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// Copyright 2021 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_CPPGC_METRIC_RECORDER_H_
#define V8_HEAP_CPPGC_METRIC_RECORDER_H_
#include <cstdint>
namespace cppgc {
namespace internal {
class StatsCollector;
/**
* Base class used for reporting GC statistics histograms. Embedders interested
* in collecting histograms should implement the virtual AddMainThreadEvent
* methods below and pass an instance of the implementation during Heap
* creation.
*/
class MetricRecorder {
public:
struct GCCycle {
enum class Type { kMinor, kMajor };
struct IncrementalPhases {
int64_t mark_duration_us = -1;
int64_t sweep_duration_us = -1;
};
struct Phases : public IncrementalPhases {
int64_t weak_duration_us = -1;
int64_t compact_duration_us = -1;
};
struct Sizes {
int64_t before_bytes = -1;
int64_t after_bytes = -1;
int64_t freed_bytes = -1;
};
Type type = Type::kMajor;
Phases total;
Phases main_thread;
Phases main_thread_atomic;
IncrementalPhases main_thread_incremental;
Sizes objects;
Sizes memory;
double collection_rate_in_percent;
double efficiency_in_bytes_per_us;
double main_thread_efficiency_in_bytes_per_us;
};
struct MainThreadIncrementalMark {
int64_t duration_us = -1;
};
struct MainThreadIncrementalSweep {
int64_t duration_us = -1;
};
virtual ~MetricRecorder() = default;
virtual void AddMainThreadEvent(const GCCycle& event) {}
virtual void AddMainThreadEvent(const MainThreadIncrementalMark& event) {}
virtual void AddMainThreadEvent(const MainThreadIncrementalSweep& event) {}
};
} // namespace internal
} // namespace cppgc
#endif // V8_HEAP_CPPGC_METRIC_RECORDER_H_
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