[Cake] Long-RTT broken again
chromatix99 at gmail.com
Sat Nov 7 01:49:08 EST 2015
> On 7 Nov, 2015, at 07:16, Dave Taht <dave.taht at gmail.com> wrote:
> I note that truesize is a bad indicator for tests on the rx path where
> acks are usually 2k.
At least in my test setup, cake is on the egress side, so I would hope that doesn’t come into it. I’m putting netem on the ingress side and giving it a limit of 102400 packets, which hopefully is never hit:
cake bandwidth 100Mbit satellite -> GigE -> netem delay 500ms limit 102400
netem delay 500ms limit 102400 <- GigE <- cake bandwidth 100Mbit satellite
With that setup, I’m seeing very poor throughput with CUBIC (less than 10Mbit) but much better with Westwood+ (about 50Mbit) - of course that’s the opposite of the theoretical result. Next I’ll try increasing cake’s memory limit. Both machines are desktop-class (with 1GB and 16Gb RAM), so that won’t be a problem for experimenting.
- Jonathan Morton
More information about the Cake