harmony 鸿蒙Smartperf-Host User Guide

  • 2023-10-30
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Smartperf-Host User Guide


Smartperf-Host is an intuitive performance and power optimization tool that offers in-depth data mining and fine-grained data visualization. In this tool, you can gain visibility into a multitude of metrics in terms of CPU scheduling, frequency, process and thread time slices, heap memory, frame rate, and more, in swimlanes. Better yet, you can analyze the collected data intuitively on the GUI.


System Architecture

Smartperf-Host consists of the device end and PC end, which exchange data with each other based on gRPC – a high-performance remote procedure call (RPC) framework.

The device end consists of modules such as Native Hook (application-embedded component), hiprofiler_command (command-line tool), hiprofilerd (performance profiler service), a set of performance profiler plug-ins, and some system tools and kernels. The device end provides the plug-in extension capability by exposing plug-in interfaces for external systems. By drawing on this capability, you can integrate custom plug-ins into the framework. For details about the preset plug-ins, see Performance Profiler Component.

The PC end is accessible from the Smartperf-Host website. It consists of modules such as Trace Streamer, SQLite, HDC device management, data import, UI drawing, and data analysis.

Project Directory

├── host                          # Smartperf-Host related code
│   ├── doc                       # Smartperf-Host documentation
│   ├── ide                       # Smartperf-Host IDE module
│   │    └── src                  # Profiler module
│   │    │   ├── base-ui          # Basic components
│   │    │   └── Trace            # Service logic
│   ├── trace_streamer            # Trace Streamer module
│   │    ├── base                 # Basic functionality
│   │    ├── cfg                  # Configuration
│   │    ├── filter               # Filter
│   │    ├── include              # Header files
│   │    ├── multi_platform       # Platform adaptation
│   │    ├── parser               # Parsing service logic
│   │    │   ├── bytrace_parser   # byTrace service logic
│   │    │   └── htrace_parser    # hTrace service logic
│   │    ├── table                # Table structure
│   │    ├── trace_data           # Trace structure
│   │    ├── trace_streamer       # Trace Streamer structure
│   │    │   └── kits             # JS APIs and native APIs

Function Description

  • Loading Trace Files on Web Pages

Load local trace files (such as htrace and ftrace) and display the data in swimlanes. For details, see Loading Trace Files on Web Pages. - Capturing Traces Online

Use Smartperf_Host to capture traces online, with the content, duration, and save path all customizable. For details, see Capturing Traces on Web Pages. - Capturing Traces on a Device

Capture traces on the target device, with the content, duration, and save path all customizable. For details, see Capturing Traces from a Device. - Using Ability Monitor

With Ability Monitor in Smartperf_Host, you can learn the CPU, memory, disk I/O, and network usage of your application. For details, see Ability Monitor Usage. - Using Native Memory

With Native Memory in Smartperf_Host, you can track the allocation and release of your application’s native memory (specific to C and C++). For details, see Native Memory Usage. - Using Hiperf

With Hiperf in Smartperf_Host, you can view the CPU usage of your application and the call stack. For details, see Hiperf Usage. - Using HiSystemEvent

With HiSystemEvent in Smartperf_Host, you can inspect the power consumption of each category (CPU, network, and location, and more) of your application, resource application and usage records (WorkScheduler, Runninglock, Alarm, and Location Request), power consumption exceptions, and system states associated with the power consumption (battery level and screen status). For details, see HiSystemEvent Usage. - Collecting FileSystem Records

In Smartperf_Host, you can find out the system invoking information and read/write invoking times of all file systems. For details, see Usage of FileSystem Recording. - Collecting Page Fault Records

In Smartperf_Host, you can collect page fault records, covering various aspects such as start time, duration, triggering process, triggering thread, event type, memory address, and memory size of page memory events. For details, see Usage of Page Fault Recording. - Collecting BIO Records

In Smartperf_Host, you can collect I/O operation records, which provide the following information: start time, total latency, process, average latency of every 4 KB data, thread, operation (write data, page swap-in, and metadata), access traffic, path, block number, priority, and backtrace call stack. For details, see Usage of BIO Latency Recording. - Collecting Smaps Records

In Smartperf_Host, you can collect the smaps data (type, Pss, Rss, Vss, and more) on a process-by-process basis. The data source is /proc/$pid/smaps. For details, see Smaps Usage. - Using SQL Analysis and Metrics

You can use Query (SQL) and Metrics features to quickly locate the trace data. For details, see SQL Analysis and Metrics Usage.

Compilation Guidance

Project compilation includes Trace Streamer compilation and Smartperf-Host compilation and deployment.


  • C++ version: 11 or later

  • Node.js version: 16.15.1 or later

  • npm version: 8.13.2 or later

  • TypeScript version: 4.2.3 or later

  • Go version: 1.13.8 or later

    Compiling Trace Streamer

    To set up the Smartperf_Host website, you need to compile the WASM version of Trace Streamer for the web page to parse the original trace data. For details about the compilation process, see Compiling Trace Streamer.

    Compiling and Deploying Smartperf-Host

    For details about the compilation and deployment process, see SmartPerf Compilation and Deployment Guide). After successful deployment, you can start to use Smartperf_Host by visiting https://[IP address of the device where SmartPerf is deployed]:9000/application/.


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