> my working theory is that i'm getting all the interrupts, but not soon > enough... the fascinating piece is that the olpc and the pc with intel > ehc take just about the same amount of time.
indeed, if i set the interrupt threshold control to 1 micro-frame (they default to 8), i get 10-11 sec dd, say, half as slow. and ping time to my switch is half. and i can get about twice the throughput from the file server, which is still kinda slow. (hget yields about 6Mbit over a 100Mbit link) tristan -- All original matter is hereby placed immediately under the public domain.