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def _initialize(self):
"""Initialize collector worker thread, Log path will be checked first.
Records in DB backend will be cleared.
"""
if not os.path.exists(self._logdir):
raise CollectorError("Log directory %s not exists" % self._logdir)
self.logger.info("Collect... |
def sync_job_info(self, job_name):
"""Load information of the job with the given job name.
1. Traverse each experiment sub-directory and sync information
for each trial.
2. Create or update the job information, together with the job
meta file.
Args:
jo... |
def sync_trial_info(self, job_path, expr_dir_name):
"""Load information of the trial from the given experiment directory.
Create or update the trial information, together with the trial
meta file.
Args:
job_path(str)
expr_dir_name(str)
"""
expr_... |
def _create_job_info(self, job_dir):
"""Create information for given job.
Meta file will be loaded if exists, and the job information will
be saved in db backend.
Args:
job_dir (str): Directory path of the job.
"""
meta = self._build_job_meta(job_dir)
... |
def _update_job_info(cls, job_dir):
"""Update information for given job.
Meta file will be loaded if exists, and the job information in
in db backend will be updated.
Args:
job_dir (str): Directory path of the job.
Return:
Updated dict of job meta info
... |
def _create_trial_info(self, expr_dir):
"""Create information for given trial.
Meta file will be loaded if exists, and the trial information
will be saved in db backend.
Args:
expr_dir (str): Directory path of the experiment.
"""
meta = self._build_trial_met... |
def _update_trial_info(self, expr_dir):
"""Update information for given trial.
Meta file will be loaded if exists, and the trial information
in db backend will be updated.
Args:
expr_dir(str)
"""
trial_id = expr_dir[-8:]
meta_file = os.path.join(exp... |
def _build_job_meta(cls, job_dir):
"""Build meta file for job.
Args:
job_dir (str): Directory path of the job.
Return:
A dict of job meta info.
"""
meta_file = os.path.join(job_dir, JOB_META_FILE)
meta = parse_json(meta_file)
if not meta... |
def _build_trial_meta(cls, expr_dir):
"""Build meta file for trial.
Args:
expr_dir (str): Directory path of the experiment.
Return:
A dict of trial meta info.
"""
meta_file = os.path.join(expr_dir, EXPR_META_FILE)
meta = parse_json(meta_file)
... |
def _add_results(self, results, trial_id):
"""Add a list of results into db.
Args:
results (list): A list of json results.
trial_id (str): Id of the trial.
"""
for result in results:
self.logger.debug("Appending result: %s" % result)
resul... |
def add_time_dimension(padded_inputs, seq_lens):
"""Adds a time dimension to padded inputs.
Arguments:
padded_inputs (Tensor): a padded batch of sequences. That is,
for seq_lens=[1, 2, 2], then inputs=[A, *, B, B, C, C], where
A, B, C are sequence elements and * denotes padding.... |
def chop_into_sequences(episode_ids,
unroll_ids,
agent_indices,
feature_columns,
state_columns,
max_seq_len,
dynamic_max=True,
_extra_padding=0):
""... |
def explore(config, mutations, resample_probability, custom_explore_fn):
"""Return a config perturbed as specified.
Args:
config (dict): Original hyperparameter configuration.
mutations (dict): Specification of mutations to perform as documented
in the PopulationBasedTraining schedu... |
def make_experiment_tag(orig_tag, config, mutations):
"""Appends perturbed params to the trial name to show in the console."""
resolved_vars = {}
for k in mutations.keys():
resolved_vars[("config", k)] = config[k]
return "{}@perturbed[{}]".format(orig_tag, format_vars(resolved_vars)) |
def _log_config_on_step(self, trial_state, new_state, trial,
trial_to_clone, new_config):
"""Logs transition during exploit/exploit step.
For each step, logs: [target trial tag, clone trial tag, target trial
iteration, clone trial iteration, old config, new config].
... |
def _exploit(self, trial_executor, trial, trial_to_clone):
"""Transfers perturbed state from trial_to_clone -> trial.
If specified, also logs the updated hyperparam state."""
trial_state = self._trial_state[trial]
new_state = self._trial_state[trial_to_clone]
if not new_state.l... |
def _quantiles(self):
"""Returns trials in the lower and upper `quantile` of the population.
