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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/command_buffer/service/dawn_platform.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_functions.h"
#include "base/synchronization/waitable_event.h"
#include "base/task/thread_pool.h"
#include "base/time/time.h"
#include "base/trace_event/trace_arguments.h"
#include "base/trace_event/trace_event.h"
#include "gpu/command_buffer/service/dawn_caching_interface.h"
#include "gpu/config/gpu_finch_features.h"
namespace gpu::webgpu {
namespace {
class AsyncWaitableEventImpl
: public base::RefCountedThreadSafe<AsyncWaitableEventImpl> {
public:
explicit AsyncWaitableEventImpl()
: waitable_event_(base::WaitableEvent::ResetPolicy::MANUAL,
base::WaitableEvent::InitialState::NOT_SIGNALED) {}
void Wait() { waitable_event_.Wait(); }
bool IsComplete() { return waitable_event_.IsSignaled(); }
void MarkAsComplete() { waitable_event_.Signal(); }
private:
friend class base::RefCountedThreadSafe<AsyncWaitableEventImpl>;
~AsyncWaitableEventImpl() = default;
base::WaitableEvent waitable_event_;
};
class AsyncWaitableEvent : public dawn::platform::WaitableEvent {
public:
explicit AsyncWaitableEvent()
: waitable_event_impl_(base::MakeRefCounted<AsyncWaitableEventImpl>()) {}
void Wait() override { waitable_event_impl_->Wait(); }
bool IsComplete() override { return waitable_event_impl_->IsComplete(); }
scoped_refptr<AsyncWaitableEventImpl> GetWaitableEventImpl() const {
return waitable_event_impl_;
}
private:
scoped_refptr<AsyncWaitableEventImpl> waitable_event_impl_;
};
class AsyncWorkerTaskPool : public dawn::platform::WorkerTaskPool {
public:
std::unique_ptr<dawn::platform::WaitableEvent> PostWorkerTask(
dawn::platform::PostWorkerTaskCallback callback,
void* user_data) override {
std::unique_ptr<AsyncWaitableEvent> waitable_event =
std::make_unique<AsyncWaitableEvent>();
base::ThreadPool::PostTask(
FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_VISIBLE},
base::BindOnce(&RunWorkerTask, callback, user_data,
waitable_event->GetWaitableEventImpl()));
return waitable_event;
}
private:
static void RunWorkerTask(
dawn::platform::PostWorkerTaskCallback callback,
void* user_data,
scoped_refptr<AsyncWaitableEventImpl> waitable_event_impl) {
TRACE_EVENT0("toplevel", "DawnPlatformImpl::RunWorkerTask");
callback(user_data);
waitable_event_impl->MarkAsComplete();
}
};
} // anonymous namespace
DawnPlatform::DawnPlatform(
std::unique_ptr<DawnCachingInterface> dawn_caching_interface,
const char* uma_prefix)
: dawn_caching_interface_(std::move(dawn_caching_interface)),
uma_prefix_(uma_prefix) {}
DawnPlatform::~DawnPlatform() = default;
const unsigned char* DawnPlatform::GetTraceCategoryEnabledFlag(
dawn::platform::TraceCategory category) {
// For now, all Dawn trace categories are put under "gpu.dawn"
return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(
TRACE_DISABLED_BY_DEFAULT("gpu.dawn"));
}
double DawnPlatform::MonotonicallyIncreasingTime() {
return (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF();
}
uint64_t DawnPlatform::AddTraceEvent(
char phase,
const unsigned char* category_group_enabled,
const char* name,
uint64_t id,
double timestamp,
int num_args,
const char** arg_names,
const unsigned char* arg_types,
const uint64_t* arg_values,
unsigned char flags) {
base::TimeTicks timestamp_tt = base::TimeTicks() + base::Seconds(timestamp);
base::trace_event::TraceArguments args(
num_args, arg_names, arg_types,
reinterpret_cast<const unsigned long long*>(arg_values));
base::trace_event::TraceEventHandle handle =
TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
phase, category_group_enabled, name,
trace_event_internal::kGlobalScope, id, trace_event_internal::kNoId,
base::PlatformThread::CurrentId(), timestamp_tt, &args, flags);
uint64_t result = 0;
static_assert(sizeof(base::trace_event::TraceEventHandle) <= sizeof(result),
"TraceEventHandle must be at most the size of uint64_t");
static_assert(std::is_pod<base::trace_event::TraceEventHandle>(),
"TraceEventHandle must be memcpy'able");
memcpy(&result, &handle, sizeof(base::trace_event::TraceEventHandle));
return result;
}
void DawnPlatform::HistogramCustomCounts(const char* name,
int sample,
int min,
int max,
int bucketCount) {
base::UmaHistogramCustomCounts(uma_prefix_ + name, sample, min, max,
bucketCount);
}
void DawnPlatform::HistogramCustomCountsHPC(const char* name,
int sample,
int min,
int max,
int bucketCount) {
if (base::TimeTicks::IsHighResolution()) {
base::UmaHistogramCustomCounts(uma_prefix_ + name, sample, min, max,
bucketCount);
}
}
void DawnPlatform::HistogramEnumeration(const char* name,
int sample,
int boundaryValue) {
base::UmaHistogramExactLinear(uma_prefix_ + name, sample, boundaryValue);
}
void DawnPlatform::HistogramSparse(const char* name, int sample) {
base::UmaHistogramSparse(uma_prefix_ + name, sample);
}
void DawnPlatform::HistogramBoolean(const char* name, bool sample) {
base::UmaHistogramBoolean(uma_prefix_ + name, sample);
}
dawn::platform::CachingInterface* DawnPlatform::GetCachingInterface() {
return dawn_caching_interface_.get();
}
std::unique_ptr<dawn::platform::WorkerTaskPool>
DawnPlatform::CreateWorkerTaskPool() {
return std::make_unique<AsyncWorkerTaskPool>();
}
bool DawnPlatform::IsFeatureEnabled(dawn::platform::Features feature) {
switch (feature) {
case dawn::platform::Features::kWebGPUUseDXC:
return base::FeatureList::IsEnabled(features::kWebGPUUseDXC);
case dawn::platform::Features::kWebGPUUseTintIR:
return base::FeatureList::IsEnabled(features::kWebGPUUseTintIR);
default:
return false;
}
}
} // namespace gpu::webgpu
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