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  • 报错:OSError: libnccl.so.2: cannot open shared object file: No such file or directory

    因为没有安装nccl,本机为centos7

    https://developer.nvidia.com/nccl/nccl-legacy-downloads

    需要登录一下

    得到nccl-repo-rhel7-2.7.8-ga-cuda10.1-1-1.x86_64.rpm

    安装教程 :https://docs.nvidia.com/deeplearning/nccl/install-guide/index.html#down

    1)运行:

    rpm -ivh nccl-repo-rhel7-2.7.8-ga-cuda10.1-1-1.x86_64.rpm

    2)然后运行:

    yum-config-manager --add-repo https://developer.download.nvidia.com/compute/cuda/repos/rhel7/x86_64/cuda-rhel7.repo

    返回:

    Loaded plugins: product-id
    adding repo from: https://developer.download.nvidia.com/compute/cuda/repos/rhel7/x86_64/cuda-rhel7.repo
    grabbing file https://developer.download.nvidia.com/compute/cuda/repos/rhel7/x86_64/cuda-rhel7.repo to /etc/yum.repos.d/cuda-rhel7.repo
    cuda-rhel7.repo                                                                                                                                        |  232 B  00:00:00
    repo saved to /etc/yum.repos.d/cuda-rhel7.repo 

    3)更新:

    sudo yum update

    4)安装:

    yum install libnccl-2.7.8-1+cuda10.1 libnccl-devel-2.7.8-1+cuda10.1 libnccl-static-2.7.8-1+cuda10.1 

    该错就没了

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  • 原文地址:https://www.cnblogs.com/wanghui-garcia/p/14974055.html
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