Line data    Source code

       1              : /**
       2              :  * Copyright (c) 2025 Huawei Technologies Co., Ltd.
       3              :  * This program is free software, you can redistribute it and/or modify it under the terms and conditions of
       4              :  * CANN Open Software License Agreement Version 2.0 (the "License").
       5              :  * Please refer to the License for details. You may not use this file except in compliance with the License.
       6              :  * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
       7              :  * INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
       8              :  * See LICENSE in the root of the software repository for the full text of the License.
       9              :  */
      10              : 
      11              : #include "proc_reged_mem_mgr_cache.h"
      12              : #include "log.h"
      13              : 
      14              : namespace hcomm {
      15              : 
      16          203 : std::shared_ptr<ProcRegedMemMgrCache> ProcRegedMemMgrCache::GetHolder()
      17              : {
      18              :     // 构造 private，make_shared 无法调用，只能 new。static 保证只 new 一次。
      19          203 :     static std::shared_ptr<ProcRegedMemMgrCache> holder(new ProcRegedMemMgrCache());
      20          203 :     return holder;
      21              : }
      22              : 
      23              : std::shared_ptr<RegedMemMgr>
      24          200 : ProcRegedMemMgrCache::GetOrCreate(const MemMgrCacheKey& key, std::function<std::shared_ptr<RegedMemMgr>()> creator)
      25              : {
      26          200 :     std::lock_guard<std::mutex> lock(mtx_);
      27          200 :     auto it = cacheMap_.find(key);
      28          200 :     if (it != cacheMap_.end()) {
      29          135 :         it->second.refCount++;
      30          135 :         HCCL_INFO(
      31              :             "[ProcRegedMemMgrCache][GetOrCreate] cache hit, refCount[%llu]",
      32              :             static_cast<unsigned long long>(it->second.refCount));
      33          135 :         return it->second.mgrPtr;
      34              :     }
      35              : 
      36           65 :     auto mgrPtr = creator();
      37           65 :     MemMgrEntry entry{mgrPtr, 1};
      38           65 :     cacheMap_.emplace(key, entry);
      39           65 :     HCCL_INFO("[ProcRegedMemMgrCache][GetOrCreate] cache miss, new instance inserted");
      40           65 :     return mgrPtr;
      41          200 : }
      42              : 
      43          203 : void ProcRegedMemMgrCache::Release(const MemMgrCacheKey& key)
      44              : {
      45          203 :     std::lock_guard<std::mutex> lock(mtx_);
      46          203 :     auto it = cacheMap_.find(key);
      47          203 :     if (it == cacheMap_.end()) {
      48            3 :         HCCL_WARNING("[ProcRegedMemMgrCache][Release] key not found, skip release");
      49            3 :         return;
      50              :     }
      51          200 :     if (it->second.refCount > 0) {
      52          200 :         it->second.refCount--;
      53              :     }
      54          200 :     if (it->second.refCount == 0) {
      55           65 :         cacheMap_.erase(it);
      56           65 :         HCCL_INFO("[ProcRegedMemMgrCache][Release] refCount zero, entry erased");
      57              :     } else {
      58          135 :         HCCL_INFO(
      59              :             "[ProcRegedMemMgrCache][Release] refCount remain [%llu]",
      60              :             static_cast<unsigned long long>(it->second.refCount));
      61              :     }
      62          203 : }
      63              : 
      64              : } // namespace hcomm