“How to monitor the display framerate”的版本间的差异
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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: |
+ | {{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" ('''f'''rames '''p'''er '''s'''econd): | ||
+ | <pre> | ||
+ | display 50fps | ||
+ | display 50fps | ||
+ | display 50fps | ||
+ | </pre> | ||
− | [[ | + | 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. | ||
+ | * [[Debugfs]] configuration needs to be enabled. | ||
+ | |||
+ | <noinclude> | ||
+ | [[Category:How to trace and debug]] | ||
+ | [[Category:DRM KMS]] | ||
+ | {{PublicationRequestId | 9899 | 2018-12-06 | AlainF}} | ||
+ | </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.
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