SU2 python scipt runs in parallel but repeats the simulation

topheruk29 · August 10, 2018, 19:42

If I use the python library to call SU2 and run in parallel, the simulation runs to completion but then repeats the simulation x-number of times, where I think x is equal to the number of processors. Also the run times reported are for the number of processors specified. The issue can be repeated with the following python script:

config = SU2.io.Config(filename)
config.NUMBER_PART = 4 # 0 for serial
config.NZONES = 1
SU2.run.CFD(config)

However, the simulation works in parallel as expected if I use the terminal commands:

mpirun -n 4 SU2_CFD filename.cfg

Any ideas?

*UPDATE1*: issue partly resolved, the parallel_computation.py scipt in the SU2_PY directory ran the simulation in parallel without repeating. Still not sure why the above python script does not work, however.
*UPDATE2*: issue fully resolved, I was calling SU2.eval.func('DRAG', config), SU2.eval.func('LIFT', config), and SU2.eval.func('MOMENT', config) in addition to SU2.run.CFD(config)

hlk · August 13, 2018, 19:01

Hello
Thanks for your interest in SU2
I'm glad to hear you got your problem working.

August 10, 2018, 19:42	SU2 python scipt runs in parallel but repeats the simulation	#1
topheruk29 New Member topheruk Join Date: Mar 2018 Posts: 5 Rep Power: 9	If I use the python library to call SU2 and run in parallel, the simulation runs to completion but then repeats the simulation x-number of times, where I think x is equal to the number of processors. Also the run times reported are for the number of processors specified. The issue can be repeated with the following python script: config = SU2.io.Config(filename) config.NUMBER_PART = 4 # 0 for serial config.NZONES = 1 SU2.run.CFD(config) However, the simulation works in parallel as expected if I use the terminal commands: mpirun -n 4 SU2_CFD filename.cfg Any ideas? UPDATE1: issue partly resolved, the parallel_computation.py scipt in the SU2_PY directory ran the simulation in parallel without repeating. Still not sure why the above python script does not work, however. UPDATE2: issue fully resolved, I was calling SU2.eval.func('DRAG', config), SU2.eval.func('LIFT', config), and SU2.eval.func('MOMENT', config) in addition to SU2.run.CFD(config) Last edited by topheruk29; August 10, 2018 at 21:45.

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August 13, 2018, 19:01		#2
hlk Senior Member Heather Kline Join Date: Jun 2013 Posts: 309 Rep Power: 15	Hello Thanks for your interest in SU2 I'm glad to hear you got your problem working.