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tile_manager.cc
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// Copyright 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 "cc/tiles/tile_manager.h"
#include <stddef.h>
#include <stdint.h>
#include <algorithm>
#include <limits>
#include <string>
#include "base/bind.h"
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/ptr_util.h"
#include "base/metrics/histogram.h"
#include "base/numerics/safe_conversions.h"
#include "base/optional.h"
#include "base/sys_info.h"
#include "base/threading/thread_checker.h"
#include "base/trace_event/trace_event_argument.h"
#include "cc/base/devtools_instrumentation.h"
#include "cc/base/histograms.h"
#include "cc/layers/picture_layer_impl.h"
#include "cc/raster/playback_image_provider.h"
#include "cc/raster/raster_buffer.h"
#include "cc/raster/task_category.h"
#include "cc/resources/resource_util.h"
#include "cc/tiles/frame_viewer_instrumentation.h"
#include "cc/tiles/tile.h"
#include "ui/gfx/geometry/axis_transform2d.h"
#include "ui/gfx/geometry/rect_conversions.h"
namespace cc {
namespace {
// Flag to indicate whether we should try and detect that
// a tile is of solid color.
const bool kUseColorEstimator = true;
// TODO(enne): remove this histogram and its monitoring in M58 once there is
// enough new data from the other two raster task timers.
DEFINE_SCOPED_UMA_HISTOGRAM_AREA_TIMER(
ScopedGeneralRasterTaskTimer,
"Compositing.%s.RasterTask.RasterUs",
"Compositing.%s.RasterTask.RasterPixelsPerMs2");
DEFINE_SCOPED_UMA_HISTOGRAM_AREA_TIMER(
ScopedSoftwareRasterTaskTimer,
"Compositing.%s.RasterTask.RasterUs.Software",
"Compositing.%s.RasterTask.RasterPixelsPerMs2.Software");
DEFINE_SCOPED_UMA_HISTOGRAM_AREA_TIMER(
ScopedGpuRasterTaskTimer,
"Compositing.%s.RasterTask.RasterUs.Gpu",
"Compositing.%s.RasterTask.RasterPixelsPerMs2.Gpu");
class ScopedRasterTaskTimer {
public:
explicit ScopedRasterTaskTimer(bool use_gpu_rasterization) {
if (use_gpu_rasterization)
gpu_timer_.emplace();
else
software_timer_.emplace();
}
void SetArea(int area) {
general_timer_.SetArea(area);
if (software_timer_)
software_timer_->SetArea(area);
if (gpu_timer_)
gpu_timer_->SetArea(area);
}
private:
ScopedGeneralRasterTaskTimer general_timer_;
base::Optional<ScopedSoftwareRasterTaskTimer> software_timer_;
base::Optional<ScopedGpuRasterTaskTimer> gpu_timer_;
};
class RasterTaskImpl : public TileTask {
public:
RasterTaskImpl(TileManager* tile_manager,
Tile* tile,
ResourcePool::InUsePoolResource resource,
scoped_refptr<RasterSource> raster_source,
const RasterSource::PlaybackSettings& playback_settings,
TileResolution tile_resolution,
gfx::Rect invalidated_rect,
uint64_t source_prepare_tiles_id,
std::unique_ptr<RasterBuffer> raster_buffer,
TileTask::Vector* dependencies,
bool is_gpu_rasterization,
PlaybackImageProvider image_provider)
: TileTask(!is_gpu_rasterization, dependencies),
tile_manager_(tile_manager),
tile_id_(tile->id()),
resource_(std::move(resource)),
raster_source_(std::move(raster_source)),
content_rect_(tile->content_rect()),
invalid_content_rect_(invalidated_rect),
raster_transform_(tile->raster_transform()),
playback_settings_(playback_settings),
tile_resolution_(tile_resolution),
layer_id_(tile->layer_id()),
source_prepare_tiles_id_(source_prepare_tiles_id),
tile_tracing_id_(static_cast<void*>(tile)),
new_content_id_(tile->id()),
source_frame_number_(tile->source_frame_number()),
is_gpu_rasterization_(is_gpu_rasterization),
raster_buffer_(std::move(raster_buffer)),
image_provider_(std::move(image_provider)) {
DCHECK(origin_thread_checker_.CalledOnValidThread());
playback_settings_.image_provider = &image_provider_;
}
// Overridden from Task:
void RunOnWorkerThread() override {
TRACE_EVENT1("cc", "RasterizerTaskImpl::RunOnWorkerThread",
"source_prepare_tiles_id", source_prepare_tiles_id_);
DCHECK(raster_source_.get());
DCHECK(raster_buffer_);
frame_viewer_instrumentation::ScopedRasterTask raster_task(
tile_tracing_id_, tile_resolution_, source_frame_number_, layer_id_);
ScopedRasterTaskTimer timer(is_gpu_rasterization_);
timer.SetArea(content_rect_.size().GetArea());
DCHECK(raster_source_);
raster_buffer_->Playback(raster_source_.get(), content_rect_,
invalid_content_rect_, new_content_id_,
raster_transform_, playback_settings_);
}
// Overridden from TileTask:
void OnTaskCompleted() override {
DCHECK(origin_thread_checker_.CalledOnValidThread());
// Here calling state().IsCanceled() is thread-safe, because this task is
// already concluded as FINISHED or CANCELLED and no longer will be worked
// upon by task graph runner.
