Use an upper bound for marking time estimation in idle notification.

src/heap/gc-idle-time-handler-unittest.cc

 // Copyright 2014 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 <limits>
 
 #include "src/heap/gc-idle-time-handler.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace v8 {
@@ skipping 14 matching lines @@
     result.size_of_objects = kSizeOfObjects;
     result.incremental_marking_stopped = false;
     result.can_start_incremental_marking = true;
     result.sweeping_in_progress = false;
     result.mark_compact_speed_in_bytes_per_ms = kMarkCompactSpeed;
     result.incremental_marking_speed_in_bytes_per_ms = kMarkingSpeed;
     return result;
   }
 
   static const size_t kSizeOfObjects = 100 * MB;
-  static const size_t kMarkCompactSpeed = 100 * KB;
-  static const size_t kMarkingSpeed = 100 * KB;
+  static const size_t kMarkCompactSpeed = 200 * KB;
+  static const size_t kMarkingSpeed = 200 * KB;
 
  private:
   GCIdleTimeHandler handler_;
 };
 
 }  // namespace
 
 
 TEST(GCIdleTimeHandler, EstimateMarkingStepSizeInitial) {
   size_t step_size = GCIdleTimeHandler::EstimateMarkingStepSize(1, 0);
@@ skipping 33 matching lines @@
 TEST(GCIdleTimeHandler, EstimateMarkCompactTimeInitial) {
   size_t size = 100 * MB;
   size_t time = GCIdleTimeHandler::EstimateMarkCompactTime(size, 0);
   EXPECT_EQ(size / GCIdleTimeHandler::kInitialConservativeMarkCompactSpeed,
             time);
 }
 
 
 TEST(GCIdleTimeHandler, EstimateMarkCompactTimeNonZero) {
   size_t size = 100 * MB;
-  size_t speed = 10 * KB;
+  size_t speed = 1 * MB;
   size_t time = GCIdleTimeHandler::EstimateMarkCompactTime(size, speed);
   EXPECT_EQ(size / speed, time);
 }
 
 
 TEST(GCIdleTimeHandler, EstimateMarkCompactTimeMax) {
   size_t size = std::numeric_limits<size_t>::max();
   size_t speed = 1;
   size_t time = GCIdleTimeHandler::EstimateMarkCompactTime(size, speed);
   EXPECT_EQ(GCIdleTimeHandler::kMaxMarkCompactTimeInMs, time);
@@ skipping 134 matching lines @@
   // Emulate mutator work.
   for (int i = 0; i < GCIdleTimeHandler::kIdleScavengeThreshold; i++) {
     handler()->NotifyScavenge();
   }
   action = handler()->Compute(idle_time_ms, heap_state);
   EXPECT_EQ(DO_INCREMENTAL_MARKING, action.type);
 }
 
 }  // namespace internal
 }  // namespace v8