Right, anyway Finalize is necessary at the end of the receiver. The
other issue is Barrier which is invoked probably when the sender has
exited hence changing the size of intercom. Can you comment that line in
both files ?
Jalel
Le 16/09/2015 16:22, Marcin Krotkiewski a écrit :
But where would I put it? If I put it in the while(1), then
MPI_Comm_Accept cannot be called for the second time. If I put it
outside of the loop it will never be called.
On 09/16/2015 04:18 PM, Jalel Chergui wrote:
Can you check with an MPI_Finalize in the receiver ?
Jalel
Le 16/09/2015 16:06, marcin.krotkiewski a écrit :
I have run into a freeze / potential bug when using MPI_Comm_accept
in a simple client / server implementation. I have attached two
simplest programs I could produce:
1. mpi-receiver.c opens a port using MPI_Open_port, saves the port
name to a file
2. mpi-receiver enters infinite loop and waits for connections
using MPI_Comm_accept
3. mpi-sender.c connects to that port using MPI_Comm_connect, sends
one MPI_UNSIGNED_LONG, calls barrier and disconnects using
MPI_Comm_disconnect
4. mpi-receiver reads the MPI_UNSIGNED_LONG, prints it, calls
barrier and disconnects using MPI_Comm_disconnect and goes to point
2 - infinite loop
All works fine, but only exactly 5 times. After that the receiver
hangs in MPI_Recv, after exit from MPI_Comm_accept. That is 100%
repeatable. I have tried with Intel MPI - no such problem.
I execute the programs using OpenMPI 1.10 as follows
mpirun -np 1 --mca mpi_leave_pinned 0 ./mpi-receiver
Do you have any clues what could be the reason? Am I doing sth
wrong, or is it some problem with internal state of OpenMPI?
Thanks a lot!
Marcin
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Jalel CHERGUI, LIMSI-CNRS, Bât. 508 - BP 133, 91403 Orsay cedex, FRANCE
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Link to this
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_______________________________________________
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/2015/09/27587.php
--
*------------------------------------------------------------------------*
Jalel CHERGUI, LIMSI-CNRS, Bât. 508 - BP 133, 91403 Orsay cedex, FRANCE
Tél: (33 1) 69 85 81 27 ; Télécopie: (33 1) 69 85 80 88
Mél: jalel.cher...@limsi.fr ; Référence: http://perso.limsi.fr/chergui
*------------------------------------------------------------------------*
