[Vulkan Bug] Wrong-device selection on multi-GPU systems #8
Description
Problem
vulkan.cpp picks the first physical device with compute support, not the fastest/discrete/preferred one. On laptops or mixed iGPU+dGPU systems this can silently pick the wrong adapter.
Tasks
- Add device preference/fitness ranking (prefer discrete GPU)
- Consider device type when selecting physical device
- Add environment variable override for device selection
Related
See "Wrong-device selection" in probable bugs/risky areas.