src/content/common/gpu/gpu_memory_manager_unittest.cc

   1 // Copyright (c) 2012 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 #include "content/common/gpu/gpu_memory_manager.h"
   6 #include "content/common/gpu/gpu_memory_manager_client.h"
   7 #include "content/common/gpu/gpu_memory_tracking.h"
   8 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
   9 #include "ui/gfx/size_conversions.h"
  10
  11 #include "testing/gtest/include/gtest/gtest.h"
  12
  13 using gpu::MemoryAllocation;
  14 using gpu::ManagedMemoryStats;
  15
  16 #if defined(COMPILER_GCC)
  17 namespace BASE_HASH_NAMESPACE {
  18 template<>
  19 struct hash<content::GpuMemoryManagerClient*> {
  20   uint64 operator()(content::GpuMemoryManagerClient* ptr) const {
  21     return hash<uint64>()(reinterpret_cast<uint64>(ptr));
  22   }
  23 };
  24 }  // namespace BASE_HASH_NAMESPACE
  25 #endif  // COMPILER
  26
  27 class FakeMemoryTracker : public gpu::gles2::MemoryTracker {
  28  public:
  29   virtual void TrackMemoryAllocatedChange(
  30       size_t /* old_size */,
  31       size_t /* new_size */,
  32       gpu::gles2::MemoryTracker::Pool /* pool */) OVERRIDE {
  33   }
  34   virtual bool EnsureGPUMemoryAvailable(size_t /* size_needed */) OVERRIDE {
  35     return true;
  36   }
  37  private:
  38   virtual ~FakeMemoryTracker() {
  39   }
  40 };
  41
  42 namespace content {
  43
  44 // This class is used to collect all stub assignments during a
  45 // Manage() call.
  46 class ClientAssignmentCollector {
  47  public:
  48   struct ClientMemoryStat {
  49     MemoryAllocation allocation;
  50   };
  51   typedef base::hash_map<GpuMemoryManagerClient*, ClientMemoryStat>
  52       ClientMemoryStatMap;
  53
  54   static const ClientMemoryStatMap& GetClientStatsForLastManage() {
  55     return client_memory_stats_for_last_manage_;
  56   }
  57   static void ClearAllStats() {
  58     client_memory_stats_for_last_manage_.clear();
  59   }
  60   static void AddClientStat(GpuMemoryManagerClient* client,
  61                           const MemoryAllocation& allocation) {
  62     DCHECK(!client_memory_stats_for_last_manage_.count(client));
  63     client_memory_stats_for_last_manage_[client].allocation = allocation;
  64   }
  65
  66  private:
  67   static ClientMemoryStatMap client_memory_stats_for_last_manage_;
  68 };
  69
  70 ClientAssignmentCollector::ClientMemoryStatMap
  71     ClientAssignmentCollector::client_memory_stats_for_last_manage_;
  72
  73 class FakeClient : public GpuMemoryManagerClient {
  74  public:
  75   GpuMemoryManager* memmgr_;
  76   bool suggest_have_frontbuffer_;
  77   MemoryAllocation allocation_;
  78   uint64 total_gpu_memory_;
  79   gfx::Size surface_size_;
  80   GpuMemoryManagerClient* share_group_;
  81   scoped_refptr<gpu::gles2::MemoryTracker> memory_tracker_;
  82   scoped_ptr<GpuMemoryTrackingGroup> tracking_group_;
  83   scoped_ptr<GpuMemoryManagerClientState> client_state_;
  84
  85   // This will create a client with no surface
  86   FakeClient(GpuMemoryManager* memmgr, GpuMemoryManagerClient* share_group)
  87       : memmgr_(memmgr),
  88         suggest_have_frontbuffer_(false),
  89         total_gpu_memory_(0),
  90         share_group_(share_group),
  91         memory_tracker_(NULL) {
  92     if (!share_group_) {
  93       memory_tracker_ = new FakeMemoryTracker();
  94       tracking_group_.reset(
  95           memmgr_->CreateTrackingGroup(0, memory_tracker_.get()));
  96     }
  97     client_state_.reset(memmgr_->CreateClientState(this, false, true));
  98   }
  99
 100   // This will create a client with a surface
 101   FakeClient(GpuMemoryManager* memmgr, int32 surface_id, bool visible)
 102       : memmgr_(memmgr),
