linux-kernel - Re: [PATCH net-next v4 05/12] net: ethernet: oa_tc6: implement error interrupts unmasking

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Date: Fri, 3 May 2024 07:10:05 +0000
From: <Parthiban.Veerasooran@...rochip.com>
To: <ramon.nordin.rodriguez@...roamp.se>
CC: <andrew@...n.ch>, <davem@...emloft.net>, <edumazet@...gle.com>,
	<kuba@...nel.org>, <pabeni@...hat.com>, <horms@...nel.org>,
	<saeedm@...dia.com>, <anthony.l.nguyen@...el.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <corbet@....net>,
	<linux-doc@...r.kernel.org>, <robh+dt@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
	<devicetree@...r.kernel.org>, <Horatiu.Vultur@...rochip.com>,
	<ruanjinjie@...wei.com>, <Steen.Hegelund@...rochip.com>,
	<vladimir.oltean@....com>, <UNGLinuxDriver@...rochip.com>,
	<Thorsten.Kummermehr@...rochip.com>, <Pier.Beruto@...emi.com>,
	<Selvamani.Rajagopal@...emi.com>, <Nicolas.Ferre@...rochip.com>,
	<benjamin.bigler@...nformulastudent.ch>
Subject: Re: [PATCH net-next v4 05/12] net: ethernet: oa_tc6: implement error
 interrupts unmasking

On 02/05/24 3:49 pm, Ramón Nordin Rodriguez wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
>> I tried to reproduce the issue in my setup with your above applications.
>> But surprisingly I couldn't reproduce the issue you are facing.
>>
>> One end is Raspberry Pi 4 with lan8651 MAC-PHY and the other end is
>> Raspberry Pi 4 with EVB-LAN8670-USB Stick.
>>
>> lan8651 MAC-PHY side:
>> ---------------------
>>
> 
> Did you run both client and server on both ends? The previous tests I
> have done have only sent traffic in one direction, which did not lead to
> a live lock.
> But both sending and receiving as fast as possible in both directions
> trigger the problems on my end.
OK, today I executed both the client and server on both the sides. It is 
running more than an hour, it didn't crash. But there are some "Receive 
buffer overflow error" time to time in the dmesg. I don't know whether 
this is an expected behavior with this type of stress test.

top output:
-----------

pi@...pberrypi:~/lan865x/v4_mainline $ top

top - 19:47:07 up 54 min,  5 users,  load average: 1.23, 1.20, 1.14
Tasks: 205 total,   1 running, 204 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.3 us,  7.5 sy,  0.0 ni, 92.1 id,  0.0 wa,  0.0 hi,  0.2 si, 
0.0 st
MiB Mem :   7810.0 total,   7013.5 free,    402.6 used,    518.0 
buff/cache
MiB Swap:    100.0 total,    100.0 free,      0.0 used.   7407.5 avail Mem

     PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ 
COMMAND 

    7218 root     -51   0       0      0      0 D  28.6   0.0  13:51.12 
oa-tc6-spi-thread 

   63853 vnc       20   0    2320    384    384 S   0.7   0.0   0:00.23 
sh 

   65090 pi        20   0   11728   4992   2816 R   0.7   0.1   0:00.04 
top 

      17 root      20   0       0      0      0 I   0.3   0.0   0:01.74 
rcu_preempt 

      27 root      20   0       0      0      0 S   0.3   0.0   0:16.67 
ksoftirqd/2 

     268 root      20   0   50024  16132  15108 S   0.3   0.2   0:02.02 
systemd-journal 

     956 pi        20   0  699196  37896  29160 S   0.3   0.5   0:03.60 
wireplumber 

    7328 pi        20   0   16280   9216   5248 S   0.3   0.1   0:07.61 
python3 

       1 root      20   0  168692  11340   8320 S   0.0   0.1   0:03.67 
systemd 

       2 root      20   0       0      0      0 S   0.0   0.0   0:00.01 
kthreadd

ifconfig output:
----------------

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
         inet 192.168.5.100  netmask 255.255.255.0  broadcast 0.0.0.0
         ether 04:05:06:01:02:03  txqueuelen 1000  (Ethernet)
         RX packets 1944541  bytes 909191168 (867.0 MiB)
         RX errors 0  dropped 2  overruns 0  frame 0
         TX packets 2402855  bytes 3129162624 (2.9 GiB)
         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
         device interrupt 55

