Hi Matthieu, Thanks for your help. That is my understanding too and is verified by my test code. But I think there may be still a way to do it without calling wait or test. For my case, I just don't need to worry about the received data is correct or not (latest one or the old initial data)
Sincerely Yours, Lei Shi --------- On Fri, Apr 3, 2015 at 2:43 AM, Matthieu Brucher <matthieu.bruc...@gmail.com > wrote: > Hi, > > I think you have to call either Wait or Test to make the communications > move forward in the general case. Some hardware may have a hardware thread > that makes the communication, but usually you have to make it "advance" > yourself by either calling Wait ot Test. > > Cheers, > > Matthieu > > 2015-04-03 5:48 GMT+01:00 Lei Shi <lei...@ku.edu>: > >> 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. >> >> Sincerely Yours, >> >> Lei Shi >> --------- >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users >> Link to this post: >> http://www.open-mpi.org/community/lists/users/2015/04/26596.php >> > > > > -- > Information System Engineer, Ph.D. > Blog: http://matt.eifelle.com > LinkedIn: http://www.linkedin.com/in/matthieubrucher > Music band: http://liliejay.com/ > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/04/26598.php >