raster_buffer_ = nullptr;
tile_manager_->OnRasterTaskCompleted(tile_id_, std::move(resource_),
state().IsCanceled());
}
protected:
~RasterTaskImpl() override {
DCHECK(origin_thread_checker_.CalledOnValidThread());
DCHECK(!raster_buffer_);
DCHECK(!resource_);
}
private:
base::ThreadChecker origin_thread_checker_;
// The following members are needed for processing completion of this task on
// origin thread. These are not thread-safe and should be accessed only in
// origin thread. Ensure their access by checking CalledOnValidThread().
TileManager* tile_manager_;
Tile::Id tile_id_;
ResourcePool::InUsePoolResource resource_;
// The following members should be used for running the task.
scoped_refptr<RasterSource> raster_source_;
gfx::Rect content_rect_;
gfx::Rect invalid_content_rect_;
gfx::AxisTransform2d raster_transform_;
RasterSource::PlaybackSettings playback_settings_;
TileResolution tile_resolution_;
int layer_id_;
uint64_t source_prepare_tiles_id_;
void* tile_tracing_id_;
uint64_t new_content_id_;
int source_frame_number_;
bool is_gpu_rasterization_;
std::unique_ptr<RasterBuffer> raster_buffer_;
PlaybackImageProvider image_provider_;
DISALLOW_COPY_AND_ASSIGN(RasterTaskImpl);
};
TaskCategory TaskCategoryForTileTask(TileTask* task,
bool use_foreground_category) {
if (!task->supports_concurrent_execution())
return TASK_CATEGORY_NONCONCURRENT_FOREGROUND;
if (use_foreground_category)
return TASK_CATEGORY_FOREGROUND;
return TASK_CATEGORY_BACKGROUND;
}
bool IsForegroundCategory(uint16_t category) {
TaskCategory enum_category = static_cast<TaskCategory>(category);
switch (enum_category) {
case TASK_CATEGORY_NONCONCURRENT_FOREGROUND:
case TASK_CATEGORY_FOREGROUND:
return true;
case TASK_CATEGORY_BACKGROUND:
return false;
}
DCHECK(false);
return false;
}
// Task priorities that make sure that the task set done tasks run before any
// other remaining tasks.
const size_t kRequiredForActivationDoneTaskPriority = 1u;
const size_t kRequiredForDrawDoneTaskPriority = 2u;
const size_t kAllDoneTaskPriority = 3u;
// For correctness, |kTileTaskPriorityBase| must be greater than
// all task set done task priorities.
size_t kTileTaskPriorityBase = 10u;
void InsertNodeForTask(TaskGraph* graph,
TileTask* task,
uint16_t category,
uint16_t priority,
size_t dependencies) {
DCHECK(std::find_if(graph->nodes.begin(), graph->nodes.end(),
[&task](const TaskGraph::Node& node) {
return node.task == task;
}) == graph->nodes.end());
graph->nodes.emplace_back(task, category, priority, dependencies);
}
void InsertNodeForDecodeTask(TaskGraph* graph,
TileTask* task,
bool use_foreground_category,
uint16_t priority) {
uint32_t dependency_count = 0u;
if (task->dependencies().size()) {
DCHECK_EQ(task->dependencies().size(), 1u);
auto* dependency = task->dependencies()[0].get();
if (!dependency->HasCompleted()) {
InsertNodeForDecodeTask(graph, dependency, use_foreground_category,
priority);
graph->edges.emplace_back(dependency, task);
dependency_count = 1u;
}
}
InsertNodeForTask(graph, task,
TaskCategoryForTileTask(task, use_foreground_category),
priority, dependency_count);
}
void InsertNodesForRasterTask(TaskGraph* graph,
TileTask* raster_task,
const TileTask::Vector& decode_tasks,
size_t priority,
bool use_foreground_category) {
size_t dependencies = 0u;
// Insert image decode tasks.
for (TileTask::Vector::const_iterator it = decode_tasks.begin();
it != decode_tasks.end(); ++it) {
TileTask* decode_task = it->get();
// Skip if already decoded.
if (decode_task->HasCompleted())
continue;
dependencies++;
// Add decode task if it doesn't already exist in graph.
TaskGraph::Node::Vector::iterator decode_it =
std::find_if(graph->nodes.begin(), graph->nodes.end(),
[decode_task](const TaskGraph::Node& node) {
return node.task == decode_task;
});
// In rare circumstances, a background category task may come in before a
// foreground category task. In these cases, upgrade any background category
// dependencies of the current task.
