# Setup for Tensorflow with GPU

Tested for ubuntu-20.04.4

Steps:

1. Prepare setup:

       git clone https://repos.nonan.net/nicolas/gpu_server_setup.git
       cd gpu_server_setup


2. Setup driver/CUDA:

       sudo bash setup_cuda.sh


3. Reboot system:

       sudo systemctl reboot


4. Setup bcache:

       sudo bash setup_bcache.sh


5. Setup apps (Python, JupyterHub (Hub is running as root), Tensorflow etc.):

       sudo bash setup_apps.sh


## Notes

### CUDA

Check state of NVIDIA devices (electrical power, temperature, memory etc.):

    nvidia-smi


### bcache

Check bcache performance:

    cat /sys/block/bcache0/bcache/state
    cat /sys/block/bcache*/bcache/stats_five_minute/cache_hit_ratio
    cat /sys/block/bcache*/bcache/stats_hour/cache_hit_ratio


Tune bcache (not permanent):

    echo 64M > /sys/block/bcache0/bcache/sequential_cutoff
    echo 4096 > /sys/block/bcache0/queue/read_ahead_kb

### Fan-temperature control for GPUs
- [NVIDIA GPU-based FAN controller for SUPERMICRO server](https://github.com/skokec/superfans-gpu-controller)
- [Modification for combined GPU/CPU temperature control in 1U server](https://repos.nonan.net/nicolas/superfans-gpu-controller)

## For a multiuser setup
- [systemdspawner](https://github.com/jupyterhub/systemdspawner) alow for mem_limit