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To make sure the display stays responsive, we've been tracking how changes affect its performance.
Procedure
Build with --release. Test on Chromium with VSCodium, gedit, and the AMDGPU_TOP GUI running, and all other programs closed. In case it matters, keep the display prototype fully visible on the right half of the screen, with the AMDGPU_TOP plots visible on the left half. Start the turntable and then monitor AMDGPU_TOP stats for a minute or so.
Results
| Commit | Description | Graphics pipe | Browser CPU | Browser GFX | Browser VRAM | GPU power | Comments |
|---|---|---|---|---|---|---|---|
4afc820 |
Sort fragments while shading | 50–60% | 15–30% | 50% | 9 W | ||
4afc variant |
SPHERE_MAX_INTERNAL = 12 |
80–90% | 15–20% | 80–90% | 27 W | ||
4afc variant |
SPHERE_MAX_INTERNAL = 4 |
40–50% | 15–20% | 35–40% | 8–9 W | ||
e80adf8 |
Correct hit detection | 50–60% | 15–30% | 50% | 9 W | Texture pipe and efficiency arbiter are more like 45–60% | |
6db9f5b |
Only draw the top few fragments | 55–65% | 15–30% | 50–60% | 9 W | ||
6db9 variant |
LAYER_MAX = 8 |
35–50% | 15–25% | 38–45% | 9 W | ||
a4236a3 |
Dim sphere interiors | 55–65% | 15–25% | 50–60% | 94 MiB | 10 W |