2080Ti双卡开启NVLink

最新推荐文章于 2026-10-05 11:48:24 发布

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最新推荐文章于 2026-10-05 11:48:24 发布 · 2.8k 阅读

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本文详细介绍了在Ubuntu 22.04系统环境下，如何为NVIDIA GeForce RTX 2080 Ti显卡开启NVLink功能。内容包括确保CUDA安装和环境变量配置正确，以及后续的测试步骤，如下载官方例程、编译运行和查看结果。

本文介绍了如何在Ubuntu 22.04系统下给2080Ti双卡开启NVLink的方法。
首先要确保安装好CUDA及配置好环境变量

1、开启

nvidia-smi -pm 1
sudo reboot
nvidia-smi topo -m

结果如下：

(base) root@myd-gpu:~# nvidia-smi topo -m
        GPU0    GPU1    CPU Affinity    NUMA Affinity   GPU NUMA ID
GPU0     X      NV2     0-11,24-35      0               N/A
GPU1    NV2      X      12-23,36-47     1               N/A

Legend:

  X    = Self
  SYS  = Connection traversing PCIe as well as the SMP interconnect between NUMA nodes (e.g., QPI/UPI)
  NODE = Connection traversing PCIe as well as the interconnect between PCIe Host Bridges within a NUMA node
  PHB  = Connection traversing PCIe as well as a PCIe Host Bridge (typically the CPU)
  PXB  = Connection traversing multiple PCIe bridges (without traversing the PCIe Host Bridge)
  PIX  = Connection traversing at most a si