RE: Fw: [bgl-discuss] MPI failure, simplified

["Rajeev Thakur" <thakur@xxxxxxxxxxx>]

One thing we could do is forward this example to the IBM developer who
replied to the PMR.

Rajeev 

> -----Original Message-----
> From: Stephen Siegel [mailto:siegel@xxxxxxxxxxxx] 
> Sent: Monday, May 08, 2006 7:13 AM
> To: Rajeev Thakur
> Cc: discuss@xxxxxxxxxxxxxxx
> Subject: Re: Fw: [bgl-discuss] MPI failure, simplified
> 
> 
> On Sat, 6 May 2006, Rajeev Thakur wrote:
> 
> > I was looking up something else in the MPI Standard when I 
> came across this
> > example under "Semantics of point-to-point communication". 
> Example 3.7, pg
> > 32, MPI-1.1.
> > It says:
> > 
> > "Example 3.7 An exchange of messages.
> > 
> > CALL MPI_COMM_RANK(comm, rank, ierr) 
> > IF (rank.EQ.0) THEN 
> >     CALL MPI_SEND(sendbuf, count, MPI_REAL, 1, tag, comm, ierr) 
> >     CALL MPI_RECV(recvbuf, count, MPI_REAL, 1, tag, comm, 
> status, ierr) 
> > ELSE    ! rank.EQ.1 
> >     CALL MPI_RECV(recvbuf, count, MPI_REAL, 0, tag, comm, 
> status, ierr) 
> >     CALL MPI_SEND(sendbuf, count, MPI_REAL, 0, tag, comm, ierr) 
> > END IF 
> > 
> > This program will succeed even if no buffer space for data 
> is available." 
> > 
> > 
> > Note that it does not put any restriction on the size of 
> the sendbuf. It
> > says the program will succeed even if there is no buffer 
> space available.
> > 
> > Going by this, I would say that the Standard says that 
> Steve's code should
> > work.
> 
> I agree! (But can anyone convince IBM?)  -Steve
> 
> 

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