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??

Thanks,
Ben

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For more complete information about compiler optimizations, see our Optimization Notice.

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...

Thanks,
Ganesh

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