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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gl/startup_trace.h"
#include "base/no_destructor.h"
#include "base/task/sequenced_task_runner.h"
#include "base/trace_event/trace_event.h"
namespace gl {
namespace {
constexpr char kTraceCategory[] = "gpu,startup";
} // namespace
std::atomic<bool> StartupTrace::startup_in_progress_ = false;
// static
StartupTrace* StartupTrace::GetInstance() {
static base::NoDestructor<StartupTrace> g_instance;
return g_instance.get();
}
// static
void StartupTrace::Startup() {
startup_in_progress_.store(true);
}
// static
void StartupTrace::StarupDone() {
startup_in_progress_.store(false);
gl::StartupTrace::GetInstance()->RecordAndClearStages();
}
StartupTrace::StartupTrace() {
BindToCurrentThread();
}
StartupTrace::~StartupTrace() = default;
void StartupTrace::BindToCurrentThread() {
if (!task_runner_ && base::SequencedTaskRunner::HasCurrentDefault()) {
task_runner_ = base::SequencedTaskRunner::GetCurrentDefault();
}
}
StartupTrace::ScopedStage::ScopedStage(size_t size) : size(size) {}
StartupTrace::ScopedStage::~ScopedStage() {
if (size) {
StartupTrace::GetInstance()->stages_[size - 1].end = base::TimeTicks::Now();
}
}
StartupTrace::ScopedStage StartupTrace::AddStage(const char* name) {
DCHECK(!base::SequencedTaskRunner::HasCurrentDefault() ||
task_runner_->RunsTasksInCurrentSequence());
stages_.emplace_back(name, base::TimeTicks::Now(), base::TimeTicks());
return StartupTrace::ScopedStage{stages_.size()};
}
void StartupTrace::RecordAndClearStages() {
auto t = perfetto::ThreadTrack::Current();
for (auto& stage : stages_) {
TRACE_EVENT_BEGIN(kTraceCategory, perfetto::StaticString{stage.name}, t,
stage.start);
TRACE_EVENT_END(kTraceCategory, t, stage.end);
}
stages_.clear();
}
} // namespace gl
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