Session/tab sync performance tests.

chrome/test/live_sync/performance/sessions_sync_perf_test.cc

+// Copyright (c) 2011 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 "base/stringprintf.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/sync/profile_sync_service_harness.h"
+#include "chrome/test/live_sync/performance/sync_timing_helper.h"
+#include "chrome/test/live_sync/live_sessions_sync_test.h"
+
+// TODO(braffert): Move kNumBenchmarkPoints and kBenchmarkPoints for all
+// datatypes into a performance test base class, once it is possible to do so.
+static const int kNumTabs = 150;
+static const int kNumBenchmarkPoints = 18;
+static const int kBenchmarkPoints[] = {1, 10, 20, 30, 40, 50, 75, 100, 125,
+                                       150, 175, 200, 225, 250, 300, 350,
+                                       400, 500};
+
+class SessionsSyncPerfTest: public TwoClientLiveSessionsSyncTest {
+ public:
+  SessionsSyncPerfTest() : url_number(0) {}
+
+  // Opens |num_tabs| new tabs on |profile|.
+  void AddTabs(int profile, int num_tabs);
+
+  // Update all tabs in |profile| by visiting a new URL.
+  void UpdateTabs(int profile);
+
+  // Close all tabs in |profile|.
+  void RemoveTabs(int profile);
+
+  // Returns the number of open tabs in all sessions (local + foreign) for
+  // |profile|.  Returns -1 on failure.
+  int GetTabCount(int profile);
+
+  // Closes all tabs for all profiles.  Called between benchmark iterations.
+  void Cleanup();
+
+ private:
+  // Returns a new unique URL.
+  GURL NextURL();
+
+  // Returns a unique URL according to the integer |n|.
+  GURL IntToURL(int n);
+
+  int url_number;
+  DISALLOW_COPY_AND_ASSIGN(SessionsSyncPerfTest);
+};
+
+void SessionsSyncPerfTest::AddTabs(int profile, int num_tabs) {
+  std::vector<GURL> urls;
+  for (int i = 0; i < num_tabs; ++i) {
+    urls.push_back(NextURL());
+  }
+  OpenMultipleTabs(profile, urls);
+}
+
+void SessionsSyncPerfTest::UpdateTabs(int profile) {
+  Browser* browser = GetBrowser(profile);
+  GURL url;
+  std::vector<GURL> urls;
+  for (int i = 0; i < browser->tab_count(); ++i) {
+    browser->SelectNumberedTab(i);
+    url = NextURL();
+    browser->OpenURL(
+        OpenURLParams(url, GURL("www.google.com"), CURRENT_TAB, 0));
+    urls.push_back(url);
+  }
+  AwaitSessionPropagation(profile, urls);
+}
+
+void SessionsSyncPerfTest::RemoveTabs(int profile) {
+  GetBrowser(profile)->CloseAllTabs();
+}
+
+int SessionsSyncPerfTest::GetTabCount(int profile) {
+  int tab_count = 0;
+  const SyncedSession* local_session;
+  std::vector<const SyncedSession*> sessions;
+
+  if (!GetLocalSession(profile, &local_session)) {
+    VLOG(1) << "GetLocalSession returned false";
+    return -1;
+  }
+
+  if (!GetSessionData(profile, &sessions)) {
+    // Foreign session data may be empty.  In this case we only count tabs in
+    // the local session.
+    VLOG(1) << "GetSessionData returned false";

[braffert, 2011/08/04 23:47:34]

Intentionally not returning -1 here.  GetSessionData returns false if there is
no foreign session data, in which case we should continue with counting the tabs
in the local session.

+  }
+
+  sessions.push_back(local_session);
+  for (std::vector<const SyncedSession*>::const_iterator it = sessions.begin();
+       it != sessions.end(); ++it) {
+    for (std::vector<SessionWindow*>::const_iterator win_it =
+             (*it)->windows.begin(); win_it != (*it)->windows.end(); ++win_it) {
+      tab_count += (*win_it)->tabs.size();
+    }
+  }
+  return tab_count;
+}
+
+void SessionsSyncPerfTest::Cleanup() {
+  for (int i = 0; i < num_clients(); ++i) {
+    RemoveTabs(i);
+  }
+  ASSERT_TRUE(AwaitQuiescence());
+  ASSERT_EQ(0, GetTabCount(0));

[Nicolas Zea, 2011/08/05 00:40:02]

Doesn't this wind up being 1 (due to the NTP you mentioned)?

