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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.
#include "chrome/browser/sessions/session_restore_stats_collector.h"
#include <string>
#include "base/metrics/histogram.h"
#include "base/strings/stringprintf.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/web_contents.h"
using content::NavigationController;
using content::RenderWidgetHost;
using content::WebContents;
// static
void SessionRestoreStatsCollector::TrackTabs(
const std::vector<SessionRestoreDelegate::RestoredTab>& tabs,
const base::TimeTicks& restore_started) {
if (!shared_collector_)
shared_collector_ = new SessionRestoreStatsCollector(restore_started);
shared_collector_->AddTabs(tabs);
}
// static
void SessionRestoreStatsCollector::TrackActiveTabs(
const std::vector<SessionRestoreDelegate::RestoredTab>& tabs,
const base::TimeTicks& restore_started) {
if (!shared_collector_)
shared_collector_ = new SessionRestoreStatsCollector(restore_started);
std::vector<SessionRestoreDelegate::RestoredTab> active_tabs;
for (auto tab : tabs) {
if (tab.is_active())
active_tabs.push_back(tab);
}
shared_collector_->AddTabs(active_tabs);
}
SessionRestoreStatsCollector::SessionRestoreStatsCollector(
const base::TimeTicks& restore_started)
: got_first_foreground_load_(false),
got_first_paint_(false),
restore_started_(restore_started),
tab_count_(0),
max_parallel_tab_loads_(0) {
this_retainer_ = this;
registrar_.Add(
this, content::NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
content::NotificationService::AllSources());
}
SessionRestoreStatsCollector::~SessionRestoreStatsCollector() {
DCHECK((got_first_paint_ || render_widget_hosts_to_paint_.empty()) &&
tabs_tracked_.empty() && render_widget_hosts_loading_.empty());
DCHECK(shared_collector_ == this);
shared_collector_ = nullptr;
}
void SessionRestoreStatsCollector::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
switch (type) {
case content::NOTIFICATION_LOAD_START: {
// Add this render_widget_host to the set of those we're waiting for
// paints on. We want to only record stats for paints that occur after
// a load has finished.
NavigationController* tab =
content::Source<NavigationController>(source).ptr();
RenderWidgetHost* render_widget_host = GetRenderWidgetHost(tab);
DCHECK(render_widget_host);
render_widget_hosts_loading_.insert(render_widget_host);
break;
}
case content::NOTIFICATION_WEB_CONTENTS_DESTROYED: {
WebContents* web_contents = content::Source<WebContents>(source).ptr();
RemoveTab(&web_contents->GetController());
break;
}
case content::NOTIFICATION_LOAD_STOP: {
NavigationController* tab =
content::Source<NavigationController>(source).ptr();
RenderWidgetHost* render_widget_host = GetRenderWidgetHost(tab);
render_widget_hosts_to_paint_.insert(render_widget_host);
RemoveTab(tab);
if (!got_first_foreground_load_ && render_widget_host &&
render_widget_host->GetView() &&
render_widget_host->GetView()->IsShowing()) {
got_first_foreground_load_ = true;
base::TimeDelta time_to_load =
base::TimeTicks::Now() - restore_started_;
UMA_HISTOGRAM_CUSTOM_TIMES("SessionRestore.ForegroundTabFirstLoaded",
time_to_load,
base::TimeDelta::FromMilliseconds(10),
base::TimeDelta::FromSeconds(100), 100);
// Record a time for the number of tabs, to help track down
// contention.
std::string time_for_count = base::StringPrintf(
"SessionRestore.ForegroundTabFirstLoaded_%d", tab_count_);
base::HistogramBase* counter_for_count =
base::Histogram::FactoryTimeGet(
time_for_count, base::TimeDelta::FromMilliseconds(10),
base::TimeDelta::FromSeconds(100), 100,
base::Histogram::kUmaTargetedHistogramFlag);
counter_for_count->AddTime(time_to_load);
}
break;
}
case content::NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE: {
RenderWidgetHost* render_widget_host =
content::Source<RenderWidgetHost>(source).ptr();
if (!got_first_paint_ && render_widget_host->GetView() &&
render_widget_host->GetView()->IsShowing()) {
if (render_widget_hosts_to_paint_.find(render_widget_host) !=
render_widget_hosts_to_paint_.end()) {
// Got a paint for one of our renderers, so record time.
got_first_paint_ = true;
base::TimeDelta time_to_paint =
base::TimeTicks::Now() - restore_started_;
// TODO(danduong): to remove this with 467680, to make sure we
// don't forget to clean this up.
