From: Alexander Lobakin <alobakin@xxxxx> Date: Sat, 13 Mar 2021 11:37:03 +0000 > This little number makes all of the flow dissection functions take > raw input data pointer as const (1-5) and shuffles the branches in > __skb_header_pointer() according to their hit probability. > > The result is +20 Mbps per flow/core with one Flow Dissector pass > per packet. This affects RPS (with software hashing), drivers that > use eth_get_headlen() on their Rx path and so on. > > Since v1 [0]: > - rebase on top of the latest net-next. This was super-weird, but > I double-checked that the series applies with no conflicts, and > then on Patchwork it didn't; Still failing on Patchwork. I rebased it ten thousand times, rebuilt the patches manually, tried previous stable Git version and the latest CVS snapshot, and always got the same series that successfully applies to next-next. Can you please take a look? > - no other changes. > > [0] https://lore.kernel.org/netdev/20210312194538.337504-1-alobakin@xxxxx > > Alexander Lobakin (6): > flow_dissector: constify bpf_flow_dissector's data pointers > skbuff: make __skb_header_pointer()'s data argument const > flow_dissector: constify raw input @data argument > linux/etherdevice.h: misc trailing whitespace cleanup > ethernet: constify eth_get_headlen()'s @data argument > skbuff: micro-optimize {,__}skb_header_pointer() > > include/linux/etherdevice.h | 4 ++-- > include/linux/skbuff.h | 26 +++++++++++------------ > include/net/flow_dissector.h | 6 +++--- > net/core/flow_dissector.c | 41 +++++++++++++++++++----------------- > net/ethernet/eth.c | 2 +- > 5 files changed, 40 insertions(+), 39 deletions(-) > > -- > 2.30.2 Thanks, Al
