> For the complete documentation index, see [llms.txt](https://wiki.solids.group/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.solids.group/alamo/gpu-compilation-on-nova.md).

# GPU Compilation on Nova

## Steps

1. Load the following modules:

   ```bash
   module load git openmpi cuda
   ```
2. Check out the Alamo repository:

   ```bash
   git clone https://github.com/solidsgroup/alamo.git
   ```

   For this workflow, check out the `gpu` branch:

   ```bash
   git checkout gpu
   ```
3. In the Alamo directory, configure with:

   ```bash
   ./configure --get-eigen --cuda
   ```

   The Nova `eigen` module will not work for this workflow.
4. Compile the currently working example:

   ```bash
   make bin/heat
   ```

   Optionally start an interactive compilation session to speed up the build:

   ```bash
   srun --partition=interactive --pty bash
   ```

   The modules must be reloaded inside the interactive session.

   You may need to run `make` more than once; the old wiki noted odd issues when compiling in parallel.
5. With Alamo compiled, start a new interactive session:

   ```bash
   srun --partition=interactive --gres=gpu:a100:1 --pty bash
   ```

   Load CUDA:

   ```bash
   module load cuda
   ```
6. Run:

   ```bash
   ./bin/heat-3d-cuda80-g++ tests/HeatConduction/input
   ```

   The old wiki reported that this did not work because `libcuda.so.1` could not be found. Symlinking to the `/stub` library was attempted, but the stub library could not be used.


---

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