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Different results between 3 processors simulation and 7 processors simulation |
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August 27, 2012, 04:26 |
Different results between 3 processors simulation and 7 processors simulation
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#1 |
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fairus
Join Date: Apr 2010
Posts: 20
Rep Power: 15 |
Dear all,
I added the following line in parcel.C file. (after the last line of updateParcelProperties member function) Info << " d() = " << d() << endl; Then I run dieselFoam with 3 decompositions and got the following output in log file: Evolving SprayHowever, when I run with 7 decompositions I got the following: Evolving SprayThe lines with "d()" is not shown any more in 7 processors simulation. Any idea why this happened? Fairus |
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August 27, 2012, 05:07 |
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#2 |
New Member
fairus
Join Date: Apr 2010
Posts: 20
Rep Power: 15 |
Just figured out that I supposed to use "Pout" instead of "Info" to get output from each processor. Now, for 3 processors, I got the following:
Evolving SprayAnd I got the following with 7 processors: Evolving SprayApparently, 3 processors decomposition employs a serial calculation for lagrangian particle tracking and 7 processors decomposition employs 2 processors for lagrangian particle tracking. That's why "Info" works for 3 processors decomposition and not for 7 processors decomposition (please correct me if I'm wrong). Good lesson on Monday morning . Fairus |
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