If there is not enough data to compute this, returns empty lists."""
trials = []
for trial, state in self._trial_state.items():
if state.last_score is not None and not trial.is_fini... |
def choose_trial_to_run(self, trial_runner):
"""Ensures all trials get fair share of time (as defined by time_attr).
This enables the PBT scheduler to support a greater number of
concurrent trials than can fit in the cluster at any given time.
"""
candidates = []
for tr... |
def key_pair(i, region):
"""Returns the ith default (aws_key_pair_name, key_pair_path)."""
if i == 0:
return ("{}_{}".format(RAY, region),
os.path.expanduser("~/.ssh/{}_{}.pem".format(RAY, region)))
return ("{}_{}_{}".format(RAY, i, region),
os.path.expanduser("~/.ssh/{}_... |
def _build_layers(self, inputs, num_outputs, options):
"""Process the flattened inputs.
Note that dict inputs will be flattened into a vector. To define a
model that processes the components separately, use _build_layers_v2().
"""
hiddens = options.get("fcnet_hiddens")
... |
def with_base_config(base_config, extra_config):
"""Returns the given config dict merged with a base agent conf."""
config = copy.deepcopy(base_config)
config.update(extra_config)
return config |
def get_agent_class(alg):
"""Returns the class of a known agent given its name."""
try:
return _get_agent_class(alg)
except ImportError:
from ray.rllib.agents.mock import _agent_import_failed
return _agent_import_failed(traceback.format_exc()) |
def determine_ip_address():
"""Return the first IP address for an ethernet interface on the system."""
addrs = [
x.address for k, v in psutil.net_if_addrs().items() if k[0] == "e"
for x in v if x.family == AddressFamily.AF_INET
]
return addrs[0] |
def perform_iteration(self):
"""Get any changes to the log files and push updates to Redis."""
stats = self.get_all_stats()
self.redis_client.publish(
self.redis_key,
jsonify_asdict(stats),
) |
def run(self):
"""Run the reporter."""
while True:
try:
self.perform_iteration()
except Exception:
traceback.print_exc()
pass
time.sleep(ray_constants.REPORTER_UPDATE_INTERVAL_MS / 1000) |
def check_serializable(cls):
"""Throws an exception if Ray cannot serialize this class efficiently.
Args:
cls (type): The class to be serialized.
Raises:
Exception: An exception is raised if Ray cannot serialize this class
efficiently.
"""
if is_named_tuple(cls):
... |
def is_named_tuple(cls):
"""Return True if cls is a namedtuple and False otherwise."""
b = cls.__bases__
if len(b) != 1 or b[0] != tuple:
return False
f = getattr(cls, "_fields", None)
if not isinstance(f, tuple):
return False
return all(type(n) == str for n in f) |
def register_trainable(name, trainable):
"""Register a trainable function or class.
Args:
name (str): Name to register.
trainable (obj): Function or tune.Trainable class. Functions must
take (config, status_reporter) as arguments and will be
automatically converted into ... |
def register_env(name, env_creator):
"""Register a custom environment for use with RLlib.
Args:
name (str): Name to register.
env_creator (obj): Function that creates an env.
"""
if not isinstance(env_creator, FunctionType):
raise TypeError("Second argument must be a function."... |
def get_learner_stats(grad_info):
"""Return optimization stats reported from the policy graph.
Example:
>>> grad_info = evaluator.learn_on_batch(samples)
>>> print(get_stats(grad_info))
{"vf_loss": ..., "policy_loss": ...}
"""
if LEARNER_STATS_KEY in grad_info:
return g... |
def collect_metrics(local_evaluator=None,
remote_evaluators=[],
timeout_seconds=180):
"""Gathers episode metrics from PolicyEvaluator instances."""
episodes, num_dropped = collect_episodes(
local_evaluator, remote_evaluators, timeout_seconds=timeout_seconds)
... |
def collect_episodes(local_evaluator=None,
remote_evaluators=[],
timeout_seconds=180):
"""Gathers new episodes metrics tuples from the given evaluators."""
pending = [
a.apply.remote(lambda ev: ev.get_metrics()) for a in remote_evaluators
]
collected, _... |
def summarize_episodes(episodes, new_episodes, num_dropped):
"""Summarizes a set of episode metrics tuples.
Arguments:
episodes: smoothed set of episodes including historical ones
new_episodes: just the new episodes in this iteration
num_dropped: number of workers haven't returned their... |
def _partition(episodes):
"""Divides metrics data into true rollouts vs off-policy estimates."""
from ray.rllib.evaluation.sampler import RolloutMetrics
rollouts, estimates = [], []
for e in episodes:
if isinstance(e, RolloutMetrics):
rollouts.append(e)
elif isinstance(e, O... |
def set_status(self, trial, status):
"""Sets status and checkpoints metadata if needed.
Only checkpoints metadata if trial status is a terminal condition.
PENDING, PAUSED, and RUNNING switches have checkpoints taken care of
in the TrialRunner.
Args:
trial (Trial): T... |
def try_checkpoint_metadata(self, trial):
"""Checkpoints metadata.
Args:
trial (Trial): Trial to checkpoint.
"""
if trial._checkpoint.storage == Checkpoint.MEMORY:
logger.debug("Not saving data for trial w/ memory checkpoint.")
return
try:
... |
def pause_trial(self, trial):
"""Pauses the trial.
We want to release resources (specifically GPUs) when pausing an
experiment. This results in PAUSED state that similar to TERMINATED.
"""
assert trial.status == Trial.RUNNING, trial.status
try:
self.save(tria... |
def unpause_trial(self, trial):
"""Sets PAUSED trial to pending to allow scheduler to start."""
assert trial.status == Trial.PAUSED, trial.status
self.set_status(trial, Trial.PENDING) |
def resume_trial(self, trial):
"""Resumes PAUSED trials. This is a blocking call."""
assert trial.status == Trial.PAUSED, trial.status
self.start_trial(trial) |
def on_trial_complete(self,
trial_id,
result=None,
error=False,
early_terminated=False):
"""Passes the result to Nevergrad unless early terminated or errored.
The result is internally negated when in... |
def start(self):
"""Start the import thread."""
self.t = threading.Thread(target=self._run, name="ray_import_thread")
# Making the thread a daemon causes it to exit
# when the main thread exits.
self.t.daemon = True
self.t.start() |
def _process_key(self, key):
"""Process the given export key from redis."""
# Handle the driver case first.
if self.mode != ray.WORKER_MODE:
if key.startswith(b"FunctionsToRun"):
with profiling.profile("fetch_and_run_function"):
self.fetch_and_exec... |
def fetch_and_execute_function_to_run(self, key):
"""Run on arbitrary function on the worker."""
(driver_id, serialized_function,
run_on_other_drivers) = self.redis_client.hmget(
key, ["driver_id", "function", "run_on_other_drivers"])
if (utils.decode(run_on_other_drivers)... |
def clip_action(action, space):
"""Called to clip actions to the specified range of this policy.
Arguments:
action: Single action.
space: Action space the actions should be present in.
Returns:
Clipped batch of actions.
"""
if isinstance(space, gym.spaces.Box):
ret... |
def on_trial_complete(self,
trial_id,
result=None,
error=False,
early_terminated=False):
"""Passes the result to skopt unless early terminated or errored.
The result is internally negated when intera... |
def address_to_ip(address):
"""Convert a hostname to a numerical IP addresses in an address.
This should be a no-op if address already contains an actual numerical IP
address.
Args:
address: This can be either a string containing a hostname (or an IP
address) and a port or it can b... |
def get_node_ip_address(address="8.8.8.8:53"):
"""Determine the IP address of the local node.
Args:
address (str): The IP address and port of any known live service on the
network you care about.
Returns:
The IP address of the current node.
"""
ip_address, port = addres... |
def create_redis_client(redis_address, password=None):
"""Create a Redis client.
Args:
The IP address, port, and password of the Redis server.
Returns:
A Redis client.
"""
redis_ip_address, redis_port = redis_address.split(":")
# For this command to work, some other client (on ... |
def start_ray_process(command,
process_type,
env_updates=None,
cwd=None,
use_valgrind=False,
use_gdb=False,
use_valgrind_profiler=False,
use_perftools_profiler=False,... |
def wait_for_redis_to_start(redis_ip_address,
redis_port,
password=None,
num_retries=5):
"""Wait for a Redis server to be available.
This is accomplished by creating a Redis client and sending a random
command to the server... |
def _autodetect_num_gpus():
"""Attempt to detect the number of GPUs on this machine.
TODO(rkn): This currently assumes Nvidia GPUs and Linux.
Returns:
The number of GPUs if any were detected, otherwise 0.
"""
proc_gpus_path = "/proc/driver/nvidia/gpus"
if os.path.isdir(proc_gpus_path):... |
def _compute_version_info():
"""Compute the versions of Python, pyarrow, and Ray.
Returns:
A tuple containing the version information.
"""
ray_version = ray.__version__
python_version = ".".join(map(str, sys.version_info[:3]))
pyarrow_version = pyarrow.__version__
return ray_version... |
def check_version_info(redis_client):
"""Check if various version info of this process is correct.
This will be used to detect if workers or drivers are started using
different versions of Python, pyarrow, or Ray. If the version
information is not present in Redis, then no check is done.
Args:
... |
def start_redis(node_ip_address,
redirect_files,
port=None,
redis_shard_ports=None,
num_redis_shards=1,
redis_max_clients=None,
redirect_worker_output=False,
password=None,
use_credis=None,
... |
def _start_redis_instance(executable,
modules,
port=None,
redis_max_clients=None,
num_retries=20,
stdout_file=None,
stderr_file=None,
pass... |
def start_log_monitor(redis_address,
logs_dir,
stdout_file=None,
stderr_file=None,
redis_password=None):
"""Start a log monitor process.
Args:
redis_address (str): The address of the Redis instance.
logs_dir... |
def start_reporter(redis_address,
stdout_file=None,
stderr_file=None,
redis_password=None):
"""Start a reporter process.
Args:
redis_address (str): The address of the Redis instance.
stdout_file: A file handle opened for writing to redire... |
def start_dashboard(redis_address,
temp_dir,
stdout_file=None,
stderr_file=None,
redis_password=None):
"""Start a dashboard process.
Args:
redis_address (str): The address of the Redis instance.
temp_dir (str): The ... |
def check_and_update_resources(num_cpus, num_gpus, resources):
"""Sanity check a resource dictionary and add sensible defaults.
Args:
num_cpus: The number of CPUs.
num_gpus: The number of GPUs.
resources: A dictionary mapping resource names to resource quantities.
Returns:
... |
def start_raylet(redis_address,
node_ip_address,
raylet_name,
plasma_store_name,
worker_path,
temp_dir,
num_cpus=None,
num_gpus=None,
resources=None,
object_manager_po... |
def build_java_worker_command(
java_worker_options,
redis_address,
plasma_store_name,
raylet_name,
redis_password,
temp_dir,
):
"""This method assembles the command used to start a Java worker.
Args:
java_worker_options (str): The command options for Java... |
def determine_plasma_store_config(object_store_memory=None,
plasma_directory=None,
huge_pages=False):
"""Figure out how to configure the plasma object store.
This will determine which directory to use for the plasma store (e.g.,
/tmp or /d... |
def _start_plasma_store(plasma_store_memory,
use_valgrind=False,
use_profiler=False,
stdout_file=None,
stderr_file=None,
plasma_directory=None,
huge_pages=False,
... |
def start_plasma_store(stdout_file=None,
stderr_file=None,
object_store_memory=None,
plasma_directory=None,
huge_pages=False,
plasma_store_socket_name=None):
"""This method starts an object store proce... |
def start_worker(node_ip_address,
object_store_name,
raylet_name,
redis_address,
worker_path,
temp_dir,
stdout_file=None,
stderr_file=None):
"""This method starts a worker process.
Args:
... |
def start_monitor(redis_address,
stdout_file=None,
stderr_file=None,
autoscaling_config=None,
redis_password=None):
"""Run a process to monitor the other processes.
Args:
redis_address (str): The address that the Redis server is li... |
def start_raylet_monitor(redis_address,
stdout_file=None,
stderr_file=None,
redis_password=None,
config=None):
"""Run a process to monitor the other processes.
Args:
redis_address (str): The address that... |
def restore_original_dimensions(obs, obs_space, tensorlib=tf):
"""Unpacks Dict and Tuple space observations into their original form.
This is needed since we flatten Dict and Tuple observations in transit.
Before sending them to the model though, we should unflatten them into
Dicts or Tuples of tensors... |
def _unpack_obs(obs, space, tensorlib=tf):
"""Unpack a flattened Dict or Tuple observation array/tensor.
Arguments:
obs: The flattened observation tensor
space: The original space prior to flattening
tensorlib: The library used to unflatten (reshape) the array/tensor
"""
if (is... |
def to_aws_format(tags):
"""Convert the Ray node name tag to the AWS-specific 'Name' tag."""
if TAG_RAY_NODE_NAME in tags:
tags["Name"] = tags[TAG_RAY_NODE_NAME]
del tags[TAG_RAY_NODE_NAME]
return tags |
def _node_tag_update_loop(self):
""" Update the AWS tags for a cluster periodically.
The purpose of this loop is to avoid excessive EC2 calls when a large
number of nodes are being launched simultaneously.
"""
while True:
self.tag_cache_update_event.wait()
... |
def _get_node(self, node_id):
"""Refresh and get info for this node, updating the cache."""
self.non_terminated_nodes({}) # Side effect: updates cache
if node_id in self.cached_nodes:
return self.cached_nodes[node_id]
# Node not in {pending, running} -- retry with a point ... |
def validate(export_formats):
"""Validates export_formats.
Raises:
ValueError if the format is unknown.
"""
for i in range(len(export_formats)):
export_formats[i] = export_formats[i].strip().lower()
if export_formats[i] not in [
Ex... |
def init_logger(self):
"""Init logger."""
if not self.result_logger:
if not os.path.exists(self.local_dir):
os.makedirs(self.local_dir)
if not self.logdir:
self.logdir = tempfile.mkdtemp(
prefix="{}_{}".format(
... |
def update_resources(self, cpu, gpu, **kwargs):
"""EXPERIMENTAL: Updates the resource requirements.
Should only be called when the trial is not running.
Raises:
ValueError if trial status is running.
"""
if self.status is Trial.RUNNING:
raise ValueError(... |
def should_stop(self, result):
"""Whether the given result meets this trial's stopping criteria."""
if result.get(DONE):
return True
for criteria, stop_value in self.stopping_criterion.items():
if criteria not in result:
raise TuneError(
... |
def should_checkpoint(self):
"""Whether this trial is due for checkpointing."""
result = self.last_result or {}
if result.get(DONE) and self.checkpoint_at_end:
return True
if self.checkpoint_freq:
return result.get(TRAINING_ITERATION,
... |
def progress_string(self):
"""Returns a progress message for printing out to the console."""
if not self.last_result:
return self._status_string()
def location_string(hostname, pid):
if hostname == os.uname()[1]:
return "pid={}".format(pid)
e... |
def should_recover(self):
"""Returns whether the trial qualifies for restoring.
This is if a checkpoint frequency is set and has not failed more than
max_failures. This may return true even when there may not yet
be a checkpoint.
"""
return (self.checkpoint_freq > 0
... |
def compare_checkpoints(self, attr_mean):
"""Compares two checkpoints based on the attribute attr_mean param.
Greater than is used by default. If command-line parameter
checkpoint_score_attr starts with "min-" less than is used.
Arguments:
attr_mean: mean of attribute value... |
def preprocess(img):
"""Preprocess 210x160x3 uint8 frame into 6400 (80x80) 1D float vector."""
# Crop the image.
img = img[35:195]
# Downsample by factor of 2.
img = img[::2, ::2, 0]
# Erase background (background type 1).
img[img == 144] = 0
# Erase background (background type 2).
i... |
def discount_rewards(r):
"""take 1D float array of rewards and compute discounted reward"""
discounted_r = np.zeros_like(r)
running_add = 0
for t in reversed(range(0, r.size)):
# Reset the sum, since this was a game boundary (pong specific!).
if r[t] != 0:
running_add = 0
... |
def policy_backward(eph, epx, epdlogp, model):
"""backward pass. (eph is array of intermediate hidden states)"""
dW2 = np.dot(eph.T, epdlogp).ravel()
dh = np.outer(epdlogp, model["W2"])
# Backprop relu.
dh[eph <= 0] = 0
dW1 = np.dot(dh.T, epx)
return {"W1": dW1, "W2": dW2} |
def load_class(path):
"""
Load a class at runtime given a full path.
