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i.MX6 FEC fifo overrun

Question asked by torus1000 on Nov 29, 2016
Latest reply on Dec 8, 2016 by Wigros Sun

Hi,

 

I used yocto L3.14.38 for i.MX6Q-SabreSD then measured FEC performance with iperf command.

I believed FEC patch already applied so fifo overrun suppressed with proper pause frames.

https://patchwork.kernel.org/patch/1971731/
But FEC performance looked far poor than 450Mpbs and fifo overrun continuously occurred.
https://boundarydevices.com/i-mx6-ethernet/

 

Is there any control bit to ignore pause frame? (Which registers should I check first?)

How can I improve FEC performance to avoid overrun?

 

Thanks.

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