Hi Martin, Hi Simon, On Mon, Feb 04, 2019 at 03:34:41PM +0100, Martin Blumenstingl wrote: > On Thu, Jan 17, 2019 at 10:23 PM Simon Huelck <simonm...@gmx.de> wrote: > [...] > > >> I got problems with my ODROID c2 running on 4.19.16 ( and some releases > > >> earlier ). the stmmac / dwmac driver doesnt provide the 800M/900M > > >> performance that i was used to earlier. > > >>
Simon, did you ever reach 1 Gbps full duplex speed? If yes, what was the kernel version did you use? > > >> > > >> Now im stuck near 550M/600M in the same environment. but what really > > >> confuses me that duplex does hurt even more. > > > interesting that you see this on the Odroid-C2 as well. > > > previously I have only observed it on an Odroid-C1 > > > > > >> PC --- VLAN3 --> switch --VLAN3--> ODROID > > >> > > >> NAS <-- VLAN1 -- switch <-- VLAN1-- ODROID > > >> > > >> > > >> this means when im doing a iperf from PC to NAS, that my ODROID has load > > >> on RX/TX same time (duplex). this shouldnt be an issue , all is 1GBits > > >> FD. And in the past that wasnt an issue. > +Cc Emiliano who has seen a similar duplex issue on his Odroid-C1: [0] > (please note that all kernels prior to v5.1 with the pending patches > from [1] applied are only receiving data on RXD0 and RXD1 but not on > RXD2 and RXD3) > > Emiliano, can you confirm the duplex issue observed by Simon is > similar to the one you see on your Odroid-C1? > It could be but, if I understand correctly, Simon is limited in speed also in half duplex transmission (~550/600 Mbps), while we can reach at least 900 Mbps. > > >> > > >> > > >> Now what happens: > > >> > > >> - benchmark between PC - ODROID is roughly 550M > > >> > > >> - benchmark between NAS - ODROID is roughly 550M > > >> > > >> - benchmark between PC - NAS is only around 300M > > >> > > >> > > >> and like i said i was easliy able to hit 800 or even 900M to my NAS > > >> earlier. I applied some .dtb fixes for interrupt levels for the > > >> meson-gx.dtsi and meson-gxbb-odroid-c2.dtb, which will be mainlined , > > >> but the effect stayed identical. > > > good that you have the interrupt patches already applied > > > I believe it don't fix any performance issues - it's a fix for the > > > Ethernet controller seemingly getting "stuck" (not processing data > > > anymore). however, that already rules out one potential issue > > > > > >> are you aware of this problem ? Earlier kernel versions were all > > >> perfectly fine and i stepped ( self compiled) kernel through all major > > >> releases since odroid c2 was mainlined. > Guiseppe, Alexandre: what kind of data do you need from us if we see > the speeds drop (in both directions) when we send and receive at the > same time? > > [...] > > the problem is that i dont have these kernel sources anymore :-(. but i > > can provide some testing and numbers. maybe i dig if i got these kernel > > configs somewhere around but i did not change much during migrating > do you remember the kernel version where it worked fine? > > > im using a zyxel gs1900-8 switch and a qnap ts231p , and as i said i > > didnt change my setup. i was able to hit 100MByte/s from my NAS , so > > close to the benchmarks of 900MBit/s > I typically only do small transfers or I have traffic only in one direction. > thus it's likely that I missed this in my own tests > > > Regards > Martin > > > [0] > http://lists.infradead.org/pipermail/linux-amlogic/2018-December/009679.html > [1] https://patchwork.kernel.org/cover/10744905/ Regards, Emiliano
