sessions: need to have something more scalable at least for global c_index than c_vec_idex

[hppritcha]

May want to move c_vec_index into a OFI MTL specific struct which would be pointed to by the c_pml_comm in ompi_communicator_t.

Maybe in ompi_mtl_ofi_add_comm we'd know whether we're using a GLOBAL CID or not.

Something here for instance to set up a OFI MTL specific c_vec_index when not global CID:

__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_add_comm(struct mca_mtl_base_module_t *mtl,
                      struct ompi_communicator_t *comm)
{
    int ret;
    mca_mtl_ofi_ep_type ep_type = (0 == ompi_mtl_ofi.enable_sep) ?
                                  OFI_REGULAR_EP : OFI_SCALABLE_EP;

    /*
     * If thread grouping enabled, add new OFI context for each communicator
     * other than MPI_COMM_SELF.
     */
    if ((ompi_mtl_ofi.thread_grouping && (MPI_COMM_SELF != comm)) ||
        /* If no thread grouping, add new OFI context only
         * for MPI_COMM_WORLD.
         */
        (!ompi_mtl_ofi.thread_grouping && (!ompi_mtl_ofi.is_initialized))) {

        ret = ompi_mtl_ofi_init_contexts(mtl, comm, ep_type);
        ompi_mtl_ofi.is_initialized = true;

        if (OMPI_SUCCESS != ret) {
            goto error;
        }
    }


    return OMPI_SUCCESS;

error:
    return OMPI_ERROR;
}

[hppritcha]

closed via 7cae326