 103         suggest_have_frontbuffer_(false),
 104         total_gpu_memory_(0),
 105         share_group_(NULL),
 106         memory_tracker_(NULL) {
 107     memory_tracker_ = new FakeMemoryTracker();
 108     tracking_group_.reset(
 109         memmgr_->CreateTrackingGroup(0, memory_tracker_.get()));
 110     client_state_.reset(
 111         memmgr_->CreateClientState(this, surface_id != 0, visible));
 112   }
 113
 114   virtual ~FakeClient() {
 115     client_state_.reset();
 116     tracking_group_.reset();
 117     memory_tracker_ = NULL;
 118   }
 119
 120   virtual void SetMemoryAllocation(const MemoryAllocation& alloc) OVERRIDE {
 121     allocation_ = alloc;
 122     ClientAssignmentCollector::AddClientStat(this, alloc);
 123   }
 124
 125   virtual void SuggestHaveFrontBuffer(bool suggest_have_frontbuffer) OVERRIDE {
 126     suggest_have_frontbuffer_ = suggest_have_frontbuffer;
 127   }
 128
 129   virtual bool GetTotalGpuMemory(uint64* bytes) OVERRIDE {
 130     if (total_gpu_memory_) {
 131       *bytes = total_gpu_memory_;
 132       return true;
 133     }
 134     return false;
 135   }
 136   void SetTotalGpuMemory(uint64 bytes) { total_gpu_memory_ = bytes; }
 137
 138   virtual gpu::gles2::MemoryTracker* GetMemoryTracker() const OVERRIDE {
 139     if (share_group_)
 140       return share_group_->GetMemoryTracker();
 141     return memory_tracker_.get();
 142   }
 143
 144   virtual gfx::Size GetSurfaceSize() const OVERRIDE {
 145     return surface_size_;
 146   }
 147   void SetSurfaceSize(gfx::Size size) { surface_size_ = size; }
 148
 149   void SetVisible(bool visible) {
 150     client_state_->SetVisible(visible);
 151   }
 152
 153   void SetManagedMemoryStats(const ManagedMemoryStats& stats) {
 154     client_state_->SetManagedMemoryStats(stats);
 155   }
 156
 157   uint64 BytesWhenVisible() const {
 158     return allocation_.bytes_limit_when_visible;
 159   }
 160 };
 161
 162 class GpuMemoryManagerTest : public testing::Test {
 163  protected:
 164   static const uint64 kFrontbufferLimitForTest = 3;
 165
 166   GpuMemoryManagerTest()
 167       : memmgr_(0, kFrontbufferLimitForTest) {
 168     memmgr_.TestingDisableScheduleManage();
 169   }
 170
 171   virtual void SetUp() {
 172   }
 173
 174   static int32 GenerateUniqueSurfaceId() {
 175     static int32 surface_id_ = 1;
 176     return surface_id_++;
 177   }
 178
 179   bool IsAllocationForegroundForSurfaceYes(
 180       const MemoryAllocation& alloc) {
 181     return true;
 182   }
 183   bool IsAllocationBackgroundForSurfaceYes(
 184       const MemoryAllocation& alloc) {
 185     return true;
 186   }
 187   bool IsAllocationHibernatedForSurfaceYes(
 188       const MemoryAllocation& alloc) {
 189     return true;
 190   }
 191   bool IsAllocationForegroundForSurfaceNo(
 192       const MemoryAllocation& alloc) {
 193     return alloc.bytes_limit_when_visible ==
 194                GetMinimumClientAllocation();
 195   }
 196   bool IsAllocationBackgroundForSurfaceNo(
 197       const MemoryAllocation& alloc) {
 198     return alloc.bytes_limit_when_visible ==
 199                GetMinimumClientAllocation();
 200   }
 201   bool IsAllocationHibernatedForSurfaceNo(
 202       const MemoryAllocation& alloc) {
 203     return alloc.bytes_limit_when_visible == 0;
 204   }
 205
 206   void Manage() {
 207     ClientAssignmentCollector::ClearAllStats();
 208     memmgr_.Manage();
 209   }
 210
 211   uint64 CalcAvailableFromGpuTotal(uint64 bytes) {
 212     return GpuMemoryManager::CalcAvailableFromGpuTotal(bytes);
 213   }
 214
 215   uint64 CalcAvailableClamped(uint64 bytes) {
 216     bytes = std::max(bytes, memmgr_.GetDefaultAvailableGpuMemory());
 217     bytes = std::min(bytes, memmgr_.GetMaximumTotalGpuMemory());
 218     return bytes;
 219   }
 220
 221   uint64 GetAvailableGpuMemory() {
 222     return memmgr_.GetAvailableGpuMemory();
 223   }
 224
 225   uint64 GetMaximumClientAllocation() {
 226     return memmgr_.GetMaximumClientAllocation();
 227   }
 228
 229   uint64 GetMinimumClientAllocation() {
 230     return memmgr_.GetMinimumClientAllocation();
 231   }
 232
 233   void SetClientStats(
 234       FakeClient* client,
 235       uint64 required,
 236       uint64 nicetohave) {
 237     client->SetManagedMemoryStats(
 238         ManagedMemoryStats(required, nicetohave, 0, false));
 239   }
 240
 241   GpuMemoryManager memmgr_;
 242 };
 243
 244 // Test GpuMemoryManager::Manage basic functionality.
 245 // Expect memory allocation to set suggest_have_frontbuffer/backbuffer
 246 // according to visibility and last used time for stubs with surface.
 247 // Expect memory allocation to be shared according to share groups for stubs
 248 // without a surface.
 249 TEST_F(GpuMemoryManagerTest, TestManageBasicFunctionality) {
 250   // Test stubs with surface.
 251   FakeClient stub1(&memmgr_, GenerateUniqueSurfaceId(), true),
 252              stub2(&memmgr_, GenerateUniqueSurfaceId(), false);
 253
 254   Manage();
 255   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub1.allocation_));
 256   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub2.allocation_));
 257
 258   // Test stubs without surface, with share group of 1 stub.
 259   FakeClient stub3(&memmgr_, &stub1), stub4(&memmgr_, &stub2);
 260
 261   Manage();
 262   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub1.allocation_));
 263   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub2.allocation_));
 264   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub3.allocation_));
 265   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub4.allocation_));
 266
 267   // Test stub without surface, with share group of multiple stubs.
 268   FakeClient stub5(&memmgr_ , &stub2);
 269
 270   Manage();
 271   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub4.allocation_));
 272 }
 273
 274 // Test GpuMemoryManager::Manage functionality: changing visibility.
 275 // Expect memory allocation to set suggest_have_frontbuffer/backbuffer
 276 // according to visibility and last used time for stubs with surface.
 277 // Expect memory allocation to be shared according to share groups for stubs
 278 // without a surface.
 279 TEST_F(GpuMemoryManagerTest, TestManageChangingVisibility) {
 280   FakeClient stub1(&memmgr_, GenerateUniqueSurfaceId(), true),
 281              stub2(&memmgr_, GenerateUniqueSurfaceId(), false);
 282
 283   FakeClient stub3(&memmgr_, &stub1), stub4(&memmgr_, &stub2);
 284   FakeClient stub5(&memmgr_ , &stub2);
 285
 286   Manage();
 287   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub1.allocation_));
 288   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub2.allocation_));
 289   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub3.allocation_));
 290   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub4.allocation_));
 291   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub5.allocation_));
 292
 293   stub1.SetVisible(false);
 294   stub2.SetVisible(true);
 295
 296   Manage();
 297   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub1.allocation_));
 298   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub2.allocation_));
 299   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub3.allocation_));
 300   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub4.allocation_));
 301   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub5.allocation_));
 302 }
 303
 304 // Test GpuMemoryManager::Manage functionality: Test more than threshold number
 305 // of visible stubs.
