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First of all using this equation requires a significant number of
terms to compute the value of
, at least 3092300000 terms in
this series. By adjusting the block size or the chunk of work the
amount of communication is reduced an the efficiency stays acceptable
through using 8 nodes with the large chunk size, with a block size of
1000000 or greater. Also The efficiency is marginal using any chosen
block size at 1000000 or above and 16 or 24 nodes. With a small block
size of 100000 the application can only effectively use 4 processors.
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Ricky A. Kendall
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