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// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef VM_METRICS_H_
#define VM_METRICS_H_
#include "vm/allocation.h"
namespace dart {
class Isolate;
class JSONStream;
// Metrics for each isolate.
#define ISOLATE_METRIC_LIST(V) \
V(MetricHeapOldUsed, HeapOldUsed, "heap.old.used", kByte) \
V(MaxMetric, HeapOldUsedMax, "heap.old.used.max", kByte) \
V(MetricHeapOldCapacity, HeapOldCapacity, "heap.old.capacity", kByte) \
V(MaxMetric, HeapOldCapacityMax, "heap.old.capacity.max", kByte) \
V(MetricHeapOldExternal, HeapOldExternal, "heap.old.external", kByte) \
V(MetricHeapNewUsed, HeapNewUsed, "heap.new.used", kByte) \
V(MaxMetric, HeapNewUsedMax, "heap.new.used.max", kByte) \
V(MetricHeapNewCapacity, HeapNewCapacity, "heap.new.capacity", kByte) \
V(MaxMetric, HeapNewCapacityMax, "heap.new.capacity.max", kByte) \
V(MetricHeapNewExternal, HeapNewExternal, "heap.new.external", kByte) \
V(MetricHeapUsed, HeapGlobalUsed, "heap.global.used", kByte) \
V(MaxMetric, HeapGlobalUsedMax, "heap.global.used.max", kByte) \
#define VM_METRIC_LIST(V) \
V(MetricIsolateCount, IsolateCount, "vm.isolate.count", kCounter)
class Metric {
public:
enum Unit {
kCounter,
kByte,
};
Metric();
static void InitOnce();
static void Cleanup();
// Initialize and register a metric for an isolate.
void Init(Isolate* isolate,
const char* name,
const char* description,
Unit unit);
// Initialize and register a metric for the VM.
void Init(const char* name,
const char* description,
Unit unit);
virtual ~Metric();
void PrintJSON(JSONStream* stream);
// Returns a zone allocated string.
static char* ValueToString(int64_t value, Unit unit);
// Returns a zone allocated string.
char* ToString();
int64_t value() const { return value_; }
void set_value(int64_t value) { value_ = value; }
void increment() { value_++; }
Metric* next() const { return next_; }
void set_next(Metric* next) {
next_ = next;
}
const char* name() const { return name_; }
const char* description() const { return description_; }
Unit unit() const { return unit_; }
// Will be NULL for Metric that is VM-global.
Isolate* isolate() const { return isolate_; }
static Metric* vm_head() { return vm_list_head_; }
protected:
// Override to get a callback when value is serialized to JSON.
// Use this for metrics that produce their value on demand.
virtual int64_t Value() const { return value(); }
private:
Isolate* isolate_;
const char* name_;
const char* description_;
Unit unit_;
int64_t value_;
Metric* next_;
static bool NameExists(Metric* head, const char* name);
void RegisterWithIsolate();
void DeregisterWithIsolate();
void RegisterWithVM();
void DeregisterWithVM();
static Metric* vm_list_head_;
DISALLOW_COPY_AND_ASSIGN(Metric);
};
// A Metric class that reports the maximum value observed.
// Initial maximum is kMinInt64.
class MaxMetric : public Metric {
public:
MaxMetric();
void SetValue(int64_t new_value);
};
// A Metric class that reports the minimum value observed.
// Initial minimum is kMaxInt64.
class MinMetric : public Metric {
public:
MinMetric();
void SetValue(int64_t new_value);
};
class MetricHeapOldUsed : public Metric {
protected:
virtual int64_t Value() const;
};
class MetricHeapOldCapacity : public Metric {
protected:
virtual int64_t Value() const;
};
class MetricHeapOldExternal : public Metric {
protected:
virtual int64_t Value() const;
};
class MetricHeapNewUsed : public Metric {
protected:
virtual int64_t Value() const;
};
class MetricHeapNewCapacity : public Metric {
protected:
virtual int64_t Value() const;
};
class MetricHeapNewExternal : public Metric {
protected:
virtual int64_t Value() const;
};
class MetricIsolateCount : public Metric {
protected:
virtual int64_t Value() const;
};
class MetricHeapUsed : public Metric {
protected:
virtual int64_t Value() const;
};
} // namespace dart
#endif // VM_METRICS_H_