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step_per_second_tracker.py
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step_per_second_tracker.py
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# coding=utf-8
# Copyright 2020 The TF-Agents Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Utility class to keep track of global training steps per second."""
import time
class StepPerSecondTracker(object):
"""Utility class for measuring steps/second."""
def __init__(self, step):
"""Creates an instance of the StepPerSecondTracker.
Args:
step: `tf.Variable` holding the current value for the number of train
steps.
"""
self.step = step
self.last_iteration = 0
self.last_time = 0
self.restart()
def restart(self):
self.last_iteration = self.step.numpy()
self.last_time = time.time()
def steps_per_second(self):
value = (self.step.numpy() - self.last_iteration) / (
time.time() - self.last_time
)
return value