[mpi3-coll] More on in-place

[Torsten Hoefler]

On Mon, Feb 02, 2009 at 11:31:32AM -0800, Adam Moody wrote:
> I think we need another statement about the in-place option in the text  
> regarding buffer access.  Something along the lines of:
>
> When using the "in-place" option, message buffers may function as both  
> send and receive buffers.  Such buffers should not be modified or  
> accessed until the operation completes.
good point! I added: "When using the ``in place'' option, message buffers
function as both send and receive buffers. Such buffers should not be
modified or accessed until the operation completes."

> This is somewhat unique to NBC.  However, this statement is necessary  
> for blocking collectives in threaded environments, as well.  Did the  
> "Send buffer access" ticket resolve this?  Either way, it might not hurt  
> to reiterate this point in the NBC intro, since it is more likely to  
> come up there.
uh well - collectives need more discussion anyway.

Best,
  Torsten

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Torsten Hoefler       | Postdoctoral Researcher
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