I also see confusing phraseology that implies that MPI-processes do things like "exit" and "make calls". I think it is going to be critical going forward (for ticket #310) that this sort of confusion is cleared up, not made worse. MPI Processes do not "exit" or "make calls". Only OS Processes (threads within, actually) execute code and do things like "exit" and "make calls". The MPI processes are the TARGETS of code executed by the OS Process.
The big brick wall that ticket #310 will run into if we promote the idea that "every MPI process has its own MPI_INIT/FINALIZE" is that if there are multiple MPI processes then there is no clear way to initialize them since there is no argument to MPI_INIT/FINALIZE that specifies the MPI Process and there is no way to know what MPI process a thread might represent.
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Douglas Miller BlueGene Messaging Development
IBM Corp., Rochester, MN USA Bldg 030-2 A401
dougmill@us.ibm.com Douglas Miller/Rochester/IBM