5.3.1. Partition Communication with Threads/Tasks Using OpenMP 4.0 or later

The equal partitioning on send-side and receive-side in Example Semantics of Partitioned Point-to-Point Communication is shown using threads. In this case, the receive-side uses the same number of partitions as the send-side as in the previous example, but this example uses multiple threads on the send-side. Note that the MPI_PSEND_INIT and MPI_PRECV_INIT functions match each other like in the previous example.

Example Equal partitioning on send-side and receive-side using threads.