Please excuse my ignorance. I am using IVF with OMP, and planning to create executables for Linux and Mac OSX in order to distribute my program. I haven't yet tried building on Linux or OSX, but I've spoken to a colleague with a Mac, and apparently he has found that while his code gets a good speedup with OMP on Linux, the Mac performance is much inferior.
Should there be a performance difference between Linux and OSX? I would have expected the two to behave in very similar ways (of course, he might be doing something wrong). Are there any particular issues I should be aware of when porting my code to the different OS versions of ifort?