HiTrace

Overview

HiTraceMeter provides APIs for system performance tracing.

You can call the HiTraceMeter APIs in your own service logic to effectively track service processes and check the system performance.

HiTraceChain provides APIs for cross-thread and cross-process distributed tracing.

HiTraceChain generates a unique ID for a service execution process and passes it to various information (including HiTraceMeter logging, application events, and HiLog logs) specific to the service process. During debugging and fault locating, you can use the unique chain ID to quickly correlate various information related to the service process.

System capability: SystemCapability.HiviewDFX.HiTrace

Since: 10

Files

Name	Description
trace.h	Defines APIs of the HiTraceMeter and HiTraceChain modules for performance tracing and distributed tracing. The vertical bar (\|) is used as the separator in user-mode trace format. Therefore, the string parameters passed by the HiTraceMeter APIs must exclude this character to avoid trace parsing exceptions. The maximum length of a user-mode trace is 512 characters. Excess characters will be truncated.

Name

Description

trace.h

Defines APIs of the HiTraceMeter and HiTraceChain modules for performance tracing and distributed tracing.
The vertical bar (|) is used as the separator in user-mode trace format. Therefore, the string parameters passed by the HiTraceMeter APIs must exclude this character to avoid trace parsing exceptions.
The maximum length of a user-mode trace is 512 characters. Excess characters will be truncated.