1/*******************************************************************************
2* Copyright 2022 Intel Corporation
3*
4* Licensed under the Apache License, Version 2.0 (the "License");
5* you may not use this file except in compliance with the License.
6* You may obtain a copy of the License at
7*
8* http://www.apache.org/licenses/LICENSE-2.0
9*
10* Unless required by applicable law or agreed to in writing, software
11* distributed under the License is distributed on an "AS IS" BASIS,
12* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13* See the License for the specific language governing permissions and
14* limitations under the License.
15*******************************************************************************/
16
17#include "common/utils.hpp"
18
19namespace dnnl {
20namespace impl {
21namespace experimental {
22
23// Bnorm expermental feature: calculate mean & variance in single pass over
24// input tensor. Improves performance by 25-33% but uses numerically unstable
25// formula.
26bool DNNL_API use_bnorm_stats_one_pass() {
27#ifdef DNNL_EXPERIMENTAL
28 static const bool stats_onepass_algo
29 = getenv_int_user("EXPERIMENTAL_BNORM_STATS_ONE_PASS", 1);
30#else
31 static const bool stats_onepass_algo = false;
32#endif
33 return stats_onepass_algo;
34}
35
36} // namespace experimental
37} // namespace impl
38} // namespace dnnl
39