[Mpi3-tools] MPI handles debugging interface
ashley at pittman.co.uk
Wed Jun 3 08:39:33 CDT 2009
On Wed, 2009-06-03 at 08:59 -0400, Jeff Squyres wrote:
> Why use a bunch of individual query functions when we could have a
> single, much more general form that is more easily extensible? The
> query function would essentially be driven by an enum indicating the
> specific request, and the OUT arguments could be varargs.
> +++ Advantage: this one function can be extended simply by adding new
> enum values, possibly in an MPI implementation-specific way (e.g.,
> have some non-standard / value-add functions)
The existing method can also be extended simply by adding new functions,
possibly in a MPI implementation-specific way.
> --- Disadvantage: lose compiler type safety checking when building/
> debugging tools that use this interface.
A very valid point, it's far from easy to understand the interface
currently and we need all the help we can get via type checking or any
> I don't have strong feelings either way. I think I'm marginally in
> favor of individual functions just because it gives type safety for
> tools authors. But I could be convinced to go the enum/varargs route
> if people feel strongly.
Personally I'm in favour of extensions being done with sympathy to the
existing interface. Unless there is a significant reason to move, which
I can't see, changing the communication mechanism is just going to add
confusion and raise the barrier for people implementing either side of
More information about the mpiwg-tools