Hi Emiliano, On Fri, Dec 7, 2018 at 7:28 PM Emiliano Ingrassia <ingrassia@xxxxxxxxxxxxxx> wrote: [...] > > All your test seems in show it the fact the Amlogic SoC usually prioritize the > > TX traffic over RX, which is something we've known about for a while. > > > > Is that normal and/or acceptable? the public S805 datasheet mentions in the "Ethernet MAC" features section (22.2) on page 120: "RX FIFO 4KB, TX FIFO 2KB" this suggests that I did some tests using some Armbian 3.10 kernel on my Odroid-C1: root@odroidc1:~# iperf3 -c 192.168.1.100 Connecting to host 192.168.1.100, port 5201 [ 4] local 192.168.1.163 port 44297 connected to 192.168.1.100 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 49.9 MBytes 419 Mbits/sec 0 809 KBytes [ 4] 1.00-2.00 sec 48.7 MBytes 408 Mbits/sec 0 809 KBytes [ 4] 2.00-3.00 sec 48.4 MBytes 407 Mbits/sec 0 809 KBytes [ 4] 3.00-4.00 sec 48.9 MBytes 409 Mbits/sec 0 809 KBytes [ 4] 4.00-5.00 sec 48.2 MBytes 406 Mbits/sec 0 809 KBytes [ 4] 5.00-6.00 sec 48.8 MBytes 409 Mbits/sec 0 809 KBytes [ 4] 6.00-7.00 sec 48.7 MBytes 408 Mbits/sec 0 809 KBytes [ 4] 7.00-8.00 sec 48.0 MBytes 404 Mbits/sec 0 809 KBytes [ 4] 8.00-9.00 sec 48.1 MBytes 403 Mbits/sec 0 809 KBytes [ 4] 9.00-10.00 sec 48.1 MBytes 404 Mbits/sec 0 809 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 486 MBytes 408 Mbits/sec 0 sender [ 4] 0.00-10.00 sec 485 MBytes 407 Mbits/sec receiver iperf Done. root@odroidc1:~# iperf3 -c 192.168.1.100 -R Connecting to host 192.168.1.100, port 5201 Reverse mode, remote host 192.168.1.100 is sending [ 4] local 192.168.1.163 port 44301 connected to 192.168.1.100 port 5201 [ ID] Interval Transfer Bandwidth [ 4] 0.00-1.00 sec 87.5 MBytes 734 Mbits/sec [ 4] 1.00-2.00 sec 89.2 MBytes 748 Mbits/sec [ 4] 2.00-3.00 sec 89.0 MBytes 747 Mbits/sec [ 4] 3.00-4.00 sec 88.9 MBytes 746 Mbits/sec [ 4] 4.00-5.00 sec 89.2 MBytes 748 Mbits/sec [ 4] 5.00-6.00 sec 89.0 MBytes 747 Mbits/sec [ 4] 6.00-7.00 sec 88.5 MBytes 742 Mbits/sec [ 4] 7.00-8.00 sec 88.5 MBytes 742 Mbits/sec [ 4] 8.00-9.00 sec 88.5 MBytes 742 Mbits/sec [ 4] 9.00-10.00 sec 88.2 MBytes 740 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 889 MBytes 745 Mbits/sec 0 sender [ 4] 0.00-10.00 sec 887 MBytes 744 Mbits/sec receiver iperf Done. root@odroidc1:~# [...] > Furthermore, as Martin reported in one of the previous mail, > even Amlogic's buildroot kernel uses an edge rising IRQ type > for the Meson8b MAC. Other evidence that is not so clear > the need for the first patch on 32 bit Meson SoC. please note that the dwc2 USB controllers are also using IRQ_TYPE_EDGE_RISING in Amlogic's 3.10 kernel. mainline on the other hand uses IRQ_TYPE_LEVEL_HIGH after your commit 291f45dd6da5fa "ARM: dts: meson: fixing USB support on Meson6, Meson8 and Meson8b" what I want to say is: in some cases we need to use different settings than the 3.10 kernel! Regards Martin
