i.MX6 FEC fifo overrun

[torus1000]

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.

[weidong_sun]

Hello torus1000,

     We have a description on FEC speed in Errata, see following, please!

Hope the information is helpful for you!

Best Regards,

Weidong