This Stack is optimized on Intel architecture platform with Intel I210/I211 network adapter which is based on IgH EtherCAT Master stack 1.5.2. it better supports Xenomai3/Preempt RT with Linux kernel 4.x and has shown good real-time performance. It includes a few optimization as below: 1. Support Linux Kernel 4.x 2. Support Xenomai 3 and Preempt RT 3. Migrate Operation thread to cobalt 4. Migrate IGB driver to Stack