Proper process distribution for parallel transfer benchmarks? about mpi-benchmarks

[a-v-medvedev]

Ah I found the npmin option - but map seems a better option here. Any suggestions on how to use it for the above case?

Just leaving a note on -map usage. To understand better the idea behind -map and the way it can be used to measure the inter-node communications only, one may check out Examples in section "-map PxQ Option" from here: https://software.intel.com/content/www/us/en/develop/documentation/imb-user-guide/top/benchmark-methodology/command-line-control.html

Also -npmin is typically used all the time for every IMB run to eliminate these np=2,4,... executions.

[sjpb]

Ah I found the npmin option - but map seems a better option here. Any suggestions on how to use it for the above case?

[VinnitskiV]

Hi @sjpb
You can find more information about map option using:
IMB-MPI1 -help map
In your case i assume you need to use next option:
IMB-MPI uniband -map COUNT_RANKS_PER_NODExCOUNT_NODES