dmesg output:
-------------

[  285.482275] LAN865X Rev.B0 Internal Phy spi0.0:00: attached PHY 
driver (mii_bus:phy_addr=spi0.0:00, irq=POLL)
[  285.534760] lan865x spi0.0 eth1: Link is Up - 10Mbps/Half - flow 
control off
[  341.466221] eth1: Receive buffer overflow error
[  345.730222] eth1: Receive buffer overflow error
[  345.891126] eth1: Receive buffer overflow error
[  346.074220] eth1: Receive buffer overflow error
[  354.374223] eth1: Receive buffer overflow error
[  354.375422] eth1: Receive buffer overflow error
[  355.786219] eth1: Receive buffer overflow error
[  356.898221] eth1: Receive buffer overflow error
[  357.782219] eth1: Receive buffer overflow error
[  357.783194] eth1: Receive buffer overflow error
[  365.446224] eth1: Receive buffer overflow error
[  387.722221] eth1: Receive buffer overflow error
[  387.790218] eth1: Receive buffer overflow error
[  387.950224] eth1: Receive buffer overflow error
[  387.951199] eth1: Receive buffer overflow error
[  388.790219] eth1: Receive buffer overflow error
[  389.010220] eth1: Receive buffer overflow error
[  391.066221] eth1: Receive buffer overflow error
[  409.746225] eth1: Receive buffer overflow error
[  442.835278] eth1: Receive buffer overflow error
[  447.410222] eth1: Receive buffer overflow error
[  447.510220] eth1: Receive buffer overflow error
[  447.758219] eth1: Receive buffer overflow error
[  448.066221] eth1: Receive buffer overflow error
[  449.590220] eth1: Receive buffer overflow error
[  450.686221] eth1: Receive buffer overflow error
[  451.238222] eth1: Receive buffer overflow error
[  451.490220] eth1: Receive buffer overflow error
[  472.254221] eth1: Receive buffer overflow error
[  473.302222] eth1: Receive buffer overflow error
[  474.070220] eth1: Receive buffer overflow error
[  475.262220] eth1: Receive buffer overflow error
[  475.362223] eth1: Receive buffer overflow error
[  477.362224] eth1: Receive buffer overflow error
[  501.918221] eth1: Receive buffer overflow error
[  505.510219] eth1: Receive buffer overflow error
[  516.466220] eth1: Receive buffer overflow error
[  600.830221] eth1: Receive buffer overflow error
[  675.614219] eth1: Receive buffer overflow error
[  676.318223] eth1: Receive buffer overflow error
[  676.594223] eth1: Receive buffer overflow error
[  678.702219] eth1: Receive buffer overflow error
[  679.102219] eth1: Receive buffer overflow error
[  679.642218] eth1: Receive buffer overflow error
[  679.894218] eth1: Receive buffer overflow error
[  679.906224] eth1: Receive buffer overflow error
[  682.529386] eth1: Receive buffer overflow error
[  682.786221] eth1: Receive buffer overflow error
[  703.374220] eth1: Receive buffer overflow error
[  703.462219] eth1: Receive buffer overflow error
[  716.606222] eth1: Receive buffer overflow error
[  717.134219] eth1: Receive buffer overflow error
[  722.838219] eth1: Receive buffer overflow error
[  801.522220] eth1: Receive buffer overflow error
[  871.946226] eth1: Receive buffer overflow error
[ 1304.190220] eth1: Receive buffer overflow error
[ 1307.734221] eth1: Receive buffer overflow error
[ 1309.738224] eth1: Receive buffer overflow error
[ 1605.222219] eth1: Receive buffer overflow error
[ 1739.927121] eth1: Receive buffer overflow error
[ 2240.002213] eth1: Receive buffer overflow error
[ 2241.355378] eth1: Receive buffer overflow error
[ 2300.374218] eth1: Receive buffer overflow error
[ 2332.850214] eth1: Receive buffer overflow error
[ 2347.322215] eth1: Receive buffer overflow error
[ 2377.702216] eth1: Receive buffer overflow error
[ 2393.942214] eth1: Receive buffer overflow error
[ 2404.986214] eth1: Receive buffer overflow error
[ 2407.538216] eth1: Receive buffer overflow error
[ 2407.539190] eth1: Receive buffer overflow error
[ 2411.266213] eth1: Receive buffer overflow error
[ 2421.542220] eth1: Receive buffer overflow error
[ 2713.142214] eth1: Receive buffer overflow error
[ 3401.226215] eth1: Receive buffer overflow error
[ 3494.394214] eth1: Receive buffer overflow error
[ 3511.850214] eth1: Receive buffer overflow error


Best regards,
Parthiban V
> R
>