Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-15 09:34:17 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

tcp/dccp: cache line align inet_hashinfo

Browse Source 
I have seen tcp_hashinfo starting at a non optimal location,
forcing input handlers to pull two cache lines instead of one,
and sharing a cache line that was dirtied more than necessary:

ffffffff83680600 b tcp_orphan_timer
ffffffff83680628 b tcp_orphan_cache
ffffffff8368062c b tcp_enable_tx_delay.__tcp_tx_delay_enabled
ffffffff83680630 B tcp_hashinfo
ffffffff83680680 b tcp_cong_list_lock

After this patch, ehash, ehash_locks, ehash_mask and ehash_locks_mask
are located in a read-only cache line.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2023-08-03 07:53:34 +00:00 committed by David S. Miller
parent 62c1bff593
commit 6f5ca184cb
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/inet_hashtables.h
View File

@ -177,7 +177,7 @@ struct inet_hashinfo {
struct inet_listen_hashbucket *lhash2;
bool pernet;
};
} ____cacheline_aligned_in_smp;
static inline struct inet_hashinfo *tcp_or_dccp_get_hashinfo(const struct sock *sk)
{