I managed to do some network tests.
I found that no matter what cable or network port, the network on the
RPi4 always takes longer than the Rpi3 at boot time to do whatever it's
waiting for (maybe DHCP renew?), entries always look like this:
Waiting for network................ Done (16).
After that I did some iperf tests and was surprised to see that the max
I could obtain was 300Mbps.
Lots of swapping cables, ports etc. later could not get this to change,
and it matches what the Rpi3 can do.
I was using iperf in Receive mode using TCP on all clients.
Code:
--------------------
[ WARN ] Squeezelite is running, results might be affected
[ WARN ] Goto Main menu and stop squeezelite
[ INFO ] Iperf running in TCP Mode.
[ INFO ] Iperf running in Receive Mode.
[ INFO ] Iperf will run for 20 seconds, then output will show.......
iperf 3.6
Linux PCP-XLR 4.19.122-pcpCore_v8 #1 SMP PREEMPT Tue May 26 20:10:39 EDT 2020
aarch64
Control connection MSS 1460
Time: Tue, 30 Jun 2020 14:15:43 GMT
Connecting to host 192.168.1.105, port 5201
Reverse mode, remote host 192.168.1.105 is sending
Cookie: ksidzafode2ewcqlwi7h6yxwfxp7buuetkev
TCP MSS: 1460 (default)
[ 5] local 192.168.1.184 port 56022 connected to 192.168.1.105 port 5201
Starting Test: protocol: TCP, 1 streams, 131072 byte blocks, omitting 0
seconds, 20 second test, tos 0
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 34.2 MBytes 287 Mbits/sec
[ 5] 1.00-2.00 sec 36.3 MBytes 304 Mbits/sec
[ 5] 2.00-3.00 sec 36.1 MBytes 303 Mbits/sec
[ 5] 3.00-4.00 sec 36.3 MBytes 304 Mbits/sec
[ 5] 4.00-5.00 sec 35.3 MBytes 296 Mbits/sec
[ 5] 5.00-6.00 sec 35.6 MBytes 299 Mbits/sec
[ 5] 6.00-7.00 sec 34.1 MBytes 286 Mbits/sec
[ 5] 7.00-8.00 sec 37.5 MBytes 314 Mbits/sec
[ 5] 8.00-9.00 sec 35.2 MBytes 295 Mbits/sec
[ 5] 9.00-10.00 sec 35.3 MBytes 296 Mbits/sec
[ 5] 10.00-11.00 sec 36.6 MBytes 307 Mbits/sec
[ 5] 11.00-12.00 sec 34.9 MBytes 293 Mbits/sec
[ 5] 12.00-13.00 sec 35.2 MBytes 296 Mbits/sec
[ 5] 13.00-14.00 sec 37.5 MBytes 314 Mbits/sec
[ 5] 14.00-15.00 sec 36.0 MBytes 302 Mbits/sec
[ 5] 15.00-16.00 sec 35.6 MBytes 299 Mbits/sec
[ 5] 16.00-17.00 sec 34.8 MBytes 291 Mbits/sec
[ 5] 17.00-18.00 sec 35.5 MBytes 298 Mbits/sec
[ 5] 18.00-19.00 sec 37.1 MBytes 311 Mbits/sec
[ 5] 19.00-20.00 sec 34.3 MBytes 288 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
Test Complete. Summary Results:
[ ID] Interval Transfer Bitrate
[ 5] 0.00-20.00 sec 714 MBytes 299 Mbits/sec sender
[ 5] 0.00-20.00 sec 713 MBytes 299 Mbits/sec receiver
CPU Utilization: local/receiver 24.7% (2.6%u/22.2%s), remote/sender 0.1%
(0.0%u/0.1%s)
rcv_tcp_congestion cubic
iperf Done.
--------------------
I was using two different Windows target machines, and between them they
can do GigE fine.
Also I can't seem to find anything that will show what the LAN port
speed is, ifconfig doesn't say and ethtool isn't present.
Ifconfig did show there were no packet errors, however.
Then I tried the iperf cmd via the cli directly, and got GigE speed!
Code:
--------------------
$ iperf3 -c 192.168.1.105
Connecting to host 192.168.1.105, port 5201
[ 5] local 192.168.1.184 port 56030 connected to 192.168.1.105 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 109 MBytes 913 Mbits/sec 0 217 KBytes
[ 5] 1.00-2.00 sec 108 MBytes 908 Mbits/sec 0 217 KBytes
[ 5] 2.00-3.00 sec 107 MBytes 898 Mbits/sec 0 217 KBytes
[ 5] 3.00-4.00 sec 110 MBytes 921 Mbits/sec 0 217 KBytes
[ 5] 4.00-5.00 sec 109 MBytes 912 Mbits/sec 0 217 KBytes
[ 5] 5.00-6.00 sec 108 MBytes 904 Mbits/sec 0 217 KBytes
[ 5] 6.00-7.00 sec 107 MBytes 901 Mbits/sec 0 217 KBytes
[ 5] 7.00-8.00 sec 110 MBytes 920 Mbits/sec 0 217 KBytes
[ 5] 8.00-9.00 sec 109 MBytes 911 Mbits/sec 0 217 KBytes
[ 5] 9.00-10.00 sec 109 MBytes 916 Mbits/sec 0 217 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 1.06 GBytes 910 Mbits/sec 0 sender
[ 5] 0.00-10.00 sec 1.06 GBytes 910 Mbits/sec receiver
iperf Done.
--------------------
So at least the port speed and perf is fine now, but what is the diff
between the UI and CLI iperf cmds that's causing the speed diff?
------------------------------------------------------------------------
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