Diwei Su

icon company Beijing Normal University icon location Beijing icon location I'm a first-year Ph.D candidate in the School of Artificial Intelligence at Beijing Normal University. Research interests: brain-inspired AI

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[import jittor will try to download NCCL even NCCL is loaded]

我的是jittor1.3.9.14，源码中看到有以下代码是用来检测nccl的，可能是没检测到： ```python if not use_nccl: return nccl_include_path = os.environ.get("nccl_include_path") nccl_lib_path = os.environ.get("nccl_lib_path") ``` 同样服务器手动无网络安装nccl，检查.bashrc和.profile，发现没有jittor所需的环境变量，添加环境变量即可让jittor检测到服务器已安装的nccl跳过下载步骤： ```python export nccl_include_path=nccl-master/build/include export nccl_lib_path=nccl-master/build/lib ```