// TODO(ericrk): Task iterators should be updated to avoid this.
// crbug.com/594851
// TODO(ericrk): This should handle dependencies recursively.
// crbug.com/605234
if (decode_it != graph->nodes.end() && use_foreground_category &&
!IsForegroundCategory(decode_it->category)) {
decode_it->category = TASK_CATEGORY_FOREGROUND;
}
if (decode_it == graph->nodes.end()) {
InsertNodeForDecodeTask(graph, decode_task, use_foreground_category,
priority);
}
graph->edges.emplace_back(decode_task, raster_task);
}
InsertNodeForTask(
graph, raster_task,
TaskCategoryForTileTask(raster_task, use_foreground_category), priority,
dependencies);
}
class TaskSetFinishedTaskImpl : public TileTask {
public:
explicit TaskSetFinishedTaskImpl(
base::SequencedTaskRunner* task_runner,
const base::Closure& on_task_set_finished_callback)
: TileTask(true),
task_runner_(task_runner),
on_task_set_finished_callback_(on_task_set_finished_callback) {}
// Overridden from Task:
void RunOnWorkerThread() override {
TRACE_EVENT0("cc", "TaskSetFinishedTaskImpl::RunOnWorkerThread");
TaskSetFinished();
}
// Overridden from TileTask:
void OnTaskCompleted() override {}
protected:
~TaskSetFinishedTaskImpl() override = default;
void TaskSetFinished() {
task_runner_->PostTask(FROM_HERE, on_task_set_finished_callback_);
}
private:
base::SequencedTaskRunner* task_runner_;
const base::Closure on_task_set_finished_callback_;
DISALLOW_COPY_AND_ASSIGN(TaskSetFinishedTaskImpl);
};
} // namespace
RasterTaskCompletionStats::RasterTaskCompletionStats()
: completed_count(0u), canceled_count(0u) {}
std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
RasterTaskCompletionStatsAsValue(const RasterTaskCompletionStats& stats) {
std::unique_ptr<base::trace_event::TracedValue> state(
new base::trace_event::TracedValue());
state->SetInteger("completed_count",
base::saturated_cast<int>(stats.completed_count));
state->SetInteger("canceled_count",
base::saturated_cast<int>(stats.canceled_count));
return std::move(state);
}
TileManager::TileManager(
TileManagerClient* client,
base::SequencedTaskRunner* origin_task_runner,
scoped_refptr<base::SequencedTaskRunner> image_worker_task_runner,
size_t scheduled_raster_task_limit,
const TileManagerSettings& tile_manager_settings)
: client_(client),
task_runner_(origin_task_runner),
resource_pool_(nullptr),
tile_task_manager_(nullptr),
scheduled_raster_task_limit_(scheduled_raster_task_limit),
tile_manager_settings_(tile_manager_settings),
use_gpu_rasterization_(false),
all_tiles_that_need_to_be_rasterized_are_scheduled_(true),
did_check_for_completed_tasks_since_last_schedule_tasks_(true),
did_oom_on_last_assign_(false),
image_controller_(origin_task_runner,
std::move(image_worker_task_runner)),
checker_image_tracker_(&image_controller_,
this,
tile_manager_settings_.enable_checker_imaging,
tile_manager_settings_.min_image_bytes_to_checker),
more_tiles_need_prepare_check_notifier_(
task_runner_,
base::Bind(&TileManager::CheckIfMoreTilesNeedToBePrepared,
base::Unretained(this))),
signals_check_notifier_(task_runner_,
base::Bind(&TileManager::CheckAndIssueSignals,
base::Unretained(this))),
has_scheduled_tile_tasks_(false),
prepare_tiles_count_(0u),
next_tile_id_(0u),
task_set_finished_weak_ptr_factory_(this),
ready_to_draw_callback_weak_ptr_factory_(this) {}
TileManager::~TileManager() {
FinishTasksAndCleanUp();
}
void TileManager::FinishTasksAndCleanUp() {
if (!tile_task_manager_)
return;
global_state_ = GlobalStateThatImpactsTilePriority();
// This cancels tasks if possible, finishes pending tasks, and release any
// uninitialized resources.
tile_task_manager_->Shutdown();
raster_buffer_provider_->Shutdown();
tile_task_manager_->CheckForCompletedTasks();
tile_task_manager_ = nullptr;
resource_pool_ = nullptr;
more_tiles_need_prepare_check_notifier_.Cancel();
signals_check_notifier_.Cancel();
task_set_finished_weak_ptr_factory_.InvalidateWeakPtrs();
ready_to_draw_callback_weak_ptr_factory_.InvalidateWeakPtrs();
raster_buffer_provider_ = nullptr;
// Ask the tracker to drop any locked decodes since we will be destroying the
// decode cache.
