Stateless scheduler doubles LLM training speed

Fine‑tuning a 10 B‑parameter model on a single RTX 4090 feels like watching paint dry—most of the GPU sits idle while a handful of layers chew through memory, and the whole job stalls at a crawl. The bottleneck isn’t the raw FLOPs; it’s the rigid coupling between model weights and the slots you allocate on the device. Pipeline parallelism was supposed to solve that, but conventional schedules bind each model stage to a fixed GPU. When a heavyweight head sits on one card, that card becomes the ch