[mpich-discuss] How expensive is MPI_Win_create() compared to memcpy()?

[Pavan Balaji]

On 12/20/2011 05:21 PM, Jed Brown wrote:
> If there was a way to create a window, post, and start without imposing
> a hard synchronization, it would be useful. Alternatively, if we could
> "re-seat" a window by giving it different memory...

Window creation will always need to be synchronizing, at least to gather 
size and base address parameters.

"Re-seating" a window with a different memory is essentially creating a 
new window.  What are you trying to accomplish?

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji