Running WRF: How to controll MPI-tiles versus openMP tiles

Discussions centered around methodologies for high performance computing.

Running WRF: How to controll MPI-tiles versus openMP tiles

Postby akng_wrf » Mon Mar 02, 2020 11:08 am

Hi.

I am a newbie in WRF ARM.

I am running a em_real version of WRF v4.1.3 on a Linux HPC cluster and wish to check if I can reduce the wall clock time by a hybrid "MPI tiles"+"openMP-tiles" approach ala https://www2.cisl.ucar.edu/sites/defaul ... liott.pptx slide 15. I am using a Linux cluster with 16 cores per node and Infiniband communication between the nodes.

Question: Which parameter in namelist.input I can use to control the number of MPI-tiles versus openMP-tiles?

Best regards,
Anh Kiet Nguyen
akng_wrf
 
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