# HPC Python - Numba ## Pelle https://uppmax.github.io/HPC-python/day4/gpu.html#numba-example ```bash salloc -A uppmax2025-2-393 -t 00:30:00 -n 2 -p gpu --gpus=l40s:1 ``` ## Build [Numba+CUDA build instructions](https://nvidia.github.io/numba-cuda/user/installation.html#numba-cuda-installation) ```bash module load Python/3.13.5 foss/2025b CUDA/13.0.2 python3 -m venv numba-gpu source numba-gpu/bin/activate pip3 install --upgrade pip setuptools wheel pip3 install numba-cuda[cu13] numpy ``` ## Exercises ```bash $ module load Python/3.13.5 foss/2025b CUDA/13.0.2 $ source /sw/arch/local/software/python/venvs/numba-gpu/bin/activate $ python add-list.py CPU function took 17.475140 seconds. GPU function took 0.134774 seconds. $ python integration2d_gpu.py Integral value is 3.783339e-08, Error is 3.783339e-08 Time spent: 1.02 sec $ python integration2d_gpu_shared.py Integral value is -2.094257e-08, Error is 2.094257e-08 Time spent: 1.03 sec ```