1 /* 2 * Copyright (C) 2021 Huawei Device Co., Ltd. 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 #include <cmath> 16 #include "include/DDR.h" 17 namespace OHOS { 18 namespace SmartPerf { 19 pthread_mutex_t DDR::mutex; 20 DDR *DDR::instance = nullptr; getInstance()21 DDR *DDR::getInstance() 22 { 23 if (instance == nullptr) { 24 pthread_mutex_lock(&mutex); 25 if (instance == nullptr) { 26 instance = new DDR(); 27 } 28 pthread_mutex_unlock(&mutex); 29 } 30 return instance; 31 } 32 DDR()33 DDR::DDR() 34 { 35 pthread_mutex_init(&mutex, nullptr); 36 } 37 getDdrFreq()38 long long DDR::getDdrFreq() 39 { 40 long long curFreq; 41 42 FILE *fp; 43 static char buffer[256]; 44 const int defaultUnit = 1000; 45 const int defaultHalf = 2; 46 fp = fopen(ddr_cur_freq_path.c_str(), "r"); 47 if (fp == nullptr) { 48 printf("getDDRInfoFromNode()-fopen %s, err=%s\n", ddr_cur_freq_path.c_str(), strerror(errno)); 49 curFreq = -1; 50 } else { 51 buffer[0] = '\0'; 52 long long curDDR = -1; 53 while (fgets(buffer, sizeof(buffer), fp)) { 54 if (sscanf(buffer, "DDR :%lld", &curDDR) < 0) { 55 continue; 56 } 57 } 58 if (curDDR != -1) { 59 curFreq = curDDR * defaultUnit / defaultHalf; 60 } else { 61 curFreq = std::atoll(buffer); 62 } 63 printf("getDDRInfoFromNode()-cur_freq: %lld\n", curFreq); 64 fclose(fp); 65 } 66 return curFreq; 67 } 68 } 69 } 70