Hi wb,
I check the code, there is a macro RX_WTHRESH which was defined as 4, with the comment "/*< Default value of RX write-back threshold register. */". I don't know whether it is correlation with the problem. So I modify it to 0 in our code, but it doesn't take effect ether. then I check the code in i40e_rxtx.c, function i40e_dev_rx_queue_setup doesn't use this field(rx_conf.rx_thresh), so I want to know this register is correlation with this problem or not, if yes, how to set this register?
Thank you very much!