# Learning Riva

## Setup Pre-reqs

Get NGC setup with `ngc-cli` or `docker`. After logging into https://ngc.nvidia.com/ go to Profile > Setup to get the cli and API KEY. On my Orin I installed the ngc-cli to /opt/nvida/ngc-cli with a symlink into /usr/local/bin.

Or with docker:

```
docker login nvcr.io

Username: $oauthtoken
Password: YOUR API KEY
```

## Nvidia Docker on Ubuntu 22.04


We need the Nvidia container toolkit for GPU docker integration. [The Docker Utility Engine for NVIDIA GPUs](https://docs.nvidia.com/ai-enterprise/deployment-guide/dg-docker.html) install the nvidia-container-toolkit. This should allow you to run a sample gpu enabled container like:

First check you Cuda driver using `nvidia-smi` on the host, then check the docker environment:

```
docker run --rm --gpus all nvidia/cuda:11.0.3-base-ubuntu20.04 nvidia-smi
```

This resulted in an error because I didn't have cuda drivers installed. See next if this is the case for you.

### Nvidia Driver Installation 

Since I didn't have an `nvida-smi` binary I didn't have the Nvidia Driver installed for use with Cuda.

Following the Quickstart guide for nvidia driver install https://docs.nvidia.com/datacenter/tesla/tesla-installation-notes/index.html#ubuntu-lts. I had some conflicts, which simply required updating `nvidia-kernel-source-515` and `nvidia-kernel-common-515`.

I could then:

```
sudo apt-get -y install cuda-drivers
```

Which required a reboot:

```
...
A modprobe blacklist file has been created at /etc/modprobe.d to prevent Nouveau
from loading. This can be reverted by deleting the following file:
/etc/modprobe.d/nvidia-graphics-drivers.conf

A new initrd image has also been created. To revert, please regenerate your
initrd by running the following command after deleting the modprobe.d file:
`/usr/sbin/initramfs -u`

*****************************************************************************
*** Reboot your computer and verify that the NVIDIA graphics driver can   ***
*** be loaded.                                                            ***
*********************
...
```

After reboot `nvidia-smi` displays the cuda driver info

```
un Nov 13 10:54:34 2022       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 520.61.05    Driver Version: 520.61.05    CUDA Version: 11.8     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA GeForce ...  On   | 00000000:09:00.0  On |                  N/A |
| 35%   36C    P8    21W / 350W |    594MiB / 12288MiB |      2%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|    0   N/A  N/A      2077      G   /usr/lib/xorg/Xorg                316MiB |
|    0   N/A  N/A      2336      G   /usr/bin/gnome-shell              145MiB |
|    0   N/A  N/A      3432      G   ...7/usr/lib/firefox/firefox      131MiB |
+-----------------------------------------------------------------------------+
```

I can also see I can run the Docker Container now:

```
docker run --rm --gpus all nvidia/cuda:11.0.3-base-ubuntu20.04 nvidia-smi

Sun Nov 13 15:55:57 2022       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 520.61.05    Driver Version: 520.61.05    CUDA Version: 11.8     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA GeForce ...  On   | 00000000:09:00.0  On |                  N/A |
|  0%   36C    P8    19W / 350W |    593MiB / 12288MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
+-----------------------------------------------------------------------------+
```

### Additional Audio Testing

I downloaded the Audacity tool which comes as an AppImage. This requires the [FUSE (Filesystem in user space)](https://github.com/AppImage/AppImageKit/wiki/FUSE) setup which is installable from the universe repo with:

```
sudo apt install libfuse2
```

## Actual Riva Setup

Following the quick-start guide https://resources.nvidia.com/en-us-riva-asr-briefcase/quick-start-guide directed me to the AMD64 or ARM64 utility scripts )https://catalog.ngc.nvidia.com/orgs/nvidia/teams/riva/resources/riva_quickstart/files?version=2.7.0. Using the Download and CLI option

```
ngc registry resource download-version "nvidia/riva/riva_quickstart:2.7.0"
```

This downloads the quickstart scripts to my local directory. I have excluded these from this repo since they are version and platform dependent. I was content with the default settings of the `config.sh`, so I simply