Alexey Volkov Posted November 19, 2018 Share Posted November 19, 2018 Hi, I'm testing the new Rev.K board and facing troubles with uplink performance. Downlink is ok. I already asked on Olymex forum but no response so far. $ iperf3 -c 192.168.0.110 Connecting to host 192.168.0.110, port 5201 [ 4] local 192.168.0.104 port 45700 connected to 192.168.0.110 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 3.59 MBytes 30.1 Mbits/sec 708 4.24 KBytes [ 4] 1.00-2.00 sec 4.14 MBytes 34.8 Mbits/sec 964 2.83 KBytes [ 4] 2.00-3.00 sec 4.19 MBytes 35.1 Mbits/sec 956 2.83 KBytes [ 4] 3.00-4.00 sec 4.16 MBytes 34.9 Mbits/sec 944 2.83 KBytes [ 4] 4.00-5.00 sec 4.02 MBytes 33.7 Mbits/sec 925 5.66 KBytes [ 4] 5.00-6.00 sec 3.03 MBytes 25.4 Mbits/sec 605 2.83 KBytes [ 4] 6.00-7.00 sec 4.02 MBytes 33.7 Mbits/sec 904 2.83 KBytes [ 4] 7.00-8.00 sec 3.87 MBytes 32.4 Mbits/sec 859 2.83 KBytes [ 4] 8.00-9.00 sec 4.08 MBytes 34.2 Mbits/sec 928 2.83 KBytes [ 4] 9.00-10.00 sec 4.14 MBytes 34.7 Mbits/sec 955 2.83 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 39.2 MBytes 32.9 Mbits/sec 8748 sender [ 4] 0.00-10.00 sec 39.2 MBytes 32.9 Mbits/sec receiver Downlink: $ iperf3 -c 192.168.0.110 -R Connecting to host 192.168.0.110, port 5201 Reverse mode, remote host 192.168.0.110 is sending [ 4] local 192.168.0.104 port 45704 connected to 192.168.0.110 port 5201 [ ID] Interval Transfer Bandwidth [ 4] 0.00-1.00 sec 106 MBytes 890 Mbits/sec [ 4] 1.00-2.00 sec 109 MBytes 915 Mbits/sec [ 4] 2.00-3.00 sec 111 MBytes 934 Mbits/sec [ 4] 3.00-4.00 sec 111 MBytes 935 Mbits/sec [ 4] 4.00-5.00 sec 111 MBytes 934 Mbits/sec [ 4] 5.00-6.00 sec 111 MBytes 935 Mbits/sec [ 4] 6.00-7.00 sec 111 MBytes 934 Mbits/sec [ 4] 7.00-8.00 sec 111 MBytes 934 Mbits/sec [ 4] 8.00-9.00 sec 111 MBytes 935 Mbits/sec [ 4] 9.00-10.00 sec 111 MBytes 934 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 1.08 GBytes 931 Mbits/sec 37 sender [ 4] 0.00-10.00 sec 1.08 GBytes 928 Mbits/sec The same behavior is repeatable with the official Olimex firmware release #115, with Armbian Stretch and with Buildroot (fixed u-boot 2018.09, CONFIG_GMAC_TX_DELAY=4). Did anyone face the same issue? Link to comment Share on other sites More sharing options...
Alexey Volkov Posted November 21, 2018 Author Share Posted November 21, 2018 I found out what was wrong. The TP-Link router in between works the strange way by limiting the download. Direct connection to PC gives 700 Mbit/s uplink which is quite good and maybe even tweakable with CONFIG_GMAC_TX_DELAY. Link to comment Share on other sites More sharing options...
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