netdev - Re: [net-next, v2, 1/2] net: stmmac: Rework coalesce timer and fix multi-queue races

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Date:   Wed, 12 Sep 2018 15:50:20 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Jose Abreu <Jose.Abreu@...opsys.com>, netdev@...r.kernel.org
Cc:     Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        "David S. Miller" <davem@...emloft.net>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>
Subject: Re: [net-next, v2, 1/2] net: stmmac: Rework coalesce timer and fix
 multi-queue races

Hi Jose,

On 11/09/2018 10:17, Jose Abreu wrote:
> On 10-09-2018 19:15, Neil Armstrong wrote:
>>
>> RX is still ok but now TX fails almost immediately...
>>
>> With 100ms report :
>>
>> $ iperf3 -c 192.168.1.47 -t 0 -p 5202 -R -i 0.1
>> Connecting to host 192.168.1.47, port 5202
>> Reverse mode, remote host 192.168.1.47 is sending
>> [  4] local 192.168.1.45 port 45900 connected to 192.168.1.47 port 5202
>> [ ID] Interval           Transfer     Bandwidth
>> [  4]   0.00-0.10   sec  10.9 MBytes   913 Mbits/sec
>> [  4]   0.10-0.20   sec  11.0 MBytes   923 Mbits/sec
>> [  4]   0.20-0.30   sec  6.34 MBytes   532 Mbits/sec
>> [  4]   0.30-0.40   sec  0.00 Bytes  0.00 bits/sec
>> [  4]   0.40-0.50   sec  0.00 Bytes  0.00 bits/sec
>> [  4]   0.50-0.60   sec  0.00 Bytes  0.00 bits/sec
>> [  4]   0.60-0.70   sec  0.00 Bytes  0.00 bits/sec
>> [  4]   0.70-0.80   sec  0.00 Bytes  0.00 bits/sec
>> [  4]   0.80-0.90   sec  0.00 Bytes  0.00 bits/sec
>> [  4]   0.90-1.00   sec  0.00 Bytes  0.00 bits/sec
>> [  4]   1.00-1.10   sec  0.00 Bytes  0.00 bits/sec
>> ^C[  4]   1.10-1.10   sec  0.00 Bytes  0.00 bits/sec
>> - - - - - - - - - - - - - - - - - - - - - - - - -
>> [ ID] Interval           Transfer     Bandwidth
>> [  4]   0.00-1.10   sec  0.00 Bytes  0.00 bits/sec                  sender
>> [  4]   0.00-1.10   sec  28.2 MBytes   214 Mbits/sec                  receiver
>> iperf3: interrupt - the client has terminated
>>
>> Neil
> 
> Ok, here goes another incremental patch. If this doesn't work can
> you please send me a link to the spec of the board you are using ?

Sorry for the delay...

Not better, sorry.

$ iperf3 -c 10.1.3.201 -p 5202 -R -t 0
Connecting to host 10.1.3.201, port 5202
Reverse mode, remote host 10.1.3.201 is sending
[  4] local 10.1.2.12 port 60612 connected to 10.1.3.201 port 5202
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec   110 MBytes   920 Mbits/sec
[  4]   1.00-2.00   sec   110 MBytes   926 Mbits/sec
[  4]   2.00-3.00   sec  1.94 MBytes  16.3 Mbits/sec
[  4]   3.00-4.00   sec  0.00 Bytes  0.00 bits/sec
^C[  4]   4.00-4.76   sec  0.00 Bytes  0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-4.76   sec  0.00 Bytes  0.00 bits/sec                  sender
[  4]   0.00-4.76   sec   222 MBytes   391 Mbits/sec                  receiver
iperf3: interrupt - the client has terminated

The board is the Amlogic S400 with the A113D SoC, sorry there is no public spec for this board and for this SoC.

Neil

> 
> Thanks and Best Regards,
> Jose Miguel Abreu
>