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- """
- Example of a fully deterministic, repeatable RLlib train run using
- the "seed" config key.
- """
- import argparse
- import ray
- from ray import tune
- from ray.rllib.examples.env.env_using_remote_actor import \
- CartPoleWithRemoteParamServer, ParameterStorage
- from ray.rllib.policy.sample_batch import DEFAULT_POLICY_ID
- from ray.rllib.utils.metrics.learner_info import LEARNER_INFO
- from ray.rllib.utils.test_utils import check
- parser = argparse.ArgumentParser()
- parser.add_argument("--run", type=str, default="PPO")
- parser.add_argument(
- "--framework", choices=["tf2", "tf", "tfe", "torch"], default="tf")
- parser.add_argument("--seed", type=int, default=42)
- parser.add_argument("--as-test", action="store_true")
- parser.add_argument("--stop-iters", type=int, default=2)
- parser.add_argument("--num-gpus-trainer", type=float, default=0)
- parser.add_argument("--num-gpus-per-worker", type=float, default=0)
- if __name__ == "__main__":
- args = parser.parse_args()
- param_storage = ParameterStorage.options(name="param-server").remote()
- config = {
- "env": CartPoleWithRemoteParamServer,
- "env_config": {
- "param_server": "param-server",
- },
- # Use GPUs iff `RLLIB_NUM_GPUS` env var set to > 0.
- "num_gpus": args.num_gpus_trainer,
- "num_workers": 1, # parallelism
- "num_gpus_per_worker": args.num_gpus_per_worker,
- "num_envs_per_worker": 2,
- "framework": args.framework,
- # Make sure every environment gets a fixed seed.
- "seed": args.seed,
- # Simplify to run this example script faster.
- "train_batch_size": 100,
- "sgd_minibatch_size": 10,
- "num_sgd_iter": 5,
- "rollout_fragment_length": 50,
- }
- stop = {
- "training_iteration": args.stop_iters,
- }
- results1 = tune.run(args.run, config=config, stop=stop, verbose=1)
- results2 = tune.run(args.run, config=config, stop=stop, verbose=1)
- if args.as_test:
- results1 = list(results1.results.values())[0]
- results2 = list(results2.results.values())[0]
- # Test rollout behavior.
- check(results1["hist_stats"], results2["hist_stats"])
- # As well as training behavior (minibatch sequence during SGD
- # iterations).
- check(
- results1["info"][LEARNER_INFO][DEFAULT_POLICY_ID]["learner_stats"],
- results2["info"][LEARNER_INFO][DEFAULT_POLICY_ID]["learner_stats"])
- ray.shutdown()
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