Add a counter for shmlog wraparounds.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2993 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/shmlog.c

@@ -74,6 +74,7 @@ vsl_wrap(void)
 	*logstart = SLT_ENDMARKER;
 	logstart[loghead->ptr] = SLT_WRAPMARKER;
 	loghead->ptr = 0;
+	VSL_stats->shm_cycles++;
 }
 
 static void

include/stat_field.h

@@ -92,6 +92,7 @@ MAC_STAT(shm_records,		uint64_t, 'a', "SHM records")
 MAC_STAT(shm_writes,		uint64_t, 'a', "SHM writes")
 MAC_STAT(shm_flushes,		uint64_t, 'a', "SHM flushes due to overflow")
 MAC_STAT(shm_cont,		uint64_t, 'a', "SHM MTX contention")
+MAC_STAT(shm_cycles,		uint64_t, 'a', "SHM cycles through buffer")
 
 MAC_STAT(sm_nreq,		uint64_t, 'a', "allocator requests")
 MAC_STAT(sm_nobj,		uint64_t, 'i', "outstanding allocations")