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tcp: move inet->rx_dst_ifindex to sk->sk_rx_dst_ifindex

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Increase cache locality by moving rx_dst_ifindex next to sk->sk_rx_dst

This is part of an effort to reduce cache line misses in TCP fast path.

This removes one cache line miss in early demux.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet
2021-10-25 09:48:16 -07:00
committed by Jakub Kicinski
parent fd559a943e
commit 0c0a5ef809
4 changed files with 10 additions and 8 deletions
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3
include/net/inet_sock.h
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@ -207,11 +207,10 @@ struct inet_sock {
__be32 inet_saddr;
__s16 uc_ttl;
__u16 cmsg_flags;
struct ip_options_rcu __rcu *inet_opt;
__be16 inet_sport;
__u16 inet_id;
struct ip_options_rcu __rcu *inet_opt;
int rx_dst_ifindex;
__u8 tos;
__u8 min_ttl;
__u8 mc_ttl;