You can free the request with MPI_Request_free if you don't want to wait on it. I have no idea how you'll write a correct program without waiting for receive completions at least, though. -- Pavan
On Apr 2, 2015, at 11:44 PM, Lei Shi <[email protected]> wrote:
Hi Junchao,
Thanks for your reply. For my case, I don't want to check the data have been received or not. So I don't want to call MPI_Test or any function to verify it. But my problem is like if I ignore calling the MPI_Wait, just call Isend/Irev, my program freezes for several sec and then continues to run. My guess is probably I messed up the MPI library internal buffer by doing this.
On Thu, Apr 2, 2015 at 7:25 PM, Junchao Zhang <[email protected]> wrote: Does MPI_Test fit your needs?
--Junchao Zhang
On Thu, Apr 2, 2015 at 7:16 PM, Lei Shi <[email protected]> wrote: I want to use non-blocking send/rev MPI_Isend/MPI_Irev to do communication. But in my case, I don't really care what kind of data I get or it is ready to use or not. So I don't want to waste my time to do any synchronization by calling MPI_Wait or etc API.
But when I avoid calling MPI_Wait, my program is freezed several secs after running some iterations (after multiple MPI_Isend/Irev callings), then continues. It takes even more time than the case with MPI_Wait. So my question is how to do a "true" non-blocking communication without waiting for the data ready or not. Thanks.
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-- Pavan Balaji ✉️ http://www.mcs.anl.gov/~balaji _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss