> As for the GPU timeline, I've been experimenting with timeline semaphores. E.g. all the images (and image views) in descriptor set D must be live as long as semaphore S has value less than X. This coupled with some kind of deletion queue could accurately track lifetimes of resources on the GPU timeline.

> What I would really like to experiment with is using async Rust for GPU programming.

Most of the waiting required is of the form "X can't proceed until A, B, D, and Q are done", plus "Y can't proceed until B, C, and R are done". This is not a good match for the async model.

That many-many keeps coming up in game work. Outside the GPU, it appears when assets such as meshes and textures come from an external server or files, and are used in multiple displayed objects.