When I try to use the DCA (Direct Cache Access) function of the 82599 10Gbe NIC, I had difficulty in enableing it. The environment which I operated is as followed.
1.Intel(R) Xeon(R) CPU E5540 @ 2.53GHz
2.Intel 82599 10Gbe NIC and the Driver of ixgbe 3.17
3.DCA is enabled in BIOS .
4.The kernel with linux 3.2.0
I found some guides in the web like How do I enable Intel Direct Cache Access (DCA) with the Linux Myri10GE driver? , I followed it but I just can't make it which botherd me a lot.
So, The question is what should I do to enable DCA (Direct Cache Access) of 82599 ?