On May 14, 2010, at 1:29 PM, Jonathan Hodges wrote:
The problem is that the performance is worse with 4 cores than it is with one core. For example, running the holey-wvg-cavity.ctl example takes 27s and 76s with 1 and 4 cores, respectively.
In order to benefit from multiple processors, the problem needs to be sufficiently large for the computational savings to outweigh the increased inter-processor communication. The holey-wvg-cavity example file is probably too small to benefit.
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