Despite "75mbps" upload, any individual TCP connection seems to be limited or throttled to around 10Mbps.
This impacts most file upload activities, as most transfers utilize only a single connection.
eg, uploading to Youtube, livestreaming to Youtube or Twitch, or uploading my backups to my Backblaze S3 bucket.
To hit 50+Mbps, it would require >5 individual connections.
Tests are performed using iperf to Leaseweb's public iperf server in Seattle.
https://kb.leaseweb.com/kb/network/network-link-speeds/
Ookla's Speedtest removed the option to perform speedtests with a single connection, so there is currently no way to perform the test within GCI infra anymore. Ookla's speedtest will make connections to multiple servers then aggregate the throughput from every connection to provide results.
eg, this provides unrealistic results for any data stream that only utilizes a single TCP connection.
Test is performed every hour at the top of the hour.
The scatter plot points are the highs and lows which are not maintained. The highs are generally the burst that is provided upon the start of the test.
Running iperf in reverse mode I am able to download at over 400Mbit/s consistently, with some test sustaining over 1Gbps. I don't think the slow single-threaded upload throughput can be blamed on the route or remote server/infrastructure.
frozenak@netmon:~/iperf3Vis$ iperf3 -c speedtest.sea11.us.leaseweb.net -p 5201
Connecting to host speedtest.sea11.us.leaseweb.net, port 5201
[ 5] local 192.168.1.101 port 53814 connected to 23.82.193.66 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.01 sec 2.12 MBytes 17.6 Mbits/sec
[ 5] 1.01-2.01 sec 1.25 MBytes 10.5 Mbits/sec
[ 5] 2.01-3.01 sec 768 KBytes 6.27 Mbits/sec
[ 5] 3.01-4.01 sec 896 KBytes 7.34 Mbits/sec
[ 5] 4.01-5.01 sec 512 KBytes 4.19 Mbits/sec
[ 5] 5.01-6.00 sec 640 KBytes 5.30 Mbits/sec
[ 5] 6.00-7.00 sec 512 KBytes 4.20 Mbits/sec
[ 5] 7.00-8.00 sec 640 KBytes 5.25 Mbits/sec
[ 5] 8.00-9.00 sec 896 KBytes 7.33 Mbits/sec
[ 5] 9.00-10.00 sec 1.25 MBytes 10.5 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.00 sec 9.38 MBytes 7.86 Mbits/sec sender
[ 5] 0.00-10.07 sec 8.88 MBytes 7.39 Mbits/sec receiver
frozenak@netmon:~/iperf3Vis$ iperf3 -c speedtest.sea11.us.leaseweb.net -p 5201 -R
Connecting to host speedtest.sea11.us.leaseweb.net, port 5201
Reverse mode, remote host speedtest.sea11.us.leaseweb.net is sending
[ 5] local 192.168.1.101 port 59480 connected to 23.82.193.66 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 29.1 MBytes 244 Mbits/sec
[ 5] 1.00-2.00 sec 62.0 MBytes 520 Mbits/sec
[ 5] 2.00-3.00 sec 62.5 MBytes 524 Mbits/sec
[ 5] 3.00-4.00 sec 60.1 MBytes 504 Mbits/sec
[ 5] 4.00-5.00 sec 62.1 MBytes 521 Mbits/sec
[ 5] 5.00-6.00 sec 62.9 MBytes 528 Mbits/sec
[ 5] 6.00-7.00 sec 62.9 MBytes 527 Mbits/sec
[ 5] 7.00-8.00 sec 62.4 MBytes 524 Mbits/sec
[ 5] 8.00-9.00 sec 61.0 MBytes 512 Mbits/sec
[ 5] 9.00-10.00 sec 63.1 MBytes 529 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.06 sec 615 MBytes 513 Mbits/sec sender
[ 5] 0.00-10.00 sec 588 MBytes 493 Mbits/sec receiver
And here are speedtest.net results from the ACS speedtest server in Seattle.
https://www.speedtest.net/result/19480636942
