第43讲 perfetto 自动化之camera前后切换性能自动化分析|极客笔记-凯发k8旗舰厅

本讲是android camera性能分析专题的第43讲，我们介perfetto 自动化之camera前后切换性能自动化分析。

更多资源：

camera前后摄切换性能拆解

camera前后摄切换性能自动化分析代码

代码见视频讲解

#!/usr/bin/env python3
from perfetto.trace_processor import traceprocessor
from perfetto.trace_processor import traceprocessorconfig
tp = traceprocessor(trace=r'switch_camera.perfetto-trace', config=traceprocessorconfig(
    bin_path=r'trace_processor_shell_v3.7.exe',
    verbose=false))
### click switch camera icon
click_app_icon = tp.query('select (slice.ts slice.dur)/1e6 '
                          'from slice '
                          'where ts <(select ts from slice where name == "connectdevice" limit 1) '
                          'and name like "�liverinputevent%" '
                          'order by ts desc '
                          'limit 1')
click_app_icon_ms = click_app_icon.as_pandas_dataframe().values[0][0]
### closcamera
closecamera_sql = """select ts/1e6, dur/1e6 from
                slice
                join thread_track on slice.track_id = thread_track.id
                join thread using(utid)
                join process using(upid)
                where slice.name='disconnectimpl' and process.name='/system/bin/cameraserver'
                limit 1"""
close_camera_df = tp.query(closecamera_sql).as_pandas_dataframe()
close_camera_begin = close_camera_df.values[0][0]
close_camera_dur = close_camera_df.values[0][1]
### opencamera
open_session = tp.query('select (slice.ts/1e6), (slice.dur/1e6) '
                        'from slice '
                        'where slice.name like "�merahal::opensession%"')
open_session_df = open_session.as_pandas_dataframe()
open_session_begin_ms = open_session_df.values[0][0]
open_session_duration_ms = open_session_df.values[0][1]
### beginconfigure
begin_configure = tp.query('select (slice.ts/1e6) '
                          'from slice '
                          'where slice.name like "�ginconfigure%" '
                          'limit 1')
begin_configure_df = begin_configure.as_pandas_dataframe()
begin_configure_ms = begin_configure_df.values[0][0]
### endconfigure
end_configure = tp.query('select (slice.ts/1e6), (slice.dur/1e6) '
                          'from slice '
                          'where slice.name like "%endconfigure%" '
                          'limit 1')
end_configure_df = end_configure.as_pandas_dataframe()
end_configure_begin_ms = end_configure_df.values[0][0]
end_configure_duration_ms = end_configure_df.values[0][1]
### submitrequestlist
submit_request_list = tp.query('select (slice.ts/1e6) '
                          'from slice '
                          'where ts >(select ts from slice where name == "endconfigure" limit 1) '
                          'and slice.name like "%submitrequestlist%" '
                          'order by slice.ts asc '
                          'limit 1')
submit_request_list_df = submit_request_list.as_pandas_dataframe()
submit_request_list_begin_ms = submit_request_list_df.values[0][0]
### cameraserver queue first frame
first_full_buffer = tp.query('select (slice.ts/1e6), (slice.dur/1e6) '
                        'from slice '
                        'where slice.name like "%first full buffer%"')
first_full_buffer_df = first_full_buffer.as_pandas_dataframe()
first_full_buffer_queued_ms = first_full_buffer_df.values[0][0]   first_full_buffer_df.values[0][1]
### print results
print("total switch camera time:"   str(round((first_full_buffer_queued_ms - click_app_icon_ms), 2))   " ms, break down as following:")
print("    [app] click                     -->                  closcamera: "  
      str(round((close_camera_begin - click_app_icon_ms), 2))   " ms")
print("    [hal]                           -->                  closcamera: "  
      str(round((close_camera_dur), 2))   " ms")
print("    [app] closcamera                -->      camerahal::opensession: "  
      str(round((open_session_begin_ms - close_camera_begin - close_camera_dur), 2))   " ms")
print("    [hal]                                    camerahal::opensession: "  
      str(round((open_session_duration_ms), 2))   " ms")
print("    [app] camerahal::opensession    -->              beginconfigure: "  
      str(round((begin_configure_ms - open_session_duration_ms - open_session_begin_ms), 2))   " ms")
print("    [hal] beginconfigure            -->                endconfigure: "  
      str(round((end_configure_begin_ms   end_configure_duration_ms - begin_configure_ms), 2))   " ms")
print("    [app] endconfigure              -->           submitrequestlist: "  
      str(round((submit_request_list_begin_ms - end_configure_begin_ms - end_configure_duration_ms), 2))   " ms")
print("    [hal] submitrequestlist         --> stream x: first full buffer: "  
      str(round((first_full_buffer_queued_ms - submit_request_list_begin_ms), 2))   " ms")

输出