could you provide me a simple testcode for that? Comm_join and
intercomm_merge should work, I would have a look at that...
(separate answer to your second email is coming soon)
Thanks
Edgar
Robert Latham wrote:
Hi
I've got a bit of an odd bug here. I've been playing around with MPI
process management routines and I notied the following behavior with
openmpi-1.0.1:
Two processes (a and b), linked with ompi, but started independently
(no mpiexec, just started the programs directly).
- a and b: call MPI_Init
- a: open a unix network socket on 'fd'
- b: connect to a's socket
- a and b: call MPI_Comm_join over 'fd'
- a and b: call MPI_Intercomm_merge, get intracommunicator.
These steps all work fine.
Now the odd part: a and b call MPI_Comm_rank and MPI_Comm_size over
the intracommunicator. Both (correctly) think Comm_size is two, but
both also think (incorrectly) that they are rank 1.
==rob
