Hi, As I’m banging my head on this too, please allow me to provide some details I got two stable situations : The Lime2 is connected directly to the Gbit interface of my laptop, speed are OK:
1. The Lime2 is connected directly to the Gbit interface of my laptop [alarm@lime2 ~]$ iperf3 -s -p 5201 ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from 192.168.137.1, port 58077 [ 5] local 192.168.137.58 port 5201 connected to 192.168.137.1 port 58078 [ ID] Interval Transfer Bandwidth [ 5] 0.00-1.00 sec 81.4 MBytes 683 Mbits/sec [ 5] 1.00-2.00 sec 82.2 MBytes 690 Mbits/sec [ 5] 2.00-3.00 sec 85.0 MBytes 713 Mbits/sec [ 5] 3.00-4.00 sec 82.1 MBytes 689 Mbits/sec [ 5] 4.00-5.00 sec 87.9 MBytes 738 Mbits/sec [ 5] 5.00-6.00 sec 78.8 MBytes 661 Mbits/sec [ 5] 6.00-7.00 sec 75.0 MBytes 629 Mbits/sec [ 5] 7.00-8.00 sec 88.4 MBytes 741 Mbits/sec [ 5] 8.00-9.00 sec 69.2 MBytes 581 Mbits/sec [ 5] 9.00-10.00 sec 67.2 MBytes 564 Mbits/sec [ 5] 10.00-10.04 sec 2.82 MBytes 660 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth [ 5] 0.00-10.04 sec 0.00 Bytes 0.00 bits/sec sender [ 5] 0.00-10.04 sec 800 MBytes 669 Mbits/sec receiver ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from 192.168.137.1, port 58081 [ 5] local 192.168.137.58 port 5201 connected to 192.168.137.1 port 58082 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 5] 0.00-1.00 sec 71.4 MBytes 598 Mbits/sec 0 221 KBytes [ 5] 1.00-2.00 sec 76.0 MBytes 637 Mbits/sec 0 221 KBytes [ 5] 2.00-3.00 sec 76.8 MBytes 645 Mbits/sec 0 221 KBytes [ 5] 3.00-4.00 sec 74.1 MBytes 621 Mbits/sec 0 221 KBytes [ 5] 4.00-5.00 sec 75.0 MBytes 630 Mbits/sec 0 221 KBytes [ 5] 5.00-6.00 sec 69.4 MBytes 582 Mbits/sec 0 221 KBytes [ 5] 6.00-7.03 sec 68.6 MBytes 562 Mbits/sec 0 221 KBytes [ 5] 7.03-8.03 sec 65.3 MBytes 548 Mbits/sec 0 221 KBytes [ 5] 8.03-9.00 sec 64.1 MBytes 552 Mbits/sec 0 221 KBytes [ 5] 9.00-10.00 sec 72.8 MBytes 610 Mbits/sec 0 221 KBytes [ 5] 10.00-10.04 sec 2.27 MBytes 513 Mbits/sec 0 221 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 5] 0.00-10.04 sec 716 MBytes 598 Mbits/sec 0 sender [ 5] 0.00-10.04 sec 0.00 Bytes 0.00 bits/sec receiver ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- [alarm@lime2 Dev]$ sudo ./mmio-dump 0x1c20164 01c20164: 00000006 [alarm@lime2 Dev]$ sudo i2cdump -f -y 0 0x34 No size specified (using byte-data access) 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef 00: c1 10 00 41 00 00 00 00 00 00 00 00 00 00 00 00 ??.A............ 10: 05 00 5f 00 00 00 00 00 00 00 00 00 00 00 00 00 ?._............. 20: 00 00 00 1c 00 00 00 16 cb 54 00 00 00 00 00 00 ...?...??T...... 30: 60 03 42 c9 45 22 9d 0a a5 1f 68 5f fc 16 00 00 `?B?E"????h_??.. 40: 00 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00 ....`........... 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 70 02 ..............p? 60: dc 0e 3e 08 00 00 00 00 00 00 00 00 00 00 00 00 ??>?............ 70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 dd 0e ..............?? 80: e0 fd 83 80 32 00 ff 00 00 00 00 00 00 00 00 21 ????2..........! 90: 07 a5 07 07 00 02 00 00 00 00 00 00 00 00 00 00 ????.?.......... a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 dd 0c ..............?? b0: 00 00 00 00 00 00 00 00 00 7f 00 ba 00 00 00 00 .........?.?.... c0: 01 01 02 04 07 0d 10 1a 24 2e 35 3d 49 54 5c 63 ????????