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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.
#ifndef CHROMEOS_ASH_COMPONENTS_SCHEDULER_CONFIG_SCHEDULER_CONFIGURATION_MANAGER_H_
#define CHROMEOS_ASH_COMPONENTS_SCHEDULER_CONFIG_SCHEDULER_CONFIGURATION_MANAGER_H_
#include <optional>
#include <utility>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chromeos/ash/components/system/scheduler_configuration_manager_base.h"
#include "components/prefs/pref_change_registrar.h"
class PrefRegistrySimple;
class PrefService;
namespace ash {
class DebugDaemonClient;
// Tracks scheduler configuration as provided by the respective local state pref
// and sends D-Bus IPC to reconfigure the system on config changes.
//
// This is the policy to enable and disable Hyper-Threading (H/T) on Intel CPUs.
// Conservative -> Hyper-Threading disabled.
// Performance -> Hyper-Threading enabled.
// For more information on why H/T is configurable, see
// https://www.chromium.org/chromium-os/mds-on-chromeos
//
class SchedulerConfigurationManager : public SchedulerConfigurationManagerBase {
public:
SchedulerConfigurationManager(DebugDaemonClient* debug_daemon_client,
PrefService* local_state);
SchedulerConfigurationManager(const SchedulerConfigurationManager&) = delete;
SchedulerConfigurationManager& operator=(
const SchedulerConfigurationManager&) = delete;
~SchedulerConfigurationManager() override;
static void RegisterLocalStatePrefs(PrefRegistrySimple* registry);
// SchedulerConfigurationManagerBase overrides:
std::optional<std::pair<bool, size_t>> GetLastReply() const override;
private:
void OnDebugDaemonReady(bool service_is_ready);
void OnPrefChange();
void OnConfigurationSet(bool result, size_t num_cores_disabled);
raw_ptr<DebugDaemonClient> debug_daemon_client_ = nullptr;
PrefChangeRegistrar observer_;
bool debug_daemon_ready_ = false;
std::optional<std::pair<bool, size_t>> last_reply_;
base::WeakPtrFactory<SchedulerConfigurationManager> weak_ptr_factory_{this};
};
} // namespace ash
#endif // CHROMEOS_ASH_COMPONENTS_SCHEDULER_CONFIG_SCHEDULER_CONFIGURATION_MANAGER_H_
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