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update ars.py and README to reflect changes in ray 1.0. #15

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update ars.py and README to reflect changes in ray 1.0. #15

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b93de49
update ars.py and README to reflect changes in ray, gym API
sgillen Oct 12, 2020
60dccf0
another minor change for newer gym version
sgillen Sep 29, 2021
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4 changes: 2 additions & 2 deletions README.md
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Expand Up @@ -20,10 +20,10 @@ For more information on Ray see http://ray.readthedocs.io/en/latest/.
First start Ray by executing a command of the following form:

```
ray start --head --redis-port=6379 --num-workers=18
ray start --head
```
This command starts multiple Python processes on one machine for parallel computations with Ray.
Set "num_workers=X" for parallelizing ARS across X CPUs.
Set "--num_cpus=X" for parallelizing ARS across X CPUs.
For parallelzing ARS on a cluster follow the instructions here: http://ray.readthedocs.io/en/latest/using-ray-on-a-large-cluster.html.

We recommend using single threaded linear algebra computations by setting:
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6 changes: 3 additions & 3 deletions code/ars.py
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Expand Up @@ -99,7 +99,7 @@ def do_rollouts(self, w_policy, num_rollouts = 1, shift = 1, evaluate = False):

# for evaluation we do not shift the rewards (shift = 0) and we use the
# default rollout length (1000 for the MuJoCo locomotion tasks)
reward, r_steps = self.rollout(shift = 0., rollout_length = self.env.spec.timestep_limit)
reward, r_steps = self.rollout(shift = 0., rollout_length = self.env.spec.max_episode_steps)
rollout_rewards.append(reward)

else:
Expand Down Expand Up @@ -386,7 +386,7 @@ def run_ars(params):
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--env_name', type=str, default='HalfCheetah-v1')
parser.add_argument('--env_name', type=str, default='HalfCheetah-v2')
parser.add_argument('--n_iter', '-n', type=int, default=1000)
parser.add_argument('--n_directions', '-nd', type=int, default=8)
parser.add_argument('--deltas_used', '-du', type=int, default=8)
Expand All @@ -407,7 +407,7 @@ def run_ars(params):
parser.add_argument('--filter', type=str, default='MeanStdFilter')

local_ip = socket.gethostbyname(socket.gethostname())
ray.init(redis_address= local_ip + ':6379')
ray.init(address= 'auto')

args = parser.parse_args()
params = vars(args)
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