Also, you are calling WAITALL on all your sends and then WAITALL on all your receives. This is also incorrect and may deadlock.
WAITALL on *all* your pending requests (sends and receives -- put them all in a single array). Look at examples 3.8 and 3.9 in the MPI-3.0 document. On Jan 8, 2015, at 5:15 PM, George Bosilca <bosi...@icl.utk.edu> wrote: > Diego, > > Non-blocking communications only indicate a communication will happen, it > does not force them to happen. They will only complete on the corresponding > MPI_Wait, which also marks the moment starting from where the data can be > safely altered or accessed (in the case of the MPI_Irecv). Thus deallocating > your buffer after the MPI_Isend and MPI_Irecv is incorrect. Also printing the > supposedly received values (line 127) is incorrect as there is no reason to > have the non-blocking receive completed at that moment. > > George. > > > On Thu, Jan 8, 2015 at 5:06 PM, Diego Avesani <diego.aves...@gmail.com> wrote: > Dear Tom, Dear Jeff, Dear all, > Thanks again > > for Tom: > you are right, I fixed it. > > for Jeff: > if I do not insert the CALL MPI_BARRIER(MPI_COMM_WORLD, MPIdata%iErr) > in the line 112, the program does not stop. > > Am I right? > Here the new version > > > > Diego > > > On 8 January 2015 at 21:12, Tom Rosmond <rosm...@reachone.com> wrote: > With array bounds checking your program returns an out-of-bounds error > in the mpi_isend call at line 104. Looks like 'send_request' should be > indexed with 'sendcount', not 'icount'. > > T. Rosmond > > > > On Thu, 2015-01-08 at 20:28 +0100, Diego Avesani wrote: > > the attachment > > > > Diego > > > > > > > > On 8 January 2015 at 19:44, Diego Avesani <diego.aves...@gmail.com> > > wrote: > > Dear all, > > I found the error. > > There is a Ndata2send(iCPU) instead of Ndata2recv(iCPU). > > In the attachment there is the correct version of the program. > > > > > > Only one thing, could do you check if the use of MPI_WAITALL > > and MPI_BARRIER is correct? > > > > > > Thanks again > > > > > > > > > > > > Diego > > > > > > > > On 8 January 2015 at 18:48, Diego Avesani > > <diego.aves...@gmail.com> wrote: > > Dear all, > > thanks thank a lot, I am learning a lot. > > > > > > > > I have written a simple program that send vectors of > > integers from a CPU to another. > > > > > > The program is written (at least for now) for 4 CPU. > > > > > > The program is quite simple: > > Each CPU knows how many data has to send to the other > > CPUs. This info is than send to the other CPUS. In > > this way each CPU knows how may data has to receive > > from other CPUs. > > > > > > This part of the program works. > > > > > > The problem is in the second part. > > > > > > In the second part, each processor sends a vector of > > integer to the other processor. The size is given and > > each CPU knows the size of the incoming vector form > > the first part of the program. > > > > > > In this second part the program fails and I do not > > know why. > > > > > > In the attachment you can find the program. Could you > > please help me. Problably I didn't understand properly > > the ISEND and IRECV subroutine. > > > > > > Thanks again > > > > > > > > Diego > > > > > > > > > > > > > > _______________________________________________ > > 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/2015/01/26131.php > > > _______________________________________________ > 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/2015/01/26132.php > > > _______________________________________________ > 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/2015/01/26137.php > > _______________________________________________ > 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/2015/01/26138.php -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
