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README
Apache-2.0

资源调度服务

简介

在资源调度子系统中,提供系统事件的感知以及分发,例如应用启动、退出、亮灭屏等。如果需要获取系统事件,并且进行相关资源调度,那么可以选择以插件形式加入资源调度服务中。

作为资源调度子系统的子模块,智能分组模块通过系统内应用前后台切换、用户焦点输入、后台任务的执行状态,决策进程的分组调度策略,并支持通过配置将调度策略映射到不同的CGROUP分组,为系统的性能、功耗均衡调度提供决策依据。同时该模块向资源调度框架转发应用状态、焦点状态、后台任务状态等系统事件,供插件订阅。

resource_schedule_service是接收事件,决策调度策略和执行调度机制的引擎,其架构图示如下: img 其中包括以下几个重要组成部分: 1、事件管理器,包含了使用对外接口直接感知系统事件,以及使用监听形式感知系统事件功能。 2、应用智能分组,该组件接收应用生命周期变更的事件,决策应用的分组优先级,是全局资源调度的根本依据。 3、插件管理器,负责产品对应资源调度插件的加载,接收系统和应用的事件,并根据插件的订阅情况将事件分发给插件。 4、SOC统一调频服务,该服务主要是从SOC统一调频插件中接收调频事件,进行相关的调频仲裁,最终使用内核接口设置CPU频率策略。

resource_schedule_service主要通过插件的形式进行扩展和实现系统全局资源的调度功能,插件以动态链接的形式运行,不同产品可以选择不同的插件进行加载。目前已知的插件有智能感知调度插件、设备状态管理插件、SOC统一调频插件。其中SOC统一调频插件的服务包含在resource_schedule_service中,而另外两个插件的服务包含在其它仓内,最终都是根据系统事件设置调度策略到内核中进行实施。

目录

/foundation/resourceschedule/resource_schedule_service
├── cgroup_sched
|   ├── common
|   │   └── include                   # 公共头文件
|   ├── framework                     # 主体代码
|   │   ├── process_group             # 分组设置接口
|   │   ├── sched_controller          # 分组计算
|   │   └── utils                     # RSS数据转发适配接口
|   │       ├── include
|   │       │   └── ressched_utils.h  # 事件上报头文件
|   │       └── ressched_utils.cpp    # 事件上报接口
|   ├── interfaces                    # 供RSS初始化、查询分组接口
|   │   └── innerkits                 # 对外接口目录
|   └── profiles                      # 配置文件
└── ressched
|   ├── common                        # 公共头文件
|   ├── interfaces
|   │   └── innerkits                 # 对外接口目录
|   │       └── ressched_client       # 外部同步事件通知接口
|   ├── plugins                       # 插件代码实现
|   ├── profile                       # 插件开关以及私有配置
|   ├── sa_profile                    # 系统元能力配置
|   ├── sched_controller              # 事件采集
|   |   ├── common_event              # 事件采集公共接口
|   |   └── observer                  # 监听事件采集
|   |       ├── audio_observer        # 音频事件监听回调
|   |       ├── camera_observer       # 相机事件监听回调
|   |       └── telephony_observer    # 电话状态监听回调
|   └── services
|       ├── resschedmgr
|       │   ├── pluginbase            # 插件结构定义
|       │   └── resschedfwk           # 资源调度服务框架实现
|       └── resschedservice           # 资源调度服务层
└── soc_perf
    ├── common                        # 公共头文件
    ├── interfaces
    │   └── inner_api                 # 对外接口目录
    │       └── socperf_client        # SocPerf客户端代码,给调用者使用的接口
    ├── profile                       # 调频配置文件
    ├── sa_profile                    # 系统元能力配置
    ├── services
        ├── core                      # SocPerf核心业务逻辑代码,仲裁并生效最终的调频结果
        └── server                    # SocPerf服务端代码,用于接受客户端发送的调频请求

如何编写一个插件

接口说明

接口名 接口描述
function OnPluginInit(std::string& libName): bool; 插件初始化
function OnPluginDisable(): void; 插件退出
function OnDispatchResource(const std::shared_ptr<ResData>& data):void; 获取分发的事件

使用说明

插件初始化的时候,指定需要注册监听的事件。在这些事件发生的时候,框架会依次分发给各个插件, 此时插件需要快速处理消息接收进行资源调度(需要有耗时任务则需另起线程处理),处理完成后返回。

插件事件处理约束

1、插件可以用C/C++实现。

2、插件的事件处理,必须快速完成,超过1ms会打印相关告警,超过10ms,框架认为插件异常而进行插件退出操作。

分组策略

基础分组策略

场景描述 分组策略
前台焦点应用,UID相同的进程 top_app
前台可见的,包括分屏场景下的非焦点应用进程、悬浮窗对应的进程、foundation进程等 foreground
一些系统级后台常驻进程,不由分组计算主动设置。在rc/cfg文件中写定,直接写入system分组 system
退到后台的前一个应用,及其相关的进程 background
OS内核和其他native进程,以及上面没有涉及到的一些进程 root