Example of the path: mypkg.mysubpkg.myclass
"""
class_data = path.split(".")
if len(class_data) < 2:
raise ValueError(
"You need to pass a valid path like mymodule.provider_class")
module_path = ".".joi... |
def terminate_nodes(self, node_ids):
"""Terminates a set of nodes. May be overridden with a batch method."""
for node_id in node_ids:
logger.info("NodeProvider: "
"{}: Terminating node".format(node_id))
self.terminate_node(node_id) |
def on_trial_complete(self,
trial_id,
result=None,
error=False,
early_terminated=False):
"""Passes the result to BayesOpt unless early terminated or errored"""
if result:
self.optimizer.re... |
def _execute_and_seal_error(method, arg, method_name):
"""Execute method with arg and return the result.
If the method fails, return a RayTaskError so it can be sealed in the
resultOID and retried by user.
"""
try:
return method(arg)
except Exception:
return ray.worker.RayTaskEr... |
def _dispatch(self, input_batch: List[SingleQuery]):
"""Helper method to dispatch a batch of input to self.serve_method."""
method = getattr(self, self.serve_method)
if hasattr(method, "ray_serve_batched_input"):
batch = [inp.data for inp in input_batch]
result = _execute... |
def get_wrapper_by_cls(env, cls):
"""Returns the gym env wrapper of the given class, or None."""
currentenv = env
while True:
if isinstance(currentenv, cls):
return currentenv
elif isinstance(currentenv, gym.Wrapper):
currentenv = currentenv.env
else:
... |
def wrap_deepmind(env, dim=84, framestack=True):
"""Configure environment for DeepMind-style Atari.
Note that we assume reward clipping is done outside the wrapper.
Args:
dim (int): Dimension to resize observations to (dim x dim).
framestack (bool): Whether to framestack observations.
... |
def valid_padding(in_size, filter_size, stride_size):
"""Note: Padding is added to match TF conv2d `same` padding. See
www.tensorflow.org/versions/r0.12/api_docs/python/nn/convolution
Params:
in_size (tuple): Rows (Height), Column (Width) for input
stride_size (tuple): Rows (Height), Column... |
def ray_get_and_free(object_ids):
"""Call ray.get and then queue the object ids for deletion.
This function should be used whenever possible in RLlib, to optimize
memory usage. The only exception is when an object_id is shared among
multiple readers.
Args:
object_ids (ObjectID|List[ObjectI... |
def aligned_array(size, dtype, align=64):
"""Returns an array of a given size that is 64-byte aligned.
The returned array can be efficiently copied into GPU memory by TensorFlow.
"""
n = size * dtype.itemsize
empty = np.empty(n + (align - 1), dtype=np.uint8)
data_align = empty.ctypes.data % al... |
def concat_aligned(items):
"""Concatenate arrays, ensuring the output is 64-byte aligned.
We only align float arrays; other arrays are concatenated as normal.
This should be used instead of np.concatenate() to improve performance
when the output array is likely to be fed into TensorFlow.
"""
... |
def put(self, item, block=True, timeout=None):
"""Adds an item to the queue.
Uses polling if block=True, so there is no guarantee of order if
multiple producers put to the same full queue.
Raises:
Full if the queue is full and blocking is False.
"""
if self.... |
def get(self, block=True, timeout=None):
"""Gets an item from the queue.
Uses polling if block=True, so there is no guarantee of order if
multiple consumers get from the same empty queue.
Returns:
The next item in the queue.
Raises:
Empty if the queue i... |
def override(cls):
"""Annotation for documenting method overrides.
Arguments:
cls (type): The superclass that provides the overriden method. If this
cls does not actually have the method, an error is raised.
"""
def check_override(method):
if method.__name__ not in dir(cls)... |
def on_trial_add(self, trial_runner, trial):
"""Adds new trial.
On a new trial add, if current bracket is not filled,
add to current bracket. Else, if current band is not filled,
create new bracket, add to current bracket.
Else, create new iteration, create new bracket, add to b... |
def _cur_band_filled(self):
"""Checks if the current band is filled.
The size of the current band should be equal to s_max_1"""
cur_band = self._hyperbands[self._state["band_idx"]]
return len(cur_band) == self._s_max_1 |
def on_trial_result(self, trial_runner, trial, result):
"""If bracket is finished, all trials will be stopped.
If a given trial finishes and bracket iteration is not done,
the trial will be paused and resources will be given up.
This scheduler will not start trials but will stop trials... |
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