From f41e9e3d488a55664ec1800196eff608c441967d Mon Sep 17 00:00:00 2001
From: phk <phk@d4fa192b-c00b-0410-8231-f00ffab90ce4>
Date: Thu, 12 Feb 2009 22:26:44 +0000
Subject: [PATCH] Move the LRU timestamp from the objcore to the object, we
 only access it when we have used the object anyway.

git-svn-id: svn+ssh://projects.linpro.no/svn/varnish/trunk@3757 d4fa192b-c00b-0410-8231-f00ffab90ce4
---
 varnish-cache/bin/varnishd/cache.h        |  4 ++--
 varnish-cache/bin/varnishd/cache_center.c |  4 +++-
 varnish-cache/bin/varnishd/cache_expire.c | 16 ++++++++--------
 3 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/varnish-cache/bin/varnishd/cache.h b/varnish-cache/bin/varnishd/cache.h
index e8486542..0101ee34 100644
--- a/varnish-cache/bin/varnishd/cache.h
+++ b/varnish-cache/bin/varnishd/cache.h
@@ -267,7 +267,6 @@ struct objcore {
 	VTAILQ_ENTRY(objcore)	list;
 	VTAILQ_ENTRY(objcore)	lru_list;
 	int			on_lru;
-	double			lru_stamp;
 };
 
 /* Object structure --------------------------------------------------*/
@@ -302,6 +301,7 @@ struct object {
 	double			prefetch;
 
 	double			last_modified;
+	double			last_lru;
 
 	struct http		http[1];
 
@@ -463,7 +463,7 @@ extern pthread_t cli_thread;
 void EXP_Insert(struct object *o);
 void EXP_Init(void);
 void EXP_Rearm(const struct object *o);
-void EXP_Touch(const struct object *o, double now);
+int EXP_Touch(const struct object *o);
 int EXP_NukeOne(struct sess *sp);
 
 /* cache_fetch.c */
diff --git a/varnish-cache/bin/varnishd/cache_center.c b/varnish-cache/bin/varnishd/cache_center.c
index fea97a13..895c2061 100644
--- a/varnish-cache/bin/varnishd/cache_center.c
+++ b/varnish-cache/bin/varnishd/cache_center.c
@@ -159,8 +159,10 @@ cnt_deliver(struct sess *sp)
 
 	sp->t_resp = TIM_real();
 	if (sp->obj->objhead != NULL) {
+		if ((sp->t_resp - sp->obj->last_lru) > params->lru_timeout &&
+		    EXP_Touch(sp->obj))
+			sp->obj->last_lru = sp->t_resp;	/* XXX: locking ? */
 		sp->obj->last_use = sp->t_resp;	/* XXX: locking ? */
-		EXP_Touch(sp->obj, sp->t_resp);
 	}
 	RES_BuildHttp(sp);
 	VCL_deliver_method(sp);
diff --git a/varnish-cache/bin/varnishd/cache_expire.c b/varnish-cache/bin/varnishd/cache_expire.c
index 315b65ea..8d14e89a 100644
--- a/varnish-cache/bin/varnishd/cache_expire.c
+++ b/varnish-cache/bin/varnishd/cache_expire.c
@@ -133,7 +133,7 @@ EXP_Insert(struct object *o)
 	oc = o->objcore;
 
 	assert(o->entered != 0 && !isnan(o->entered));
-	oc->lru_stamp = o->entered;
+	o->last_lru = o->entered;
 	Lck_Lock(&exp_mtx);
 	assert(oc->timer_idx == BINHEAP_NOIDX);
 	(void)update_object_when(o);
@@ -153,27 +153,27 @@ EXP_Insert(struct object *o)
  * that can be worked around by examining obj.last_use in vcl_discard{}
  */
 
-void
-EXP_Touch(const struct object *o, double now)
+int
+EXP_Touch(const struct object *o)
 {
 	struct objcore *oc;
+	int retval = 0;
 
 	CHECK_OBJ_NOTNULL(o, OBJECT_MAGIC);
 	oc = o->objcore;
 	if (oc == NULL)
-		return;
+		return (retval);
 	CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC);
-	if (oc->lru_stamp + params->lru_timeout > now)
-		return;
 	if (Lck_Trylock(&exp_mtx))
-		return;
+		return (retval);
 	if (oc->on_lru) {
 		VTAILQ_REMOVE(&lru, oc, lru_list);
 		VTAILQ_INSERT_TAIL(&lru, oc, lru_list);
-		oc->lru_stamp = now;
 		VSL_stats->n_lru_moved++;
+		retval = 1;
 	}
 	Lck_Unlock(&exp_mtx);
+	return (retval);
 }
 
 /*--------------------------------------------------------------------
-- 
2.39.5