Re: [aqm] draft-ietf-aqm-pie-01: review

2015-05-22 Thread Rong Pan (ropan)
[Bob] AFAICT, limiting the change in beta to no more than 2% will prevent PIE reacting fast to slow-start. Are you saying you intended to make PIE delay its response to a slow start? If so, ... eh? what? why? Once a slow start has reached capacity, and is heading towards twice capacity in the

[aqm] AQM hurts utilization with a single TCP stream?

2015-05-22 Thread Simon Barber
For throughput to be unaffected with a single TCP-Reno stream the buffer must grow to contain half the BDP, since the window will be halved on loss. With TCP-CUBIC the buffer must contain 20% of the BDP. CoDEL will make it's first drop when the sojourn time remains 5ms, so with TCP-Reno, if

Re: [aqm] I-D Action: draft-ietf-aqm-recommendation-04.txt

2015-05-22 Thread Mirja Kühlewind
Hi all, quick comment on ledbat. The main use case for bitTorrent was huge buffers in home routers (where in fact the configuration could be changed by the user but usually the user does not know what to do and just keeps the default config and complains about bitTorrent disturbing Skype

Re: [aqm] draft-ietf-aqm-pie-01: review

2015-05-22 Thread Bob Briscoe
Rong, I've snipped inline... At 22:15 21/05/2015, Rong Pan (ropan) wrote: Content-Language: en-US Content-Type: multipart/alternative; boundary=_000_D183961BF09Cropanciscocom_ Sorry that I have not fully read Bob's report so I have been hesitating of speaking up. Let me just comment

Re: [aqm] draft-ietf-aqm-pie-01: review

2015-05-22 Thread Vishal Misra
Bob, Rong Let me present our rationale for choosing the PI controller (hope it will be helpful to present the rationale for PIE). When we were working on the issue in 2001-2001, RED had been deployed everywhere but also disabled everywhere. People had trouble understanding and tuning RED. Our