bool can_clear_decode_policy_tracking = false;
checker_image_tracker_.ClearTracker(can_clear_decode_policy_tracking);
image_controller_.SetImageDecodeCache(nullptr);
locked_image_tasks_.clear();
}
void TileManager::SetResources(ResourcePool* resource_pool,
ImageDecodeCache* image_decode_cache,
TaskGraphRunner* task_graph_runner,
RasterBufferProvider* raster_buffer_provider,
size_t scheduled_raster_task_limit,
bool use_gpu_rasterization) {
DCHECK(!tile_task_manager_);
DCHECK(task_graph_runner);
use_gpu_rasterization_ = use_gpu_rasterization;
scheduled_raster_task_limit_ = scheduled_raster_task_limit;
resource_pool_ = resource_pool;
image_controller_.SetImageDecodeCache(image_decode_cache);
tile_task_manager_ = TileTaskManagerImpl::Create(task_graph_runner);
raster_buffer_provider_ = raster_buffer_provider;
}
void TileManager::Release(Tile* tile) {
if (tile->raster_task_scheduled_with_checker_images())
num_of_tiles_with_checker_images_--;
DCHECK_GE(num_of_tiles_with_checker_images_, 0);
FreeResourcesForTile(tile);
tiles_.erase(tile->id());
}
void TileManager::DidFinishRunningTileTasksRequiredForActivation() {
TRACE_EVENT0("cc",
"TileManager::DidFinishRunningTileTasksRequiredForActivation");
TRACE_EVENT_ASYNC_STEP_INTO1("cc", "ScheduledTasks", this, "running", "state",
ScheduledTasksStateAsValue());
// TODO(vmpstr): Temporary check to debug crbug.com/642927.
CHECK(tile_task_manager_);
signals_.ready_to_activate = true;
signals_check_notifier_.Schedule();
}
void TileManager::DidFinishRunningTileTasksRequiredForDraw() {
TRACE_EVENT0("cc", "TileManager::DidFinishRunningTileTasksRequiredForDraw");
TRACE_EVENT_ASYNC_STEP_INTO1("cc", "ScheduledTasks", this, "running", "state",
ScheduledTasksStateAsValue());
// TODO(vmpstr): Temporary check to debug crbug.com/642927.
CHECK(tile_task_manager_);
signals_.ready_to_draw = true;
signals_check_notifier_.Schedule();
}
void TileManager::DidFinishRunningAllTileTasks() {
TRACE_EVENT0("cc", "TileManager::DidFinishRunningAllTileTasks");
TRACE_EVENT_ASYNC_END0("cc", "ScheduledTasks", this);
DCHECK(resource_pool_);
DCHECK(tile_task_manager_);
has_scheduled_tile_tasks_ = false;
if (all_tiles_that_need_to_be_rasterized_are_scheduled_ &&
!resource_pool_->ResourceUsageTooHigh()) {
// TODO(ericrk): We should find a better way to safely handle re-entrant
// notifications than always having to schedule a new task.
// http://crbug.com/498439
// TODO(vmpstr): Temporary check to debug crbug.com/642927.
CHECK(tile_task_manager_);
signals_.all_tile_tasks_completed = true;
signals_check_notifier_.Schedule();
return;
}
more_tiles_need_prepare_check_notifier_.Schedule();
}
bool TileManager::PrepareTiles(
const GlobalStateThatImpactsTilePriority& state) {
++prepare_tiles_count_;
TRACE_EVENT1("cc", "TileManager::PrepareTiles", "prepare_tiles_id",
prepare_tiles_count_);
if (!tile_task_manager_) {
TRACE_EVENT_INSTANT0("cc", "PrepareTiles aborted",
TRACE_EVENT_SCOPE_THREAD);
return false;
}
signals_.reset();
global_state_ = state;
// Ensure that we don't schedule any decode work for checkered images until
// the raster work for visible tiles is complete. This is done in
// CheckAndIssueSignals when the ready to activate/draw signals are dispatched
// to the client.
checker_image_tracker_.SetNoDecodesAllowed();
// We need to call CheckForCompletedTasks() once in-between each call
// to ScheduleTasks() to prevent canceled tasks from being scheduled.
if (!did_check_for_completed_tasks_since_last_schedule_tasks_) {
tile_task_manager_->CheckForCompletedTasks();
did_check_for_completed_tasks_since_last_schedule_tasks_ = true;
}
PrioritizedWorkToSchedule prioritized_work = AssignGpuMemoryToTiles();
// Inform the client that will likely require a draw if the highest priority
// tile that will be rasterized is required for draw.
client_->SetIsLikelyToRequireADraw(
!prioritized_work.tiles_to_raster.empty() &&
prioritized_work.tiles_to_raster.front().tile()->required_for_draw());
// Schedule tile tasks.
