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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_SCOPED_RASTER_TIMER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_SCOPED_RASTER_TIMER_H_
#include <optional>
#include "base/timer/elapsed_timer.h"
#include "gpu/command_buffer/client/raster_interface.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class PLATFORM_EXPORT ScopedRasterTimer {
STACK_ALLOCATED();
public:
class Host;
// raster_interface: pass null if rasterization is not gpu-accelerated
ScopedRasterTimer(gpu::raster::RasterInterface* raster_interface,
Host& host,
bool always_measure_for_testing);
~ScopedRasterTimer();
// Histogram names.
static constexpr const char* const kRasterDurationUnacceleratedHistogram =
"Blink.Canvas.RasterDuration.Unaccelerated";
static constexpr const char* const kRasterDurationAcceleratedCpuHistogram =
"Blink.Canvas.RasterDuration.Accelerated.CPU";
static constexpr const char* const kRasterDurationAcceleratedGpuHistogram =
"Blink.Canvas.RasterDuration.Accelerated.GPU";
static constexpr const char* const kRasterDurationAcceleratedTotalHistogram =
"Blink.Canvas.RasterDuration.Accelerated.Total";
private:
class AsyncGpuRasterTimer {
public:
// At construction time: starts tracking commands issued to the gpu
// interface.
explicit AsyncGpuRasterTimer(
gpu::raster::RasterInterface& raster_interface);
// Stop tracking issue command
void FinishedIssuingCommands(gpu::raster::RasterInterface& raster_interface,
base::TimeDelta cpu_raster_duration);
// Returns true if the timer is done (i.e. all commands issued before
// call to FinishedIssuingCommands have been executed and timed on the
// service side). Must wait for this method to return true before
// destroying `this`, otherwise the measurement will be lost.
bool CheckTimer(gpu::raster::RasterInterface& raster_interface);
~AsyncGpuRasterTimer() = default;
private:
GLuint done_ = 0;
GLuint gl_query_id_ = 0u;
base::TimeDelta cpu_raster_duration_;
};
public:
// Classes with methods that use ScopedRasterTimer must inherit
// ScopedRasterTimer::Host
class Host {
public:
void CheckGpuTimers(gpu::raster::RasterInterface* raster_interface);
void AddGpuTimer(std::unique_ptr<AsyncGpuRasterTimer>);
private:
WTF::Vector<std::unique_ptr<AsyncGpuRasterTimer>> gpu_timers_;
};
private:
bool active_ = false;
// Optional. nullptr indicates that raster work load is not GPU accelerated.
gpu::raster::RasterInterface* const raster_interface_;
std::optional<base::ElapsedTimer> timer_;
std::unique_ptr<AsyncGpuRasterTimer> gpu_timer_;
Host& host_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_SCOPED_RASTER_TIMER_H_
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