What should I use? Even the statement right after MPI_Sent doesn't execute. My code has something like this: //////////////////////in the root process while(i<iWorldSize) { cout << "executing send for the " << i << "th time" << endl; MPI_Send( A[i], n/iWorldSize * m, MPI_INT, i, itag, MPI_COMM_WORLD ); sent++; cout << "executed send for the " << i << "th time, sending " << n/iWorldSize * m << " bytes to processor " << i << endl; i+=n/iWorldSize; }//end while ////////////////////in the slave process while(sent) { cout << "**********sent= " << sent << endl; cout << "\n\n\n**********Executing receive*******" << endl; MPI_Recv(&buffer, n/iWorldSize*m, MPI_INT, 0, itag, MPI_COMM_WORLD, &status); sent=0; cout << "**********receive executed***********" << endl; } On Mon, Dec 2, 2013 at 5:21 PM, Pavan Balaji <[email protected]> wrote:

Did you try printing how many bytes you are receiving before calling MPI_Recv?

— Pavan

On Dec 1, 2013, at 11:43 PM, Soheil Hooshdaran <[email protected]> wrote:

...

Hello. Please tell me what is wrong with my program that it doesn't goes no further than executing MPI_Send() for the first time. The file is attached

On Sat, Nov 30, 2013 at 7:02 PM, Soheil Hooshdaran < [email protected]> wrote: So what do I have to do now, sir? Especially regarding my Bcast()s a,d Recv()s

On Sat, Nov 30, 2013 at 1:05 AM, Pavan Balaji <[email protected]> wrote:

Please keep [email protected] cc’ed.

On Nov 29, 2013, at 2:19 PM, Soheil Hooshdaran <[email protected]> wrote:

...

executing send for the 3th time executed send for the 3th time, sending 40 bytes Fatal error in MPI_Recv: Message truncated, error stack: MPI_Recv(184).....................: MPI_Recv(buf=0xbff95c98, count=0, MPI_INT, src=0, tag=1, MPI_COMM_WORLD, status=0xbff95c70) failed MPIDI_CH3U_Receive_data_found(131): Message from rank 0 and tag 1 truncated; 160 bytes received but buffer size is 0

I don’t think I can explain the error any better than what the message above already says.

-- Pavan Balaji http://www.mcs.anl.gov/~balaji

<p1_Hooshdaran_static[debug].cpp>

-- Pavan Balaji http://www.mcs.anl.gov/~balaji