“How to monitor the display framerate”的版本间的差异

来自百问网嵌入式Linux wiki
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{{DISPLAYTITLE:如何监控显示帧率}}
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When an animation is running on the display, the related framerate can be monitored from the [[DRM KMS overview | display driver]] level thanks to the command:
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{{Board$}} (while true; do export fps=`cat /sys/kernel/debug/dri/0/state | grep fps -m1 | grep -o '[0-9]\+'`; echo display ${fps}fps; sleep 4; done) &
  
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The display framerate is then periodically output in the user console in "fps" ('''f'''rames '''p'''er '''s'''econd):
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<pre>
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display 50fps
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display 50fps
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display 50fps
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</pre>
  
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[[Category:Linux_Operating_System]]
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Notes:
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[[Category:Visual]]
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* Stop monitoring the framerate with the command "kill -9 `ps -o ppid= -C sleep`".
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[[Category:DRM_KMS]]
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* Adjust the framerate update period by modifying the "sleep" value (4 seconds in the example).
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* Use the command "dmesg -n8" to mix both user and kernel console outputs.
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* [[Debugfs]] configuration needs to be enabled.
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<noinclude>
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[[Category:How to trace and debug]]
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[[Category:DRM KMS]]
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{{PublicationRequestId | 9899 | 2018-12-06 | AlainF}}
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</noinclude>

2020年5月8日 (五) 22:37的版本

When an animation is running on the display, the related framerate can be monitored from the display driver level thanks to the command: 

Board $> (while true; do export fps=`cat /sys/kernel/debug/dri/0/state | grep fps -m1 | grep -o '[0-9]\+'`; echo display ${fps}fps; sleep 4; done) &

The display framerate is then periodically output in the user console in "fps" (frames per second): 

display 50fps
display 50fps
display 50fps

Notes:

  • Stop monitoring the framerate with the command "kill -9 `ps -o ppid= -C sleep`".
  • Adjust the framerate update period by modifying the "sleep" value (4 seconds in the example).
  • Use the command "dmesg -n8" to mix both user and kernel console outputs.
  • 调试文件系统(debugfs) configuration needs to be enabled.

<securetransclude src="ProtectedTemplate:PublicationRequestId" params="9899 | 2018-12-06 | AlainF"></securetransclude>

取自“http://wiki.100ask.org/index.php?title=How_to_monitor_the_display_framerate&oldid=6846”