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/background_tracing_manager.h"
  11 #include "content/public/browser/child_process_data.h"
  12 #include "content/public/common/process_type.h"
  13
  14 namespace base {
  15 class ProcessMetrics;
  16 }
  17
  18 namespace performance_monitor {
  19 enum ProcessSubtypes {
  20   kProcessSubtypeUnknown,
  21   kProcessSubtypePPAPIFlash,
  22   kProcessSubtypeExtensionPersistent,
  23   kProcessSubtypeExtensionEvent
  24 };
  25
  26 struct ProcessMetricsMetadata {
  27   base::ProcessHandle handle;
  28   int process_type;
  29   ProcessSubtypes process_subtype;
  30
  31   ProcessMetricsMetadata()
  32       : handle(base::kNullProcessHandle),
  33         process_type(content::PROCESS_TYPE_UNKNOWN),
  34         process_subtype(kProcessSubtypeUnknown) {}
  35 };
  36
  37 class ProcessMetricsHistory {
  38  public:
  39   ProcessMetricsHistory();
  40   ~ProcessMetricsHistory();
  41
  42   // Configure this to monitor a specific process.
  43   void Initialize(const ProcessMetricsMetadata& process_data,
  44                   int initial_update_sequence);
  45
  46   // Gather metrics for the process and accumulate with past data.
  47   void SampleMetrics();
  48
  49   // Triggers any UMA histograms or background traces if cpu_usage is excessive.
  50   void RunPerformanceTriggers();
  51
  52   // Used to mark when this object was last updated, so we can cull
  53   // dead ones.
  54   void set_last_update_sequence(int new_update_sequence) {
  55     last_update_sequence_ = new_update_sequence;
  56   }
  57
  58   int last_update_sequence() const { return last_update_sequence_; }
  59
  60  private:
  61   // May not be fully populated. e.g. no |id| and no |name| for browser and
  62   // renderer processes.
  63   ProcessMetricsMetadata process_data_;
  64   linked_ptr<base::ProcessMetrics> process_metrics_;
  65   int last_update_sequence_;
  66
  67   double cpu_usage_;
  68
  69   content::BackgroundTracingManager::TriggerHandle trace_trigger_handle_;
  70
  71   DISALLOW_ASSIGN(ProcessMetricsHistory);
  72 };
  73
  74 }  // namespace performance_monitor
  75
  76 #endif  // CHROME_BROWSER_PERFORMANCE_MONITOR_PROCESS_METRICS_HISTORY_H_