• Pavan Balaji's avatar
    [svn-r6578] For checkpointing code, use PMI_PORT instead of PMI_FD. · 5160e94f
    Pavan Balaji authored
    With BLCR, since all the processes are restarted by the BLCR library,
    and not by Hydra directly, we cannot provide a new PMI_FD for the MPI
    processes to use. So, we instead use the PMI_PORT mechanism and ask
    the MPI processes to connect back.
    This commit also contains a cleanup of the socket fd maintenance
    within the code to distinguish between uninitialized sockets and
    closed sockets. While this part is independent, parts of it overlapped
    with getting the combined PMI_PORT/PMI_FD code working.