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// Copyright 2015 The Chromium 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 CHROME_BROWSER_METRICS_METRICS_MEMORY_DETAILS_H_
#define CHROME_BROWSER_METRICS_METRICS_MEMORY_DETAILS_H_
#include <map>
#include "base/callback.h"
#include "base/macros.h"
#include "build/build_config.h"
#include "chrome/browser/memory_details.h"
// MemoryGrowthTracker tracks latest metrics about record time and memory usage
// at that time per process.
class MemoryGrowthTracker {
public:
MemoryGrowthTracker();
~MemoryGrowthTracker();
// If 30 minutes have passed since last UMA record, UpdateSample() computes
// a difference between current memory usage |sample| of process |pid| and
// stored memory usage at the time of last UMA record. Then, it updates the
// stored memory usage to |sample|, stores the difference in |diff| and
// returns true.
// If no memory usage of |pid| has not been recorded so far or 30 minutes
// have not passed since last record, it just returns false.
// |sample| is memory usage in kB.
bool UpdateSample(base::ProcessId pid, int sample, int* diff);
private:
// Latest metrics about record time and memory usage at that time per process.
// The second values of |memory_sizes_| are in kB.
std::map<base::ProcessId, base::TimeTicks> times_;
std::map<base::ProcessId, int> memory_sizes_;
DISALLOW_COPY_AND_ASSIGN(MemoryGrowthTracker);
};
// Handles asynchronous fetching of memory details and logging histograms about
// memory use of various processes.
// Will run the provided callback when finished.
class MetricsMemoryDetails : public MemoryDetails {
public:
MetricsMemoryDetails(const base::Closure& callback,
MemoryGrowthTracker* memory_growth_tracker);
protected:
~MetricsMemoryDetails() override;
// MemoryDetails:
void OnDetailsAvailable() override;
private:
// Updates the global histograms for tracking memory usage.
void UpdateHistograms();
#if defined(OS_CHROMEOS)
void UpdateSwapHistograms();
#endif
base::Closure callback_;
// A pointer to MemoryGrowthTracker which is contained in a longer-lived
// owner of MetricsMemoryDetails, for example, ChromeMetricsServiceClient.
// If it is null, nothing is tracked.
MemoryGrowthTracker* memory_growth_tracker_;
DISALLOW_COPY_AND_ASSIGN(MetricsMemoryDetails);
};
#endif // CHROME_BROWSER_METRICS_METRICS_MEMORY_DETAILS_H_
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