 306 // Expect all allocations to continue to have frontbuffer.
 307 TEST_F(GpuMemoryManagerTest, TestManageManyVisibleStubs) {
 308   FakeClient stub1(&memmgr_, GenerateUniqueSurfaceId(), true),
 309              stub2(&memmgr_, GenerateUniqueSurfaceId(), true),
 310              stub3(&memmgr_, GenerateUniqueSurfaceId(), true),
 311              stub4(&memmgr_, GenerateUniqueSurfaceId(), true);
 312
 313   FakeClient stub5(&memmgr_ , &stub1), stub6(&memmgr_ , &stub2);
 314   FakeClient stub7(&memmgr_ , &stub2);
 315
 316   Manage();
 317   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub1.allocation_));
 318   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub2.allocation_));
 319   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub3.allocation_));
 320   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub4.allocation_));
 321   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub5.allocation_));
 322   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub6.allocation_));
 323   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub7.allocation_));
 324 }
 325
 326 // Test GpuMemoryManager::Manage functionality: Test more than threshold number
 327 // of not visible stubs.
 328 // Expect the stubs surpassing the threshold to not have a backbuffer.
 329 TEST_F(GpuMemoryManagerTest, TestManageManyNotVisibleStubs) {
 330   FakeClient stub1(&memmgr_, GenerateUniqueSurfaceId(), true),
 331              stub2(&memmgr_, GenerateUniqueSurfaceId(), true),
 332              stub3(&memmgr_, GenerateUniqueSurfaceId(), true),
 333              stub4(&memmgr_, GenerateUniqueSurfaceId(), true);
 334   stub4.SetVisible(false);
 335   stub3.SetVisible(false);
 336   stub2.SetVisible(false);
 337   stub1.SetVisible(false);
 338
 339   FakeClient stub5(&memmgr_ , &stub1), stub6(&memmgr_ , &stub4);
 340   FakeClient stub7(&memmgr_ , &stub1);
 341
 342   Manage();
 343   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub1.allocation_));
 344   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub2.allocation_));
 345   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub3.allocation_));
 346   EXPECT_TRUE(IsAllocationHibernatedForSurfaceYes(stub4.allocation_));
 347   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub5.allocation_));
 348   EXPECT_TRUE(IsAllocationHibernatedForSurfaceNo(stub6.allocation_));
 349   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub7.allocation_));
 350 }
 351
 352 // Test GpuMemoryManager::Manage functionality: Test changing the last used
 353 // time of stubs when doing so causes change in which stubs surpass threshold.
 354 // Expect frontbuffer to be dropped for the older stub.
 355 TEST_F(GpuMemoryManagerTest, TestManageChangingLastUsedTime) {
 356   FakeClient stub1(&memmgr_, GenerateUniqueSurfaceId(), true),
 357              stub2(&memmgr_, GenerateUniqueSurfaceId(), true),
 358              stub3(&memmgr_, GenerateUniqueSurfaceId(), true),
 359              stub4(&memmgr_, GenerateUniqueSurfaceId(), true);
 360
 361   FakeClient stub5(&memmgr_ , &stub3), stub6(&memmgr_ , &stub4);
 362   FakeClient stub7(&memmgr_ , &stub3);
 363
 364   // Make stub4 be the least-recently-used client
 365   stub4.SetVisible(false);
 366   stub3.SetVisible(false);
 367   stub2.SetVisible(false);
 368   stub1.SetVisible(false);
 369
 370   Manage();
 371   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub1.allocation_));
 372   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub2.allocation_));
 373   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub3.allocation_));
 374   EXPECT_TRUE(IsAllocationHibernatedForSurfaceYes(stub4.allocation_));
 375   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub5.allocation_));
 376   EXPECT_TRUE(IsAllocationHibernatedForSurfaceNo(stub6.allocation_));
 377   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub7.allocation_));
 378
 379   // Make stub3 become the least-recently-used client.
