A sample Docker image for using ML-Agents with GPU support for Unity.
In my other repository (https://github.com/ValerioB88/ml-agents-visual-observations-docker) I showed how to use ml-agents within a Docker container with visual observations by running a virtual frame buffer. The drawback of that approach is that Unity rendering is not exploiting the hardware capability (namely, your powerful GPU). The GPU will normally runs your neural network's computation, but if your NN has to wait for Unity to generate new frames, then the whole training time is gonna suffer. You can use this Docker image and the instructions in this repo to overcomes the issue.
- NVIDIA Drivers: On the host machine, make sure that the NVIDIA drivers are installed. To check that, run
nvidia-smi, and something like this should appear:
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 455.38 Driver Version: 455.38 CUDA Version: 11.1 |
|-------------------------------+----------------------+----------------------+
| 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 TITAN X (Pascal) Off | 00000000:01:00.0 Off | N/A |
| 23% 36C P8 16W / 250W | 52MiB / 12192MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| 0 N/A N/A 971 G /usr/lib/xorg/Xorg 49MiB |
+-----------------------------------------------------------------------------+
If it doesn't, install the NVIDIA drivers (plenty of online tutorials about that, but it should just be something like sudo ubuntu-drivers autoinstall or sudo apt install nvidia-driver-<version-number> e.g. sudo apt install nvidia-driver-430).
-
NVIDIA Container Toolkit: Check if you have it by running
sudo docker run --rm --gpus all nvidia/cuda:11.0-base nvidia-smi. If you don't, follow these instructionts https://www.server-world.info/en/note?os=Ubuntu_20.04&p=nvidia&f=2 -
Set up the xorg.config file: follow these instructions: https://virtualgl.org/Documentation/HeadlessNV. Don't worry about the VirtualGL part, but follow the points 1, 2 and 3. Be careful to leave IN the option
--use-display-device=Nonein step 2!
To check that everything is setup correctly on the host machine, open two terminals. On one of them run nvidia-smi -lms 100, on the other run export DISPLAY=:0 && glxgears -display :0. glxgears it's just a little OpenGL demo that you can easily use as a test. You should see on the nvidia terminal the GPU crunching numbers to render the glxgear script (if you don't have glxgears, install it with apt update && apt install mesa-utils). You should get something like this:
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 455.38 Driver Version: 455.38 CUDA Version: 11.1 |
|-------------------------------+----------------------+----------------------+
| 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 TITAN X (Pascal) Off | 00000000:01:00.0 Off | N/A |
| 23% 39C P0 81W / 250W | 57MiB / 12192MiB | 81% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| 0 N/A N/A 971 G /usr/lib/xorg/Xorg 51MiB |
| 0 N/A N/A 12582 G glxgears 3MiB |
+-----------------------------------------------------------------------------+
Build the Docker image with docker build --tag ml-agents-visobs-gpu .. Once done, run it with
docker run -it \
-e DISPLAY=:0 \
--volume="/tmp/.X11-unix:/tmp/.X11-unix:rw" \
--runtime=nvidia \
--entrypoint /bin/bash \
ml-agents-visobs-gpuOnce inside the terminal, you can test it with glxgears again. (You can use nvidia-smi on the host machine.) If it works, we are ready to run a Unity scene.
To test whether Unity in ml-agents is actually running on the GPU, use this script in python inside the Docker container:
import numpy as np
import time
from mlagents_envs.environment import UnityEnvironment
from mlagents_envs.registry import default_registry
env = default_registry['VisualHallway'].make()
env.reset()
behaviour_names = list(env.behavior_specs.keys())
decision_steps, terminal_steps = env.get_steps(behaviour_names[0])
behavior_name = list(env.behavior_specs)[0]
spec = env.behavior_specs[behavior_name]
a=time.time()
for i in range(100):
action = spec.create_random_action(len(decision_steps)); env.set_actions(behavior_name, action);env.step();
print(time.time() - a)If it runs without errors, you are good to go! You should see the GPU running the Unity process and crunching numbers on your nvidia-smi terminal. I got a speed-up of 2x with this configuration, compared to the xvfb trick I was using before. This is not great, but better. However, I can at least assume that the bottleneck now is not due to Unity3D rendering: it may be due to socket transfer, or to the rest of my Unity scene that is not 3D related.
Take this image and mix it up with your own. Enjoy!
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