Perform scavenge in idle tasks.

src/heap/heap.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/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/bits.h"
 #include "src/base/once.h"
 #include "src/base/utils/random-number-generator.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
 #include "src/compilation-cache.h"
 #include "src/conversions.h"
 #include "src/cpu-profiler.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/global-handles.h"
 #include "src/heap/array-buffer-tracker.h"
 #include "src/heap/gc-idle-time-handler.h"
 #include "src/heap/gc-tracer.h"
 #include "src/heap/incremental-marking.h"
 #include "src/heap/mark-compact-inl.h"
 #include "src/heap/mark-compact.h"
 #include "src/heap/memory-reducer.h"
 #include "src/heap/object-stats.h"
 #include "src/heap/objects-visiting-inl.h"
 #include "src/heap/objects-visiting.h"
+#include "src/heap/scavenge-job.h"
 #include "src/heap/scavenger-inl.h"
 #include "src/heap/store-buffer.h"
 #include "src/heap-profiler.h"
 #include "src/interpreter/interpreter.h"
 #include "src/runtime-profiler.h"
 #include "src/scopeinfo.h"
 #include "src/snapshot/natives.h"
 #include "src/snapshot/serialize.h"
 #include "src/snapshot/snapshot.h"
 #include "src/type-feedback-vector.h"
@@ skipping 81 matching lines @@
       sweeping_time_(0.0),
       last_idle_notification_time_(0.0),
       last_gc_time_(0.0),
       scavenge_collector_(nullptr),
       mark_compact_collector_(this),
       store_buffer_(this),
       incremental_marking_(this),
       gc_idle_time_handler_(nullptr),
       memory_reducer_(nullptr),
       object_stats_(nullptr),
+      scavenge_job_(nullptr),
       full_codegen_bytes_generated_(0),
       crankshaft_codegen_bytes_generated_(0),
       new_space_allocation_counter_(0),
       old_generation_allocation_counter_(0),
       old_generation_size_at_last_gc_(0),
       gcs_since_last_deopt_(0),
       allocation_sites_scratchpad_length_(0),
       ring_buffer_full_(false),
       ring_buffer_end_(0),
       promotion_queue_(this),
@@ skipping 632 matching lines @@
                       current_gc_callback_flags_);
     return;
   }
   DCHECK(FLAG_overapproximate_weak_closure);
   if (!incremental_marking()->weak_closure_was_overapproximated()) {
     OverApproximateWeakClosure("GC interrupt");
   }
 }
 
 
+void Heap::ScheduleIdleScavengeIfNeeded(int bytes_allocated) {
+  scavenge_job_->ScheduleIdleTaskIfNeeded(this, bytes_allocated);
+}
+
+
 void Heap::OverApproximateWeakClosure(const char* gc_reason) {
   if (FLAG_trace_incremental_marking) {
     PrintF("[IncrementalMarking] Overapproximate weak closure (%s).\n",
            gc_reason);
   }
 
   GCTracer::Scope gc_scope(tracer(),
                            GCTracer::Scope::MC_INCREMENTAL_WEAKCLOSURE);
 
   {
@@ skipping 3298 matching lines @@
 
 
 GCIdleTimeHeapState Heap::ComputeHeapState() {
   GCIdleTimeHeapState heap_state;
   heap_state.contexts_disposed = contexts_disposed_;
   heap_state.contexts_disposal_rate =
       tracer()->ContextDisposalRateInMilliseconds();
   heap_state.incremental_marking_stopped = incremental_marking()->IsStopped();
   heap_state.mark_compact_speed_in_bytes_per_ms =
       static_cast<size_t>(tracer()->MarkCompactSpeedInBytesPerMillisecond());
-  heap_state.scavenge_speed_in_bytes_per_ms =
-      static_cast<size_t>(tracer()->ScavengeSpeedInBytesPerMillisecond());
-  heap_state.used_new_space_size = new_space_.Size();
-  heap_state.new_space_capacity = new_space_.Capacity();
-  heap_state.new_space_allocation_throughput_in_bytes_per_ms =
-      tracer()->NewSpaceAllocationThroughputInBytesPerMillisecond();
   return heap_state;
 }
 
