[Mpi-forum] MPI Count proposal from today's meeting
ftillier at microsoft.com
Wed Jun 16 12:27:03 CDT 2010
Yesterday, we discussed the direction we want to take to support large counts.
We reviewed the various plans that were presented since ticket #14 was originally introduced in September 2008. We then put up for a straw vote the following plan:
Define MPI_Count in all existing APIs that use an int count. Implementations will decide whether to define MPI_Count as a C int, or something larger. Defining MPI_Count as a C int provides for backward compatibility with MPI 2.2 applications. Defining it as a 64-bit integer lets an implementation support large counts. Demand can drive which modes implementers will support.
Results of the straw vote were 19 for, 2 abstain, 0 against.
I'll be creating a ticket for this, hopefully have something by October.
More information about the mpi-forum