 380   stub2.SetVisible(true);
 381   stub2.SetVisible(false);
 382   stub4.SetVisible(true);
 383   stub4.SetVisible(false);
 384
 385   Manage();
 386   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub1.allocation_));
 387   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub2.allocation_));
 388   EXPECT_TRUE(IsAllocationHibernatedForSurfaceYes(stub3.allocation_));
 389   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub4.allocation_));
 390   EXPECT_TRUE(IsAllocationHibernatedForSurfaceNo(stub5.allocation_));
 391   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub6.allocation_));
 392   EXPECT_TRUE(IsAllocationHibernatedForSurfaceNo(stub7.allocation_));
 393 }
 394
 395 // Test GpuMemoryManager::Manage functionality: Test changing importance of
 396 // enough stubs so that every stub in share group crosses threshold.
 397 // Expect memory allocation of the stubs without surface to share memory
 398 // allocation with the most visible stub in share group.
 399 TEST_F(GpuMemoryManagerTest, TestManageChangingImportanceShareGroup) {
 400   FakeClient stub_ignore_a(&memmgr_, GenerateUniqueSurfaceId(), true),
 401              stub_ignore_b(&memmgr_, GenerateUniqueSurfaceId(), false),
 402              stub_ignore_c(&memmgr_, GenerateUniqueSurfaceId(), false);
 403   FakeClient stub1(&memmgr_, GenerateUniqueSurfaceId(), false),
 404              stub2(&memmgr_, GenerateUniqueSurfaceId(), false);
 405
 406   FakeClient stub3(&memmgr_, &stub2), stub4(&memmgr_, &stub2);
 407
 408   // stub1 and stub2 keep their non-hibernated state because they're
 409   // either visible or the 2 most recently used clients (through the
 410   // first three checks).
 411   stub1.SetVisible(true);
 412   stub2.SetVisible(true);
 413   Manage();
 414   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub1.allocation_));
 415   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub2.allocation_));
 416   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub3.allocation_));
 417   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub4.allocation_));
 418
 419   stub1.SetVisible(false);
 420   Manage();
 421   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub1.allocation_));
 422   EXPECT_TRUE(IsAllocationForegroundForSurfaceYes(stub2.allocation_));
 423   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub3.allocation_));
 424   EXPECT_TRUE(IsAllocationForegroundForSurfaceNo(stub4.allocation_));
 425
 426   stub2.SetVisible(false);
 427   Manage();
 428   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub1.allocation_));
 429   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub2.allocation_));
 430   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub3.allocation_));
 431   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub4.allocation_));
 432
 433   // stub_ignore_b will cause stub1 to become hibernated (because
 434   // stub_ignore_a, stub_ignore_b, and stub2 are all non-hibernated and more
 435   // important).
 436   stub_ignore_b.SetVisible(true);
 437   stub_ignore_b.SetVisible(false);
 438   Manage();
 439   EXPECT_TRUE(IsAllocationHibernatedForSurfaceYes(stub1.allocation_));
 440   EXPECT_TRUE(IsAllocationBackgroundForSurfaceYes(stub2.allocation_));
 441   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub3.allocation_));
 442   EXPECT_TRUE(IsAllocationBackgroundForSurfaceNo(stub4.allocation_));
 443
 444   // stub_ignore_c will cause stub2 to become hibernated (because
 445   // stub_ignore_a, stub_ignore_b, and stub_ignore_c are all non-hibernated
 446   // and more important).
