Hi Kenneth,

I have added a command to print the linking info for the benchmark executable for each mpi build as per [1].

The results for benchmarks built with mpich@develop with gcc@8.3.0 are here [2] where the mpi_config file [3] has the ldd info printed out and I’m confirming that the right mpi library is being used. I don’t see any hcoll linking and can confirm that it is picking up the right mpich version.

I have also printed out the linking info for mpich itself and attach the output of the following along with this email :

[sas4990@quser10 ~]$ ldd  $(spack location -i mpich@develop%gcc@8.3.0)/lib/libmpich.so &> mpich_ldd

The only thing that I’m concerned about is that the libmpich.so has no link to libslurmfull.so (but openmpi does link to).

Thank You,
Sajid Ali | PhD Candidate
Applied Physics
Northwestern University
s-sajid-ali.github.io