$.5=IT\c d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ f0: 41 00 80 03 00 00 00 00 00 00 00 00 00 00 00 00 A.??............ 2. The Lime2 is connected to one of the 4 Gbit port of my home switch, TX speed are terrible, RX are somewhat OK [alarm@lime2 ~]$ iperf3 -s -p 5201 ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from 192.168.0.10, port 58657 [ 5] local 192.168.0.8 port 5201 connected to 192.168.0.10 port 58658 [ ID] Interval Transfer Bandwidth [ 5] 0.00-1.00 sec 0.00 Bytes 0.00 bits/sec [ 5] 1.00-2.00 sec 49.9 KBytes 409 Kbits/sec [ 5] 2.00-3.00 sec 25.7 KBytes 210 Kbits/sec [ 5] 3.00-4.00 sec 18.5 KBytes 152 Kbits/sec [ 5] 4.00-5.00 sec 17.1 KBytes 140 Kbits/sec [ 5] 5.00-6.00 sec 0.00 Bytes 0.00 bits/sec [ 5] 6.00-7.00 sec 0.00 Bytes 0.00 bits/sec [ 5] 7.00-8.00 sec 0.00 Bytes 0.00 bits/sec [ 5] 8.00-9.00 sec 0.00 Bytes 0.00 bits/sec [ 5] 9.00-10.00 sec 0.00 Bytes 0.00 bits/sec [ 5] 10.00-10.19 sec 0.00 Bytes 0.00 bits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth [ 5] 0.00-10.19 sec 0.00 Bytes 0.00 bits/sec sender [ 5] 0.00-10.19 sec 111 KBytes 89.4 Kbits/sec receiver ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from 192.168.0.10, port 58684 [ 5] local 192.168.0.8 port 5201 connected to 192.168.0.10 port 58685 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 5] 0.00-1.01 sec 87.5 MBytes 728 Mbits/sec 0 210 KBytes [ 5] 1.01-2.01 sec 89.3 MBytes 746 Mbits/sec 0 210 KBytes [ 5] 2.01-3.00 sec 84.2 MBytes 710 Mbits/sec 0 221 KBytes [ 5] 3.00-4.00 sec 85.3 MBytes 718 Mbits/sec 0 221 KBytes [ 5] 4.00-5.01 sec 80.3 MBytes 668 Mbits/sec 0 221 KBytes [ 5] 5.01-6.01 sec 88.1 MBytes 741 Mbits/sec 0 221 KBytes [ 5] 6.01-7.00 sec 89.1 MBytes 751 Mbits/sec 0 221 KBytes [ 5] 7.00-8.01 sec 89.5 MBytes 745 Mbits/sec 0 221 KBytes [ 5] 8.01-9.00 sec 83.5 MBytes 708 Mbits/sec 0 221 KBytes [ 5] 9.00-10.00 sec 79.2 MBytes 664 Mbits/sec 0 221 KBytes [ 5] 10.00-10.06 sec 2.75 MBytes 371 Mbits/sec 0 221 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 5] 0.00-10.06 sec 859 MBytes 716 Mbits/sec 0 sender [ 5] 0.00-10.06 sec 0.00 Bytes 0.00 bits/sec receiver ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- [alarm@lime2 Dev]$ sudo ./mmio-dump 0x1c20164 01c20164: 00000006 [alarm@lime2 Dev]$ sudo i2cdump -f -y 0 0x34 No size specified (using byte-data access) 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef 00: c1 10 00 41 00 00 00 00 00 00 00 00 00 00 00 00 ??.A............ 10: 05 00 5f 00 00 00 00 00 00 00 00 00 00 00 00 00 ?._............. 20: 00 00 00 1c 00 00 00 16 cb 54 00 00 00 00 00 00 ...?...??T...... 30: 60 03 42 c9 45 22 9d 0a a5 1f 68 5f fc 16 00 00 `?B?E"????h_??.. 40: 00 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00 ....`........... 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 6c 0a ..............l? 60: dd 08 3e 08 00 00 00 00 00 00 00 00 00 00 00 00 ??>?............ 70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 dd 0e ..............?? 80: e0 fd 83 80 32 00 ff 00 00 00 00 00 00 00 00 21 ????2..........! 90: 07 a5 07 07 00 02 00 00 00 00 00 00 00 00 00 00 ????.?.......... a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 dd 06 ..............?? b0: 00 00 00 00 00 00 00 00 00 7f 00 ba 00 00 00 00 .........?.?.... c0: 01 01 02 04 07 0d 10 1a 24 2e 35 3d 49 54 5c 63 ????????$.5=IT\c d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ f0: 41 00 80 03 00 00 00 00 00 00 00 00 00 00 00 00 A.??............ Hope this helps to pinepoint the source of the problem ? Regards, -- François-David Collin _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
