Hi, I'm working on developing some components for OpenMPI, but am a little unclear as to how to implement efficient sends and receives. I'm wanting to do zero-copy two-sided MPI, but as far as I can see, this is not going to be easy. As best as I can tell, the receive mechanism copies into a temporary user buffer then, on actually handling the receive, copies that into the application's buffer. Would I be correct in this interpretation?
I'm also a little hazy on how to get information on messages being passed. What information on the sending process is visible to the receiving BTL components? Finally, I'm assuming that developers have, over time, produced test harnesses and other useful (for developers) tools that would have no real value to general users. Has anyone put together a kit of development aids for coders of new components? Jonathan Day __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
