From: Willy Tarreau <w@1wt.eu>
Date: Sun, 26 Nov 2017 09:50:36 +0000 (+0100)
Subject: CLEANUP: pools: align pools on a cache line
X-Git-Tag: v1.8.0~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ca1b70cf937791011dd7cc607ceeffeabf7ac45;p=thirdparty%2Fhaproxy.git

CLEANUP: pools: align pools on a cache line

There are just a few pools, and they're stressed a lot, so it makes
sense to dedicate them a cache line to avoid contention and to place
the lock at the beginning.
---

diff --git a/include/common/memory.h b/include/common/memory.h
index 5096125234..80078558b6 100644
--- a/include/common/memory.h
+++ b/include/common/memory.h
@@ -48,8 +48,8 @@
 #endif
 
 struct pool_head {
-	void **free_list;
 	__decl_hathreads(HA_SPINLOCK_T lock); /* the spin lock */
+	void **free_list;
 	struct list list;	/* list of all known pools */
 	unsigned int used;	/* how many chunks are currently in use */
 	unsigned int allocated;	/* how many chunks have been allocated */
@@ -60,7 +60,7 @@ struct pool_head {
 	unsigned int users;	/* number of pools sharing this zone */
 	unsigned int failed;	/* failed allocations */
 	char name[12];		/* name of the pool */
-};
+} __attribute__((aligned(64)));
 
 /* poison each newly allocated area with this byte if >= 0 */
 extern int mem_poison_byte;