any differences
in the sizes of the log files. All the log files should be exactly the
same. Have a look at the smaller files and you will find the compile died
in an odd way.

I've used this several times to comfirm bad ram (and cache). Ordinary
memory testers never found any errors.

Regards,
Mark


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