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This site replaces the former Compute Canada documentation site, and is now being managed by the Digital Research Alliance of Canada.

Ce site remplace l'ancien site de documentation de Calcul Canada et est maintenant géré par l'Alliance de recherche numérique du Canada.

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This page or section contains obsolete information and some statements may not be valid. The technical documentation is currently being updated by our support team.

"Torch is a scientific computing framework with wide support for machine learning algorithms that puts GPUs first. It is easy to use and efficient, thanks to an easy and fast scripting language, LuaJIT, and an underlying C/CUDA implementation."

Torch has a distant relationship to PyTorch.[1] PyTorch provides a Python interface to software with similar functionality, but PyTorch is not dependent on Torch. See PyTorch for instructions on using it.

Torch depends on CUDA. In order to use Torch you must first load a CUDA module, like so:

[name@server ~]$ module load cuda torch

Installing Lua packages

Torch comes with the Lua package manager, named luarocks. Run

luarocks list

to see a list of installed packages.

If you need some package which does not appear on the list, use the following to install it in your own folder:

[name@server ~]$ luarocks install --local --deps-mode=all <package name>

If after this installation you are having trouble finding the packages at runtime, then add the following command[2] right before running "lua your_program.lua" command:

eval $(luarocks path --bin)

By experience, we often find packages that do not install well with luarocks. If you have a package that is not installed in the default module and need help installing it, please contact our Technical support.