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Add devices params to PPO learner #309

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Add devices params to PPO learner #309

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17 changes: 13 additions & 4 deletions acme/agents/jax/ppo/learning.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,8 +14,9 @@

"""Learner for the PPO agent."""

from typing import Dict, Iterator, List, NamedTuple, Optional, Tuple
from typing import Dict, Iterator, List, NamedTuple, Optional, Sequence, Tuple

from absl import logging
import acme
from acme import types
from acme.agents.jax.ppo import networks
Expand Down Expand Up @@ -103,10 +104,18 @@ def __init__(
metrics_logging_period: int = 100,
pmap_axis_name: str = 'devices',
obs_normalization_fns: Optional[normalization.NormalizationFns] = None,
devices: Optional[Sequence[jax.Device]] = None,
):
self.local_learner_devices = jax.local_devices()
self.num_local_learner_devices = jax.local_device_count()
self.learner_devices = jax.devices()
local_devices = jax.local_devices()
process_id = jax.process_index()
logging.info('Learner process id: %s. Devices passed: %s', process_id,
devices)
logging.info('Learner process id: %s. Local devices from JAX API: %s',
process_id, local_devices)
self.learner_devices = devices or jax.devices()
self.local_learner_devices = [d for d in self.learner_devices if d in local_devices]
self.num_local_learner_devices = len(self.local_learner_devices)

self.num_epochs = num_epochs
self.num_minibatches = num_minibatches
self.metrics_logging_period = metrics_logging_period
Expand Down