Comments (4)
Hi, thanks for your message. The parallel data collection isn't supported. Feel free to debug it if you're interested, but it's not really needed as Dreamer is data-efficient and the computational bottleneck is training the model
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Unfortunately, my environment (RLBench with vision sensor) is about 10x slower than mujoco envs. And Dreamer would spend the majority of the time on data collection.
I wasn't really able to solve the problem because there seems to be a CUDA issue when using multiprocessing in python. You could use 'spawn' as multiprocessing start method. However, this doesn't work for us because we have to pass objects which are not picklable.
In the end, I have only set the training envs to use multiprocessing and deactivatet tensorboard logging from these envs. This increases the speed of data generation and I can still log from the test env.
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Why do you need to pass objects that cannot be pickled? In case you were talking about the environment instance itself, it would be better to instantiate it directly in the separate process. There is also an implementation of a async wrapper in gym3 that might be helpful. Sorry for not being able to help more with this.
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In the current implementation, it's trying to pass a lambda function which creates the environment. Lambda functions are usually not picklable. However, this issue can be solved by using the dill package. But I still have to pass the summary writer which doesn't work. You could maybe create a new Summary writer for each process.
The async wrapper in gym3 uses only threads unfortunately. I have to use processes because of my environment.
And I have found out that it's only a problem on machines with a gpu. It works if I hide the GPU.
Thank you for trying to help me.
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Related Issues (20)
- A question about reward and observation pairing in wrapper HOT 2
- Tensorflow-probability version HOT 2
- Invalid one-hot action with Google Research football environment HOT 1
- lost of file 'dm_control' HOT 3
- difference between "CheetahRun-v0" on DM vs "half-cheetah-v2" on Mujuco HOT 1
- Spikes in Loss? HOT 2
- Runtime performance HOT 1
- Free nats over batch and time dimension? HOT 1
- Differences in free nats clipping between Dreamer, early and final PlaNet implementation HOT 2
- What is this line for? HOT 1
- How to run on short episodes? HOT 2
- slow in atari tasks HOT 2
- my.hackmit.org Can't register HOT 1
- AttributeError: 'MirroredStrategy' object has no attribute 'experimental_run_v2' HOT 1
- the code is running without any results and output HOT 5
- freenats inconsistent with tf1 repo HOT 1
- Can't reproduce results in some environments HOT 3
- Provided scores don't match the results HOT 2
- KL clipping: before or after averaging? HOT 1
- Different std of models
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