|June 19, 2009, 14:12||
Join Date: Mar 2009
Posts: 17Rep Power: 8
I want to measure the efficiency of the paralleling for different mesh sizes. My problem is quite simple: a flow in a tube divided in 6 domains by METIS (the 6 processor are on the same machine). It is quite surprising for me to see that when one augments the refinement, the efficiency decreases after an optimum. I was thinking that the efficiency increases in such a case.
The efficiency is here measured as: TCPU(1) / ( 6 * TCPU(6) ), where TCPU(N) is the CPU time for parallel computations on N processors.
I thought first it was linked to the fieldTransfer=1 (fieldTransfer are inverted on the attached graph), so I change it. The results are a little closer to what expected, but I still observe the general behavior depicted above. Finally, maybe are my results normal, but I have no explanation for them. What do you think about this ?
Last edited by kassiotis; June 22, 2009 at 04:39. Reason: Add precision, correct english mistakes
|Thread||Thread Starter||Forum||Replies||Last Post|
|Efficiency for hovering flight?||Zonexo||Main CFD Forum||1||April 14, 2008 00:49|
|Pump efficiency||john||FLUENT||1||February 26, 2008 06:48|
|Collection efficiency||Jen||FLUENT||0||November 16, 2005 11:16|
|Combustion efficiency||Julie Polyakh||CD-adapco||0||July 25, 2004 02:24|
|CPU efficiency over 100% !!||X. Ye||Main CFD Forum||6||September 7, 1999 10:07|