External Cannbot Graph Torch Npugraph Ex Runtime Error Diagnosis

PyTorch 昇腾 NPU npugraph_ex 运行时报错诊断。覆盖 ACL graph 已 capture 成功之后,replay / kernel launch / 通信 / 内存 / device API 阶段的报错排查,包括 aclnnXxx 算子失败、HCCL 错误、stream/event 同步、segfault、device side assert、OOM 等场景。本 skill 由 dfx-triage 路由进入。触发:当用户遇到 npugraph_ex replay / aclnn / HCCL / stream / OOM 等运行时报错时加载。关键词:runtime、ACL、aclnn、HCCL、stream、event、device side assert、segfault、OOM、CANN plog。

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