36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
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// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_HEAP_GC_IDLE_TIME_HANDLER_H_
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#define V8_HEAP_GC_IDLE_TIME_HANDLER_H_
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#include "src/globals.h"
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namespace v8 {
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namespace internal {
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// The idle time handler makes decisions about which garbage collection
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// operations are executing during IdleNotification.
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class GCIdleTimeHandler {
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public:
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static intptr_t EstimateMarkingStepSize(
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int idle_time_in_ms, intptr_t marking_speed_in_bytes_per_ms);
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// If we haven't recorded any incremental marking events yet, we carefully
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// mark with a conservative lower bound for the marking speed.
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static const intptr_t kInitialConservativeMarkingSpeed = 100 * KB;
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// We have to make sure that we finish the IdleNotification before
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// idle_time_in_ms. Hence, we conservatively prune our workload estimate.
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static const double kConservativeTimeRatio;
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private:
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DISALLOW_COPY_AND_ASSIGN(GCIdleTimeHandler);
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};
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} // namespace internal
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} // namespace v8
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#endif // V8_HEAP_GC_IDLE_TIME_HANDLER_H_
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