Limit rate of full garbage collections triggered by idle notification.

src/heap/gc-idle-time-handler.h

Index: src/heap/gc-idle-time-handler.h
diff --git a/src/heap/gc-idle-time-handler.h b/src/heap/gc-idle-time-handler.h
index 6a39b78aaa2fcc24fd5210236f177bf0f9fffc14..3d82686748ad782f116495f388b413d35ccfbfd7 100644
--- a/src/heap/gc-idle-time-handler.h
+++ b/src/heap/gc-idle-time-handler.h
@@ -138,6 +138,8 @@ class GCIdleTimeHandler {
 
   static const size_t kMinTimeForOverApproximatingWeakClosureInMs;
 
+  static const double kMinMillisecondsInBetweenMarkCompact;

[jochen (gone - plz use gerrit), 2015/03/20 12:41:52]

MinTime...InMs would be more consistent with the other constants

[Hannes Payer (out of office), 2015/03/20 14:20:39]

Done.

+
   class HeapState {
    public:
     void Print();
@@ -155,6 +157,8 @@ class GCIdleTimeHandler {
     size_t used_new_space_size;
     size_t new_space_capacity;
     size_t new_space_allocation_throughput_in_bytes_per_ms;
+    double last_mark_compact_time;
+    double current_time;
   };
 
   GCIdleTimeHandler()
@@ -186,7 +190,9 @@ class GCIdleTimeHandler {
 
   static bool ShouldDoMarkCompact(size_t idle_time_in_ms,
                                   size_t size_of_objects,
-                                  size_t mark_compact_speed_in_bytes_per_ms);
+                                  size_t mark_compact_speed_in_bytes_per_ms,
+                                  double last_mark_comact_time,

[jochen (gone - plz use gerrit), 2015/03/20 12:41:52]

idle_time_in_ms is a size_t value. Can last_mark_com*p*act_time be a size_t as
well? And what's the time unit?

[Hannes Payer (out of office), 2015/03/20 14:20:39]

Done.

+                                  double current_time);
 
   static bool ShouldDoContextDisposalMarkCompact(int context_disposed,
                                                  double contexts_disposal_rate);