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author | David S. Miller <davem@davemloft.net> | 2021-03-14 14:48:26 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2021-03-14 14:48:26 -0700 |
commit | c6baf7eeb0cf82f6a90a703f6548250fc85cfdcc (patch) | |
tree | c6bf285f9bd54f1a0b57d604226f34895f4034f2 /include/net/flow_dissector.h | |
parent | 3f79eb3c3a6abaa8f9900b5e40994060d7341cbc (diff) | |
parent | d206121faf8bb2239cd970af0bd32f5203780427 (diff) | |
download | linux-c6baf7eeb0cf82f6a90a703f6548250fc85cfdcc.tar.bz2 |
Merge branch 'skbuff-micro-optimize-flow-dissection'
Alexander Lobakin says:
====================
skbuff: micro-optimize flow dissection
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.
From v2 [1]:
- reword some commit messages as a potential fix for NIPA;
- no functional changes.
From 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;
- no other changes.
[0] https://lore.kernel.org/netdev/20210312194538.337504-1-alobakin@pm.me
[1] https://lore.kernel.org/netdev/20210313113645.5949-1-alobakin@pm.me
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/flow_dissector.h')
-rw-r--r-- | include/net/flow_dissector.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h index cc10b10dc3a1..ffd386ea0dbb 100644 --- a/include/net/flow_dissector.h +++ b/include/net/flow_dissector.h @@ -350,7 +350,7 @@ static inline bool flow_keys_have_l4(const struct flow_keys *keys) u32 flow_hash_from_keys(struct flow_keys *keys); void skb_flow_get_icmp_tci(const struct sk_buff *skb, struct flow_dissector_key_icmp *key_icmp, - void *data, int thoff, int hlen); + const void *data, int thoff, int hlen); static inline bool dissector_uses_key(const struct flow_dissector *flow_dissector, enum flow_dissector_key_id key_id) @@ -368,8 +368,8 @@ static inline void *skb_flow_dissector_target(struct flow_dissector *flow_dissec struct bpf_flow_dissector { struct bpf_flow_keys *flow_keys; const struct sk_buff *skb; - void *data; - void *data_end; + const void *data; + const void *data_end; }; static inline void |