Windows获取系统、进程CPU占用率、内存、磁盘、网卡 |
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Windows获取系统、进程CPU占用率、内存、磁盘、网卡
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1、获取系统cpu： 使用WindowsAPI函数GetSystemTimes()，为获取当前使用率，通过执行两次的方式进行差值比较。在win7，win10上试验结果准确，具体用法参考下列代码： //Windows程序获取cpu占用率 void GetCpuUsage_WIN(double* CPUResult) { CPUResult[0] = 0; CPUResult[1] = 0; FILETIME ftIdle, ftKernel, ftUser; //GetSystemTimes()获取系统CPU空闲时间、内核时间、用户时间 if (GetSystemTimes(&ftIdle, &ftKernel, &ftUser)) { m_fOldCPUIdleTime = FileTimeToDouble(&ftIdle); m_fOldCPUKernelTime = FileTimeToDouble(&ftKernel); m_fOldCPUUserTime = FileTimeToDouble(&ftUser); //printf("自开机来的平均CPU占用率:%2.f%%", 100 * (1 - (m_fOldCPUIdleTime) / (m_fOldCPUKernelTime + m_fOldCPUUserTime))); //printf(" %2.f%%\n", 100 * (m_fOldCPUIdleTime) / (m_fOldCPUKernelTime + m_fOldCPUUserTime)); } Sleep(1000); if (GetSystemTimes(&ftIdle, &ftKernel, &ftUser)) { m_fOldCPUIdleTime = FileTimeToDouble(&ftIdle) - m_fOldCPUIdleTime; m_fOldCPUKernelTime = FileTimeToDouble(&ftKernel) - m_fOldCPUKernelTime; m_fOldCPUUserTime = FileTimeToDouble(&ftUser) - m_fOldCPUUserTime; } /* *计算cpu占用率，注意内核时间中包含空闲时间，空闲时间为cpu空转时间 *运行时间=用户时间+内核时间-空闲时间 *间隔时间=用户时间+内核时间 *cpu占用率=运行时间/间隔时间，cpu闲置率=空闲时间/间隔时间 */ *CPUResult++ = 100 * (1 - (m_fOldCPUIdleTime) / (m_fOldCPUKernelTime + m_fOldCPUUserTime)); *CPUResult = (m_fOldCPUIdleTime) / (m_fOldCPUKernelTime + m_fOldCPUUserTime) * 100; CPUResult--; }win7比较如下：
2、获取进程CPU： 在最开始选择了使用GetProcessTimes()函数实现，发现其返回值中仅包含了内核时间以及用户时间，即使求取了差值也不清楚分母的大小，故在试验中使用GetSystemTimes()计算总时间。各位看官如可以采取更好的方式实现，可以在下发留言以供其他同学参考。 实现代码如下，win7、win10下与任务管理器结果一致，需注意，代码粗暴，自行优美： //Windows执行cmd指令 bool Wincmd(char* cmd, char* result) { char buffer[128];//缓冲区 FILE* pipe = _popen(cmd, "r");//_popen函数创建管道调用fork产生子进程,以执行cmd指令,这个进程需以_pclose关闭 if (!pipe) { _pclose(pipe); return false; } while (!feof(pipe)) { //feof判断流、文件是否读完 if (fgets(buffer, 128, pipe)) { strcat_s(result, 1024, buffer); if (strlen(result) > 896) { break; } } } _pclose(pipe); return true; } //判断进程是否存在 bool IsProExit(int ID) { char str[128] = "tasklist /FI \"PID eq "; char strPID[24] = { '\0' }; char* strbuf = NULL; char* tmpstr = NULL; _itoa_s(ID, strPID, 24, 10); strcat_s(str, strPID); strcat_s(str, "\"\n"); Wincmd(str, result); if (!strstr(result, "PID")) { return false; } //获取PID进程名称 strtok_s(result, "\n", &strbuf); strtok_s(strbuf, "\n", &tmpstr); strtok_s(tmpstr, " ", &strbuf); strncpy_s(ProName, tmpstr, strlen(tmpstr)); memset(result, '\0', sizeof(result)); return true; } //获取进程cpu占用率 void GetCpuUsagPID_WIN(double* CPUResult) { CPUResult[0] = 0; CPUResult[1] = 0; if (PID Shared == 0) dwMem += si.dwPageSize; } PIDMem[1] = dwMem / 1024; printf("dwMem:%u\n", dwMem/1024); } //free(pBuf); } //free(hprocess); } void GetMemUsagPID_WIN(int* PIDMem) { //先判断进程是否存在 if (!IsProExit(PID)) { PIDMem[0] = -1;//不存在则置为-1 return; } //获取总内存大小，MB