On Thu, Nov 11, 2010 at 12:36, Number Cruncher <number.cruncher_at_[hidden]
> wrote:
> However as commented here:
> https://bugzilla.redhat.com/show_bug.cgi?id=638477#c86 the valgrind memcpy
> implementation is overlap-safe.
>
Yes, of course. That's how the bug in Open MPI was originally detected.
Of course you can't do production runs with valgrind.
Are you using an Intel Nehalem-class CPU?
>
No, Core 2 Duo and Opteron (but the Opterons still have older glibc).
Reverse memcpy must only be turned on for Nehalem.
Jed
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