COMMUTATIVE_LONG_MSG   42 ompi/mca/coll/basic/coll_basic_reduce_scatter.c #define COMMUTATIVE_LONG_MSG (8 * 1024 * 1024)
COMMUTATIVE_LONG_MSG   40 ompi/mca/coll/basic/coll_basic_reduce_scatter_block.c #define COMMUTATIVE_LONG_MSG 8 * 1024 * 1024