--- old/src/share/vm/gc/serial/genMarkSweep.cpp	2016-03-15 23:09:53.324417857 +0100
+++ new/src/share/vm/gc/serial/genMarkSweep.cpp	2016-03-15 23:09:53.184413092 +0100
@@ -218,20 +218,30 @@
   // This is the point where the entire marking should have completed.
   assert(_marking_stack.is_empty(), "Marking should have completed");
 
-  // Unload classes and purge the SystemDictionary.
-  bool purged_class = SystemDictionary::do_unloading(&is_alive);
+  {
+    GCTraceTime(Debug, gc) tm_m("Class Unloading", gc_timer());
 
-  // Unload nmethods.
-  CodeCache::do_unloading(&is_alive, purged_class);
+    // Unload classes and purge the SystemDictionary.
+    bool purged_class = SystemDictionary::do_unloading(&is_alive);
 
-  // Prune dead klasses from subklass/sibling/implementor lists.
-  Klass::clean_weak_klass_links(&is_alive);
+    // Unload nmethods.
+    CodeCache::do_unloading(&is_alive, purged_class);
 
-  // Delete entries for dead interned strings.
-  StringTable::unlink(&is_alive);
-
-  // Clean up unreferenced symbols in symbol table.
-  SymbolTable::unlink();
+    // Prune dead klasses from subklass/sibling/implementor lists.
+    Klass::clean_weak_klass_links(&is_alive);
+  }
+
+  {
+    GCTraceTime(Debug, gc) t("Scrub String Table", gc_timer());
+    // Delete entries for dead interned strings.
+    StringTable::unlink(&is_alive);
+  }
+
+  {
+    GCTraceTime(Debug, gc) t("Scrub Symbol Table", gc_timer());
+    // Clean up unreferenced symbols in symbol table.
+    SymbolTable::unlink();
+  }
 
   gc_tracer()->report_object_count_after_gc(&is_alive);
 }