[Beowulf] Not quite Walmart, or, living without ECC?

David Mathog mathog at caltech.edu
Thu Nov 29 11:11:37 PST 2007

By the way, have any of those instances where another program detects
memory problems, but memtest86+ doesn't, been on machines where each
CPU has its own memory which is not directly available to the other

It is well known that memtest86+, at least the current version,
only runs on one CPU, and that it cannot test memory local to other
CPUs.  See for instance:


If this is the case it isn't necessarily true that these other programs
are somehow "harder on memory" than memtest86+, just that they see
all of the memory in the system, and memtest86+ doesn't.

David Mathog
mathog at caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech

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