Any ideas of what is going on? I tried to limit the bandwidth of iperf3, found that with 3Gb/s it is quite stable with no traffic loss, but 5Gb/s and higher seems to always cause a traffic stall. The stall seems to always last for about 6 seconds.
Code: Select all
root@pve5:~# iperf3 -c 10.255.1.11 -t 40
Connecting to host 10.255.1.11, port 5201
[ 5] local 10.255.201.9 port 34596 connected to 10.255.1.11 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 1.15 GBytes 9.92 Gbits/sec 0 1.30 MBytes
[ 5] 1.00-2.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.44 MBytes
[ 5] 2.00-3.00 sec 970 MBytes 8.14 Gbits/sec 16 1.54 MBytes
[ 5] 3.00-4.00 sec 615 MBytes 5.16 Gbits/sec 179 1.33 MBytes
[ 5] 4.00-5.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.57 MBytes
[ 5] 5.00-6.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.57 MBytes
[ 5] 6.00-7.00 sec 595 MBytes 4.99 Gbits/sec 1 8.74 KBytes
[ 5] 7.00-8.00 sec 992 MBytes 8.33 Gbits/sec 179 1.37 MBytes
[ 5] 8.00-9.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.51 MBytes
[ 5] 9.00-10.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.53 MBytes
[ 5] 10.00-11.00 sec 396 MBytes 3.32 Gbits/sec 180 245 KBytes
[ 5] 11.00-12.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.43 MBytes
[ 5] 12.00-13.00 sec 33.8 MBytes 283 Mbits/sec 2 8.74 KBytes
[ 5] 13.00-14.00 sec 0.00 Bytes 0.00 bits/sec 1 8.74 KBytes
[ 5] 14.00-15.00 sec 0.00 Bytes 0.00 bits/sec 0 8.74 KBytes
[ 5] 15.00-16.00 sec 0.00 Bytes 0.00 bits/sec 1 8.74 KBytes
[ 5] 16.00-17.00 sec 0.00 Bytes 0.00 bits/sec 0 8.74 KBytes
[ 5] 17.00-18.00 sec 0.00 Bytes 0.00 bits/sec 0 8.74 KBytes
[ 5] 18.00-19.00 sec 455 MBytes 3.82 Gbits/sec 167 1.34 MBytes
[ 5] 19.00-20.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.56 MBytes
[ 5] 20.00-21.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.56 MBytes
[ 5] 21.00-22.00 sec 500 MBytes 4.19 Gbits/sec 2 8.74 KBytes
[ 5] 22.00-23.00 sec 1.07 GBytes 9.19 Gbits/sec 208 1.37 MBytes
[ 5] 23.00-24.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.37 MBytes
[ 5] 24.00-25.00 sec 240 MBytes 2.01 Gbits/sec 2 8.74 KBytes
[ 5] 25.00-26.00 sec 0.00 Bytes 0.00 bits/sec 1 8.74 KBytes
[ 5] 26.00-27.00 sec 0.00 Bytes 0.00 bits/sec 0 8.74 KBytes
[ 5] 27.00-28.00 sec 0.00 Bytes 0.00 bits/sec 1 8.74 KBytes
[ 5] 28.00-29.00 sec 0.00 Bytes 0.00 bits/sec 0 8.74 KBytes
[ 5] 29.00-30.00 sec 0.00 Bytes 0.00 bits/sec 0 8.74 KBytes
[ 5] 30.00-31.00 sec 115 MBytes 966 Mbits/sec 160 1.25 MBytes
[ 5] 31.00-32.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.33 MBytes
[ 5] 32.00-33.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.55 MBytes
[ 5] 33.00-34.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.55 MBytes
[ 5] 34.00-35.00 sec 422 MBytes 3.54 Gbits/sec 180 1.37 MBytes
[ 5] 35.00-36.00 sec 1.15 GBytes 9.90 Gbits/sec 0 1.46 MBytes
[ 5] 36.00-37.00 sec 1.15 GBytes 9.88 Gbits/sec 0 1.54 MBytes
[ 5] 37.00-38.00 sec 879 MBytes 7.37 Gbits/sec 1 8.74 KBytes
[ 5] 38.00-39.00 sec 719 MBytes 6.03 Gbits/sec 179 1.26 MBytes
[ 5] 39.00-40.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.33 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-40.00 sec 26.3 GBytes 5.64 Gbits/sec 1460 sender
[ 5] 0.00-40.00 sec 26.3 GBytes 5.64 Gbits/sec receiver
iperf Done.