ELPH_WF_COMM_OPT
ELPH_WF_COMM_OPT = [integer]
Default: ELPH_WF_COMM_OPT = 0
Description: Selects the MPI communication pattern used to exchange orbitals between different MPI ranks.
| Mind: Available as of VASP 6.5.0 |
The available options are:
- 0 — Use two-sided MPI communication (default)
- 1 — Use one-sided MPI communication
Some MPI libraries have shown instability or performance issues when using one-sided communication.
If unexpected behavior occurs, it is recommended to keep the default setting ELPH_WF_COMM_OPT = 0.