[Beowulf] AMD Opteron Linpack Benchmark

[Lai Dragonfly]

Dear all,

I'm doing the HPL benchmark on several nodes of AMD opteron platform but may
expand to hundred of nodes later.
i hope to get around 80% efficiency.
Anyone has good suggestions of combination of compiler (appreciate if
includes compiler flags) + math lib on AMD platforms?
thanks a lot.

PN
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