Intel MPI 2019+ release_mt library

To get the release_mt library to run with EAGLE_25/.1 the following environment settings seem to work:

  FI_OFI_RXM_RX_SIZE=4096
  FI_OFI_RXM_TX_SIZE=4096
  FI_UNIVERSE_SIZE=2048

The question now is does it speed up our communications.

Other useful things to know. To use the release_mt library you need to source the Intel setup scripts after loading the module (intel_2019/update-4 also now intel_2020/update-1):

source $I_MPI_ROOT/intel64/bin/mpivars.sh release_mt

and to use an asynchronous progression thread:

  I_MPI_ASYNC_PROGRESS=1
  I_MPI_ASYNC_PROGRESS_THREADS=1

You can use more, but they should really be assigned to different communicators.