Hi,
I am new on this list. Let me introduce myself shortly: I am a
researcher in fluid mechanics. In this context I am using softwares
related on MPI.
I am facing a problem:
- 3 programs forms a computational framework. Soft1 is a coupling
program, i.e., it opens an MPI port at the beginning. Soft2 and Soft3
are clients, which connect to the coupling program using MPI_Comm_connect.
- After the start and the connections of Soft2 and Soft3 with Soft1, it
hangs.
I started to debug this issue and as usual I found another issue (or
perhaps it is not an issue):
- The intercommunicators I get between Soft1-Soft2 and Soft1-Soft3 are
all negative (running on CentOS 7 with infiniband Mellanox OFED driver).
- Is there some standard about communicator? I don't find anything about
this topic.
- What is a valid communicator, intercommunicator?
thx a lot
Regards
Guillaume