ScheduleTasks(std::move(prioritized_work));
TRACE_EVENT_INSTANT1("cc", "DidPrepareTiles", TRACE_EVENT_SCOPE_THREAD,
"state", BasicStateAsValue());
return true;
}
void TileManager::CheckForCompletedTasks() {
TRACE_EVENT0("cc", "TileManager::CheckForCompletedTasks");
if (!tile_task_manager_) {
TRACE_EVENT_INSTANT0("cc", "TileManager::CheckForCompletedTasksAborted",
TRACE_EVENT_SCOPE_THREAD);
return;
}
tile_task_manager_->CheckForCompletedTasks();
did_check_for_completed_tasks_since_last_schedule_tasks_ = true;
CheckPendingGpuWorkTiles(true /* issue_signals */, false /* flush */);
TRACE_EVENT_INSTANT1(
"cc", "TileManager::CheckForCompletedTasksFinished",
TRACE_EVENT_SCOPE_THREAD, "stats",
RasterTaskCompletionStatsAsValue(raster_task_completion_stats_));
raster_task_completion_stats_ = RasterTaskCompletionStats();
}
void TileManager::DidModifyTilePriorities() {
pending_tile_requirements_dirty_ = true;
}
std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
TileManager::BasicStateAsValue() const {
std::unique_ptr<base::trace_event::TracedValue> value(
new base::trace_event::TracedValue());
BasicStateAsValueInto(value.get());
return std::move(value);
}
void TileManager::BasicStateAsValueInto(
base::trace_event::TracedValue* state) const {
state->SetInteger("tile_count", base::saturated_cast<int>(tiles_.size()));
state->SetBoolean("did_oom_on_last_assign", did_oom_on_last_assign_);
state->BeginDictionary("global_state");
global_state_.AsValueInto(state);
state->EndDictionary();
}
std::unique_ptr<EvictionTilePriorityQueue>
TileManager::FreeTileResourcesUntilUsageIsWithinLimit(
std::unique_ptr<EvictionTilePriorityQueue> eviction_priority_queue,
const MemoryUsage& limit,
MemoryUsage* usage) {
while (usage->Exceeds(limit)) {
if (!eviction_priority_queue) {
eviction_priority_queue =
client_->BuildEvictionQueue(global_state_.tree_priority);
}
if (eviction_priority_queue->IsEmpty())
break;
Tile* tile = eviction_priority_queue->Top().tile();
*usage -= MemoryUsage::FromTile(tile);
FreeResourcesForTileAndNotifyClientIfTileWasReadyToDraw(tile);
eviction_priority_queue->Pop();
}
return eviction_priority_queue;
}
std::unique_ptr<EvictionTilePriorityQueue>
TileManager::FreeTileResourcesWithLowerPriorityUntilUsageIsWithinLimit(
std::unique_ptr<EvictionTilePriorityQueue> eviction_priority_queue,
const MemoryUsage& limit,
const TilePriority& other_priority,
MemoryUsage* usage) {
while (usage->Exceeds(limit)) {
if (!eviction_priority_queue) {
eviction_priority_queue =
client_->BuildEvictionQueue(global_state_.tree_priority);
}
if (eviction_priority_queue->IsEmpty())
break;
const PrioritizedTile& prioritized_tile = eviction_priority_queue->Top();
if (!other_priority.IsHigherPriorityThan(prioritized_tile.priority()))
break;
Tile* tile = prioritized_tile.tile();
*usage -= MemoryUsage::FromTile(tile);
FreeResourcesForTileAndNotifyClientIfTileWasReadyToDraw(tile);
eviction_priority_queue->Pop();
}
return eviction_priority_queue;
}
bool TileManager::TilePriorityViolatesMemoryPolicy(
const TilePriority& priority) {
switch (global_state_.memory_limit_policy) {
case ALLOW_NOTHING:
return true;
case ALLOW_ABSOLUTE_MINIMUM:
return priority.priority_bin > TilePriority::NOW;
case ALLOW_PREPAINT_ONLY:
return priority.priority_bin > TilePriority::SOON;
case ALLOW_ANYTHING:
return priority.distance_to_visible ==
std::numeric_limits<float>::infinity();
}
NOTREACHED();
return true;
}
TileManager::PrioritizedWorkToSchedule TileManager::AssignGpuMemoryToTiles() {
TRACE_EVENT_BEGIN0("cc", "TileManager::AssignGpuMemoryToTiles");
DCHECK(resource_pool_);
DCHECK(tile_task_manager_);
// Maintain the list of released resources that can potentially be re-used
// or deleted. If this operation becomes expensive too, only do this after
// some resource(s) was returned. Note that in that case, one also need to
// invalidate when releasing some resource from the pool.
resource_pool_->CheckBusyResources();
// Now give memory out to the tiles until we're out, and build
// the needs-to-be-rasterized queue.
