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Scaling for equal grid dimensions
We begin by investigating the scaling of the code for grids of equal
dimension, i.e where jpni = jpnj. This restricts us to
a relatively small number of processors counts ranging from 64 (8x8)
to 1024 (32x32). The PathScale compiler is used for processor counts
less than 96. The results are shown in figure 3.
Figure 3:
Performance of NEMO when 
for the PGI and PathScale
compiler suites.
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From figure 3 it is clear that the PGI compiler
performs slightly better (a few percent) than the PathScale compiler.
