| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| #ifndef SINGA_CORE_MEMORY_H_ |
| #define SINGA_CORE_MEMORY_H_ |
| |
| #include <mutex> |
| #include <atomic> |
| #include "singa/proto/core.pb.h" |
| #include "singa/singa_config.h" |
| |
| #ifdef USE_CUDA |
| #include "cnmem.h" |
| #endif |
| |
| |
| namespace singa { |
| |
| /// Manage device memory pool including garbage collection, memory opt. |
| class VirtualMemory {}; |
| |
| class DeviceMemPool { |
| public: |
| virtual void Malloc(void** ptr, const size_t size) = 0; |
| virtual void Free(void* ptr) = 0; |
| |
| /// Return a pair for free and total memory managed by this pool. |
| virtual std::pair<size_t, size_t> GetMemUsage() { |
| return std::make_pair(0u, 0u); |
| } |
| virtual ~DeviceMemPool(){}; |
| |
| protected: |
| size_t usage_; |
| // size_t init_size_ = 0, max_size_ = 0; |
| }; |
| |
| #ifdef USE_CUDA |
| class CnMemPool : public DeviceMemPool { |
| public: |
| // Create the mem pool by setting the devices [0, numDevices), and |
| // initial pool size (MB), and max pool size (no effect currently). |
| CnMemPool(int numDevices = 1, size_t init_size = 256, size_t max_size = 0); |
| CnMemPool(const MemPoolConf& conf); |
| |
| void Malloc(void** ptr, const size_t size); |
| void Free(void* ptr); |
| |
| std::pair<size_t, size_t> GetMemUsage() override; |
| |
| // release all memory and set cnmem manager to unintialized |
| ~CnMemPool(); |
| |
| protected: |
| void Init(); |
| |
| |
| private: |
| |
| MemPoolConf conf_; |
| // whether the (global) memory pool has been initialized |
| bool initialized_ = false; |
| // lock on the initialized variable |
| std::mutex mtx_; |
| |
| static std::atomic<int> pool_count; |
| }; |
| |
| class CudaMemPool : public DeviceMemPool { |
| public: |
| void Malloc(void** ptr, const size_t size) override; |
| void Free(void* ptr) override; |
| }; |
| #endif |
| } // namespace singa |
| #endif // SINGA_CORE_MEMORY_H_ |