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// Copyright 2013 The Flutter 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 "flutter/shell/common/shell.h"
#include "flutter/benchmarking/benchmarking.h"
#include "flutter/fml/logging.h"
#include "flutter/runtime/dart_vm.h"
#include "flutter/shell/common/thread_host.h"
#include "flutter/testing/elf_loader.h"
#include "flutter/testing/testing.h"
namespace flutter {
static void StartupAndShutdownShell(benchmark::State& state,
bool measure_startup,
bool measure_shutdown) {
auto assets_dir = fml::OpenDirectory(testing::GetFixturesPath(), false,
fml::FilePermission::kRead);
std::unique_ptr<Shell> shell;
std::unique_ptr<ThreadHost> thread_host;
testing::ELFAOTSymbols aot_symbols;
{
benchmarking::ScopedPauseTiming pause(state, !measure_startup);
Settings settings = {};
settings.task_observer_add = [](intptr_t, const fml::closure&) {};
settings.task_observer_remove = [](intptr_t) {};
if (DartVM::IsRunningPrecompiledCode()) {
aot_symbols = testing::LoadELFSymbolFromFixturesIfNeccessary(
testing::kDefaultAOTAppELFFileName);
FML_CHECK(
testing::PrepareSettingsForAOTWithSymbols(settings, aot_symbols))
<< "Could not set up settings with AOT symbols.";
} else {
settings.application_kernels = [&]() {
std::vector<std::unique_ptr<const fml::Mapping>> kernel_mappings;
kernel_mappings.emplace_back(
fml::FileMapping::CreateReadOnly(assets_dir, "kernel_blob.bin"));
return kernel_mappings;
};
}
thread_host = std::make_unique<ThreadHost>(ThreadHost::ThreadHostConfig(
"io.flutter.bench.", ThreadHost::Type::Platform |
ThreadHost::Type::RASTER |
ThreadHost::Type::IO | ThreadHost::Type::UI));
TaskRunners task_runners("test",
thread_host->platform_thread->GetTaskRunner(),
thread_host->raster_thread->GetTaskRunner(),
thread_host->ui_thread->GetTaskRunner(),
thread_host->io_thread->GetTaskRunner());
shell = Shell::Create(
flutter::PlatformData(), task_runners, settings,
[](Shell& shell) {
return std::make_unique<PlatformView>(shell, shell.GetTaskRunners());
},
[](Shell& shell) { return std::make_unique<Rasterizer>(shell); });
}
FML_CHECK(shell);
{
// The ui thread could be busy processing tasks after shell created, e.g.,
// default font manager setup. The measurement of shell shutdown should be
// considered after those ui tasks have been done.
//
// However, if we're measuring the complete time from startup to shutdown,
// this time should still be included.
benchmarking::ScopedPauseTiming pause(
state, !measure_shutdown || !measure_startup);
fml::AutoResetWaitableEvent latch;
fml::TaskRunner::RunNowOrPostTask(thread_host->ui_thread->GetTaskRunner(),
[&latch]() { latch.Signal(); });
latch.Wait();
}
{
benchmarking::ScopedPauseTiming pause(state, !measure_shutdown);
// Shutdown must occur synchronously on the platform thread.
fml::AutoResetWaitableEvent latch;
fml::TaskRunner::RunNowOrPostTask(
thread_host->platform_thread->GetTaskRunner(),
[&shell, &latch]() mutable {
shell.reset();
latch.Signal();
});
latch.Wait();
thread_host.reset();
}
FML_CHECK(!shell);
}
static void BM_ShellInitialization(benchmark::State& state) {
while (state.KeepRunning()) {
StartupAndShutdownShell(state, true, false);
}
}
BENCHMARK(BM_ShellInitialization);
static void BM_ShellShutdown(benchmark::State& state) {
while (state.KeepRunning()) {
StartupAndShutdownShell(state, false, true);
}
}
BENCHMARK(BM_ShellShutdown);
static void BM_ShellInitializationAndShutdown(benchmark::State& state) {
while (state.KeepRunning()) {
StartupAndShutdownShell(state, true, true);
}
}
BENCHMARK(BM_ShellInitializationAndShutdown);
} // namespace flutter