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// 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.
#ifndef V8_HEAP_HEAP_CONTROLLER_H_
#define V8_HEAP_HEAP_CONTROLLER_H_
#include <cstddef>
#include "src/allocation.h"
#include "src/heap/heap.h"
#include "testing/gtest/include/gtest/gtest_prod.h" // nogncheck
namespace v8 {
namespace internal {
class HeapController {
public:
explicit HeapController(Heap* heap) : heap_(heap) {}
// Computes the allocation limit to trigger the next full garbage collection.
V8_EXPORT_PRIVATE size_t CalculateOldGenerationAllocationLimit(
size_t old_gen_size, size_t max_old_generation_size, double gc_speed,
double mutator_speed, size_t new_space_capacity,
Heap::HeapGrowingMode growing_mode);
size_t MinimumAllocationLimitGrowingStep(Heap::HeapGrowingMode growing_mode);
// The old space size has to be a multiple of Page::kPageSize.
// Sizes are in MB.
static const size_t kMinOldGenerationSize = 128 * Heap::kPointerMultiplier;
static const size_t kMaxOldGenerationSize = 1024 * Heap::kPointerMultiplier;
private:
FRIEND_TEST(HeapController, HeapGrowingFactor);
FRIEND_TEST(HeapController, MaxHeapGrowingFactor);
FRIEND_TEST(HeapControllerTest, OldGenerationAllocationLimit);
V8_EXPORT_PRIVATE static const double kMinHeapGrowingFactor;
V8_EXPORT_PRIVATE static const double kMaxHeapGrowingFactor;
V8_EXPORT_PRIVATE static const double kConservativeHeapGrowingFactor;
V8_EXPORT_PRIVATE static double MaxHeapGrowingFactor(
size_t max_old_generation_size);
V8_EXPORT_PRIVATE static double HeapGrowingFactor(double gc_speed,
double mutator_speed,
double max_factor);
static const double kTargetMutatorUtilization;
Heap* heap_;
};
} // namespace internal
} // namespace v8
#endif // V8_HEAP_HEAP_CONTROLLER_H_
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