Re: [mpi-21] Proposal EH2: add const keyword to the C bindings

[Doug Gregor <dgregor@xxxxxxxxxx>]

On Jan 10, 2008, at 8:53 AM, Richard Treumann wrote:
> I have mentioned that I think the proposal for removing the send  
> buffer access restriction is worth examining. I have even said I  
> think it likely (not obvious) that the rule should be relaxed. First  
> we should conclude that keeping it has trivial potential for being  
> important to some MPI implementation in comparison the burden it  
> puts on application writers. Performance matters a lot and always  
> will.


Can anyone point to an MPI implementation *in use* that takes  
advantage of this rule?

The only example I have heard about is a DMA engine that is not cache- 
coherent with the main processor, but we know that particular example  
is no longer relevant.

	- Doug