[LEDE-DEV] SUNXI: Network problem with kernel 4.9.51

[Hauke Mehrtens]

On 09/25/2017 08:47 AM, Gerhard Bertelsmann wrote:
> Hi Hauke,
> 
> Am 2017-09-25 00:14, schrieb Hauke Mehrtens:
>> On 09/24/2017 04:39 PM, Hauke Mehrtens wrote:
>>> On 09/24/2017 12:27 AM, Lucian Cristian wrote:
>>>> On 23.09.2017 19:03, Gerhard Bertelsmann wrote:
>>>>> Hi Zoltan,
>>>>>
>>>>> Am 2017-09-23 17:36, schrieb Zoltan HERPAI:
>>>>>> Hi Gerhard,
>>>>>>
>>>>>> On Sat, 23 Sep 2017, Gerhard Bertelsmann wrote:
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> I'm trying Lede HEAD with a BananaPI (SUNXI7 A20) and have an issue
>>>>>>> with the network connection:
>>>>>>>
>>>>>>> root at Modellbahn-BPi:/# ping -qc 100 192.168.0.9
>>>>>>> PING 192.168.0.9 (192.168.0.9): 56 data bytes
>>>>>> [snip]
>>>>>>
>>>>>>> Does anybody have a clue why this happens ?
>>>>>>
>>>>>> Can you please post a full dmesg.
>>>>>
>>>>> yes, of course:
>>>>>
>>>>> root at Modellbahn-BPi:~# dmesg
>>>>> [    0.000000] Booting Linux on physical CPU 0x0
>>> .......
>>>>>
>>>>> root at Modellbahn-BPi:~# ping -qc 100 192.168.0.9
>>>>> PING 192.168.0.9 (192.168.0.9): 56 data bytes
>>>>>
>>>>> --- 192.168.0.9 ping statistics ---
>>>>> 100 packets transmitted, 94 packets received, 6% packet loss
>>>>> round-trip min/avg/max = 0.354/0.518/1.182 ms
>>>>>
>>>>> root at Modellbahn-BPi:~# ip -s -d link show eth0
>>>>> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel
>>>>> master br-lan state UP mode DEFAULT group default qlen 1000
>>>>>     link/ether 02:03:0a:43:06:44 brd ff:ff:ff:ff:ff:ff promiscuity 1
>>>>>     bridge_slave state forwarding priority 32 cost 4 hairpin off guard
>>>>> off root_block off fastleave off learning on flood on port_id 0x8001
>>>>> port_no 0x1 designated_port 32769
>>>>>     RX: bytes  packets  errors  dropped overrun mcast
>>>>>     88003      560      0       9       0       0
>>>>>     TX: bytes  packets  errors  dropped carrier collsns
>>>>>     20196      210      0       0       0       0
>>>>>
>>>>> Regards,
>>>>>
>>>>> Gerd
>>>>>
>>>>> _______________________________________________
>>>>> Lede-dev mailing list
>>>>> Lede-dev at lists.infradead.org
>>>>> http://lists.infradead.org/mailman/listinfo/lede-dev
>>>>
>>>> I don't have packet loss but I have slow upload (A20 Olimex Lime2) but
>>>> maybe is the uboot bug found on the internet if is not already in the
>>>> uboot mainline, if I increase the number of parallel connection the
>>>> speed goes up to 200Mb/s
>>>>
>>>> UP:
>>>>
>>>> [ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
>>>> [  4]   0.00-1.00   sec  2.18 MBytes  18.2 Mbits/sec  148   7.03 KBytes
>>>> [  4]   1.00-2.00   sec  4.73 MBytes  39.7 Mbits/sec  317   4.22 KBytes
>>>> [  4]   2.00-3.00   sec  4.38 MBytes  36.7 Mbits/sec  294   4.22 KBytes
>>>> [  4]   3.00-4.00   sec  4.92 MBytes  41.2 Mbits/sec  344   2.81 KBytes
