Perfetto Python API文档
时间: 2023-11-19 20:11:19 浏览: 46
Perfetto是一个开源性能分析工具,可以用于分析移动设备和桌面操作系统的性能。Perfetto Python API是Perfetto的Python绑定,允许用户使用Python脚本编写自定义性能分析任务。
以下是Perfetto Python API的主要组件和用法:
1. 导入Perfetto模块:
```python
import perfetto
```
2. 连接Perfetto远程服务:
```python
with perfetto.TracingController() as tracing:
tracing.connect('localhost:28000')
```
3. 配置tracing会话:
```python
tracing.execute('enable_user_space_profiling')
tracing.execute('start', categories=['gfx', 'input', 'view'])
```
4. 读取trace数据:
```python
for packet in tracing.get_trace():
print(packet)
```
5. 解析trace数据:
```python
from perfetto.protos import trace_packet_pb2
from google.protobuf.json_format import MessageToJson
for packet in tracing.get_trace():
if packet.packet_type == trace_packet_pb2.PacketDescriptor.CHROME_EVENTS:
for event in packet.chrome_events:
print(MessageToJson(event))
```
6. 停止tracing会话:
```python
tracing.execute('stop')
```
以上是Perfetto Python API的主要用法,更多详细的API文档可以在Perfetto官方文档中查阅。