GlobalMemoryStatusEx(&MemStat); PIDMem[0] = MemStat.ullTotalPhys / 1024 / 1024; //获取系统版本 OSVERSIONINFO osvi; memset(&osvi, 0, sizeof(OSVERSIONINFO)); osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); GetVersionExA(&osvi);//获取版本信息，需注意，windows8.1后 此函数被废弃，均返回6.2 //较旧版本 if (osvi.dwMajorVersion < 6.3){ GetMemVerOld(PIDMem); return; } //较新版本 //GetProcessMemoryInfo()获取PID进程内存占用/字节 HANDLE hprocess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, PID); if (GetProcessMemoryInfo(hprocess, &pmc, sizeof(pmc))) { PIDMem[1] = pmc.WorkingSetSize / 1024; PIDMem[2] = pmc.PagefileUsage / 1024 ; } else { PIDMem[0] = -1; return; } }此时结果就十分精确了，只是kb级别（任务管理器显示为kb）是无误差的。
5、CPU、磁盘、网卡： 查阅对应API属实花了不少时间，最后考虑使用WMI API函数实现，另附赠磁盘IO。具体代码如下： void UseWmi(int caseNum){ //result code from COM calls HRESULT hr = 0; //COM interface pointers IWbemLocator *locator = NULL; IWbemServices *services = NULL; IEnumWbemClassObject *results = NULL; BSTR resource = SysAllocString(L"ROOT\\CIMV2"); BSTR language = SysAllocString(L"WQL"); /* Win32_PerfFormattedData_PerfDisk_LogicalDisk 代表逻辑磁盘性能数据对象，利用该对象可以获得磁盘的心能信息。Win32_PerfFormattedData_PerfDisk_LogicalDisk对象有以下一些主要的属性： Name： 磁盘名称 DiskTransfersPerSec：每秒磁盘传输次数。 DiskReadBytesPerSec：每秒从磁盘读取得数据量，单位为Byte。 DiskWriteBytesPerSec：每秒从磁盘读取得数据量，单位为Byte。 PercentFreeSpace：可用磁盘百分比。*/ BSTR query = NULL; //设定query switch (caseNum) { case 1: query = SysAllocString(L"Select * FROM Win32_PerfFormattedData_PerfOS_Processor"); break; case 3: query = SysAllocString(L"Select * FROM Win32_PerfFormattedData_PerfDisk_LogicalDisk"); break; case 30: query = SysAllocString(L"Select * FROM Win32_PerfFormattedData_PerfProc_Process"); break; case 4: query = SysAllocString(L"Select * FROM Win32_PerfFormattedData_Tcpip_NetworkInterface"); break; default: break; } //BSTR query = SysAllocString(L"Select PercentProcessorTime,IDProcess from Win32_PerfFormattedData_PerfProc_Process where IDProcess=992"); //initialize COM hr = CoInitializeEx(0, COINIT_MULTITHREADED); hr = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_DEFAULT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL); // connect to WMI hr = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID *)&locator); hr = locator->ConnectServer(resource, NULL, NULL, NULL, 0, NULL, NULL, &services); // issue a WMI query hr = services->ExecQuery(language, query, WBEM_FLAG_BIDIRECTIONAL, NULL, &results); // list the query results if (results != NULL) { IWbemClassObject *result = NULL; ULONG returnedCount = 0; // enumerate the retrieved objects switch (caseNum) { case 1: while ((hr = results->Next(WBEM_INFINITE, 1, &result, &returnedCount)) == S_OK) { VARIANT name; VARIANT PercentIdleTime; // obtain the desired properties of the next result and print them out hr = result->Get(L"Name", 0, &name, 0, 0); //hr = result->Get(L"PercentIdleTime", 0, &PercentIdleTime, 0, 0); hr = result->Get(L"PercentProcessorTime", 