Re: [OMPI devel] failurewithzero-lengthReduce()andbothsbuf=rbuf=NULL

2010-02-11 Thread Jeff Squyres
On Feb 11, 2010, at 2:14 PM, Lisandro Dalcin wrote: > But you did not answer my previous question... What's the rationale > for requiring sendbuf!=recvbuf when count=0? I would argue you want a > free ticket :-) to put restrictions on user code (without an actual > rationale) in order to simplify

Re: [OMPI devel] failurewithzero-lengthReduce()andbothsbuf=rbuf=NULL

2010-02-11 Thread Jeff Squyres
On Feb 11, 2010, at 7:10 AM, Jeff Squyres (jsquyres) wrote: > I misparsed your reply. Yes, bcast(1) *can* sync if it wants to. I don't have > a spec handy to check if bcast(0) is defined or not (similar to reduce). If > it is, then sure, it could sync as well. FWIW, in looking through MPI-2.2,