On Wed, Oct 12, 2005 at 12:05:13PM +0100, Ashley Pittman wrote: > Thirdly is the performance issue, any MPI vendor worth his salt tries > very hard to reduce the number of function calls and library's between > the application and the network, adding another one is a step in the > wrong direction. This may not matter so much for ethernet clusters but > certainly for some people the software stack accounts for a surprising > percentage of "network" latency.
OK, so that's a new item for the Technical List Of Things To Do: measure the overhead. I suspect it'll turn out to be small, even for interconnects that care about 50 nanoseconds of additional overhead. -- greg
