Slow ethernet in linux

[ak_hepcat]

using netperf and multiple streams, courtesy of the wrapper script: https://github.com/akhepcat/BettererSpeedTest

Code:

qdisc is not enabled:   root@p64:~# lsmod | grep ifb | wc -l   0   root@p64:~# BettererSpeedTest   2016-04-29 10:29:38 Testing against speedtest (ipv4) with 20 simultaneous sessions while pinging oldspeedtest (30 seconds)   ...............................    Download:  942 mb/s     Latency: (in msec, 31 pings, 0.00% packet loss)         Min: 0.306       10pct: 0.325      Median: 0.772         Avg: 1.032       90pct: 1.970         Max: 2.460   ...................................      Upload:  575 mb/s     Latency: (in msec, 24 pings, 0.00% packet loss)         Min: 0.414       10pct: 0.424      Median: 42.400         Avg: 58.657       90pct: 137.000         Max: 253.000  

And then I enable qdisc, via custom wrapper script:

Code:

  root@p64:~# tc qdisc show   qdisc htb 1: dev eth0 root refcnt 2 r2q 625 default 11 direct_packets_stat 0 direct_qlen 1000   qdisc fq_codel 8002: dev eth0 parent 1:11 limit 10240p flows 1024 quantum 300 target 5.0ms interval 100.0ms   qdisc ingress ffff: dev eth0 parent ffff:fff1 ----------------   qdisc htb 1: dev ifb0 root refcnt 2 r2q 625 default 11 direct_packets_stat 0 direct_qlen 32   qdisc fq_codel 8001: dev ifb0 parent 1:11 limit 10240p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn       root@p64:~# BettererSpeedTest   2016-04-29 10:31:54 Testing against speedtest (ipv4) with 20 simultaneous sessions while pinging oldspeedtest (30 seconds)   ..............................    Download:  505 mb/s     Latency: (in msec, 31 pings, 0.00% packet loss)         Min: 0.333       10pct: 0.365      Median: 0.457         Avg: 0.626       90pct: 0.546         Max: 5.740   ..............................      Upload:  845 mb/s     Latency: (in msec, 29 pings, 0.00% packet loss)         Min: 0.368       10pct: 0.416      Median: 0.750         Avg: 2.315       90pct: 2.820         Max: 26.500  

as you can see, my queuing still needs some tweaking to get the download speeds to recover to pre-queuing speeds,
but the upload speeds are quite nice.