Jim, and others, I would like to discuss these topics (frozen proposals from MPI-4 and 4.1) at the next meeting on June 12: Pbuf_prepare, Parrived_any I would like to see if we can get agreement on these and push into MPI-4.2 or the next increment after that, rather than MPI-5. I am sure this will take more than one discussion, since we didn't get these through before. Note: They are both marked for MPI-5 currently, presumably because we don't have a broad opening for MPI-4.2, and we haven't agreed on an MPI-4.3. Here are the tickets/issues: https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-issues/issues/53... (PR:https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-standard/pull/71... ) – Ryan prepared the PR long ago. [https://urldefense.us/v3/__https://opengraph.githubassets.com/6ac106e7db39c1... ]<https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-issues/issues/53... > MPI_Parrived_any API as an addition for Partititioned Communication · Issue #537 · mpi-forum/mpi-issues<https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-issues/issues/53... > Problem The ability to take the next available partition is not supported in the current MPI-4.0 API. Proposal The API: MPI_Parrived_any(MPI_Request prequest, int *partition, int *flag); /* C inter... github.com https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-issues/issues/30... (with outdated PR: https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-standard/pull/26... ) – Ryan prepared the PR long ago. My apologies for long delays in follow up. We really need to resolve these issues as they impact both point-to-point partitioned and potential collective partitioned comms. I would encourage additional commentary on the issues; Patrick has made new, relevant observations about the dual roles of Pbuf_prepare recently on ticket#302, for example. Thank you all, Tony PS After that, I really do intend to hold a collective WG meeting to discuss partitioned collective ops 🙂 on June 19, or July 3 or 10, depending what works in tandem with the Hybrid calendar. Anthony Skjellum, PhD Professor of Computer Science Tennessee Technological University email: [email protected] cell: +1-205-807-4968