Re: [Cerowrt-devel] performance numbers from WRT1200AC (Re: Latest build test - new sqm-scripts seem to work; "cake overhead 40" didn't)

[Mikael Abrahamsson <swmike@swm.pp.se>]

On Fri, 26 Jun 2015, Sebastian Moeller wrote:

> Thanks for the tests, now I know what router to try next (the 
> edgerouterX, which I had eyed as a replacement for the shaper in the 
> wndr3700 tops out at 130K packets per second and hence will not really 
> work that well for a 100/40 Mbps link).

I did some more tests and it seems with SQM at 500 megabit/s I start to 
lose packets at around 250-300k PPS. At these speeds, the rrul_be test is 
"only" 85k PPS at 500 megabit/s bidirectional with large packets.

Also, I have an Edgerouter ER-5, but as soon as it does CPU based 
forwarding it's really weak, easily under 100 megabit/s even with large 
packets. OpenVPN without encryption is less than 20 megabit/s.

Btw, the WRT1200AC is now becoming more widely available and it's 150 EUR 
incl 25% VAT and shipping here in Sweden now.

Btw, I tried WNDR3800 setting it to 100/100 SQM. It seems to max out 
around 25-30k PPS, but the difference is that when the CPU is full, it 
seems to delay/ECN-mark packets because there are no packets lost. When 
the WRT1200AC runs out of CPU it starts dropping packets. I always have 0 
packets lost with the WNDR3800 when doing iperf3 testing. I found this 
difference interesting, wonder where in the forwarding path the WRT1200AC 
loses packets?

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se