Add Startup Timing to CPM

chrome/browser/performance_monitor/startup_timer.cc

Index: chrome/browser/performance_monitor/startup_timer.cc
diff --git a/chrome/browser/performance_monitor/startup_timer.cc b/chrome/browser/performance_monitor/startup_timer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0af0a57bdc54d92a668c76a2a56619112427679e
--- /dev/null
+++ b/chrome/browser/performance_monitor/startup_timer.cc
@@ -0,0 +1,137 @@
+// Copyright (c) 2012 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/performance_monitor/startup_timer.h"
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/string_number_conversions.h"
+#include "chrome/browser/performance_monitor/database.h"
+#include "chrome/browser/performance_monitor/performance_monitor.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/notification_details.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_source.h"
+#include "content/public/browser/notification_types.h"
+
+namespace performance_monitor {
+
+namespace {
+// Needed because Database::AddMetric is overloaded, so base::Bind doesn't work.
+void AddMetricToDatabaseOnBackgroundThread(Database* database,
+                                           MetricType metric,
+                                           std::string value) {
+  database->AddMetric(metric, value);
+}
+
+}  // namespace
+
+// static
+StartupTimer* StartupTimer::g_startup_timer_ = NULL;
+
+StartupTimer::StartupTimer() : startup_begin_(base::TimeTicks::Now()),
+                               startup_type_(STARTUP_NORMAL),
+                               performance_monitor_initialized_(false) {
+  CHECK(!g_startup_timer_);
+  g_startup_timer_ = this;
+
+  // We need this check because, under certain rare circumstances,
+  // NotificationService::current() will return null, and this will cause a
+  // segfault in NotificationServiceImpl::AddObserver(). Currently, this only
+  // happens as a result of the child process launched by BrowserMainTest.
+  // WarmConnectionFieldTrial_Invalid.
+  if (content::NotificationService::current()) {
+    registrar_.Add(this, chrome::NOTIFICATION_PERFORMANCE_MONITOR_INITIALIZED,
+                   content::NotificationService::AllSources());
+  }
+}
+
+StartupTimer::~StartupTimer() {
+  DCHECK(this == g_startup_timer_);
+  g_startup_timer_ = NULL;
+}
+
+bool StartupTimer::SignalStartupComplete(StartupType startup_type) {
+  DCHECK(elapsed_startup_time_ == base::TimeDelta());
+
+  startup_type_ = startup_type;
+
+  elapsed_startup_time_ =
+      base::TimeTicks::Now() - total_pause_ - startup_begin_;
+
+  if (performance_monitor_initialized_)
+    InsertElapsedStartupTime();
+
+  return true;
+}
+
+// static
+void StartupTimer::PauseTimer() {
+  // Check that the timer is not already paused.
+  DCHECK(g_startup_timer_->pause_started_ == base::TimeTicks());
+
+  g_startup_timer_->pause_started_ = base::TimeTicks::Now();
+}
+
+// static
+void StartupTimer::UnpauseTimer() {
+  // Check that the timer has been paused.
+  DCHECK(g_startup_timer_->pause_started_ != base::TimeTicks());
+
+  g_startup_timer_->total_pause_ += base::TimeTicks::Now() -
+                                    g_startup_timer_->pause_started_;
+
+  g_startup_timer_->pause_started_ = base::TimeTicks();
+}
+
+void StartupTimer::Observe(int type,
+                           const content::NotificationSource& source,
+                           const content::NotificationDetails& details) {
+  CHECK(type == chrome::NOTIFICATION_PERFORMANCE_MONITOR_INITIALIZED);
+  performance_monitor_initialized_ = true;
+  if (elapsed_startup_time_ != base::TimeDelta())
+    InsertElapsedStartupTime();
+  if (elapsed_session_restore_times_.size())
+    InsertElapsedSessionRestoreTime();
+}
+
+// static
+void StartupTimer::SetElapsedSessionRestoreTime(
+    const base::TimeDelta& elapsed_session_restore_time) {
+  g_startup_timer_->elapsed_session_restore_times_.push_back(
+      elapsed_session_restore_time);
+
+  if (g_startup_timer_->performance_monitor_initialized_)
+    g_startup_timer_->InsertElapsedSessionRestoreTime();
+}
+
+void StartupTimer::InsertElapsedStartupTime() {
+  content::BrowserThread::PostBlockingPoolSequencedTask(
+      Database::kDatabaseSequenceToken,
+      FROM_HERE,
+      base::Bind(
+          &AddMetricToDatabaseOnBackgroundThread,
+          base::Unretained(PerformanceMonitor::GetInstance()->database()),
+          startup_type_ == STARTUP_NORMAL ? METRIC_STARTUP_TIME
+                                          : METRIC_TEST_STARTUP_TIME,
+          base::Int64ToString(elapsed_startup_time_.ToInternalValue())));
+}
+
+void StartupTimer::InsertElapsedSessionRestoreTime() {
+  for (std::vector<base::TimeDelta>::const_iterator iter =
+           elapsed_session_restore_times_.begin();
+       iter != elapsed_session_restore_times_.end(); ++iter) {
+    content::BrowserThread::PostBlockingPoolSequencedTask(
+        Database::kDatabaseSequenceToken,
+        FROM_HERE,
+        base::Bind(
+            &AddMetricToDatabaseOnBackgroundThread,
+            base::Unretained(PerformanceMonitor::GetInstance()->database()),
+            METRIC_SESSION_RESTORE_TIME,
+            base::Int64ToString(iter->ToInternalValue())));
+  }
+}
+
+}  // namespace performance_monitor