 
 double Heap::AdvanceIncrementalMarking(
     intptr_t step_size_in_bytes, double deadline_in_ms,
     IncrementalMarking::StepActions step_actions) {
   DCHECK(!incremental_marking()->IsStopped());
 
   if (step_size_in_bytes == 0) {
@@ skipping 36 matching lines @@
                  IncrementalMarkingJob::IdleTask::kDone;
       }
       break;
     }
     case DO_FULL_GC: {
       DCHECK(contexts_disposed_ > 0);
       HistogramTimerScope scope(isolate_->counters()->gc_context());
       CollectAllGarbage(kNoGCFlags, "idle notification: contexts disposed");
       break;
     }
-    case DO_SCAVENGE:
-      CollectGarbage(NEW_SPACE, "idle notification: scavenge");
-      break;
     case DO_NOTHING:
       break;
   }
 
   return result;
 }
 
 
 void Heap::IdleNotificationEpilogue(GCIdleTimeAction action,
                                     GCIdleTimeHeapState heap_state,
@@ skipping 806 matching lines @@
 
   // Update inline allocation limit for old spaces.
   PagedSpaces spaces(this);
   for (PagedSpace* space = spaces.next(); space != NULL;
        space = spaces.next()) {
     space->EmptyAllocationInfo();
   }
 }
 
 
+void Heap::LowerInlineAllocationLimit(intptr_t step) {
+  new_space()->LowerInlineAllocationLimit(step);
+}
+
+
+void Heap::ResetInlineAllocationLimit() {
+  new_space()->LowerInlineAllocationLimit(
+      ScavengeJob::kBytesAllocatedBeforeNextIdleTask);
+}
+
+
 V8_DECLARE_ONCE(initialize_gc_once);
 
 static void InitializeGCOnce() {
   Scavenger::Initialize();
   StaticScavengeVisitor::Initialize();
   MarkCompactCollector::Initialize();
 }
 
 
 bool Heap::SetUp() {
@@ skipping 72 matching lines @@
 
   scavenge_collector_ = new Scavenger(this);
 
   gc_idle_time_handler_ = new GCIdleTimeHandler();
 
   memory_reducer_ = new MemoryReducer(this);
 
   object_stats_ = new ObjectStats(this);
   object_stats_->ClearObjectStats(true);
 
+  scavenge_job_ = new ScavengeJob();
+
   array_buffer_tracker_ = new ArrayBufferTracker(this);
 
   LOG(isolate_, IntPtrTEvent("heap-capacity", Capacity()));
   LOG(isolate_, IntPtrTEvent("heap-available", Available()));
 
   store_buffer()->SetUp();
 
   mark_compact_collector()->SetUp();
 
+  ResetInlineAllocationLimit();
+
   return true;
 }
 
 
 bool Heap::CreateHeapObjects() {
   // Create initial maps.
   if (!CreateInitialMaps()) return false;
   CreateApiObjects();
 
   // Create initial objects
@@ skipping 92 matching lines @@
 
   if (memory_reducer_ != nullptr) {
     memory_reducer_->TearDown();
     delete memory_reducer_;
     memory_reducer_ = nullptr;
   }
 
   delete object_stats_;
   object_stats_ = nullptr;
 
+  delete scavenge_job_;
+  scavenge_job_ = nullptr;
+
   WaitUntilUnmappingOfFreeChunksCompleted();
 
   delete array_buffer_tracker_;
   array_buffer_tracker_ = nullptr;
 
   isolate_->global_handles()->TearDown();
 
   external_string_table_.TearDown();
 
   mark_compact_collector()->TearDown();
@@ skipping 893 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8