How well does SQM (cake) work on this?

mcbridematt · June 20, 2023, 12:35am

We can do a bit more than that!

These are in a lab with server and client connected via 10G SFPs.

The router is running OpenWrt main/master on kernel 6.1 using the recently merged armsr target.

Sadly, [affordable] residential FTTH plans in Australia only do 50Mbps upload (1G down) so I don’t think a live test will be very interesting. I’ll keep this test in mind if I visit someone with a big link.

rrul:
 TCP upload sum                    :      1956.52          N/A          N/A Mbits/s        1400
rrrul_be:
 TCP upload sum                    :      1613.04          N/A          N/A Mbits/s        1400
tcp_nup:
 TCP upload sum                   :      1376.97          N/A          N/A Mbits/s        1400

Full result set here:

gist.github.com

https://gist.github.com/mcbridematt/abec8c79a108819d559d94ea1a702cba

ten64-sqm-test-results.txt

Starting Flent 2.1.1 using Python 3.11.4.
Starting rrul test. Expected run time: 70 seconds.
Data file written to ./rrul-2023-06-19T062638.230215.ten64-sqm-throughput.flent.gz

Summary of rrul test run from 2023-06-19 06:26:38.230215
  Title: 'ten64-sqm-throughput'

                                              avg       median       99th %          # data pts
 Ping (ms) ICMP                    :         0.54         0.43         3.54 ms             1398
 Ping (ms) UDP BE                  :         3.11         0.69         0.98 ms             1400

This file has been truncated. show original

Here is what the CPU cores look like during the tests. You can see saturation on core 1 here:

If there were an SQM implementation that hooks onto XDP rather than tc then I think there would be a significant uplift in performance.

Results without SQM for comparison:

gist.github.com

https://gist.github.com/mcbridematt/ba6a3478993c136e317195b57fe34912

ten64-no-sqm-test-results.txt

Starting Flent 2.1.1 using Python 3.11.4.
Starting rrul test. Expected run time: 70 seconds.
Data file written to ./rrul-2023-06-19T063543.159322.ten64-not-sqm.flent.gz

Summary of rrul test run from 2023-06-19 06:35:43.159322
  Title: 'ten64-not-sqm'

                                              avg       median       99th %          # data pts
 Ping (ms) ICMP                    :         0.14         0.13         0.30 ms             1397
 Ping (ms) UDP BE                  :         4.22         6.79         9.47 ms             1400

This file has been truncated. show original

rrul:
 TCP upload sum                    :      2728.44          N/A          N/A Mbits/s        1400

I can email you the flent result files, if you would like to see them.