Hello,
I have a problem using MPI_Intercomm_create.
I 5 tasks, let's say T0, T1, T2, T3, T4 resulting from two spawn
operations by T0.
So I have two intra-communicator :
intra0 contains : T0, T1, T2
intra1 contains : T0, T3, T4
my goal is to make a collective loop to build a single intra-communicator
containing T0, T1, T2, T3, T4
I tried to do it using MPI_Intercomm_create and MPI_Intercom_merge calls,
but without success (I always get MPI internal errors).
What I am doing :
on T0 :
*******
MPI_Intercom_create(intra0,0,intra1,0,1,&new_com)
on T1 and T2 :
**************
MPI_Intercom_create(intra0,0,MPI_COMM_WORLD,0,1,&new_com)
on T3 and T4 :
**************
MPI_Intercom_create(intra1,0,MPI_COMM_WORLD,0,1,&new_com)
I'm certainly missing something. Could anybody help me to solve this
problem ?
Best regards,
Frédéric.
PS : of course I did an extensive web search without finding anything
usefull on my problem.
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