策略配置

通过JSON配置文件,对每个分组策略,绑定指定的CGROUP分组。

  "Cgroups": [
    {
      "controller": "cpu",
      "path": "/dev/cpuctl",
      "sched_policy": {
        "sp_default": "",
        "sp_background": "background",
        "sp_foreground": "foreground",
        "sp_system_background": "system-background",
        "sp_top_app": "top-app"
      }
    },
    {
      "controller": "cpuset",
      "path": "/dev/cpuset",
      "sched_policy": {
        "sp_default": "",
        "sp_background": "background",
        "sp_foreground": "foreground",
        "sp_system_background": "system-background",
        "sp_top_app": "top-app"
      }
    }
  ]

配置约束

策略配置路径:cgroup_action_config.json文件; 每个sp_xxx策略都需要配置

配置参数说明:

配置项 说明
controller 当前配置项对应的cgroup分组控制器
path cgroup分组对应的路径
sched_policy 不同分组调度策略对应到的具体分组
sp_xx 不同分组调度策略标识

统一调频

调频接口说明

当前可支持的调频接口说明

接口 说明
PerfRequest(int32_t cmdId, const std::string& msg) 用于性能提频使用
PerfRequestEx(int32_t cmdId, bool onOffTag, const std::string& msg) 用于性能提频使用且支持ON/OFF事件
PowerLimitBoost(bool onOffTag, const std::string& msg) 用于限制boost无法突破功耗限频
ThermalLimitBoost(bool onOffTag, const std::string& msg) 用于限制boost无法突破热限频
LimitRequest(int32_t clientId, const std::vector<int32_t>& tags, const std::vector<int64_t>& configs, const std::string& msg) 用于热或功耗模块的限频且支持多项值一同设置

如表格所示,所有的调频接口都以cmdID为核心,将调频场景和调频参数互相关联,实现提频或者限频的功能。
带onOffTag参数的接口表示该接口支持ON/OFF的开关调频模式,一般用于生效时间不固定的长期调频事件,需要调用者手动开启或者关闭。
msg参数为拓展字符串信息,可承载例如调用客户端pid/tid等信息。

调频配置说明

当前configs目录下的配置文件

配置文件 说明
socperf_resource_config.xml 定义产品可支持的资源配置,例如CPU/GPU/DDR/NPU等
socperf_boost_config.xml 用于性能提频的配置文件

各个xml配置文件都需要按产品定制,不同产品的配置不相同。
对于指定的某产品,所有可支持配置的资源都定义在socperf_resource_config.xml内,支持单路径/多路径配置,任何资源都有唯一的resID。
socperf_boost_config.xml使用的cmdID不能重复。

调频使用举例

以点击提频事件为例。

点击场景提频为固定生效时间,无需使用ON/OFF手动开启或关闭,故使用PerfRequest接口即可。因此需要在合适的地方调用soc_perf提供的IPC接口PerfRequest实现提频请求。

资源调度服务对所有事件的采集有统一的入口,即资源调度框架对订阅事件的插件进行分发的机制,调频服务也依赖该机制实现对于各个需要调频的场景的感知。

调频服务已实现为一个单独的调频插件socperf_plugin,定义在/ressched/plugins/socperf_plugin目录下。
要实现点击场景的提频,分为点击事件插桩、事件上报给资源调度框架、框架给插件分发事件、生效调频服务四个步骤。

第一步,
ACE子系统仓内实现了对资源调度框架提供的可动态加载接口ReportData的封装,路径为/framework/base/ressched/ressched_report.h 并在/framework/core/gestures/click_recognizer.cpp增加了打点作为手势识别中对点击事件的判定

第二步,
通过动态加载libressched_client.z.so,调用资源调度框架提供的接口ReportData,ACE子系统将点击事件上报给全局资源调度子系统

第三步,
在资源调度框架里,点击事件类型定义在/ressched/interfaces/innerkits/ressched_client/include/res_type.h内,为RES_TYPE_CLICK_RECOGNIZE
由于调频插件socperf_plugin在初始化过程中已完成了对该点击事件的订阅,因此框架会在接受到事件通知时将点击事件分发给调频插件

第四步,
调频插件socperf_plugin对于点击事件分配了cmdID:PERF_REQUEST_CMD_ID_EVENT_CLICK,路径在/ressched/plugins/socperf_plugin/src/socperf_plugin.cpp下
通过调用调频服务提供的IPC接口PerfRequest,插件会给调频服务发送请求,实现点击提频功能。

监听事件采集

目前支持音频框架相关事件、电话子系统相关事件、相机相关事件监听回调,

监听音频框架中音频流状态变化、声音模式变化和整机声音变化

监听电话状态变化

监听相机状态变化

相关仓

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