https://answer.freetools.me/tags/%E6%BF%80%E6%B4%BB%E9%87%8D%E8%AE%A1%E7%AE%97/ Recent content in 激活重计算 on Answer Hugo -- 0.152.2 zh-cn Mon, 09 Mar 2026 05:36:18 +0800 https://answer.freetools.me/%E6%A2%AF%E5%BA%A6%E6%A3%80%E6%9F%A5%E7%82%B9%E5%A6%82%E4%BD%95%E8%AE%A9%E5%A4%A7%E6%A8%A1%E5%9E%8B%E8%AE%AD%E7%BB%83%E7%AA%81%E7%A0%B4%E6%98%BE%E5%AD%98%E7%93%B6%E9%A2%88%E4%BB%8E%E6%97%B6%E9%97%B4%E6%8D%A2%E7%A9%BA%E9%97%B4%E5%88%B0%E9%80%89%E6%8B%A9%E6%80%A7%E9%87%8D%E8%AE%A1%E7%AE%97%E7%9A%84%E6%8A%80%E6%9C%AF%E8%BF%9B%E5%8C%96/ Mon, 09 Mar 2026 05:36:18 +0800 https://answer.freetools.me/%E6%A2%AF%E5%BA%A6%E6%A3%80%E6%9F%A5%E7%82%B9%E5%A6%82%E4%BD%95%E8%AE%A9%E5%A4%A7%E6%A8%A1%E5%9E%8B%E8%AE%AD%E7%BB%83%E7%AA%81%E7%A0%B4%E6%98%BE%E5%AD%98%E7%93%B6%E9%A2%88%E4%BB%8E%E6%97%B6%E9%97%B4%E6%8D%A2%E7%A9%BA%E9%97%B4%E5%88%B0%E9%80%89%E6%8B%A9%E6%80%A7%E9%87%8D%E8%AE%A1%E7%AE%97%E7%9A%84%E6%8A%80%E6%9C%AF%E8%BF%9B%E5%8C%96/ 深入解析Gradient Checkpointing的核心原理：从2016年Tianqi Chen的开创性论文到NVIDIA的选择性重计算技术，揭示大模型训练如何通过"用计算换内存"突破显存瓶颈。涵盖O(√n)内存复杂度的数学证明、Transformer激活内存的精确公式、Sequence Parallelism与Selective Recomputation的协同优化，以及PyTorch/DeepSpeed/Megatron-LM的实战配置。