testmyram -- Simple RAM testing program https://github.com/rhomann/testmyram

Copyright (C) 2011 Robert Homann <homann [at] bury dot com>

The testmyram program is published under the terms of the GNU General Public License Version 2.0 (or any later version), GNU GPL for short. See the file COPYING distributed with this package for the license terms.

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This program is a rather simple, yet effective test program for detecting stability problems with your system's RAM. It is mainly targeted at small, possibly MMU-less, systems which suffer from memory fragmentation and on which better alternatives such as "Memtest86+" (http://www.memtest.org/) or "stress" (http://weather.ou.edu/~apw/projects/stress/) are not available.

The testmyram program allocates memory in multiple blocks of fixed, user-defined size in order to defeat the effect of memory fragmentation. In each iteration, these blocks are filled with a sequence of pseudorandom bits (unlike other program that fill memory with a single bit pattern, typically of 32 bits length). After writing, and possibly after a user-defined delay (bit fade test), the same sequence of pseudorandom bits is generated again and compared with the content of the memory, possibly multiple times.

The test may be started using multiple threads so to add a bit more stress to the system.

Example:

$ testmyram -s 524288 -n 20 -j 2 -d 3600 -r 5 -v

This command starts two jobs, both allocating 20 blocks of size 0.5 MiB each (for a total size of 20 MiB), fills these blocks with pseudorandom bits, and checks their correctness five times in a row, while waiting one hour before each read iteration. The program will run infinitely until interrupted.

See the output of testmyram -h for complete usage information.