Alibaba Cloud Big Data AI Platform

Jul 16, 2025 · Artificial Intelligence

ChunkFlow: Accelerating Long‑Context Model Fine‑Tuning Up to 4.5× Faster

The paper introduces ChunkFlow, an efficient training framework for variable‑length and ultra‑long sequence datasets that powers Qwen models, achieving up to 4.53× speedup over Megatron‑LM and more than 2× overall performance gains by reorganizing data into fixed‑size chunks and employing a state‑aware scheduler.