Windows下如何用C/C++获取cpu数量和物理核数

前言

最近看到个有趣的题目: Windows下如何用C/C++获取cpu数量和物理核数, 感觉比较有意思, 就搜索一下相关问题, 进行回复.

一、WMI是什么？

看这里, 介绍的非常详细, 我们只需用 wmic cpu get XXXX 命令, 就可获取相应的CPU信息.

二、使用步骤

以下是 win10 环境能提供的所有CPU参数, 可谓相当齐全.

#include <stdio.h>#include <stdlib.h>#include <string.h>// 命令调取 CpuID#define CpuNum "wmic cpu get DeviceID"// 命令调取 Cpu 物理核数#define CpuCoreNum "wmic cpu get NumberOfCores"// 命令调取 Cpu 逻辑核数#define CpuLogicalCoreNum "wmic cpu get NumberOfLogicalProcessors"#define __AddressWidth "wmic cpu get AddressWidth"#define __Architecture "wmic cpu get Architecture"#define __AssetTag "wmic cpu get AssetTag"#define __Availability "wmic cpu get Availability"#define __Caption "wmic cpu get Caption"#define __Characteristics "wmic cpu get Characteristics"#define __ConfigManagerErrorCode "wmic cpu get ConfigManagerErrorCode"#define __ConfigManagerUserConfig "wmic cpu get ConfigManagerUserConfig"#define __CpuStatus "wmic cpu get CpuStatus"#define __CreationClassName "wmic cpu get CreationClassName"#define __CurrentClockSpeed "wmic cpu get CurrentClockSpeed"#define __CurrentVoltage "wmic cpu get CurrentVoltage"#define __DataWidth "wmic cpu get DataWidth"#define __Description "wmic cpu get Description"#define __DeviceID "wmic cpu get DeviceID"#define __ErrorCleared "wmic cpu get ErrorCleared"#define __ErrorDescription "wmic cpu get ErrorDescription"#define __ExtClock "wmic cpu get ExtClock"#define __Family "wmic cpu get Family"#define __InstallDate "wmic cpu get InstallDate"#define __L2CacheSize "wmic cpu get L2CacheSize"#define __L2CacheSpeed "wmic cpu get L2CacheSpeed"#define __L3CacheSize "wmic cpu get L3CacheSize"#define __L3CacheSpeed "wmic cpu get L3CacheSpeed"#define __LastErrorCode "wmic cpu get LastErrorCode"#define __Level "wmic cpu get Level"#define __LoadPercentage "wmic cpu get LoadPercentage"#define __Manufacturer "wmic cpu get Manufacturer"#define __MaxClockSpeed "wmic cpu get MaxClockSpeed"#define __Name "wmic cpu get Name"#define __NumberOfCores "wmic cpu get NumberOfCores"#define __NumberOfEnabledCore "wmic cpu get NumberOfEnabledCore"#define __NumberOfLogicalProcessors "wmic cpu get NumberOfLogicalProcessors"#define __OtherFamilyDescription "wmic cpu get OtherFamilyDescription"#define __PartNumber "wmic cpu get PartNumber"#define __PNPDeviceID "wmic cpu get PNPDeviceID"#define __PowerManagementCapabilities "wmic cpu get PowerManagementCapabilities"#define __PowerManagementSupported "wmic cpu get PowerManagementSupported"#define __ProcessorId "wmic cpu get ProcessorId"#define __ProcessorType "wmic cpu get ProcessorType"#define __Revision "wmic cpu get Revision"#define __Role "wmic cpu get Role"#define __SecondLevelAddressTranslationExtensions\"wmic cpu get SecondLevelAddressTranslationExtensions"#define __SerialNumber "wmic cpu get SerialNumber"#define __SocketDesignation "wmic cpu get SocketDesignation"#define __Status "wmic cpu get Status"#define __StatusInfo "wmic cpu get StatusInfo"#define __Stepping "wmic cpu get Stepping"#define __SystemCreationClassName "wmic cpu get SystemCreationClassName"#define __SystemName "wmic cpu get SystemName"#define __ThreadCount "wmic cpu get ThreadCount"#define __UniqueId "wmic cpu get UniqueId"#define __UpgradeMethod "wmic cpu get UpgradeMethod"#define __Version "wmic cpu get Version"#define __VirtualizationFirmwareEnabled\"wmic cpu get VirtualizationFirmwareEnabled"#define __VMMonitorModeExtensions "wmic cpu get VMMonitorModeExtensions"#define __VoltageCaps "wmic cpu get VoltageCaps"// 获取 Cpu 信息void getCpuInformation(const char *command){// 获取windows命令回执FILE *winCommand = popen(command, "r");char buf[100] = {};if (!winCommand){perror("popen");exit(EXIT_FAILURE);}else{// 输出命令回执while (fgets(buf, sizeof(buf) - 1, winCommand) != 0){printf("%s", buf);memset(buf, 0, sizeof(buf));}pclose(winCommand);}}int main(){// 具体核数要数ID个数getCpuInformation(CpuNum);// 具体物理核数直接给出getCpuInformation(CpuCoreNum);// 具体逻辑核数直接给出getCpuInformation(CpuLogicalCoreNum);return 0;}

总结

对于底层硬件信息的获取, 和具体环境有直接关系, 各个系统都需根据系统实现进行操作, 也就是说, 不可移植.