UMA_HISTOGRAM_CUSTOM_TIMES("SessionRestore.ForegroundTabFirstPaint",
time_to_paint,
base::TimeDelta::FromMilliseconds(10),
base::TimeDelta::FromSeconds(100), 100);
// Record a time for the number of tabs, to help track down
// contention.
std::string time_for_count = base::StringPrintf(
"SessionRestore.ForegroundTabFirstPaint_%d", tab_count_);
base::HistogramBase* counter_for_count =
base::Histogram::FactoryTimeGet(
time_for_count, base::TimeDelta::FromMilliseconds(10),
base::TimeDelta::FromSeconds(100), 100,
base::Histogram::kUmaTargetedHistogramFlag);
counter_for_count->AddTime(time_to_paint);
UMA_HISTOGRAM_CUSTOM_TIMES("SessionRestore.ForegroundTabFirstPaint2",
time_to_paint,
base::TimeDelta::FromMilliseconds(100),
base::TimeDelta::FromMinutes(16), 50);
// Record a time for the number of tabs, to help track down
// contention.
std::string time_for_count2 = base::StringPrintf(
"SessionRestore.ForegroundTabFirstPaint2_%d", tab_count_);
base::HistogramBase* counter_for_count2 =
base::Histogram::FactoryTimeGet(
time_for_count2, base::TimeDelta::FromMilliseconds(100),
base::TimeDelta::FromMinutes(16), 50,
base::Histogram::kUmaTargetedHistogramFlag);
counter_for_count2->AddTime(time_to_paint);
} else if (render_widget_hosts_loading_.find(render_widget_host) ==
render_widget_hosts_loading_.end()) {
// If this is a host for a tab we're not loading some other tab
// has rendered and there's no point tracking the time. This could
// happen because the user opened a different tab or restored tabs
// to an already existing browser and an existing tab painted.
got_first_paint_ = true;
}
}
break;
}
default:
NOTREACHED() << "Unknown notification received:" << type;
break;
}
// Check if we are done and if so, reset |this_retainer_| as the collector no
// longer needs to stay alive.
if ((got_first_paint_ || render_widget_hosts_to_paint_.empty()) &&
tabs_tracked_.empty() && render_widget_hosts_loading_.empty())
this_retainer_ = nullptr;
}
void SessionRestoreStatsCollector::AddTabs(
const std::vector<SessionRestoreDelegate::RestoredTab>& tabs) {
tab_count_ += tabs.size();
for (auto& tab : tabs) {
RegisterForNotifications(&tab.contents()->GetController());
if (tab.is_active()) {
RenderWidgetHost* render_widget_host =
GetRenderWidgetHost(&tab.contents()->GetController());
render_widget_hosts_loading_.insert(render_widget_host);
}
}
}
void SessionRestoreStatsCollector::RemoveTab(NavigationController* tab) {
registrar_.Remove(this, content::NOTIFICATION_WEB_CONTENTS_DESTROYED,
content::Source<WebContents>(tab->GetWebContents()));
registrar_.Remove(this, content::NOTIFICATION_LOAD_STOP,
content::Source<NavigationController>(tab));
registrar_.Remove(this, content::NOTIFICATION_LOAD_START,
content::Source<NavigationController>(tab));
if (render_widget_hosts_loading_.size() > max_parallel_tab_loads_)
max_parallel_tab_loads_ = render_widget_hosts_loading_.size();
RenderWidgetHost* render_widget_host = GetRenderWidgetHost(tab);
render_widget_hosts_loading_.erase(render_widget_host);
tabs_tracked_.erase(tab);
// If there are no more tabs loading or being tracked, restore is done and
// record the time. Note that we are not yet finished, as we might still be
// waiting for our first paint, which can happen after all tabs are done
// loading.
// TODO(georgesak): review behaviour of ForegroundTabFirstPaint.
if (tabs_tracked_.empty() && render_widget_hosts_loading_.empty()) {
base::TimeDelta time_to_load = base::TimeTicks::Now() - restore_started_;
UMA_HISTOGRAM_CUSTOM_TIMES("SessionRestore.AllTabsLoaded", time_to_load,
base::TimeDelta::FromMilliseconds(10),
base::TimeDelta::FromSeconds(100), 100);
// Record a time for the number of tabs, to help track down contention.
std::string time_for_count =
base::StringPrintf("SessionRestore.AllTabsLoaded_%d", tab_count_);
base::HistogramBase* counter_for_count = base::Histogram::FactoryTimeGet(
time_for_count, base::TimeDelta::FromMilliseconds(10),
base::TimeDelta::FromSeconds(100), 100,
base::Histogram::kUmaTargetedHistogramFlag);
counter_for_count->AddTime(time_to_load);
UMA_HISTOGRAM_COUNTS_100("SessionRestore.ParallelTabLoads",
max_parallel_tab_loads_);
}
}
void SessionRestoreStatsCollector::RegisterForNotifications(
NavigationController* tab) {
registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_DESTROYED,
content::Source<WebContents>(tab->GetWebContents()));
registrar_.Add(this, content::NOTIFICATION_LOAD_STOP,
content::Source<NavigationController>(tab));
registrar_.Add(this, content::NOTIFICATION_LOAD_START,
content::Source<NavigationController>(tab));
tabs_tracked_.insert(tab);
}
RenderWidgetHost* SessionRestoreStatsCollector::GetRenderWidgetHost(
NavigationController* tab) {
WebContents* web_contents = tab->GetWebContents();
if (web_contents) {
content::RenderWidgetHostView* render_widget_host_view =
web_contents->GetRenderWidgetHostView();
if (render_widget_host_view)
return render_widget_host_view->GetRenderWidgetHost();
}
return nullptr;
}
// static
SessionRestoreStatsCollector* SessionRestoreStatsCollector::shared_collector_ =
nullptr;
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