PREFETCH Directive and MM_PREFETCH Intrinsic

Intel® Fortran Compiler

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PREFETCH Directive and MM_PREFETCH Intrinsic

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Hi every one.

For performance issues I want to make Intel Fortran compiler transfer an array range from main memory to L1 or L2 cache. In order to do that I tried !dec$ prefetch directive and mm_prefetch intrinsic function with several different parameters while the Prefetch Insertion option was enabled in the Visual Studio's Optimization tab. But unfortunately neither of them affects the cpu time. Besides I tried those features on both Intel and AMD CPUs but there was no difference between the results.

Can anyone help me in this topic?

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