[NewFeture]add ep rollout model init and update/clear ep buffer #4039
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gzy19990617
changed the title
EmmonsCurse
previously approved these changes
Sep 17, 2025
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1.支持 EP Rollout 模型初始化。
2.告别 Hard Code：num_nvl_bytes 和 num_rdma_bytes 由模型参数动态计算，单机 8 卡下每卡节省 5G+ 显存。
3.引入 DeepEPBufferManager：实现DeeepEP buffer的动态申请与释放，按需分配，进一步节约显存。
4.重构部分ep.py，抽象出 DeepEPBuffer 类，代码结构更清晰、简洁（未来还需进一步优化）。