Add ProcessPowerCollector to audit power information.

chrome/browser/power/process_power_collector.cc

Index: chrome/browser/power/process_power_collector.cc
diff --git a/chrome/browser/power/process_power_collector.cc b/chrome/browser/power/process_power_collector.cc
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+++ b/chrome/browser/power/process_power_collector.cc
@@ -0,0 +1,174 @@
+// Copyright 2014 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.
+#include "chrome/browser/power/process_power_collector.h"
+
+#include "apps/app_window.h"
+#include "apps/app_window_registry.h"
+#include "base/process/process_handle.h"
+#include "base/process/process_metrics.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_iterator.h"
+#include "components/power/origin_power_map.h"
+#include "components/power/origin_power_map_factory.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/web_contents.h"
+#include "url/gurl.h"
+
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/power/power_data_collector.h"
+#endif
+
+namespace {
+const int kSecondsPerSample = 30;
+}
+
+ProcessPowerCollector::PerProcessData::PerProcessData(
+    scoped_ptr<base::ProcessMetrics> metrics,
+    const GURL& origin,
+    Profile* profile)
+    : profile_(profile),
+      last_origin_(origin),
+      last_cpu_percent_(0),
+      seen_this_cycle_(true) {
+  metrics_ = metrics.Pass();

[Daniel Erat, 2014/08/20 17:47:58]

nit: can you just do:

  metrics_(metrics.Pass())

in the initialization list?

[Daniel Nishi, 2014/08/20 18:13:35]

For some reason I was under the impression you couldn't, but you can.

Done.

+}
+
+ProcessPowerCollector::PerProcessData::PerProcessData() {
+}
+
+ProcessPowerCollector::PerProcessData::~PerProcessData() {
+}
+
+ProcessPowerCollector::ProcessPowerCollector() {
+}
+
+ProcessPowerCollector::~ProcessPowerCollector() {
+}
+
+void ProcessPowerCollector::StartUpdating() {
+  DCHECK(!timer_.IsRunning());
+  timer_.Start(FROM_HERE,
+               base::TimeDelta::FromSeconds(kSecondsPerSample),
+               this,
+               &ProcessPowerCollector::UpdatePowerConsumptionCallback);
+}
+
+void ProcessPowerCollector::UpdatePowerConsumptionCallback() {
+  RecordCpuUsageByOrigin(SynchronizeProcesses());

[Daniel Erat, 2014/08/20 17:47:58]

nit: break this into two lines to make it clearer what's being passed:

const double total_cpu_percent = SynchronizeProcesses();
RecordCpuUsageByOrigin(total_cpu_percent);

[Daniel Nishi, 2014/08/20 18:13:34]

Done.

+}
+
+double ProcessPowerCollector::SynchronizeProcesses() {
+  // Update all tabs.
+  for (TabContentsIterator it; !it.done(); it.Next()) {
+    content::RenderProcessHost* render_process = it->GetRenderProcessHost();
+    // Skip incognito web contents.
+    if (render_process->GetBrowserContext()->IsOffTheRecord())
+      continue;
+    AddProcessToMap(render_process, it->GetLastCommittedURL().GetOrigin());
+  }
+
+  // Iterate over all profiles to find all app windows to attribute all apps.
+  ProfileManager* pm = g_browser_process->profile_manager();
+  std::vector<Profile*> open_profiles = pm->GetLoadedProfiles();
+  for (std::vector<Profile*>::const_iterator it = open_profiles.begin();
+       it != open_profiles.end();
+       ++it) {
+    const apps::AppWindowRegistry::AppWindowList& app_windows =
+        apps::AppWindowRegistry::Get(*it)->app_windows();
+    for (apps::AppWindowRegistry::AppWindowList::const_iterator itr =
+             app_windows.begin();
+         itr != app_windows.end();
+         ++itr) {
+      content::WebContents* web_contents = (*itr)->web_contents();
+
+      AddProcessToMap(web_contents->GetRenderProcessHost(),
+                      web_contents->GetLastCommittedURL().GetOrigin());
+    }
+  }
+
+  // Remoev invalid processes and sum up the cpu cycle.

[Daniel Erat, 2014/08/20 17:47:58]

nit: Remove

[Daniel Nishi, 2014/08/20 18:13:35]

Done.

