Hi George,
Having looked again you're correct about the two 2buf reductions being wrong.
For now, I've updated my patch of nbc.c to copy buf1 into buf3 and then do buf3
OP= buf2 (see below).
Patching ompi_3buff_op_reduce to cope with user-defined operations is certainly
possible, but I don't
Rupert,
You are right, the code of any non-blocking reduce is not built with
user-level op in mind. However, I'm not sure about your patch. One
reason is that ompi_3buff is doing target = source1 op source2 while
ompi_2buf is doing target op= source (notice the op=)
Thus you can't replace
Hello devel list
I've been trying to use a non-blocking MPI_Iallreduce in a CFD application I'm
working on, but it kept segfaulting on me. I have reduced it to a simple test
case - see the gist here for the full code
https://gist.github.com/rupertnash/1182
build and run with:
