[Beowulf] General thoughts on Xeon 56xx versus E5 series?

[holway at th.physik.uni-frankfurt.de]

> Any general thought out there on Xeon 56xx versus E5 performance wise?

We were comparing the performance of an older AMD with a newer AMD a while
ago and found that the newer AMDs floating point performance was
significantly reduced.

It turned out that the kernel did not yet support AVX or FMA4 or some
other new fancy bit of register blah blah so it reverted to some
compatibility support for floating point operations. (I am not a kernel
dev :)

If your going to play with newer processors you have to make sure your
kernel supports all the functions of that CPU. Kernel development can be a
little way behind on mainstream releases.

Ta,

Andrew


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