Hi,
Today while doing some network testing with the iperf command I realised the Tinkerboard 2 only seems to get up to 15Mbps when testing UDP.
Not sure what the cause is here, we're running the Debian image, haven't made any major changes, a different computer plugged into the same port gets 500Mbps, any ideas what it might be?
linaro@linaro-alip:~$ sudo iperf3 -c <Remote IP> -u -b 500M -t 20
Connecting to host <Remote IP>, port 5201
[ 4] local <Local IP> port 58225 connected to <Remote IP> port 5201
[ ID] Interval Transfer Bandwidth Total Datagrams
[ 4] 0.00-1.00 sec 1.70 MBytes 14.2 Mbits/sec 217
[ 4] 1.00-2.00 sec 1.74 MBytes 14.6 Mbits/sec 223
[ 4] 2.00-3.00 sec 1.84 MBytes 15.4 Mbits/sec 235
[ 4] 3.00-4.00 sec 1.75 MBytes 14.7 Mbits/sec 224
[ 4] 4.00-5.00 sec 1.75 MBytes 14.7 Mbits/sec 224
[ 4] 5.00-6.00 sec 1.74 MBytes 14.6 Mbits/sec 223
[ 4] 6.00-7.00 sec 1.75 MBytes 14.7 Mbits/sec 224
[ 4] 7.00-8.00 sec 1.84 MBytes 15.4 Mbits/sec 235
[ 4] 8.00-9.00 sec 1.91 MBytes 16.1 Mbits/sec 245
[ 4] 9.00-10.00 sec 2.08 MBytes 17.4 Mbits/sec 266
[ 4] 10.00-11.00 sec 1.84 MBytes 15.4 Mbits/sec 235
[ 4] 11.00-12.00 sec 1.91 MBytes 16.1 Mbits/sec 245
[ 4] 12.00-13.00 sec 2.08 MBytes 17.4 Mbits/sec 266
[ 4] 13.00-14.00 sec 2.23 MBytes 18.7 Mbits/sec 286
[ 4] 14.00-15.00 sec 2.09 MBytes 17.6 Mbits/sec 268
[ 4] 15.00-16.00 sec 2.25 MBytes 18.9 Mbits/sec 288
[ 4] 16.00-17.00 sec 1.83 MBytes 15.3 Mbits/sec 234
[ 4] 17.00-18.00 sec 2.00 MBytes 16.8 Mbits/sec 256
[ 4] 18.00-19.00 sec 2.09 MBytes 17.5 Mbits/sec 267
[ 4] 19.00-20.00 sec 1.99 MBytes 16.7 Mbits/sec 255
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-20.00 sec 38.4 MBytes 16.1 Mbits/sec 0.072 ms 0/4916 (0%)
[ 4] Sent 4916 datagrams
iperf Done.
Here's my random windows laptop on the same port:
.\iperf3.exe -c <Remote IP> -u -b 500M -t 20
Connecting to host <Remote IP>, port 5201
[ 4] local <Local IP> port 51828 connected to <Remote IP> port 5201
[ ID] Interval Transfer Bandwidth Total Datagrams
[ 4] 0.00-1.01 sec 55.3 MBytes 460 Mbits/sec 7078
[ 4] 1.01-2.01 sec 58.1 MBytes 489 Mbits/sec 7439
[ 4] 2.01-3.00 sec 60.7 MBytes 512 Mbits/sec 7770
[ 4] 3.00-4.03 sec 61.2 MBytes 500 Mbits/sec 7832
[ 4] 4.03-5.03 sec 60.6 MBytes 508 Mbits/sec 7757
[ 4] 5.03-6.00 sec 61.7 MBytes 532 Mbits/sec 7900
[ 4] 6.00-7.00 sec 56.7 MBytes 475 Mbits/sec 7254
[ 4] 7.00-8.00 sec 58.6 MBytes 492 Mbits/sec 7505
[ 4] 8.00-9.00 sec 62.8 MBytes 527 Mbits/sec 8038
[ 4] 9.00-10.01 sec 58.4 MBytes 485 Mbits/sec 7478
[ 4] 10.01-11.00 sec 61.1 MBytes 518 Mbits/sec 7823
[ 4] 11.00-12.00 sec 58.9 MBytes 494 Mbits/sec 7539
[ 4] 12.00-13.00 sec 58.7 MBytes 493 Mbits/sec 7512
[ 4] 13.00-14.00 sec 60.9 MBytes 511 Mbits/sec 7796
[ 4] 14.00-15.01 sec 57.3 MBytes 474 Mbits/sec 7336
[ 4] 15.01-16.00 sec 59.9 MBytes 509 Mbits/sec 7663
[ 4] 16.00-17.00 sec 61.8 MBytes 517 Mbits/sec 7907
[ 4] 17.00-18.00 sec 58.4 MBytes 491 Mbits/sec 7477
[ 4] 18.00-19.01 sec 60.4 MBytes 502 Mbits/sec 7730
[ 4] 19.01-20.01 sec 60.2 MBytes 507 Mbits/sec 7709
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-20.01 sec 1.16 GBytes 500 Mbits/sec 0.060 ms 90/152542 (0.059%)
[ 4] Sent 152542 datagrams
iperf Done.
The only thing I could think to check was the link speed on the interface and that Wi-Fi was disabled, both of which are set right.
linaro@linaro-alip:~$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether 62:22:99:1b:5f:74 brd ff:ff:ff:ff:ff:ff
inet6 fe80::80ab:a4a7:39b9:4e1e/64 scope link
valid_lft forever preferred_lft forever
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 7c:10:c9:ee:05:7b brd ff:ff:ff:ff:ff:ff
inet <Local IP>/24 brd <Local IP Broadcast> scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet6 fe80::7e10:c9ff:feee:57b/64 scope link
valid_lft forever preferred_lft forever
4: wlp1s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 48:e7:da:7b:3b:b7 brd ff:ff:ff:ff:ff:ff
Link speed:
linaro@linaro-alip:~$ dmesg | grep Gbps
[ 14.133160] rk_gmac-dwmac fe300000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[ 18.176732] rk_gmac-dwmac fe300000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
TCP works fine, up to 800Mbps which is what we expect.
Any help appreciated thanks.
