Re: Throughput problems with dummynet and high delays

2006-10-31 Thread Pieter de Boer
Andy Jones wrote: What happens is as the TCP window grows larger (about 3-4MB), the sender spends most of its time processing interrupts (80-90% as reported by top) and throughput peaks at about 300Mbps. I've dug into the dummynet code and I've found that a large amount of time is spent in the

Re: Throughput problems with dummynet and high delays

2006-10-31 Thread Randall Stewart
Andy: Hi, you must be working with Injong :-) At one point I was playing with dummynet in satellite networks. One of the KEY problems I found is that the number of packets you can have in queue, limited to 100, was not nearly enough. This was (at the time) a hardcoded parameter inside both the i