# 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
       sudo systemctl reboot


3. Setup bcache:

       sudo bash setup_bcache.sh


3. 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