unsigned schedule_priority = 1u;
all_tiles_that_need_to_be_rasterized_are_scheduled_ = true;
bool had_enough_memory_to_schedule_tiles_needed_now = true;
MemoryUsage hard_memory_limit(global_state_.hard_memory_limit_in_bytes,
global_state_.num_resources_limit);
MemoryUsage soft_memory_limit(global_state_.soft_memory_limit_in_bytes,
global_state_.num_resources_limit);
MemoryUsage memory_usage(resource_pool_->memory_usage_bytes(),
resource_pool_->resource_count());
gfx::ColorSpace raster_color_space = client_->GetRasterColorSpace();
std::unique_ptr<RasterTilePriorityQueue> raster_priority_queue(
client_->BuildRasterQueue(global_state_.tree_priority,
RasterTilePriorityQueue::Type::ALL));
std::unique_ptr<EvictionTilePriorityQueue> eviction_priority_queue;
PrioritizedWorkToSchedule work_to_schedule;
for (; !raster_priority_queue->IsEmpty(); raster_priority_queue->Pop()) {
const PrioritizedTile& prioritized_tile = raster_priority_queue->Top();
Tile* tile = prioritized_tile.tile();
TilePriority priority = prioritized_tile.priority();
if (TilePriorityViolatesMemoryPolicy(priority)) {
TRACE_EVENT_INSTANT0(
"cc", "TileManager::AssignGpuMemory tile violates memory policy",
TRACE_EVENT_SCOPE_THREAD);
break;
}
bool tile_is_needed_now = priority.priority_bin == TilePriority::NOW;
if (!tile->is_solid_color_analysis_performed() &&
tile->use_picture_analysis() && kUseColorEstimator) {
// We analyze for solid color here, to decide to continue
// or drop the tile for scheduling and raster.
// TODO(sohanjg): Check if we could use a shared analysis
// canvas which is reset between tiles.
tile->set_solid_color_analysis_performed(true);
SkColor color = SK_ColorTRANSPARENT;
bool is_solid_color =
prioritized_tile.raster_source()->PerformSolidColorAnalysis(
tile->enclosing_layer_rect(), &color);
if (is_solid_color) {
tile->draw_info().set_solid_color(color);
client_->NotifyTileStateChanged(tile);
continue;
}
}
// Prepaint tiles that are far away are only processed for images.
if (tile->is_prepaint() && prioritized_tile.is_process_for_images_only()) {
work_to_schedule.tiles_to_process_for_images.push_back(prioritized_tile);
continue;
}
// Tiles in the raster queue should either require raster or decode for
// checker-images. If this tile does not need raster, process it only to
// build the decode queue for checkered images.
// Note that performing this check after the solid color analysis is not
// necessary for correctness.
if (!tile->draw_info().NeedsRaster()) {
DCHECK(tile->draw_info().is_checker_imaged());
DCHECK(prioritized_tile.should_decode_checkered_images_for_tile());
AddCheckeredImagesToDecodeQueue(
prioritized_tile, raster_color_space,
CheckerImageTracker::DecodeType::kRaster,
&work_to_schedule.checker_image_decode_queue);
continue;
}
// We won't be able to schedule this tile, so break out early.
if (work_to_schedule.tiles_to_raster.size() >=
scheduled_raster_task_limit_) {
all_tiles_that_need_to_be_rasterized_are_scheduled_ = false;
break;
}
DCHECK(tile->draw_info().mode() == TileDrawInfo::OOM_MODE ||
!tile->draw_info().IsReadyToDraw());
// If the tile already has a raster_task, then the memory used by it is
// already accounted for in memory_usage. Otherwise, we'll have to acquire
// more memory to create a raster task.
MemoryUsage memory_required_by_tile_to_be_scheduled;
if (!tile->raster_task_.get()) {
memory_required_by_tile_to_be_scheduled = MemoryUsage::FromConfig(
tile->desired_texture_size(), DetermineResourceFormat(tile));
}
// This is the memory limit that will be used by this tile. Depending on
// the tile priority, it will be one of hard_memory_limit or
// soft_memory_limit.
MemoryUsage& tile_memory_limit =
tile_is_needed_now ? hard_memory_limit : soft_memory_limit;
const MemoryUsage& scheduled_tile_memory_limit =
tile_memory_limit - memory_required_by_tile_to_be_scheduled;
eviction_priority_queue =
FreeTileResourcesWithLowerPriorityUntilUsageIsWithinLimit(
std::move(eviction_priority_queue), scheduled_tile_memory_limit,
priority, &memory_usage);
bool memory_usage_is_within_limit =
!memory_usage.Exceeds(scheduled_tile_memory_limit);
// If we couldn't fit the tile into our current memory limit, then we're
// done.
if (!memory_usage_is_within_limit) {
if (tile_is_needed_now)
had_enough_memory_to_schedule_tiles_needed_now = false;
all_tiles_that_need_to_be_rasterized_are_scheduled_ = false;
break;
}
// If the tile has a scheduled task that will rasterize a resource with
// checker-imaged content, add those images to the decode queue. Note that
// we add all images as we process the raster priority queue to ensure that
// images are added to the decode queue in raster priority order.
