1 | /* Copyright 2019 Google LLC. All Rights Reserved. |
---|---|
2 | |
3 | Licensed under the Apache License, Version 2.0 (the "License"); |
4 | you may not use this file except in compliance with the License. |
5 | You may obtain a copy of the License at |
6 | |
7 | http://www.apache.org/licenses/LICENSE-2.0 |
8 | |
9 | Unless required by applicable law or agreed to in writing, software |
10 | distributed under the License is distributed on an "AS IS" BASIS, |
11 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 | See the License for the specific language governing permissions and |
13 | limitations under the License. |
14 | ==============================================================================*/ |
15 | |
16 | #include "ruy/tune.h" |
17 | |
18 | #include <algorithm> |
19 | #include <cstdint> |
20 | |
21 | #include "ruy/cpuinfo.h" |
22 | |
23 | namespace ruy { |
24 | |
25 | Tuning TuningResolver::ResolveNow(CpuInfo* cpuinfo) { |
26 | if (cpuinfo->CurrentCpuIsA55ish()) { |
27 | return Tuning::kA55ish; |
28 | } |
29 | if (cpuinfo->CurrentCpuIsX1()) { |
30 | return Tuning::kX1; |
31 | } |
32 | return Tuning::kGeneric; |
33 | } |
34 | |
35 | TuningResolver::TuningResolver() |
36 | : expiry_duration_(DurationFromMilliseconds(250)) {} |
37 | |
38 | Tuning TuningResolver::Resolve(CpuInfo* cpuinfo) { |
39 | if (unresolved_tuning_ != Tuning::kAuto) { |
40 | return unresolved_tuning_; |
41 | } |
42 | TimePoint new_timepoint = CoarseNow(); |
43 | if (last_resolved_tuning_ != Tuning::kAuto && |
44 | (new_timepoint - last_resolved_timepoint_) < expiry_duration_) { |
45 | return last_resolved_tuning_; |
46 | } |
47 | last_resolved_timepoint_ = new_timepoint; |
48 | last_resolved_tuning_ = ResolveNow(cpuinfo); |
49 | return last_resolved_tuning_; |
50 | } |
51 | |
52 | } // namespace ruy |
53 |