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Code Issues Releases Wiki Activity

tcp: move tp->scaling_ratio to tcp_sock_read_txrx group

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tp->scaling_ratio is a read mostly field, used in rx and tx fast paths.

Fixes: d5fed5addb ("tcp: reorganize tcp_sock fast path variables")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Coco Li <lixiaoyan@google.com>
Cc: Wei Wang <weiwan@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2024-02-08 14:43:21 +00:00 committed by David S. Miller
parent 78e563f2d6
commit 119ff04864
3 changed files with 4 additions and 3 deletions
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2
Documentation/networking/net_cachelines/tcp_sock.rst
View file

@ -38,7 +38,7 @@ u32 max_window read_mostly -
u32 mss_cache read_mostly read_mostly tcp_rate_check_app_limited,tcp_current_mss,tcp_sync_mss,tcp_sndbuf_expand,tcp_tso_should_defer(tx);tcp_update_pacing_rate,tcp_clean_rtx_queue(rx)
u32 window_clamp read_mostly read_write tcp_rcv_space_adjust,__tcp_select_window
u32 rcv_ssthresh read_mostly - __tcp_select_window
u82 scaling_ratio
u8 scaling_ratio read_mostly read_mostly tcp_win_from_space
struct tcp_rack
u16 advmss - read_mostly tcp_rcv_space_adjust
u8 compressed_ack

2
include/linux/tcp.h
View file

@ -221,6 +221,7 @@ struct tcp_sock {
u32 lost_out; /* Lost packets */
u32 sacked_out; /* SACK'd packets */
u16 tcp_header_len; /* Bytes of tcp header to send */
u8 scaling_ratio; /* see tcp_win_from_space() */
u8 chrono_type : 2, /* current chronograph type */
repair : 1,
is_sack_reneg:1, /* in recovery from loss with SACK reneg? */
@ -352,7 +353,6 @@ struct tcp_sock {
u32 compressed_ack_rcv_nxt;
struct list_head tsq_node; /* anchor in tsq_tasklet.head list */
u8 scaling_ratio; /* see tcp_win_from_space() */
/* Information of the most recently (s)acked skb */
struct tcp_rack {
u64 mstamp; /* (Re)sent time of the skb */

3
net/ipv4/tcp.c
View file

@ -4615,7 +4615,8 @@ static void __init tcp_struct_check(void)
CACHELINE_ASSERT_GROUP_MEMBER(struct tcp_sock, tcp_sock_read_txrx, prr_out);
CACHELINE_ASSERT_GROUP_MEMBER(struct tcp_sock, tcp_sock_read_txrx, lost_out);
CACHELINE_ASSERT_GROUP_MEMBER(struct tcp_sock, tcp_sock_read_txrx, sacked_out);
CACHELINE_ASSERT_GROUP_SIZE(struct tcp_sock, tcp_sock_read_txrx, 31);
CACHELINE_ASSERT_GROUP_MEMBER(struct tcp_sock, tcp_sock_read_txrx, scaling_ratio);
CACHELINE_ASSERT_GROUP_SIZE(struct tcp_sock, tcp_sock_read_txrx, 32);
/* RX read-mostly hotpath cache lines */
CACHELINE_ASSERT_GROUP_MEMBER(struct tcp_sock, tcp_sock_read_rx, copied_seq);