[braffert, 2011/08/05 00:47:38]

Yes, nice catch.  This method is only called from the disabled benchmark test,
which is not automated but used for generating graphs.

+}
+
+GURL SessionsSyncPerfTest::NextURL() {
+  return IntToURL(url_number++);
+}
+
+GURL SessionsSyncPerfTest::IntToURL(int n) {
+  return GURL(StringPrintf("http://history%d.google.com/", n));
+}
+
+IN_PROC_BROWSER_TEST_F(SessionsSyncPerfTest, P0) {
+  ASSERT_TRUE(SetupSync()) << "SetupSync() failed.";
+
+  AddTabs(0, kNumTabs);
+  base::TimeDelta dt =
+      SyncTimingHelper::TimeMutualSyncCycle(GetClient(0), GetClient(1));
+  ASSERT_EQ(kNumTabs, GetTabCount(0));
+  ASSERT_EQ(kNumTabs, GetTabCount(1));
+  SyncTimingHelper::PrintResult("tabs", "add", dt);
+
+  UpdateTabs(0);
+  dt = SyncTimingHelper::TimeMutualSyncCycle(GetClient(0), GetClient(1));
+  ASSERT_EQ(kNumTabs, GetTabCount(0));
+  ASSERT_EQ(kNumTabs, GetTabCount(1));
+  SyncTimingHelper::PrintResult("tabs", "update", dt);
+
+  RemoveTabs(0);
+  dt = SyncTimingHelper::TimeMutualSyncCycle(GetClient(0), GetClient(1));
+  // New tab page opens after closing all tabs.

[Nicolas Zea, 2011/08/05 00:40:02]

"New tab page remains on profile 0 after..."

[braffert, 2011/08/05 17:43:55]

Done.

+  ASSERT_EQ(1, GetTabCount(0));
+  ASSERT_EQ(0, GetTabCount(1));
+  SyncTimingHelper::PrintResult("tabs", "delete", dt);
+}
+
+IN_PROC_BROWSER_TEST_F(SessionsSyncPerfTest, DISABLED_Benchmark) {

[Nicolas Zea, 2011/08/05 00:40:02]

Why disabled?

[braffert, 2011/08/05 17:43:55]

We have one of these tests for each datatype - they aren't intended to be
automated.  They can be run offline to generate a graph showing how the
measurement times scale when increasing the number of synced entries.

I'm removing this test for tabs, because CleanUp is causing problems.  I am
considering removing it for the other datatypes as well.

+  ASSERT_TRUE(SetupSync()) << "SetupSync() failed.";
+
+  for (int i = 0; i < kNumBenchmarkPoints; ++i) {
+    int num_tabs = kBenchmarkPoints[i];
+    AddTabs(0, num_tabs);
+    base::TimeDelta dt_add =
+        SyncTimingHelper::TimeMutualSyncCycle(GetClient(0), GetClient(1));
+    ASSERT_EQ(num_tabs, GetTabCount(0));
+    VLOG(0) << std::endl << "Add: " << num_tabs << " " << dt_add.InSecondsF();
+
+    UpdateTabs(0);
+    base::TimeDelta dt_update =
+        SyncTimingHelper::TimeMutualSyncCycle(GetClient(0), GetClient(1));
+    ASSERT_EQ(num_tabs, GetTabCount(0));
+    VLOG(0) << std::endl << "Update: " << num_tabs << " "
+         << dt_update.InSecondsF();
+
+    RemoveTabs(0);
+    base::TimeDelta dt_delete =
+        SyncTimingHelper::TimeMutualSyncCycle(GetClient(0), GetClient(1));
+    ASSERT_EQ(1, GetTabCount(0));
+    VLOG(0) << std::endl << "Delete: " << num_tabs << " "
+            << dt_delete.InSecondsF();
+
+    Cleanup();
+  }
+}