korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-18 09:44:18 +08:00
Code Issues Packages Projects Releases Wiki Activity

netfilter: xt_rateest: Better struct xt_rateest layout

Browse Source 
We currently dirty two cache lines in struct xt_rateest, this hurts SMP
performance.

This patch moves lock/bstats/rstats at beginning of structure so that
they share a single cache line.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Eric Dumazet 2010-06-08 14:11:19 +02:00 committed by Patrick McHardy
parent e12f8e29a8
commit 339bb99e4a
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
include/net/netfilter/xt_rateest.h
View File

@ -2,13 +2,17 @@
#define _XT_RATEEST_H
struct xt_rateest {
/* keep lock and bstats on same cache line to speedup xt_rateest_tg() */
struct gnet_stats_basic_packed bstats;
spinlock_t lock;
/* keep rstats and lock on same cache line to speedup xt_rateest_mt() */
struct gnet_stats_rate_est rstats;
/* following fields not accessed in hot path */
struct hlist_node list;
char name[IFNAMSIZ];
unsigned int refcnt;
spinlock_t lock;
struct gnet_estimator params;
struct gnet_stats_rate_est rstats;
struct gnet_stats_basic_packed bstats;
};
extern struct xt_rateest *xt_rateest_lookup(const char *name);