if (tile->HasRasterTask()) {
if (tile->raster_task_scheduled_with_checker_images() &&
prioritized_tile.should_decode_checkered_images_for_tile()) {
AddCheckeredImagesToDecodeQueue(
prioritized_tile, raster_color_space,
CheckerImageTracker::DecodeType::kRaster,
&work_to_schedule.checker_image_decode_queue);
}
} else {
// Creating the raster task here will acquire resources, but
// this resource usage has already been accounted for above.
auto raster_task = CreateRasterTask(
prioritized_tile, client_->GetRasterColorSpace(), &work_to_schedule);
if (!raster_task) {
continue;
}
tile->raster_task_ = std::move(raster_task);
}
tile->scheduled_priority_ = schedule_priority++;
memory_usage += memory_required_by_tile_to_be_scheduled;
work_to_schedule.tiles_to_raster.push_back(prioritized_tile);
}
// Note that we should try and further reduce memory in case the above loop
// didn't reduce memory. This ensures that we always release as many resources
// as possible to stay within the memory limit.
eviction_priority_queue = FreeTileResourcesUntilUsageIsWithinLimit(
std::move(eviction_priority_queue), hard_memory_limit, &memory_usage);
// At this point, if we ran out of memory when allocating resources and we
// couldn't go past even the NOW bin, this means we have evicted resources
// from all tiles with a lower priority while we still might have resources
// holding checker-imaged content. The invalidations for these resources will
// be generated only if the skipped images are decoded. So we must schedule
// decodes for these tiles to update their content.
if (!had_enough_memory_to_schedule_tiles_needed_now &&
num_of_tiles_with_checker_images_ > 0) {
for (; !raster_priority_queue->IsEmpty(); raster_priority_queue->Pop()) {
const PrioritizedTile& prioritized_tile = raster_priority_queue->Top();
if (prioritized_tile.priority().priority_bin > TilePriority::NOW)
break;
if (!prioritized_tile.should_decode_checkered_images_for_tile())
continue;
Tile* tile = prioritized_tile.tile();
if (tile->draw_info().is_checker_imaged() ||
tile->raster_task_scheduled_with_checker_images()) {
AddCheckeredImagesToDecodeQueue(
prioritized_tile, raster_color_space,
CheckerImageTracker::DecodeType::kRaster,
&work_to_schedule.checker_image_decode_queue);
}
}
}
// The hard_limit for low-end devices is 8MB, so we set the max_value for the
// histogram to be 8200KB.
if (had_enough_memory_to_schedule_tiles_needed_now &&
base::SysInfo::AmountOfPhysicalMemoryMB() <= 512) {
int64_t tiles_gpu_memory_kb = memory_usage.memory_bytes() / 1024;
UMA_HISTOGRAM_CUSTOM_COUNTS("TileManager.TilesGPUMemoryUsage",
tiles_gpu_memory_kb, 1, 8200, 100);
}
UMA_HISTOGRAM_BOOLEAN("TileManager.ExceededMemoryBudget",
!had_enough_memory_to_schedule_tiles_needed_now);
did_oom_on_last_assign_ = !had_enough_memory_to_schedule_tiles_needed_now;
memory_stats_from_last_assign_.total_budget_in_bytes =
global_state_.hard_memory_limit_in_bytes;
memory_stats_from_last_assign_.total_bytes_used = memory_usage.memory_bytes();
DCHECK_GE(memory_stats_from_last_assign_.total_bytes_used, 0);
memory_stats_from_last_assign_.had_enough_memory =
had_enough_memory_to_schedule_tiles_needed_now;
TRACE_EVENT_END2("cc", "TileManager::AssignGpuMemoryToTiles",
"all_tiles_that_need_to_be_rasterized_are_scheduled",
all_tiles_that_need_to_be_rasterized_are_scheduled_,
"had_enough_memory_to_schedule_tiles_needed_now",
had_enough_memory_to_schedule_tiles_needed_now);
return work_to_schedule;
}
void TileManager::FreeResourcesForTile(Tile* tile) {
TileDrawInfo& draw_info = tile->draw_info();
if (draw_info.is_checker_imaged())
num_of_tiles_with_checker_images_--;
DCHECK_GE(num_of_tiles_with_checker_images_, 0);
if (draw_info.has_resource()) {
resource_pool_->ReleaseResource(draw_info.TakeResource());
pending_gpu_work_tiles_.erase(tile);
}
}
void TileManager::FreeResourcesForTileAndNotifyClientIfTileWasReadyToDraw(
Tile* tile) {
bool was_ready_to_draw = tile->draw_info().IsReadyToDraw();
FreeResourcesForTile(tile);
if (was_ready_to_draw)
client_->NotifyTileStateChanged(tile);
}
void TileManager::PartitionImagesForCheckering(
const PrioritizedTile& prioritized_tile,
const gfx::ColorSpace& raster_color_space,
std::vector<DrawImage>* sync_decoded_images,
