[RLlib] Hot fix for PPOTorchRLModule._compute_values with non-shared stateful encoder and batch slicing with non-empty infos.#44082
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sven1977 merged 1 commit intoray-project:masterfrom Mar 18, 2024
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…ompute_values' when using a non-shared stateful encoder. In addition fixed an error that occurs while slicing batches with non-empty infos. Signed-off-by: Simon Zehnder <simon.zehnder@gmail.com>
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PPOTorchRLModule._compute_values with non-shared stateful encoder and batch slicing with non-empty infosPPOTorchRLModule._compute_values with non-shared stateful encoder and batch slicing with non-empty infos.
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| # Exclude INFOs from regular array slicing as the data under this column might | ||
| # be a list (not good for `tree.map_structure` call). | ||
| infos = self.get(SampleBatch.INFOS) | ||
| # Furthermore, slicing does not work when the data in the column is |
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You mean a SampleBatch with B=0, correct?
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B>0. But in this case the infos are a list of dicts. When they are empty, tree.map_structure(infos) works, but when they are filled, tree.map_structure will fail as it tries to apply the slicing on singular values slicing fails.
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Looks good, thanks for the fix @simonsays1980!
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| # Separate vf-encoder. | ||
| if hasattr(self.encoder, "critic_encoder"): | ||
| if self.is_stateful(): |
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Awesome! Ran into this issue yesterday as well (and continued testing then with a shared value function :) ).
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Why are these changes needed?
Running
PPOwithuse_lstm=Trueandvf_share_layers=Falseresults in an error in thePPOTorchRLModule._compute_valuesmethod as the specs checker expects a different spec for thestate_in:Exctracting the
state_infor thecriticsolves this problem.Another problem is solved related to non-empty infos in batch slicing (mainly occuring in
MinibatchIterators). The reason is that slicing viatree.map_structuretries to slice also the entries of theinfos which are usually singular values:Related issue number
Checks
git commit -s) in this PR.scripts/format.shto lint the changes in this PR.method in Tune, I've added it in
doc/source/tune/api/under thecorresponding
.rstfile.