Journal-2025

1.8

uv安装有特殊要求的包

uv add flash-attn --no-build-isolation
uv add --editable ./path/to/package

切换CUDA版本

首选使用update-alternatives，如果不能使用，则可以通过指定环境变量的方式：

cuda_path="/usr/local/cuda-11.7" # or other

export CUDA_HOME="${cuda_path}"
export CUDA_ROOT="${cuda_path}"
export LD_LIBRARY_PATH="${cuda_path}/lib64:${cuda_path}/lib:${LD_LIBRARY_PATH}"
export PATH="${cuda_path}/bin:${PATH}"

uv安装PyTorch最佳实践

1. 在系统中安装所需CUDA版本

2. 根据PyTorch和CUDA版本需求，在PyTorch官网确定要使用的index

3. 在pyproject.toml中添加相应源，并指定explicit = true使得仅torch相关包使用该源。 例如：

   [tool.uv.sources]
   torch = [{ index = "pytorch-cu121" }]
   torchvision = [{ index = "pytorch-cu121" }]
   
   [[tool.uv.index]]
   url = "https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple"
   default = true
   
   [[tool.uv.index]]
   name = "pytorch-cu121"
   url = "https://download.pytorch.org/whl/cu121"
   explicit = true

4. 执行uv sync同步环境

ref

1.7

git打包文件

git可以将工作区打包为压缩包，只包含被跟踪的文件

git archive --output "./output.tar.gz" master # 文件类型通过--output自动推断

对Gradio应用进行反向代理

反代gradio应用时（例如example.com/gradio-demo -> localhost:7860），由于gradio无法感知到外部url路径，会给出错误的资源url，可以通过设置GRADIO_ROOT_PATH环境变量解决。ref

server {
    listen 80;
    server_name example.com www.example.com;  # Change this to your domain name

    location /gradio-demo/ {  # Change this if you'd like to server your Gradio app on a different path
        proxy_pass http://127.0.0.1:7860/; # Change this if your Gradio app will be running on a different port
        proxy_buffering off;
        proxy_redirect off;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

1.6

Shell在管道中间复制一份到错误流

command1 | command2 # original
command1 | tee /dev/stderr | command2 # for debug

1.1

$\text{The Best Year Ever!}$