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      <title>GPU全在、驱动正常，训练就是卡死——NVLink悄悄坏了一半</title>
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      <description>8 卡 A800 训练卡死，显卡全在、驱动正常，可训练就是跑不动。查下来是 GPU 之间的 NVLink 高速通道废了 5 条。改一行配置让服务&amp;quot;带伤上岗&amp;quot;，集群满血复活。</description>
      
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