[Beowulf] Re: The move to gigabit - technical questions
steve_heaton at ozemail.com.au
Sat Mar 19 22:59:45 EST 2005
> When he said "vanilla", I believe he meant, "Using
> the stock Linux driver settngs with no attempt at tuning for the needs
> of my particular HPC application."
> Since he is using Intel Pro/1000 cards, he probably should also try
> using GAMMA rather than TCP/IP.
Yep, the kind of tweak that Peter Kjellström has proposed
(InterruptThrottleRate=0) is still on the cards. As is the investigation
of GAMMA. Two for two Andrew ;)
There's also sand pit time for the relevance of jumbo packets, falcON et
al style Nbody hierarchy methodologies etc etc.
I'll be documenting as I go for anyone interested to follow. Generally
Nbody code seems to push the net hard during the initial data
distribution, burns the processors hard on the calcs then the net gets a
squeak again when the results are assembled.
...Then when my Fair Godmother turns up with that pile of dual Opertons
I'll be ready =)
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