0, &PercentIdleTime, 0, 0); BSTR tmp=PercentIdleTime.bstrVal; wprintf(L"## CPU:%s\t\tUse:%s%%\r\n", name.bstrVal, PercentIdleTime.bstrVal); if (EXCEL_status > 0) { } // release the current result object result->Release(); } break; case 3: DiskNum = 0; while ((hr = results->Next(WBEM_INFINITE, 1, &result, &returnedCount)) == S_OK) { // obtain the desired properties of the next result and print them out hr = result->Get(L"Name", 0, &name[DiskNum + DiskDt], 0, 0); hr = result->Get(L"DiskReadBytesPerSec", 0, &Readspeed[DiskNum + DiskDt], 0, 0); hr = result->Get(L"DiskWriteBytesPerSec", 0, &Writespeed[DiskNum + DiskDt], 0, 0); //wprintf(L"## DISK:%s\t\tReadSpeed:%d Bytes/s\t\tWriteSpeed:%d Byte/s,\r\n", name[DiskNum + DiskDt].bstrVal, Readspeed[DiskNum + DiskDt].intVal, Writespeed[DiskNum + DiskDt].intVal); // release the current result object result->Release(); DiskNum++; } break; case 30: while ((hr = results->Next(WBEM_INFINITE, 1, &result, &returnedCount)) == S_OK) { VARIANT name; char tmpID[256] = { '\0' }; // obtain the desired properties of the next result and print them out hr = result->Get(L"IDProcess", 0, &name, 0, 0); if (name.intVal == PID){ hr = result->Get(L"IODataBytesPersec", 0, &IODataBytesPersec, 0, 0); hr = result->Get(L"IOReadBytesPersec", 0, &IOReadBytesPersec, 0, 0); hr = result->Get(L"IOWriteBytesPersec", 0, &IOWriteBytesPersec, 0, 0); //wprintf(L"## PID:%d\tTotalIOSpeed:%d Bytes/s\tReadIOSpeed:%d Byte/s,\tWriteIOSpeed:%d Byte/s,\r\n", PID, IODataBytesPersec.intVal, IOReadBytesPersec.intVal, IOWriteBytesPersec.intVal); // release the current result object } result->Release(); } break; case 4: DiskNum = 0;//此处指代网卡数量,少定义变量，同样的还有DiskDt while ((hr = results->Next(WBEM_INFINITE, 1, &result, &returnedCount)) == S_OK) { //VARIANT name; // obtain the desired properties of the next result and print them out hr = result->Get(L"Name", 0, &name[DiskNum+DiskDt], 0, 0); hr = result->Get(L"BytesReceivedPersec", 0, &BytesReceivedPersec[DiskNum + DiskDt], 0, 0); hr = result->Get(L"BytesSentPersec", 0, &BytesSentPersec[DiskNum + DiskDt], 0, 0); hr = result->Get(L"BytesTotalPersec", 0, &BytesTotalPersec[DiskNum + DiskDt], 0, 0); //wprintf(L"## NETCARD:%s\n\tReceiveSpeed:%d Bytes/s\t\tSendSpeed:%d Bytes/s\t\tTotalSpeed:%d Bytes/s\r\n", name[DiskNum + DiskDt].bstrVal, BytesReceivedPersec[DiskNum + DiskDt].intVal, BytesSentPersec[DiskNum + DiskDt].intVal, BytesTotalPersec[DiskNum + DiskDt].intVal); // release the current result object result->Release(); DiskNum++; } break; default: break; } } // release WMI COM interfaces results->Release(); services->Release(); locator->Release(); // unwind everything else we've allocated CoUninitialize(); SysFreeString(query); SysFreeString(language); SysFreeString(resource); }以上代码均可执行。 linux版本下均有对应指令可以获取，会方便许多，此处不贴代码。 整体可执行源码（还包含其他功能代码，跳过即可），稍后上传。 |
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