[sgen] Heavy statistic counter for scanning of no-ref objects.

diff --git a/mono/metadata/sgen-marksweep.c b/mono/metadata/sgen-marksweep.c
index 40895f3626d3bafd605e724c2bca5b1b989a03a1..bbb741389a2812f04b3b7c4fd9b99842117b65fa 100644 (file)
--- a/mono/metadata/sgen-marksweep.c
+++ b/mono/metadata/sgen-marksweep.c
@@ -1151,6 +1151,7 @@ static long long stat_optimized_major_mark;
 static long long stat_optimized_major_mark_small;
 static long long stat_optimized_major_mark_large;
 static long long stat_optimized_major_scan;
+static long long stat_optimized_major_scan_no_refs;
 #ifdef DESCRIPTOR_FAST_PATH
 static long long stat_optimized_major_scan_fast;
 static long long stat_optimized_major_scan_slow;
@@ -1360,7 +1361,11 @@ drain_gray_stack (ScanCopyContext ctx)
                }
 #endif
 
-               HEAVY_STAT (++stat_optimized_major_scan);
+#ifdef HEAVY_STATISTICS
+               ++stat_optimized_major_scan;
+               if (!sgen_gc_descr_has_references (desc))
+                       ++stat_optimized_major_scan_no_refs;
+#endif
 
                /* Now scan the object. */
 
@@ -2501,6 +2506,7 @@ sgen_marksweep_init_internal (SgenMajorCollector *collector, gboolean is_concurr
        mono_counters_register ("Optimized major mark small", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_optimized_major_mark_small);
        mono_counters_register ("Optimized major mark large", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_optimized_major_mark_large);
        mono_counters_register ("Optimized major scan", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_optimized_major_scan);
+       mono_counters_register ("Optimized major scan no refs", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_optimized_major_scan_no_refs);
 #ifdef DESCRIPTOR_FAST_PATH
        mono_counters_register ("Optimized major scan slow", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_optimized_major_scan_slow);
        mono_counters_register ("Optimized major scan fast", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_optimized_major_scan_fast);