Performance comparison for OpenMP, PThreads and MPI Hot Plate
Performance comparison for OpenMP, PThreads and MPI Hot Plate
Performance comparison for OpenMP, PThreads and MPI Hot Plate
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It is clear that <strong>MPI</strong> implementation shows a rather better per<strong>for</strong>mance than <strong>OpenMP</strong> or <strong>PThreads</strong>. <strong>MPI</strong><br />
also seems to scale significantly better, with almost linear time/processors correspondence. Speedup is<br />
not superlinear because horizontal scale is logarithmic.<br />
Conclusion.<br />
The experiment clearly demonstrated that <strong>MPI</strong> implementation of hot plate per<strong>for</strong>ms much faster than<br />
<strong>OpenMP</strong> or <strong>PThreads</strong>. Apparently, thread spawning/joining overhead adversely affects overall<br />
per<strong>for</strong>mance, while <strong>MPI</strong>'s reduce <strong>and</strong> interprocess communication proceeds much faster. One thing to<br />
note is that since number of processors used (16) is negligible compared to overall problem size<br />
(768x768), amount of direct interprocess communication is not high compared to the time spent on
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