External Cannbot Model Model Infer Runtime Debug

基于 PyTorch 框架的昇腾 NPU 模型推理运行时错误诊断与修复技能。系统化排查模型加载、初始化、推理执行全链路的运行时错误,包括 aicore timeout、HCCL 通信错误、OOM、算子约束违反、推理卡住等。触发场景:NPU 运行时错误(RuntimeError、aicore timeout 507014、HCCL timeout、device synchronize 失败、kernel crash、EZ9999/EE9999 错误码)、推理过程卡住不返回、权重加载阶段 crash、模型加载成功但 forward 失败、分布式推理某些 rank 挂死等。

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