--- old/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp	2015-02-17 09:48:39.699464639 +0100
+++ new/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp	2015-02-17 09:48:39.637462838 +0100
@@ -86,6 +86,8 @@
 G1CollectorPolicy::G1CollectorPolicy() :
   _parallel_gc_threads(ParallelGCThreads),
 
+  _phase_times(NULL),
+
   _recent_gc_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
   _stop_world_start(0.0),
 
@@ -208,8 +210,6 @@
   _recent_prev_end_times_for_all_gcs_sec->add(os::elapsedTime());
   _prev_collection_pause_end_ms = os::elapsedTime() * 1000.0;
 
-  _phase_times = new G1GCPhaseTimes(_parallel_gc_threads);
-
   int index = MIN2(_parallel_gc_threads - 1, 7);
 
   _rs_length_diff_seq->add(rs_length_diff_defaults[index]);
@@ -435,6 +435,7 @@
 }
 
 void G1CollectorPolicy::init() {
+  _phase_times = new G1GCPhaseTimes(_parallel_gc_threads, G1Log::finest() ? G1CollectedHeap::num_ext_root_tasks() : 0);
   // Set aside an initial future to_space.
   _g1 = G1CollectedHeap::heap();