Memory mapped files g++ vs icc

Memory mapped files g++ vs icc

The single application I have written which performs better when compiled with g++ than with icc makes heavy use of memory mapped files. Does anyone know why the intel version should be slow, or any tips for optimizing memory mapped files on linux??


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It would be hard to make a generic comparison without knowing the details.
You could watch for alignments, see if the footprint is making the app spill over. I am curious to hear details as you get these...


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