 447   stub_ignore_c.SetVisible(true);
 448   stub_ignore_c.SetVisible(false);
 449   Manage();
 450   EXPECT_TRUE(IsAllocationHibernatedForSurfaceYes(stub1.allocation_));
 451   EXPECT_TRUE(IsAllocationHibernatedForSurfaceYes(stub2.allocation_));
 452   EXPECT_TRUE(IsAllocationHibernatedForSurfaceNo(stub3.allocation_));
 453   EXPECT_TRUE(IsAllocationHibernatedForSurfaceNo(stub4.allocation_));
 454 }
 455
 456 // Test GpuMemoryManager::UpdateAvailableGpuMemory functionality
 457 TEST_F(GpuMemoryManagerTest, TestUpdateAvailableGpuMemory) {
 458   FakeClient stub1(&memmgr_, GenerateUniqueSurfaceId(), true),
 459              stub2(&memmgr_, GenerateUniqueSurfaceId(), false),
 460              stub3(&memmgr_, GenerateUniqueSurfaceId(), true),
 461              stub4(&memmgr_, GenerateUniqueSurfaceId(), false);
 462   // We take the lowest GPU's total memory as the limit
 463   uint64 expected = 400 * 1024 * 1024;
 464   stub1.SetTotalGpuMemory(expected); // GPU Memory
 465   stub2.SetTotalGpuMemory(expected - 1024 * 1024); // Smaller but not visible.
 466   stub3.SetTotalGpuMemory(expected + 1024 * 1024); // Visible but larger.
 467   stub4.SetTotalGpuMemory(expected + 1024 * 1024); // Not visible and larger.
 468   Manage();
 469   uint64 bytes_expected = CalcAvailableFromGpuTotal(expected);
 470   EXPECT_EQ(GetAvailableGpuMemory(), CalcAvailableClamped(bytes_expected));
 471 }
 472
 473 // Test GpuMemoryManager Stub Memory Stats functionality:
 474 // Creates various surface/non-surface stubs and switches stub visibility and
 475 // tests to see that stats data structure values are correct.
 476 TEST_F(GpuMemoryManagerTest, StubMemoryStatsForLastManageTests) {
 477   ClientAssignmentCollector::ClientMemoryStatMap stats;
 478
 479   Manage();
 480   stats = ClientAssignmentCollector::GetClientStatsForLastManage();
 481   EXPECT_EQ(stats.size(), 0ul);
 482
 483   FakeClient stub1(&memmgr_, GenerateUniqueSurfaceId(), true);
 484   Manage();
 485   stats = ClientAssignmentCollector::GetClientStatsForLastManage();
 486   uint64 stub1allocation1 =
 487       stats[&stub1].allocation.bytes_limit_when_visible;
 488
 489   EXPECT_EQ(stats.size(), 1ul);
 490   EXPECT_GT(stub1allocation1, 0ul);
 491
 492   FakeClient stub2(&memmgr_, &stub1);
 493   Manage();
 494   stats = ClientAssignmentCollector::GetClientStatsForLastManage();
 495   EXPECT_EQ(stats.count(&stub1), 1ul);
 496   uint64 stub1allocation2 =
 497       stats[&stub1].allocation.bytes_limit_when_visible;
 498   EXPECT_EQ(stats.count(&stub2), 1ul);
 499   uint64 stub2allocation2 =
 500       stats[&stub2].allocation.bytes_limit_when_visible;
 501
 502   EXPECT_EQ(stats.size(), 2ul);
 503   EXPECT_GT(stub1allocation2, 0ul);
 504   EXPECT_GT(stub2allocation2, 0ul);
 505   if (stub1allocation2 != GetMaximumClientAllocation())
 506     EXPECT_LT(stub1allocation2, stub1allocation1);
 507
 508   FakeClient stub3(&memmgr_, GenerateUniqueSurfaceId(), true);
 509   Manage();
 510   stats = ClientAssignmentCollector::GetClientStatsForLastManage();
 511   uint64 stub1allocation3 =
 512       stats[&stub1].allocation.bytes_limit_when_visible;
 513   uint64 stub2allocation3 =
 514       stats[&stub2].allocation.bytes_limit_when_visible;
 515   uint64 stub3allocation3 =
 516       stats[&stub3].allocation.bytes_limit_when_visible;
 517
 518   EXPECT_EQ(stats.size(), 3ul);
 519   EXPECT_GT(stub1allocation3, 0ul);
 520   EXPECT_GT(stub2allocation3, 0ul);
 521   EXPECT_GT(stub3allocation3, 0ul);
 522   if (stub1allocation3 != GetMaximumClientAllocation())
 523     EXPECT_LT(stub1allocation3, stub1allocation2);
 524
 525   stub1.SetVisible(false);
 526
 527   Manage();
 528   stats = ClientAssignmentCollector::GetClientStatsForLastManage();
 529   uint64 stub1allocation4 =
 530       stats[&stub1].allocation.bytes_limit_when_visible;
 531   uint64 stub2allocation4 =
 532       stats[&stub2].allocation.bytes_limit_when_visible;
 533   uint64 stub3allocation4 =
 534       stats[&stub3].allocation.bytes_limit_when_visible;
 535
 536   EXPECT_EQ(stats.size(), 3ul);
 537   EXPECT_GT(stub1allocation4, 0ul);
 538   EXPECT_GE(stub2allocation4, 0ul);
 539   EXPECT_GT(stub3allocation4, 0ul);
 540   if (stub3allocation3 != GetMaximumClientAllocation())
 541     EXPECT_GT(stub3allocation4, stub3allocation3);
 542 }
 543
 544 // Test tracking of unmanaged (e.g, WebGL) memory.
