e1000e 网卡如遇到大包(>1280)未线速，把'DEFAULT_ITR'改为0, 不设中断频率上限试试
see@intel/e1000e/param.c
/* Interrupt Throttle Rate (interrupts/sec)
*
* Valid Range: 100-100000 or one of: 0=off, 1=dynamic, 3=dynamic conservative
*/
E1000_PARAM(InterruptThrottleRate, "Interrupt Throttling Rate");
#define DEFAULT_ITR 0 //默认3，改为0