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README
Apache-2.0

SOC统一调频部件

简介

SOC统一调频部件是资源调度子系统中的部件之一,资源调度子系统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。详情可参考资源调度服务

SOC统一调频服务作为资源调度子系统的子模块,主要功能是从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。其架构图示如下:

图1 统一调频部件架构图

架构图

架构说明:

1、应用调用系统服务,触发系统事件。

2、在系统事件回调中通过统一调频提供的内部接口插入调频事件桩点。

3、在资源调度服务中感知系统事件,转发给统一调频插件。

4、在统一调频服务中根据系统事件查找配置,找到与其对应的调频配置,经过调频仲裁后得到最终的调频策略。

5、统一调频模块将调频策略参数传递给内核完成调频。

目录

/foundation/resourceschedule/resource_schedule_service
├── 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

编译构建

编译32位ARM系统soc_perf部件:

./build.sh --product-name {product_name} --ccache --build-target soc_perf

编译64位ARM系统soc_perf部件:

./build.sh --product-name {product_name} --ccache --target-cpu arm64 --build-target soc_perf

{product_name}为当前支持的平台,比如rk3568。

说明

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foundation/resourceschedule/resource_schedule_service/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,
ArkUI框架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。

相关仓

资源调度服务子系统

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