[Gllug] CPU exerciser?

[John Hearns]

Does anyone know of such a thing as a CPU exerciser code?
ie. something which makes the CPU execute all instructions in turn.
I'm thinking along the lines of Memtest, which we use extensively.

I have an Opteron CPU which is problematic. When running the HPL 
benchmark it quickly freezes - no indication on the console.
I guess it is hitting an instruction which has a hardware fault on the
CPU or something.
It would be interesting to diagnose this (prior to swapping the CPU out
of course). Dual CPU box.



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