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The Profile GPU Rendering tool displays, as a scrolling histogram, a visual representation of how much time it takes to render the frames of a UI window relative to a benchmark of 16ms per frame. GPU overdraw helps to identify overdraw by color-coding your UI.

Prerequisite

• Setup Powerup Android.

Steps

• Enable the profiler
  • On your device, go to Settings and tap Developer Options.
  • In the Monitoring section, select Profile GPU Rendering.
  • In the Profile GPU Rendering dialog, choose On screen as bars to overlay the graphs on the screen of your device.
  • Open the Powerup app that you want to profile.
• Inspect the output
  • The following are a few things to note about the output:
    • Each bar has colored components that map to a stage in the rendering pipeline, mention rendering stages for each segment.
• Visualize GPU overdraw
  • On your device, go to Settings and tap Developer Options.
  • Scroll down to the Hardware accelerated rendering section, and select Debug GPU Overdraw.
  • In the Debug GPU overdraw dialog, select Show overdraw areas.

Work submission

• Submit screenshots of Profile GPU Rendering graph and the above mentioned requirements.
• Submit the screenshots of GPU overdraw areas.
• Submit all the screenshots in the form of a document along with your report for each screenshot.
• Continue to (Part 2 of 2) AFTER completing this.

Resources

• Ask any questions in #powerup on Systers Open source Slack.
• Reference article