parallel processing - Fortran MPI doesn't run on all of the given number of Processors -


i'm running program in model grid must processed. when want run program using eg. 10 processors workers (mpirun -np 11 -machinefile host civil_mpi.exe), 3 peocessors run program , rest stop @ beginning of program without error!

if decrease size of model grid, works correctly. total ram of machine on 30 gb, , size of memory needed each process (based on model grid size) less 1 gb, theoretically there should no problem ram. me on case?

the os linux opensuse, , i'm running mpi on machine 16 dual-core cpus. code is: 

      call mpi_init(ierror)        call mpi_comm_rank(mpi_comm_world, procid, ierror)        call mpi_comm_size(mpi_comm_world, nproc, ierror)       nworker = nproc - 1        call mpi_get_processor_name (procname, len, ierror)         n_slice = 280       ny0(1) = 1       ny(1) = 2         = 2,n_slice        ny0(i) = ny0(i-1) + 2        ny(i) = ny(i-1) + 2       end        nx = 461       nx0 = 1       nz = 421       nz0 = 1        nwork = 1        = 1,280          if(nworker*nwork .lt. n_slice)          nwork = nwork + 1          end if       end        if (procid .eq. masterid)        worker_job = 1        q = 1,nworker           iwork = q           call mpi_send(worker_job, 1, mpi_integer, iwork, tag,      $                mpi_comm_world,ierror)          call mpi_send(nx0, 1, mpi_integer, iwork, tag,      $                mpi_comm_world,ierror)          call mpi_send(ny0, 280, mpi_integer, iwork, tag,      $                mpi_comm_world, ierror)          call mpi_send(nz0, 1, mpi_integer, iwork, tag,      $                mpi_comm_world,ierror)          call mpi_send(nx, 1, mpi_integer, iwork, tag,      $                mpi_comm_world, ierror)          call mpi_send(ny, 280, mpi_integer, iwork, tag,      $                mpi_comm_world,ierror)          call mpi_send(nz, 1, mpi_integer, iwork, tag,      $                mpi_comm_world, ierror)         worker_job = worker_job + nwork        end        end if  c ------------------ worker task -----------        if (procid .gt. masterid) c      write(*,*)'processor',procid,'is working....'        call mpi_recv(worker_job, 1, mpi_integer, masterid, tag,      $                mpi_comm_world, status, ierror)        call mpi_recv(nx0, 1, mpi_integer, masterid, tag,      $                mpi_comm_world, status, ierror)        call mpi_recv(ny0, 280, mpi_integer, masterid, tag,      $                mpi_comm_world, status, ierror)        call mpi_recv(nz0, 1, mpi_integer, masterid, tag,      $                mpi_comm_world, status, ierror)        call mpi_recv(nx, 1, mpi_integer, masterid, tag,      $                mpi_comm_world, status, ierror)        call mpi_recv(ny, 280, mpi_integer, masterid, tag,      $                mpi_comm_world, status, ierror)        call mpi_recv(nz, 1, mpi_integer, masterid, tag,      $                mpi_comm_world, status, ierror)          j = worker_job, worker_job + nwork - 1           if (j .le. 280)          write(*,*) '****************processor',procid,'is working'          call rawmig(j,nx0,ny0(j),nz0,nx,ny(j),nz)          end if          end       end if        call mpi_finalize(ierror)        end

problem solved! thank comments, i've realized 1 of matrices in main program must have been synchronized new dementions comming processors! gilles gouaillardet, trying make shortend , readable version of program post after suggestion , during saw matrice in form build output iy=ny0,ny (the varying dimension) must have been iy=1,2. first of all, matrice dimensions in definitions must have been corrected, , because defined directly comming variables each processor, of processors stoped without erorr message!


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