One Interesting Finding About NCCL关于 NCCL 的一个有趣发现
Working outline. Reproduction and evidence are still being collected.研究提纲：复现过程与证据仍在收集中。
TODO: document the exact observation, topology, versions, and reproduction before publishing a claim.
TODO：在发布结论前，记录精确观察、拓扑、版本和复现方法。