 545 TEST_F(GpuMemoryManagerTest, UnmanagedTracking) {
 546   // Set memory manager constants for this test
 547   memmgr_.TestingSetAvailableGpuMemory(64);
 548   memmgr_.TestingSetMinimumClientAllocation(8);
 549   memmgr_.TestingSetUnmanagedLimitStep(16);
 550
 551   FakeClient stub1(&memmgr_, GenerateUniqueSurfaceId(), true);
 552
 553   // Expect that the one stub get its nicetohave level.
 554   SetClientStats(&stub1, 16, 32);
 555   Manage();
 556   EXPECT_GE(stub1.BytesWhenVisible(), 32u);
 557
 558   // Now allocate some unmanaged memory and make sure the amount
 559   // goes down.
 560   memmgr_.TrackMemoryAllocatedChange(
 561       stub1.tracking_group_.get(),
 562       0,
 563       48,
 564       gpu::gles2::MemoryTracker::kUnmanaged);
 565   Manage();
 566   EXPECT_LT(stub1.BytesWhenVisible(), 24u);
 567
 568   // Now allocate the entire FB worth of unmanaged memory, and
 569   // make sure that we stay stuck at the minimum tab allocation.
 570   memmgr_.TrackMemoryAllocatedChange(
 571       stub1.tracking_group_.get(),
 572       48,
 573       64,
 574       gpu::gles2::MemoryTracker::kUnmanaged);
 575   Manage();
 576   EXPECT_EQ(stub1.BytesWhenVisible(), 8u);
 577
 578   // Far-oversubscribe the entire FB, and make sure we stay at
 579   // the minimum allocation, and don't blow up.
 580   memmgr_.TrackMemoryAllocatedChange(
 581       stub1.tracking_group_.get(),
 582       64,
 583       999,
 584       gpu::gles2::MemoryTracker::kUnmanaged);
 585   Manage();
 586   EXPECT_EQ(stub1.BytesWhenVisible(), 8u);
 587
 588   // Delete all tracked memory so we don't hit leak checks.
 589   memmgr_.TrackMemoryAllocatedChange(
 590       stub1.tracking_group_.get(),
 591       999,
 592       0,
 593       gpu::gles2::MemoryTracker::kUnmanaged);
 594 }
 595
 596 // Test the default allocation levels are used.
 597 TEST_F(GpuMemoryManagerTest, DefaultAllocation) {
 598   // Set memory manager constants for this test
 599   memmgr_.TestingSetAvailableGpuMemory(64);
 600   memmgr_.TestingSetMinimumClientAllocation(8);
 601   memmgr_.TestingSetDefaultClientAllocation(16);
 602
 603   FakeClient stub1(&memmgr_, GenerateUniqueSurfaceId(), true);
 604
 605   // Expect that a client which has not sent stats receive at
 606   // least the default allocation.
 607   Manage();
 608   EXPECT_GE(stub1.BytesWhenVisible(),
 609             memmgr_.GetDefaultClientAllocation());
 610 }
 611
 612 }  // namespace content