66 lines
1.9 KiB
Python
66 lines
1.9 KiB
Python
# Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from mxnet.io import DataIter
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import time
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class BenchmarkingDataIter:
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def __init__(self, data_iter, benchmark_iters=None):
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self.data_iter = data_iter
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self.benchmark_iters = benchmark_iters
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self.overall_time = 0
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self.num = 0
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def __iter__(self):
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iter(self.data_iter)
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return self
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def next(self):
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if self.benchmark_iters is not None and self.num >= self.benchmark_iters:
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raise StopIteration
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try:
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start_time = time.time()
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ret = self.data_iter.next()
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end_time = time.time()
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except StopIteration:
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if self.benchmark_iters is None:
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raise
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self.data_iter.reset()
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start_time = time.time()
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ret = self.data_iter.next()
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end_time = time.time()
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if self.num != 0:
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self.overall_time += end_time - start_time
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self.num += 1
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return ret
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def __next__(self):
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return self.next()
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def __getattr__(self, attr):
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return getattr(self.data_iter, attr)
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def get_avg_time(self):
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if self.num <= 1:
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avg = float('nan')
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else:
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avg = self.overall_time / (self.num - 1)
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return avg
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def reset(self):
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self.overall_time = 0
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self.num = 0
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self.data_iter.reset()
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