Limit rate of full garbage collections triggered by idle notification.

src/heap/mark-compact.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
@@ skipping 35 matching lines @@
       compacting_(false),
       was_marked_incrementally_(false),
       sweeping_in_progress_(false),
       pending_sweeper_jobs_semaphore_(0),
       evacuation_(false),
       migration_slots_buffer_(NULL),
       heap_(heap),
       marking_deque_memory_(NULL),
       marking_deque_memory_committed_(false),
       code_flusher_(NULL),
-      have_code_to_deoptimize_(false) {
+      have_code_to_deoptimize_(false),
+      last_mark_compact_time_(0) {
 }
 
 #ifdef VERIFY_HEAP
 class VerifyMarkingVisitor : public ObjectVisitor {
  public:
   explicit VerifyMarkingVisitor(Heap* heap) : heap_(heap) {}
 
   void VisitPointers(Object** start, Object** end) {
     for (Object** current = start; current < end; current++) {
       if ((*current)->IsHeapObject()) {
@@ skipping 804 matching lines @@
   // objects (empty string, illegal builtin).
   isolate()->stub_cache()->Clear();
 
   if (have_code_to_deoptimize_) {
     // Some code objects were marked for deoptimization during the GC.
     Deoptimizer::DeoptimizeMarkedCode(isolate());
     have_code_to_deoptimize_ = false;
   }
 
   heap_->incremental_marking()->ClearIdleMarkingDelayCounter();
+  last_mark_compact_time_ = static_cast<size_t>(
+      V8::GetCurrentPlatform()->MonotonicallyIncreasingTime() *
+      static_cast<double>(base::Time::kMillisecondsPerSecond));
 }
 
 
 // -------------------------------------------------------------------------
 // Phase 1: tracing and marking live objects.
 //   before: all objects are in normal state.
 //   after: a live object's map pointer is marked as '00'.
 
 // Marking all live objects in the heap as part of mark-sweep or mark-compact
 // collection.  Before marking, all objects are in their normal state.  After
@@ skipping 3705 matching lines @@
   SlotsBuffer* buffer = *buffer_address;
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 }
 }  // namespace v8::internal