mpich is from ANL

Basic installation. For tcp or ethernet connection with intel compiler

mkdir build; cd build
../configure -prefix=/share/mpich/3.3_intel18 --enable-shared CC=icc CXX=icpc FC=ifort F77=ifort
make -j 20; make install

For infiniband

mkdir build; cd build;
../configure -prefix=/share/mpich/3.3_intel18_ucx --with-ibverbs-include=/usr/include/infiniband
--with-iverbs-lib=/usr/lib64 --with-hcoll=/opt/mellanox/hcoll --with-mxm=/opt/mellanox/mxm
--with-knem=/opt/knem-1.1.2.90mlnx1 --enable-shared CC=icc CXX=icpc FC=ifort F77=ifort --with-device=ch4:ucx
make -j 20 ; make install

Some discussion

--with-slum might not be recommeded in the SLURM environment
In infiniband-network with iverbs, using --with-device=ch3:nemesis:mxm may not work. MPI_Finalize crashes. Use UCX. UCX is contained in the mpich 3.3.x source package

MPICH from cray environment

If it hangs when reading files
`export MPICH_MPIIO_HINTS="*:romio_ds_read=disable:romio_cs_read=disable"
Those hints might be injected into MPI_info() but code recompilation is necessary
In order to investigate the current MPICH setup

export MPICH_MPIIO_STATS=1
export MPICH_ENV_DISPLAY=1
export MPICH_MPIIO_HINTS_DISPLAY=1
export MPICH_OFI_VERBOSE=1
export MPICH_OFI_NIC_VERBOSE=1