Perfetto Debug Skill

When to Use

Use this skill when investigating VR performance issues on Meta Quest devices:

• Frame drops, jank, or stuttering
• CPU or GPU bottlenecks
• Render pass overhead and GPU utilization
• Thermal throttling and clock frequency changes
• Frame timing variance and missed vsync deadlines
• Thread contention and synchronization issues
• High draw call counts or overdraw

VR Frame Time Targets

These are the hard deadlines for each refresh rate. If a frame exceeds its target, the compositor must reproject or the user sees a stale frame.