mirror of
https://github.com/vale981/ray
synced 2025-03-06 10:31:39 -05:00
103 lines
3.2 KiB
Python
103 lines
3.2 KiB
Python
import logging
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import os
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import time
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from ray.util.debug import log_once
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from ray.rllib.utils.framework import try_import_tf
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tf1, tf, tfv = try_import_tf()
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logger = logging.getLogger(__name__)
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class TFRunBuilder:
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"""Used to incrementally build up a TensorFlow run.
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This is particularly useful for batching ops from multiple different
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policies in the multi-agent setting.
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"""
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def __init__(self, session, debug_name):
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self.session = session
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self.debug_name = debug_name
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self.feed_dict = {}
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self.fetches = []
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self._executed = None
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def add_feed_dict(self, feed_dict):
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assert not self._executed
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for k in feed_dict:
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if k in self.feed_dict:
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raise ValueError("Key added twice: {}".format(k))
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self.feed_dict.update(feed_dict)
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def add_fetches(self, fetches):
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assert not self._executed
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base_index = len(self.fetches)
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self.fetches.extend(fetches)
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return list(range(base_index, len(self.fetches)))
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def get(self, to_fetch):
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if self._executed is None:
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try:
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self._executed = run_timeline(
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self.session,
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self.fetches,
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self.debug_name,
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self.feed_dict,
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os.environ.get("TF_TIMELINE_DIR"),
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)
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except Exception as e:
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logger.exception(
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"Error fetching: {}, feed_dict={}".format(
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self.fetches, self.feed_dict
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)
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)
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raise e
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if isinstance(to_fetch, int):
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return self._executed[to_fetch]
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elif isinstance(to_fetch, list):
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return [self.get(x) for x in to_fetch]
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elif isinstance(to_fetch, tuple):
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return tuple(self.get(x) for x in to_fetch)
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else:
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raise ValueError("Unsupported fetch type: {}".format(to_fetch))
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_count = 0
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def run_timeline(sess, ops, debug_name, feed_dict=None, timeline_dir=None):
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if feed_dict is None:
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feed_dict = {}
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if timeline_dir:
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from tensorflow.python.client import timeline
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run_options = tf1.RunOptions(trace_level=tf.RunOptions.FULL_TRACE)
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run_metadata = tf1.RunMetadata()
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start = time.time()
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fetches = sess.run(
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ops, options=run_options, run_metadata=run_metadata, feed_dict=feed_dict
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)
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trace = timeline.Timeline(step_stats=run_metadata.step_stats)
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global _count
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outf = os.path.join(
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timeline_dir,
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"timeline-{}-{}-{}.json".format(debug_name, os.getpid(), _count % 10),
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)
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_count += 1
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trace_file = open(outf, "w")
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logger.info(
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"Wrote tf timeline ({} s) to {}".format(
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time.time() - start, os.path.abspath(outf)
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)
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)
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trace_file.write(trace.generate_chrome_trace_format())
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else:
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if log_once("tf_timeline"):
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logger.info(
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"Executing TF run without tracing. To dump TF timeline traces "
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"to disk, set the TF_TIMELINE_DIR environment variable."
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)
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fetches = sess.run(ops, feed_dict=feed_dict)
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return fetches
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