Porting/PyTorch

Binaries

Debian

PyTorch is packaged in Debian Bookworm and works fine, except for one bug. Debian uses PyTorch 1.13 and Python 3.11; these are not mutually compatible. To patch Debian's PyTorch to work properly with Python 3.11, apply this patch to /usr/lib/python3/dist-packages/torch/distributed/_shard/sharded_tensor/metadata.py:

-    tensor_properties: TensorProperties = field(default=TensorProperties())
+    tensor_properties: TensorProperties = field(default_factory=TensorProperties)

The above patch is derived from this Lightning comment , with a bugfix applied. The code affected by the patch may or may not be triggered depending on which application you're running; Real-ESRGAN doesn't need the patch while Stable Diffusion WebUI does.

Example workflow to install PyTorch and Real-ESRGAN on Debian Bookworm ppc64le:

sudo apt install python3-torch python3-torchvision python3-opencv python3-llvmlite python3-grpcio python3-pip python3-skimage python3-numba
GRPC_PYTHON_BUILD_SYSTEM_OPENSSL=true pip3 install --user --break-system-packages basicsr facexlib gfpgan
# Log in and log out again to update $PATH to include ~/.local/bin 
git clone https://github.com/xinntao/Real-ESRGAN.git
cd Real-ESRGAN
pip3 install --user --break-system-packages -r requirements.txt
pip3 install --user --break-system-packages .
# Real-ESRGAN is now installed.

Conda

Open Cognitive Environment (Open-CE) provides distro-independent ppc64le binaries of PyTorch and related packages. Example workflow to install PyTorch and Real-ESRGAN on Fedora 38 ppc64le:

sudo dnf install python3.10
sudo dnf install conda
conda create --name pytorch python=3.10
# Close and re-open terminal
conda activate pytorch
conda install -c https://ftp.osuosl.org/pub/open-ce/current/ pytorch-cpu torchvision-cpu py-opencv
conda install -c numba llvmlite
conda install -c conda-forge grpcio
conda install -c conda-forge libstdcxx-ng
conda install pip
GRPC_PYTHON_BUILD_SYSTEM_OPENSSL=true pip install basicsr facexlib gfpgan
git clone https://github.com/xinntao/Real-ESRGAN.git
cd Real-ESRGAN
pip install -r requirements.txt
python setup.py develop
# Real-ESRGAN is now installed.

In progress

• PR #88607 breaks build for POWER9 CPU
• PyTorch Build From Source Error: ppc64le + gcc 7.3.1 + cuda 11.8 + python 3.9
• fallback to cpu_kernel for VSX
• Add missing conversion functions between half and float for ppc64le