Popping the GPU Bubble

blueblazin

I really appreciate this type of articles. I feel like a lot of knowledge in LLM training and inference is locked inside the heads of practitioners. Similar to compiler engineers before. To work in LLM training/inference you’re expected to know this stuff but to know this stuff you need to be working in the space.

nl

> you find that the GPU often sits idle, not for lack of work, but because the CPU hasn't told it what to do next yet. This phenomenon is called a GPU bubble. This is true, but I've never heard anyone refer to this as a GPU bubble before. I think most people hear "GPU bubble" and think of a financial bubble of some kind.

gardnr

Different bubble than the one I was hoping for. This appears to be different than the recent "Speculative Pipeline Decoding" paper: https://arxiv.org/abs/2605.30852