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Re: stmmac: Performance regression after commit aff3d9eff843 "net: stmmac: enable multiple buffers"

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Às 10:20 AM de 3/23/2017, Corentin Labbe escreveu:
> On Thu, Mar 23, 2017 at 10:12:18AM +0000, Joao Pinto wrote:
>>
>> Hi Corentin,
>>
>> Às 10:08 AM de 3/23/2017, Corentin Labbe escreveu:
>>> Hello
>>>
>>> Using next-20170323 produce a huge performance regression on my sunxi boards.
>>> On dwmac-sun8i, iperf goes from 94mbs/s to 37 when sending.
>>>
>>> On cubieboard2(dwmac-sunxi), iperf made the kernel flood with "ndesc_get_rx_status: Oversized frame spanned multiple buffers"
>>> and network is lost after.
>>>
>>> Reverting aff3d9eff84399e433c4aca65a9bb236581bc082 fix the issue.
>>> I still try to found which part of this patch mades the performance lower.
>>>
>>> Regards
>>> Corentin Labbe
>>>
>>
>> I have a 4.21 QoS Core with 4 RX + 4 TX and detected no regression.
>> Could you please share the iperf cmds you are using in order for me to reproduce
>> in my side?
> 
> simple iperf -c serverip for both board
> 

Ok, I am going to run my tests with a fresh net-next and come back to you soon.

Thanks,
Joao

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stmmac: Performance regression after commit aff3d9eff843 "net:  stmmac: enable multiple buffers" Corentin Labbe <clabbe.montjoie@gmail.com> - 2017-03-23 11:10 +0100
  Re: stmmac: Performance regression after commit aff3d9eff843 "net:  stmmac: enable multiple buffers" Joao Pinto <Joao.Pinto@synopsys.com> - 2017-03-23 11:20 +0100
    Re: stmmac: Performance regression after commit aff3d9eff843 "net:  stmmac: enable multiple buffers" Corentin Labbe <clabbe.montjoie@gmail.com> - 2017-03-23 11:30 +0100
      Re: stmmac: Performance regression after commit aff3d9eff843 "net:  stmmac: enable multiple buffers" Giuseppe CAVALLARO <peppe.cavallaro@st.com> - 2017-03-23 11:50 +0100
        Re: stmmac: Performance regression after commit aff3d9eff843 "net:  stmmac: enable multiple buffers" Joao Pinto <Joao.Pinto@synopsys.com> - 2017-03-23 12:00 +0100
          Re: stmmac: Performance regression after commit aff3d9eff843 "net:  stmmac: enable multiple buffers" Joao Pinto <Joao.Pinto@synopsys.com> - 2017-03-23 14:00 +0100
        Re: stmmac: Performance regression after commit aff3d9eff843 "net:  stmmac: enable multiple buffers" Joao Pinto <Joao.Pinto@synopsys.com> - 2017-03-23 12:00 +0100
        Re: stmmac: Performance regression after commit aff3d9eff843 "net:  stmmac: enable multiple buffers" Giuseppe CAVALLARO <peppe.cavallaro@st.com> - 2017-03-23 12:00 +0100
      Re: stmmac: Performance regression after commit aff3d9eff843 "net:  stmmac: enable multiple buffers" Joao Pinto <Joao.Pinto@synopsys.com> - 2017-03-23 11:50 +0100

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