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Pinning the processors in cluster to run a solver |
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Sravan Kumar
Join Date: May 2014
Posts: 57
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I am running my openFoam cases in a cluster.
Previously I used to run them on single node. Following is the code used to run ( from user guide ) Code:
mpirun -pinexpr S0:0-9@S1:0-9 -np 20 simpleFoam -parallel S0,S1 are the two sockets and 0-9 represents 10 physical processors in the socket ( pinning is done using the LIKWID tool ) However I want to run simulation with finer mesh and one node is taking lot time. Hence I want to run it on more than one node. Following are my questions: 1) How to pin the threads if I am running in more than two nodes. ( say 40 physical processsors in 2 nodes ) 2) If I dont do pinning and I just run on one node ( 20 cores ) using following Code:
mpirun -np 20 simpleFoam -parallel |
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