Re: [OMPI devel] some question about OMPI communication infrastructure

2009-06-18 Thread Leo P.
Hi Ralph, Thanks for the response. And Yes, this give me a good starting point Thanks. Leo.P From: Ralph Castain <r...@open-mpi.org> To: Open MPI Developers <de...@open-mpi.org> Sent: Thursday, 18 June, 2009 9:26:46 PM Subject: Re: [OMPI devel] s

Re: [OMPI devel] some question about OMPI communication infrastructure

2009-06-18 Thread Ralph Castain
Hi Leo The MPI communications is contained in the ompi/mca/btl code area. The BTL's (Bit Transport Layer) actually moves the message data. Each BTL is responsible for opening its own connections - ORTE has nothing to do with it, except to transport out-of-band (OOB) messages to support

[OMPI devel] some question about OMPI communication infrastructure

2009-06-18 Thread Leo P.
Hi Everyone, I wanted to ask some questions about things I am having trouble understanding. 1. As far as my understanding of MPI_INIT function, I assumed MPI_INIT typically procedure resources required including the sockets. But now as I understand from the documentation that