macos安装metal 加速版 pytorch

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categories: [Python]
tags: Python MacOS

写在前面

试试 m3 的 metal 加速效果如何

Mac computers with Apple silicon or AMD GPUs
macOS 12.3 or later
Python 3.7 or later
Xcode command-line tools: xcode-select --install

安装 Python: conda-forge

brew install miniforge

镜像

channels:- defaults
show_channel_urls: true
auto_activate_base: false
ssl-verify: false
default_channels:- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2
custom_channels:conda-forge: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloudmsys2: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloudbioconda: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloudmenpo: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloudpytorch: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloudpytorch-lts: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloudsimpleitk: https://mirrors.tuna.tsinghua.edu.cn/anaconda/clouddeepmodeling: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/

安装

开一个新的虚拟环境, 这个是重点, 如果不开的话, 原有的环境会污染 C 库的链接, 所以这一步是必须的

On Mac OS X, import numpy complaining about “Library not loaded: @rpath/libgfortran.3.dylib” · Issue #12970 · numpy/numpy;

这个方案不彻底, 直接卸载 numpy 然后重装不能解决问题…

conda create -n py3xi python=3.11
conda activate py3xi
# conda update --all -c conda-forge # optional
# 重点: 
conda install pytorch torchvision torchaudio -c pytorch-nightly

然后测试

Accelerated PyTorch training on Mac - Metal - Apple Developer;

import torch
if torch.backends.mps.is_available():mps_device = torch.device("mps")x = torch.ones(1, device=mps_device)print (x)
else:print ("MPS device not found.")
'''
tensor([1.], device='mps:0')
'''