Setup:
ADSL2+ from Free.fr (75002 Paris, France)
v6 Freebox Server
Netgear WNDR3800 running CeroWRT v3.10.32-12
17" Macbook Pro (OSX 10.8) (wired directly to either wndr or freebox depending on the test)
fq_codel results
I'm pretty happy with these results. I'd like induced latency to be less, but 10-15ms isn't bad on DSL (I guess). What I'm happiest about is that the traffic seems to be sharing pretty fairly. However I'm not seeing the distinct tiering of bandwidth that I see on the results from higher-bandwidth setups (where the BK traffic is distinctly less than the average, with BE and EF above average.
SQM settings are as follows:
- 21000 down / 1100 up
- fq_codel (ingress ECN, no egress ECN) -- defaults
- link-layer adaptation set for ADSL at 40 bytes
Base ping is ~55ms, so this is showing 10-20 ms of induced latency under load. Not fantastic, but not something I'm going to worry about excessively. However, what I have noticed is that the traffic shaping seems more stable in .32-12 than it was in .24-8:
Results from Rich Brown's speed test script are:
Testing against demo.tohojo.dk while pinging 8.8.8.8 (60 seconds in each direction)
Download: 14.09 Mbps
Latency: (in msec, 62 pings, 0.00% packet loss)
Min: 30.157
10pct: 30.691
Median: 33.412
Avg: 34.044
90pct: 36.970
Max: 48.250
Upload: 0.87 Mbps
Latency: (in msec, 57 pings, 8.06% packet loss)
Min: 30.655
10pct: 30.744
Median: 36.658
Avg: 36.379
90pct: 41.414
Max: 46.451
Dave Täht had asked about the performance of pie on dsl (my experiences have not been positive), and also it was mentioned that nfq_codel should perform better on low-bandwidth networks. So I both both of those to the test.
nfq_codel results
Testing against demo.tohojo.dk while pinging 8.8.8.8 (120 seconds in each direction)
Download: 13.75 Mbps
Latency: (in msec, 121 pings, 0.00% packet loss)
Min: 30.059
10pct: 30.378
Median: 32.644
Avg: 33.379
90pct: 35.773
Max: 66.983
Upload: 0.87 Mbps
Latency: (in msec, 104 pings, 14.75% packet loss)
Min: 29.981
10pct: 30.714
Median: 36.427
Avg: 37.557
90pct: 43.589
Max: 49.973
Download: 13.75 Mbps
Latency: (in msec, 121 pings, 0.00% packet loss)
Min: 30.059
10pct: 30.378
Median: 32.644
Avg: 33.379
90pct: 35.773
Max: 66.983
Upload: 0.87 Mbps
Latency: (in msec, 104 pings, 14.75% packet loss)
Min: 29.981
10pct: 30.714
Median: 36.427
Avg: 37.557
90pct: 43.589
Max: 49.973
I think I prefer the fq_codel results over the nfq_codel results.
pie
Pie continues to not perform well at all on my setup. The traffic classes separate out nicely, but the latency can only be described as awful.
Yes, that's log-scale, and it needs it.
Testing against demo.tohojo.dk while pinging 8.8.8.8 (120 seconds in each direction)
Download: 14.95 Mbps
Latency: (in msec, 121 pings, 0.00% packet loss)
Min: 29.602
10pct: 30.532
Median: 34.861
Avg: 37.178
90pct: 46.831
Max: 67.668
Upload: 0.86 Mbps
Latency: (in msec, 118 pings, 3.28% packet loss)
Min: 30.322
10pct: 49.952
Median: 82.397
Avg: 83.052
90pct: 120.814
Max: 170.018
fq_codel
A check against the first results (same setup as first run).
Testing against demo.tohojo.dk while pinging 8.8.8.8 (30 seconds in each direction)
Download: 13.17 Mbps
Latency: (in msec, 31 pings, 0.00% packet loss)
Min: 30.446
10pct: 30.620
Median: 33.115
Avg: 33.193
90pct: 35.233
Max: 42.143
Upload: 0.88 Mbps
Latency: (in msec, 30 pings, 6.25% packet loss)
Min: 30.262
10pct: 30.915
Median: 34.738
Avg: 36.437
90pct: 42.182
Max: 45.980
Parting Thoughts
Something that I find curious is the ping packet-loss during upload. It seems to be endemic to my setup (when using the wndr with CeroWRT), and doesn't happen when running directly behind the Freebox Server itself. This loss wreaks havoc with the netperf UDP pings (and their results are conspicuously absent from all the results where I was testing from behind the CeroWRT router).
