chrome/browser/performance_monitor/process_metrics_history.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_PERFORMANCE_MONITOR_PROCESS_METRICS_HISTORY_H_
   6 #define CHROME_BROWSER_PERFORMANCE_MONITOR_PROCESS_METRICS_HISTORY_H_
   7
   8 #include "base/memory/linked_ptr.h"
   9 #include "base/process/process_handle.h"
  10 #include "content/public/browser/child_process_data.h"
  11 #include "content/public/common/process_type.h"
  12
  13 namespace base {
  14 class ProcessMetrics;
  15 }
  16
  17 namespace performance_monitor {
  18 enum ProcessSubtypes {
  19   kProcessSubtypeUnknown,
  20   kProcessSubtypePPAPIFlash,
  21   kProcessSubtypeExtensionPersistent,
  22   kProcessSubtypeExtensionEvent
  23 };
  24
  25 struct ProcessMetricsMetadata {
  26   base::ProcessHandle handle;
  27   int process_type;
  28   ProcessSubtypes process_subtype;
  29
  30   ProcessMetricsMetadata()
  31       : handle(base::kNullProcessHandle),
  32         process_type(content::PROCESS_TYPE_UNKNOWN),
  33         process_subtype(kProcessSubtypeUnknown) {}
  34 };
  35
  36 class ProcessMetricsHistory {
  37  public:
  38   ProcessMetricsHistory();
  39   ~ProcessMetricsHistory();
  40
  41   // Configure this to monitor a specific process.
  42   void Initialize(const ProcessMetricsMetadata& process_data,
  43                   int initial_update_sequence);
  44
  45   // Gather metrics for the process and accumulate with past data.
  46   void SampleMetrics();
  47
  48   // Used to mark when this object was last updated, so we can cull
  49   // dead ones.
  50   void set_last_update_sequence(int new_update_sequence) {
  51     last_update_sequence_ = new_update_sequence;
  52   }
  53
  54   int last_update_sequence() const { return last_update_sequence_; }
  55
  56  private:
  57   void RunPerformanceTriggers();
  58
  59   // May not be fully populated. e.g. no |id| and no |name| for browser and
  60   // renderer processes.
  61   ProcessMetricsMetadata process_data_;
  62   linked_ptr<base::ProcessMetrics> process_metrics_;
  63   int last_update_sequence_;
  64
  65   double cpu_usage_;
  66
  67   DISALLOW_ASSIGN(ProcessMetricsHistory);
  68 };
  69
  70 }  // namespace performance_monitor
  71
  72 #endif  // CHROME_BROWSER_PERFORMANCE_MONITOR_PROCESS_METRICS_HISTORY_H_