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Date:   Thu, 14 Feb 2019 08:21:26 +0100
From:   Simon Huelck <>
To:     Jose Abreu <>,
        Martin Blumenstingl <>
Cc:     Emiliano Ingrassia <>,,,,
Subject: Re: stmmac / meson8b-dwmac


i used iperf2 on my odroid c2 , since this can do duplex tests ! iperf2 -c
-i1 -d

Do you really need the exact numbers ?

4.14.29 reached 930 MBits without the -d ( duplex option ), 5.0rc5 only
reaches 600MBits there

With the -d option things get worse on 4.14.29 , 600MBits in both
directions. on 5.0rc5 this is the 500 to 600 in one direction, the other
only 150MBits.

iperf3 is not duplex capable, i didnt test the reverse option, but
duplex tests show that one direction drops in performance when the other
is busy.

Do you really need the exact output ? I need to reflash my box then
..... if needed i would do so.


Am 11.02.2019 um 14:44 schrieb Jose Abreu:
> Hello,
> On 2/9/2019 1:09 AM, Martin Blumenstingl wrote:
>> (it's interesting that the sending direction has 445 retries)
> I saw this before and I think it was related with COE. Can you
> please disable all offloading and try again?
> Anyway, maybe Simon should bissect ? I think since 4.14 there are
> not that many commits in stmmac / meson8b-dwmac that can cause
> this behavior.
> Thanks,
> Jose Miguel Abreu

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