[Mpi-forum] MPI Count proposal from today's meeting
nmm1 at cam.ac.uk
Thu Jun 17 12:30:50 CDT 2010
On Jun 17 2010, Jeff Squyres (jsquyres) wrote:
> So there might be some confusion; I can't tell from your text. The intent
> is that the mpi spec will only say that sizeof(mpi_count) is >=
> sizeof(int). An implementation can choose what the real size is. Some may
> choose to ship 2 libs: one with int and one with a 64 bit integer.
I am happy with that! Just keep ANY reference to "64-bit" from out of the
specification, because it will cause nothing but trouble. That's from
bitter experience, incidentally. Suitable wording would be something like:
MPI_Count is a typedef name for a signed integer type suitable for
holding vector lengths and offsets. It shall be at least as large as
the int type.
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