>>>> [  4]   4.00-5.00   sec  3.01 MBytes  25.3 Mbits/sec  210   12.7 KBytes
>>>> [  4]   5.00-6.00   sec  7.56 MBytes  63.4 Mbits/sec  503   2.81 KBytes
>>>> [  4]   6.00-7.00   sec  3.13 MBytes  26.2 Mbits/sec  216   1.41 KBytes
>>>> [  4]   7.00-8.00   sec   665 KBytes  5.45 Mbits/sec   58   2.81 KBytes
>>>> [  4]   8.00-9.00   sec  7.97 MBytes  66.9 Mbits/sec  554   7.03 KBytes
>>>> [  4]   9.00-10.00  sec  1.42 MBytes  11.9 Mbits/sec  137   2.81 KBytes
>>>> - - - - - - - - - - - - - - - - - - - - - - - - -
>>>> [ ID] Interval           Transfer     Bandwidth       Retr
>>>> [  4]   0.00-10.00  sec  39.9 MBytes  33.5 Mbits/sec 2781            
>>>> sender
>>>> [  4]   0.00-10.00  sec  39.6 MBytes  33.2 Mbits/sec                 
>>>> receiver
>>>>
>>>> DOWN:
>>>>
>>>> [ ID] Interval           Transfer     Bandwidth
>>>> [  4]   0.00-1.00   sec  55.2 MBytes   463 Mbits/sec
>>>> [  4]   1.00-2.00   sec  58.4 MBytes   490 Mbits/sec
>>>> [  4]   2.00-3.00   sec  55.3 MBytes   464 Mbits/sec
>>>> [  4]   3.00-4.00   sec  55.4 MBytes   465 Mbits/sec
>>>> [  4]   4.00-5.00   sec  55.8 MBytes   468 Mbits/sec
>>>> [  4]   5.00-6.00   sec  56.1 MBytes   471 Mbits/sec
>>>> [  4]   6.00-7.00   sec  55.1 MBytes   463 Mbits/sec
>>>> [  4]   7.00-8.00   sec  55.6 MBytes   466 Mbits/sec
>>>> [  4]   8.00-9.00   sec  55.3 MBytes   464 Mbits/sec
>>>> [  4]   9.00-10.00  sec  55.4 MBytes   465 Mbits/sec
>>>> - - - - - - - - - - - - - - - - - - - - - - - - -
>>>> [ ID] Interval           Transfer     Bandwidth       Retr
>>>> [  4]   0.00-10.00  sec   559 MBytes   469 Mbits/sec 0            
>>>> sender
>>>> [  4]   0.00-10.00  sec   559 MBytes   469 Mbits/sec                 
>>>> receiver
>>>
>>> Hi,
>>>
>>> I think the U-Boot should not influence this.
>>>
>>> @Gred could you please remove all the patches from
>>> target/linux/sunxi/patches-4.9/ and test with such an image and then
>>> report back your results please? It could be that something when wrong
>>> when I backported some clock patches.
>>>
>>> Hauke
>>
>> Hi Gerd,
>>
>> Could you please also test in addition my sunxi feature branch here:
>> https://git.lede-project.org/?p=lede/hauke/staging.git;a=shortlog;h=refs/heads/sunxi
>>
>>
>> It contains an updated version of the stmmac driver, I did this mostly
>> to add support for the A64, but it could also fix your problems.
>>
>> Hauke
> 
> thanks for your assistance.
> 
> I've tested both versions, stock Lede HEAD without patches and your git.
> Both showing the same problem with packet lost and poor upload bandwidth.
> 
> 
> Regards
> 
> Gerd

Ok they I can probably not help any more, this looks more like a bug in
the upstream kernel introduced between kernel 4.4 and 4.9. It probably
makes sense to talk directly to the Linux stmmac maintainers about this
problem.

Hauke