+  double cpu_cycle = 0.0;

[Daniel Erat, 2014/08/20 17:47:59]

nit: rename to |total_cpu_percent|?

[Daniel Nishi, 2014/08/20 18:13:34]

Done.

+  ProcessMetricsMap::iterator it = metrics_map_.begin();
+  while (it != metrics_map_.end()) {
+    if (!it->second->seen_this_cycle()) {
+      metrics_map_.erase(it++);
+      continue;
+    }
+
+    it->second->set_last_cpu_percent(it->second->metrics()->GetCPUUsage());

[Daniel Erat, 2014/08/20 17:47:59]

could you also do this in AddProcessToMap()? maybe it could be renamed to
something like AddOrUpdateProcess() or UpdateProcessInMap()?

[Daniel Nishi, 2014/08/20 18:13:34]

Added and changed to UpdateProcessInMap()

+    it->second->set_seen_this_cycle(true);

[Daniel Erat, 2014/08/20 17:47:58]

do you actually need this call? AddProcessToMap() already does this, right?

[Daniel Nishi, 2014/08/20 18:13:35]

Correct.
Removed.

+
+    // Skip errors.
+    if (it->second->last_cpu_percent() < 0) {
+      it->second->set_last_cpu_percent(0);
+      continue;
+    }
+
+    cpu_cycle += it->second->last_cpu_percent();
+    it++;
+  }
+
+  return cpu_cycle;
+}
+
+void ProcessPowerCollector::RecordCpuUsageByOrigin(double cpu_cycle) {

[Daniel Erat, 2014/08/20 17:47:58]

nit: rename |cpu_cycle| to |total_cpu_percent|?

(ditto for header)

[Daniel Nishi, 2014/08/20 18:13:35]

Done.

+#if defined(OS_CHROMEOS)
+  // Don't record data yet if no power data exists yet.
+  chromeos::PowerDataCollector* power_data_collector =
+      chromeos::PowerDataCollector::Get();
+  if (power_data_collector->power_supply_data().empty())
+    return;
+
+  chromeos::PowerDataCollector::PowerSupplySample sample =
+      power_data_collector->power_supply_data().back();
+
+  // Don't record data if plugged in.
+  if (sample.external_power)
+    return;
+#endif
+
+  for (ProcessMetricsMap::iterator it = metrics_map_.begin();
+       it != metrics_map_.end();
+       ++it) {
+    double last_process_power_usage = it->second->last_cpu_percent();
+#if defined(OS_CHROMEOS)
+    // Only query discharge rate if there is a battery.
+    if (sample.battery_percent > -1 && cpu_cycle > 0)

[Daniel Erat, 2014/08/20 17:47:59]

nit: use curly brackets here since the statement portion doesn't fit on a single
line

[Daniel Nishi, 2014/08/20 18:13:35]

Done.

+      last_process_power_usage =
+          last_process_power_usage * sample.battery_discharge_rate / cpu_cycle;
+#endif
+
+    GURL origin = it->second->last_origin();
+    power::OriginPowerMap* origin_power_map =
+        power::OriginPowerMapFactory::GetForBrowserContext(
+            it->second->profile());
+    DCHECK(origin_power_map);
+    origin_power_map->AddPowerForOrigin(origin, last_process_power_usage);
+
+    // Invalidate |last_cpu| for the next cycle.
+    it->second->set_seen_this_cycle(false);
+  }
+}
+
+void ProcessPowerCollector::AddProcessToMap(
+    const content::RenderProcessHost* rph,
+    const GURL& origin) {
+  base::ProcessHandle handle = rph->GetHandle();
+  if (metrics_map_.find(handle) == metrics_map_.end()) {
+    metrics_map_[handle] = linked_ptr<PerProcessData>(new PerProcessData(
+#if defined(OS_MACOSX)
+        scoped_ptr<base::ProcessMetrics>(
+            base::ProcessMetrics::CreateProcessMetrics(handle, NULL)),
+#else
+        scoped_ptr<base::ProcessMetrics>(
+            base::ProcessMetrics::CreateProcessMetrics(handle)),
+#endif
+        origin,
+        Profile::FromBrowserContext(rph->GetBrowserContext())));
+  }
+  metrics_map_[handle]->set_seen_this_cycle(true);
+}