• numpy array -> GPU buffer -> compute -> copy result into numpy array

• macOS
• Xcode (or CommandLineTools)
  • Metal Framework
• Python 3.x

(python)

• brew install pyenv
• pyenv install 3.7.1

(venv)

• git clone https://github.com/wtnb75/runmetal.git
• cd runmetal
• python -m venv .
• ./bin/pip install -r requirements.txt
• ./bin/python setup.py install

(released version)

• pip install runmetal

Usage: runmetal [OPTIONS] COMMAND [ARGS]...

Options:
  --help  Show this message and exit.

Commands:
  compile
  lsdev
  mtlinfo
  run

• compile
  • precompile source in YAML to .metallib
  • ... may not work (depends on your environment)
• lsdev
  • list GPU device
• mtlinfo
  • show GPU info like mtlinfo
• run
  • run recipe

• pi
  • calculate π by monte carlo
    • numpy.random.random()
    • -> copy numpy to GPU buffer
    • -> compute sqrt(x*x+y*y) < 1.0
    • -> copy GPU buffer to numpy bool8 array
    • numpy.sum(result == True)/len(result)*4
  • runmetal run example/pi.yaml
• rand
  • random number generator (LCG)
  • runmetal run example/rand.yaml

• pi