Joe, On 02/17/2010 08:38 AM, Joe Ratterman wrote:

Let's assume that there are 32 FIFOs per node, and that using 6 per process or endpoint is considered optimal (both are actually higher in actuality, but it isn't too important). If we were to allow users to create up to 8 endpoints per node, it would only be possible to allocate 4 FIFOs for each endpoint. Doing this in all cases would slow the single-threaded case, which will probably be more common for quite some time.

Thanks. I'm missing some math here. I'd assume that you'd still keep 6 FIFOs per endpoint, so each endpoint can fully saturate all the network links. So, you'd have a maximum of 5 endpoints. Is this correct? Suppose you always initialize the network with 5 endpoints, but in the single threaded case just use 1 endpoint, and in the multi-threaded (or more specifically multi-threaded/multi-endpoint) case use as many, but up to 5, endpoints as specified by the user. Does this cause a performance problem? Or a resource usage problem? -- Pavan -- Pavan Balaji http://www.mcs.anl.gov/~balaji