Re: [mpich-discuss] Non-blocking Collectives

Hi Jiri, On 06/26/2013 03:08 PM, Jiri Simsa wrote:

Thank you for your quick answer. I am trying to understand the blocking behavior of MPI_Wait in the case of non-blocking collectives. Is it safe to assume that, for a non-blocking collective, MPI_Wait is guaranteed to return once all other processes call the corresponding completion operation (e.g. MPI_Wait or MPI_Test)?

I'm not sure I understand your question. Are you asking if MPI_WAIT in a process is guaranteed to return after some finite amount of time after every other process has called MPI_WAIT? Then, yes. -- Pavan Balaji http://www.mcs.anl.gov/~balaji