ELPH WF COMM OPT: Difference between revisions
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Some MPI libraries have shown instability or performance issues when using one-sided 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 {{ | If unexpected behavior occurs, it is recommended to keep the default setting {{TAG|ELPH_WF_COMM_OPT|0}}. | ||
==Related tags and articles== | ==Related tags and articles== | ||
Latest revision as of 08:13, 24 October 2025
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.