Guys, We upgraded from 2.6 to 4.9 recently, lots of new stuff to catch up with. Anyway, we found the libpcap is obviously slower than previous version running on 2.6, first thing I am thinking about is enabling memory map at kernel building stage (PACKET_MMAP=true). But seems PACKET_MMAP is not supported at 4.x anymore, I am wondering any guru can help me with following questions:1) how does 4.x enable the memory map?2) any suggestions to tune up speed of libpcap running on 4.x kernel?
Many appreciation,Tao