[bgl-discuss] Network questions

[Boyana Norris <norris@xxxxxxxxxxx>]

I have a few questions about (publicly known) hardware details that 
would help us make progress on a collaborative project that deals with 
power simulation of parallel apps (with irregular memory access 
patterns, which doesn't matter for the network-related questions). 
Basically we are trying to simulate the power consumption of such apps 
in a bgl-like architecture, and we need to know more about the network:

- Can the exact topology be obtained (ideally with link lengths)?
- How many different interconnect types are in the torus? Are wiring 
lengths, transmission times, protocols or other significant parameters 
available? For example, it would be useful to know link 
lengths/transmission times for
 node-->node on same backplane card
 node-->node on same midplane
 node-->node on other midplane in same cabinet
 any other possible pairings?

- Many of the above may be answered approximately by doing experiments 
ourselves if there was a way to determine exactly where an application 
ran (which processors) -- is that information obtainable from the 
resource manager or otherwise?

Thanks!
Boyana

--
"The secret to creativity is knowing how to hide your sources." Albert Einstein (1879 - 1955)

- --------------------------------------------------------------------
To add or remove yourself from this mailing list, use the 'notifyme'
command on any BGL machine. To remove: notifyme -n, to add: notifyme -y.