ROMIO and MPICH-4.3.0

February 3, 2025 by Latham, Robert J.

It’s been a while since I posted a “what’s new in ROMIO” with a corresponding MPICH release. Sorry about that!

Today the MPICH team released MPICH-4.3.0. What does this mean for ROMIO users? Here are some of the new things since the last major release, MPICH-4.2.0 (about a year ago: Feb 9 2024)
* software engineering to support MPICH ABI compability
* cleanups in ROMIO tests
* remove deprecated MPI-1 routines (should make OpenMPI happier)
* “large count” cleanups (see my more detailed writeup)
* auto-detect DAOS file systems
* now able to handle GPU buffers (by copying into host memory )