2 * Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef __ONERT_BACKEND_CONTROLFLOW_EXTERNAL_CONTEXT_H__
18 #define __ONERT_BACKEND_CONTROLFLOW_EXTERNAL_CONTEXT_H__
20 #include <backend/IExternalContext.h>
21 #include <util/ConfigSource.h>
23 #include <ruy/context.h>
24 #include <ruy/context_get_ctx.h>
30 const int kDefaultNumThreadpoolThreads = 1;
40 // TODO Unify this with cpu::ExternalContext
41 class ExternalContext : public IExternalContext
44 ExternalContext() : _ruy_context(std::make_unique<ruy::Context>())
46 setMaxNumThreads(onert::util::getConfigInt(onert::util::config::RUY_THREADS));
50 void setMaxNumThreads(int max_num_threads)
52 const int target_num_threads =
53 max_num_threads > -1 ? max_num_threads : kDefaultNumThreadpoolThreads;
54 _ruy_context->set_max_num_threads(target_num_threads);
57 ruy::Context *ruy_context() const { return _ruy_context.get(); }
60 void initPerThreadState()
62 // Initialize per-thread state.
63 const int thread_count = _ruy_context->max_num_threads();
64 auto ctx = ruy::get_ctx(_ruy_context.get());
65 ctx->EnsureThreadSpecificResources(thread_count);
66 for (int i = 0; i < thread_count; i++)
68 ctx->GetThreadSpecificTuningResolver(i)->SetTuning(ctx->explicit_tuning());
73 const std::unique_ptr<ruy::Context> _ruy_context;
76 } // namespace controlflow
77 } // namespace backend
80 #endif // __ONERT_BACKEND_CONTROLFLOW_EXTERNAL_CONTEXT_H__