--- a/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Wed Jul 05 22:07:34 2017 +0200
+++ b/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Fri Aug 19 17:19:47 2016 +0200
@@ -28,7 +28,6 @@
 #include "classfile/symbolTable.hpp"
 #include "code/codeCache.hpp"
 #include "code/icBuffer.hpp"
-#include "gc/g1/g1Analytics.hpp"
 #include "gc/g1/bufferingOopClosure.hpp"
 #include "gc/g1/concurrentG1Refine.hpp"
 #include "gc/g1/concurrentG1RefineThread.hpp"
@@ -2474,19 +2473,8 @@
 }
 
 jlong G1CollectedHeap::millis_since_last_gc() {
-  jlong now = os::elapsed_counter() / NANOSECS_PER_MILLISEC;
-  const G1Analytics* analytics = _g1_policy->analytics();
-  double last = analytics->last_known_gc_end_time_sec();
-  jlong ret_val = now - (last * 1000);
-  if (ret_val < 0) {
-    // See the notes in GenCollectedHeap::millis_since_last_gc()
-    // for more information about the implementation.
-    log_warning(gc)("Detected clock going backwards. "
-      "Milliseconds since last GC would be " JLONG_FORMAT
-      ". returning zero instead.", ret_val);
-    return 0;
-  }
-  return ret_val;
+  // assert(false, "NYI");
+  return 0;
 }
 
 void G1CollectedHeap::prepare_for_verify() {