memtester

memtester is a userspace utility for testing the memory subsystem for faults. It's portable and should compile and work on any 32- or 64-bit Unix-like system. (Yes, even weird, proprietary Unices.)

What is new in this release:

• add progress message for one more errno value (EAGAIN) in response to failed mlock; BSDs use this to indicate the lock failed due to being over a system or process limit, much like ENOMEM.

What is new in version 4.2.1:

• Fix offsets/addresses were not being reported correctly in test failure messages. Thanks: Anton Sergeev.

What is new in version 4.2.0:

• define _FILE_OFFSET_BITS to 64 by default in conf-cc, which causes some 32-bit systems with larger-than-32-bit address spaces to have a 64-bit off_t, allowing testing of larger chunks of memory. Thanks to Steven A. Falco for the suggestion. Let me know if this definition causes problems for anyone.
• add tests of 8-bit-wide and 16-bit-wide random writes, to enable verifying the correct operation of hardware. Thanks: Dick Hollenbeck. If these tests trigger unaligned access problems on your platform, you can eliminate these tests by removing the -DTEST_NARROW_WRITES definition from the conf-cc file.