| /* Copyright 2019 Google LLC. All Rights Reserved. |
| |
| 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 |
| |
| http://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. |
| ==============================================================================*/ |
| |
| #include "ruy/tune.h" |
| |
| #include <algorithm> |
| #include <cstdint> |
| |
| #include "ruy/cpuinfo.h" |
| |
| namespace ruy { |
| |
| Tuning TuningResolver::ResolveNow(CpuInfo* cpuinfo) { |
| return cpuinfo->CurrentCpuIsA55ish() ? Tuning::kA55ish : Tuning::kGeneric; |
| } |
| |
| TuningResolver::TuningResolver() |
| : expiry_duration_(DurationFromMilliseconds(250)) {} |
| |
| Tuning TuningResolver::Resolve(CpuInfo* cpuinfo) { |
| if (unresolved_tuning_ != Tuning::kAuto) { |
| return unresolved_tuning_; |
| } |
| TimePoint new_timepoint = CoarseNow(); |
| if (last_resolved_tuning_ != Tuning::kAuto && |
| (new_timepoint - last_resolved_timepoint_) < expiry_duration_) { |
| return last_resolved_tuning_; |
| } |
| last_resolved_timepoint_ = new_timepoint; |
| last_resolved_tuning_ = ResolveNow(cpuinfo); |
| return last_resolved_tuning_; |
| } |
| |
| } // namespace ruy |