MPICH Installation with UCX

UCX is supported in MPICH 3.3 and higher versions. UCX is already embedded in the MPICH tarball, so you do not need to separately download UCX.

1. Download mpich-3.3 or higher from https://www.mpich.org

2. Configure with UCX:

$ mkdir build
$ cd build
$ ../configure --prefix=/your_install_path/ --with-device=ch4:ucx

3. Build:

$ make
$ make install

Running MPICH with UCX

Example of the command line (with optional flag to select IB device mlx5_0 port 1):

$ mpirun -np 2 -env UCX_NET_DEVICES=mlx5_0:1 ./app