[master] 2f7cf29 Count the number of times a threadpool runs against the upper limit

[Poul-Henning Kamp]

commit 2f7cf2917239a8f0117945ff5b3d9b724d44dad9
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Wed Sep 11 10:40:26 2013 +0000

    Count the number of times a threadpool runs against the upper limit

diff --git a/bin/varnishd/cache/cache_pool.c b/bin/varnishd/cache/cache_pool.c
index 4e7bd7c..4308fb3 100644
--- a/bin/varnishd/cache/cache_pool.c
+++ b/bin/varnishd/cache/cache_pool.c
@@ -404,8 +404,13 @@ pool_herder(void *priv)
 		}
 
 		Lck_Lock(&pp->mtx);
-		if (!pp->dry)
+		if (!pp->dry) {
 			(void)Lck_CondWait(&pp->herder_cond, &pp->mtx, NULL);
+		} else {
+			/* XXX: unsafe counters */
+			VSC_C_main->threads_limited++;
+			pp->dry = 0;
+		}
 		Lck_Unlock(&pp->mtx);
 	}
 	NEEDLESS_RETURN(NULL);