[mpich2-dev] tests which assume that the implementation supports truncated messages

[David Gingold]

MPICH2 folks --

Some of the tests that come with MPICH2 assume that the MPI  
implementation supports truncated messages (i.e. point-to-point  
operations with more data sent than received).  It looks like the  
tests are using this as a way to determine whether errors can be  
returned in the receive status.

Our MPI implementation doesn't support truncation.  It's not required  
by the standard, and dispensing with it simplified our code and  
improved performance.

Would it make sense to change these tests to be more portable?  Could  
they be made to trigger a different sort of error, perhaps one  
checked in the HAVE_ERROR_CHECKING portions of the top-level receive  
code?

-dg

--
David Gingold
Principal Software Engineer
SiCortex
Three Clock Tower Place, Suite 210
Maynard MA 01754
(978) 897-0214 x224



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