Parallelization efficiency.. -- CFD Online Discussion Forums

January 1, 2000, 06:46	Parallelization efficiency..	#1
karthik Guest Posts: n/a	Hi all, I am doing explicit unstructured Finite Volume CFD on a 24 node message passing parallel computer. I am getting efficiencies of more than 100% (around 115%) when using 2 & 4 nodes. The problem size is relatively small (< 7 MB per node) comapared to the available memory (30 MB per node). Can anyone attribute reasons towards this?. Also, the efficiency is always maximum when i'm using 4 nodes. I have run codes for 4 different levels of grid and 'am consistently getting the same numbers. Note: eff = time on 1 proc / (n * time on n proc) time : time per iteration.

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