[mpich-discuss] Problem with MPI_GATHER on multiple machines (F90)

[Chavez, Andres]

I ran the cpi example and below is the output.
*
[schaudhry at n13 examples]$ mpiexec -hosts n13,n03 -np 2 ./cpi
Process 0 of 2 is on n13
Process 1 of 2 is on n03
pi is approximately 3.1415926544231318, Error is 0.0000000008333387
wall clock time = 0.000931
[schaudhry at n13 examples]$ *


On Mon, Nov 21, 2011 at 2:57 PM, Rajeev Thakur <thakur at mcs.anl.gov> wrote:

> See if other MPI programs run across multiple machines. For example, the
> cpi example in the examples directory.
>
>
> On Nov 21, 2011, at 3:51 PM, Chavez, Andres wrote:
>
> > When restricted to running on one machine, my F90 program works
> perfectly, but when I try to have it run on multiple machines the problem
> below occurs.  I can't figure out what is going wrong, any help will be
> greatly appreciated thank you.
> >
> > Fatal error in PMPI_Gather: Other MPI error, error stack:
> > PMPI_Gather(863)..................: MPI_Gather(sbuf=0xeb59a0,
> scount=512, MPI_DOUBLE_COMPLEX, rbuf=(nil), rcount=512, MPI_DOUBLE_COMPLEX,
> root=0, MPI_COMM_WORLD) failed
> > MPIR_Gather_impl(693).............:
> > MPIR_Gather(655)..................:
> > MPIR_Gather_intra(283)............:
> > MPIC_Send(66).....................:
> > MPIC_Wait(540)....................:
> > MPIDI_CH3I_Progress(402)..........:
> > MPID_nem_mpich2_blocking_recv(905):
> > MPID_nem_tcp_connpoll(1838).......:
> > state_listening_handler(1908).....: accept of socket fd failed - Invalid
> argument
> > Fatal error in PMPI_Gather: Other MPI error, error stack:
> > PMPI_Gather(863)..........: MPI_Gather(sbuf=0x25d39e0, scount=512,
> MPI_DOUBLE_COMPLEX, rbuf=0x25bd9b0, rcount=512, MPI_DOUBLE_COMPLEX, root=0,
> MPI_COMM_WORLD) failed
> > MPIR_Gather_impl(693).....:
> > MPIR_Gather(655)..........:
> > MPIR_Gather_intra(202)....:
> > dequeue_and_set_error(596): Communication error with rank 1
> >
> > These are all the instances of MPI_GATHER
> > call
> MPI_GATHER(xi_dot_matrix_transp,na*n_elements*nsd/numtasks,MPI_DOUBLE_COMPLEX,xi_dot_matrix_gath,&
> >      na*n_elements*nsd/numtasks,MPI_DOUBLE_COMPLEX,0,MPI_COMM_WORLD,ierr)
> > call
> MPI_GATHER(Matrix_A_hat_3d_transp,5*na*size_matrix*nsd/numtasks,MPI_DOUBLE_COMPLEX,&
> >
>  Matrix_A_hat_3d_gath,5*na*size_matrix*nsd/numtasks,MPI_DOUBLE_COMPLEX,0,MPI_COMM_WORLD,ierr)
> > call
> MPI_GATHER(JR_matrix_transp,5*na*size_matrix*nsd/numtasks,MPI_INTEGER,JR_matrix_gath,&
> >      5*na*size_matrix*nsd/numtasks,MPI_INTEGER,0,MPI_COMM_WORLD,ierr)
> > call
> MPI_GATHER(JC_matrix_transp,5*na*size_matrix*nsd/numtasks,MPI_INTEGER,JC_matrix_gath,&
> >      5*na*size_matrix*nsd/numtasks,MPI_INTEGER,0,MPI_COMM_WORLD,ierr)
> >
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