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Programming for multicore: An introduction to OpenMP using GCC-4.4

Jun 02, 2009, 20:33 (0 Talkback[s])

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"Jargonspeak calls it 'platform independent shared memory multiprocessing'. In effect, it's threads without the associated headache of thread management. By the way, gcc has supported OpenMP way back from version 4.2. So, you don't need the latest bleeding edge version for this. However, should you want to, on Windows you can always download the excellent TDM MingW builds for gcc-4.4.0 (latest direct link). If you're a Linux geek, you probably know how to get gcc-4.4 for your distro anyway. Also, Microsoft Visual C++ Express does not include/support OpenMP - hence my experiments are limited to gcc on both Win and Lin.

"All right then, let's see how OpenMP aids a classic case of parallelization: matrix multiplication. Agreed - this is a rather simple programming problem, and real world problems are usually harder to parallelize than this. However, this should serve as a good starting point to explore further."

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