blob: 0f3b07bd49512f77a5c98f816c6ad400494f4f56 [file] [log] [blame]
// Copyright 2018 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 "content/browser/startup_helper.h"
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/system/sys_info.h"
#include "base/task/thread_pool/initialization_util.h"
#include "base/task/thread_pool/thread_pool.h"
#include "build/build_config.h"
#include "content/common/thread_pool_util.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/common/content_switches.h"
namespace content {
namespace {
std::unique_ptr<base::ThreadPool::InitParams> GetDefaultThreadPoolInitParams() {
#if defined(OS_ANDROID)
// Mobile config, for iOS see ios/web/app/web_main_loop.cc.
return std::make_unique<base::ThreadPool::InitParams>(
base::ThreadGroupParams(
base::RecommendedMaxNumberOfThreadsInThreadGroup(4, 8, 0.2, 0),
base::TimeDelta::FromSeconds(30)),
base::ThreadGroupParams(
base::RecommendedMaxNumberOfThreadsInThreadGroup(6, 8, 0.6, 0),
base::TimeDelta::FromSeconds(30)));
#else
// Desktop config.
return std::make_unique<base::ThreadPool::InitParams>(
base::ThreadGroupParams(
base::RecommendedMaxNumberOfThreadsInThreadGroup(6, 8, 0.2, 0),
base::TimeDelta::FromSeconds(30)),
base::ThreadGroupParams(
base::RecommendedMaxNumberOfThreadsInThreadGroup(16, 32, 0.6, 0),
base::TimeDelta::FromSeconds(30))
#if defined(OS_WIN)
,
base::ThreadPool::InitParams::CommonThreadPoolEnvironment::COM_MTA
#endif // defined(OS_WIN)
);
#endif
}
} // namespace
std::unique_ptr<base::FieldTrialList> SetUpFieldTrialsAndFeatureList() {
auto field_trial_list = std::make_unique<base::FieldTrialList>(nullptr);
const base::CommandLine* command_line =
base::CommandLine::ForCurrentProcess();
// Ensure any field trials specified on the command line are initialized.
if (command_line->HasSwitch(::switches::kForceFieldTrials)) {
// Create field trials without activating them, so that this behaves in a
// consistent manner with field trials created from the server.
bool result = base::FieldTrialList::CreateTrialsFromString(
command_line->GetSwitchValueASCII(::switches::kForceFieldTrials),
std::set<std::string>());
CHECK(result) << "Invalid --" << ::switches::kForceFieldTrials
<< " list specified.";
}
base::FeatureList::InitializeInstance(
command_line->GetSwitchValueASCII(switches::kEnableFeatures),
command_line->GetSwitchValueASCII(switches::kDisableFeatures));
return field_trial_list;
}
void StartBrowserThreadPool() {
auto thread_pool_init_params =
GetContentClient()->browser()->GetThreadPoolInitParams();
if (!thread_pool_init_params)
thread_pool_init_params = GetDefaultThreadPoolInitParams();
DCHECK(thread_pool_init_params);
// If a renderer lives in the browser process, adjust the number of
// threads in the foreground pool.
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kSingleProcess)) {
const base::ThreadGroupParams& current_foreground_thread_group_params(
thread_pool_init_params->foreground_thread_group_params);
thread_pool_init_params->foreground_thread_group_params =
base::ThreadGroupParams(
std::max(GetMinForegroundThreadsInRendererThreadPool(),
current_foreground_thread_group_params.max_tasks()),
current_foreground_thread_group_params.suggested_reclaim_time(),
current_foreground_thread_group_params.backward_compatibility());
}
base::ThreadPool::GetInstance()->Start(*thread_pool_init_params.get());
}
} // namespace content