Methods of improving efficiency

saj216 · June 5, 2020, 06:35

Hello guys,

Are there methods for determining what affects the code of the solver which results in slow execution time. It is a transient solver, modified interThermalPhaseChangeFoam.

wangsen992 · June 6, 2020, 20:32

Use a profiler

saj216 · June 7, 2020, 05:18

Hello wangsen,

Thanks for the reply. Can you expand on how to achieve this. Information seems to be limited to this

https://openfoamwiki.net/index.php/HowTo_Profiling

wangsen992 · June 7, 2020, 21:17

Hi Sam,

Profiling is kind of a general programming issue. Basically, you want to first have a C/C++ profiler that works on your operating system (depends on whether you use windows, mac or linux). Note here that if you run with single-thread, then a general profiler works. But if you want to profile the performance while running parallel cases, you should use a profiler supporting MPI, which from my experience only has proprietary ones.

Cheers,
Sen

klausb · June 12, 2020, 16:11

Maybe SCORE-P works for you:

Internet: https://www.vi-hps.org/projects/score-p

OpenFOAM setup: https://trac.version.fz-juelich.de/v.../config_ScoreP

Klaus

saj216 · June 12, 2020, 16:13

Thanks Klaus,

I'll try it out.

Sam

June 5, 2020, 06:35	Methods of improving efficiency	#1
saj216 Member Sam Join Date: May 2019 Posts: 64 Rep Power: 6	Hello guys, Are there methods for determining what affects the code of the solver which results in slow execution time. It is a transient solver, modified interThermalPhaseChangeFoam.

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June 6, 2020, 20:32		#2
wangsen992 New Member Sen Wang Join Date: Jul 2018 Location: Singapore / Notre Dame, U.S. Posts: 19 Blog Entries: 1 Rep Power: 7	Use a profiler

June 7, 2020, 05:18		#3
saj216 Member Sam Join Date: May 2019 Posts: 64 Rep Power: 6	Hello wangsen, Thanks for the reply. Can you expand on how to achieve this. Information seems to be limited to this https://openfoamwiki.net/index.php/HowTo_Profiling

June 7, 2020, 21:17		#4
wangsen992 New Member Sen Wang Join Date: Jul 2018 Location: Singapore / Notre Dame, U.S. Posts: 19 Blog Entries: 1 Rep Power: 7	Hi Sam, Profiling is kind of a general programming issue. Basically, you want to first have a C/C++ profiler that works on your operating system (depends on whether you use windows, mac or linux). Note here that if you run with single-thread, then a general profiler works. But if you want to profile the performance while running parallel cases, you should use a profiler supporting MPI, which from my experience only has proprietary ones. Cheers, Sen

June 12, 2020, 16:11		#5
klausb Senior Member Klaus Join Date: Mar 2009 Posts: 250 Rep Power: 22	Maybe SCORE-P works for you: Internet: https://www.vi-hps.org/projects/score-p OpenFOAM setup: https://trac.version.fz-juelich.de/v.../config_ScoreP Klaus

June 12, 2020, 16:13		#6
saj216 Member Sam Join Date: May 2019 Posts: 64 Rep Power: 6	Thanks Klaus, I'll try it out. Sam