harmony 鸿蒙trace.h

2023-10-30
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trace.h

Overview

Defines APIs of the HiTraceMeter module for performance trace.

Example

Synchronous time slice trace event:

OH_HiTrace_StartTrace("hitraceTest");
OH_HiTrace_FinishTrace();

Output:

<...>-1668 (----—) [003] .... 135.059377: tracing_mark_write: B|1668|H:hitraceTest
<...>-1668 (----—) [003] .... 135.059415: tracing_mark_write: E|1668|

Asynchronous time slice trace event:

OH_HiTrace_StartAsyncTrace("hitraceTest", 123);
OH_HiTrace_FinishAsyncTrace("hitraceTest", 123);

Output:

<...>-2477 (----—) [001] .... 396.427165: tracing_mark_write: S|2477|H:hitraceTest 123
<...>-2477 (----—) [001] .... 396.427196: tracing_mark_write: F|2477|H:hitraceTest 123

Integer value trace event:

OH_HiTrace_CountTrace("hitraceTest", 500);

Output:

<...>-2638 (----—) [002] .... 458.904382: tracing_mark_write: C|2638|H:hitraceTest 500

Since

Related Modules

Hitrace

Summary

Functions

Name	Description
OH_HiTrace_StartTrace (const char *name)	Marks the start of a synchronous trace.
OH_HiTrace_FinishTrace (void)	Marks the end of a synchronous trace.
OH_HiTrace_StartAsyncTrace (const char *name, int32_t taskId)	Marks the start of an asynchronous trace.
OH_HiTrace_FinishAsyncTrace (const char *name, int32_t taskId)	Marks the end of an asynchronous trace.
OH_HiTrace_CountTrace (const char *name, int64_t count)	Traces the value change of an integer variable based on its name.