Change Details

1) prefetch 128 bytes of mbufs 2) Re-order filling the pkt_info so cache stalls happen at the end 3) Define empty prefetch2() macro when the function isn't present.

1) If the packet is smaller than MTU, disable the TSO flags. 2) Move TCP header parsing inside the IS_TSO?() test. 3) Add a new IFLIB_NEED_ZERO_CSUM flag to indicate the checksums need to be zeroed before TX.

1) prefetch 128 bytes of mbufs1) If the packet is smaller than MTU, disable the TSO flags. 2) Re-order filling the pkt_info so cache stalls happen at the end2) Move TCP header parsing inside the IS_TSO?() test. 3) Define empty prefetch2() macro when3) Add a new IFLIB_NEED_ZERO_CSUM flag to indicate the function isn't presentchecksums need to be zeroed before TX.