VM interference with AVX2?
Note to Crazy Operations Guy: the Intel compilers already support AVX2.
However. I have experience running the WRF meteorology model on the previous-edition SandyBridge cores, and found that the performance increment from using the SandyBridge AVX instruction set (as opposed to the Nehalem SSE4.2) was negligible. This is as opposed to "real" hardware, where AVX gives WRF a 30% boos over SSE4.2 on SandyBridge, and where it gives a 70% boost to well-coded computational fluid dynamics apps. Given the Amazon VM environment, I still have the question: does Haswell-EP help _in_this_VM_environment_ ??