Compiling on one machine for another with more processors

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Compiling on one machine for another with more processors

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Hi all. I'm compiling a Monte Carlo simulation for deployment on other machines. I use the default parallelization settings. On my own (two processor) machine I get a significant speedup and Task Manager shows close to 100% CPU utilization. On one of the other machines (six-core) I compile *on my own machine* but changing environment variables NUMBER_OF_PROCESSORS=6 and OMP_NUM_THREADS=6. Not only do I not get any speedup, the CPU utilization level hangs around 17%, though it's distributed over two processors (per Task Manager).

Any clues here? I'm hoping I don't have to become an OpenMP expert to make use of the extra cores.

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