Hi I have an application in which various processes create different amounts of data (including no data at all). I have found that MPI_Scatterv and MPI_Gatherv do work with arrays sendcounts or receivecounts containing zeros.
Since i didn't find the case of 0 sizes in the descriptions of these functions in the MPI reference, i wondered whether the use of zeroes is legal or if i was simply lucky that it worked. An other point: currently i use 1-sized buffers in the case of a 0-sized data transfer. Now if 0-sized data transfer is legal, would it be ok to pass NULL for the buffer? Thank You Jody