std::vector<PaintImage>* checkered_images,
const gfx::Rect* invalidated_rect,
base::flat_map<PaintImage::Id, size_t>* image_to_frame_index) {
Tile* tile = prioritized_tile.tile();
std::vector<const DrawImage*> images_in_tile;
gfx::Rect enclosing_rect = tile->enclosing_layer_rect();
if (invalidated_rect) {
enclosing_rect = ToEnclosingRect(
tile->raster_transform().InverseMapRect(gfx::RectF(*invalidated_rect)));
}
prioritized_tile.raster_source()->GetDiscardableImagesInRect(enclosing_rect,
&images_in_tile);
WhichTree tree = tile->tiling()->tree();
for (const auto* original_draw_image : images_in_tile) {
size_t frame_index = original_draw_image->paint_image().frame_index();
if (tile_manager_settings_.enable_image_animations) {
const auto& image = original_draw_image->paint_image();
frame_index = client_->GetFrameIndexForImage(image, tree);
if (image_to_frame_index) {
(*image_to_frame_index)[image.stable_id()] = frame_index;
}
}
DrawImage draw_image(*original_draw_image, tile->raster_transform().scale(),
frame_index, raster_color_space);
if (checker_image_tracker_.ShouldCheckerImage(draw_image, tree))
checkered_images->push_back(draw_image.paint_image());
else
sync_decoded_images->push_back(std::move(draw_image));
}
}
void TileManager::AddCheckeredImagesToDecodeQueue(
const PrioritizedTile& prioritized_tile,
const gfx::ColorSpace& raster_color_space,
CheckerImageTracker::DecodeType decode_type,
CheckerImageTracker::ImageDecodeQueue* image_decode_queue) {
Tile* tile = prioritized_tile.tile();
std::vector<const DrawImage*> images_in_tile;
prioritized_tile.raster_source()->GetDiscardableImagesInRect(
tile->enclosing_layer_rect(), &images_in_tile);
WhichTree tree = tile->tiling()->tree();
for (const auto* original_draw_image : images_in_tile) {
size_t frame_index = original_draw_image->paint_image().frame_index();
if (tile_manager_settings_.enable_image_animations) {
frame_index = client_->GetFrameIndexForImage(
original_draw_image->paint_image(), tree);
}
DrawImage draw_image(*original_draw_image, tile->raster_transform().scale(),
frame_index, raster_color_space);
if (checker_image_tracker_.ShouldCheckerImage(draw_image, tree)) {
image_decode_queue->emplace_back(draw_image.paint_image(), decode_type);
}
}
}
void TileManager::ScheduleTasks(PrioritizedWorkToSchedule work_to_schedule) {
const std::vector<PrioritizedTile>& tiles_that_need_to_be_rasterized =
work_to_schedule.tiles_to_raster;
TRACE_EVENT1("cc", "TileManager::ScheduleTasks", "count",
tiles_that_need_to_be_rasterized.size());
DCHECK(did_check_for_completed_tasks_since_last_schedule_tasks_);
if (!has_scheduled_tile_tasks_) {
TRACE_EVENT_ASYNC_BEGIN0("cc", "ScheduledTasks", this);
}
// Cancel existing OnTaskSetFinished callbacks.
task_set_finished_weak_ptr_factory_.InvalidateWeakPtrs();
// Even when scheduling an empty set of tiles, the TTWP does some work, and
// will always trigger a DidFinishRunningTileTasks notification. Because of
// this we unconditionally set |has_scheduled_tile_tasks_| to true.
has_scheduled_tile_tasks_ = true;
// Track the number of dependents for each *_done task.
size_t required_for_activate_count = 0;
size_t required_for_draw_count = 0;
size_t all_count = 0;
size_t priority = kTileTaskPriorityBase;
graph_.Reset();
gfx::ColorSpace raster_color_space = client_->GetRasterColorSpace();
scoped_refptr<TileTask> required_for_activation_done_task =
CreateTaskSetFinishedTask(
&TileManager::DidFinishRunningTileTasksRequiredForActivation);
scoped_refptr<TileTask> required_for_draw_done_task =
CreateTaskSetFinishedTask(
&TileManager::DidFinishRunningTileTasksRequiredForDraw);
scoped_refptr<TileTask> all_done_task =
CreateTaskSetFinishedTask(&TileManager::DidFinishRunningAllTileTasks);
// Build a new task queue containing all task currently needed. Tasks
// are added in order of priority, highest priority task first.
for (auto& prioritized_tile : tiles_that_need_to_be_rasterized) {
Tile* tile = prioritized_tile.tile();
DCHECK(tile->draw_info().requires_resource());
DCHECK(!tile->draw_info().has_resource());
DCHECK(tile->HasRasterTask());
TileTask* task = tile->raster_task_.get();
DCHECK(!task->HasCompleted());
if (tile->required_for_activation()) {
required_for_activate_count++;