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我正在考虑制作一个改进版的 Windows 资源监视器，它不仅包括资源使用情况，还包括硬件状态，例如温度和风扇速度。

我昨天开始使用 c++ 对其进行编程，并且我已经成功地列出并刷新了我计算机上每个进程的内存和 CPU 利用率。

然而，问题来了：它非常慢。每秒轮询一次使用情况时，它使用了我的 i5 2500k@4.3 GHz 的 5%。这是不可接受的，因为我不仅想要 CPU 和内存使用情况，还想要每个硬盘驱动器的磁盘使用情况、互联网使用情况、GPU 使用情况（每个进程的所有这些），然后我还想监控所有温度。

这是我的代码：

const double MB = 1024*1024;
const double KB = 1024;

struct WinProcess
{
    wstring Name;
    unsigned int ID;
    wstring UserName;
    double cpuUsage;
    long long int ramUsage;

    WinProcess(wstring name, unsigned int id) : Name(name), ID(id), UserName(L"Not set"), cpuUsage(0), ramUsage(0) {}
};

class ResourceMonitor
{
private:
    void** hquery;
    void** hcountercpu;
    void** hcountermem;

    int cpuCores;

    vector<WinProcess> Processes;
public:
    ResourceMonitor();
    ~ResourceMonitor();

    void StartResourceMonitor();
    void MeasureResourceUsage();
    void PrintUsage();
};

ResourceMonitor::ResourceMonitor() : 
    Processes(GetProcessList())    // Function GetProcessList() returns vector with all processes, their IDs and username, from which it was launched
{
    hquery = new void*[Processes.size()];
    hcountercpu = new void*[Processes.size()];
    hcountermem = new void*[Processes.size()];

    for (unsigned int i = 2; i < Processes.size(); i++)
    {
        Processes[i].Name = Processes[i].Name.substr(0, Processes[i].Name.size() - 4);
    }

    for (unsigned int i = 2; i < Processes.size(); i++)
    {
        wstring CounterPathCPU = L"\\Process(" + Processes[i].Name + L")\\% Processor Time";
        wstring CounterPathMEM = L"\\Process(" + Processes[i].Name + L")\\Private Bytes";

        if ((PdhOpenQuery(NULL, 0, &hquery[i])) != ERROR_SUCCESS
            || PdhAddCounter(hquery[i], CounterPathCPU.c_str(), 0, &hcountercpu[i]) != ERROR_SUCCESS
            || PdhAddCounter(hquery[i], CounterPathMEM.c_str(), 0, &hcountermem[i]) != ERROR_SUCCESS
            || PdhCollectQueryData(hquery[i]) != ERROR_SUCCESS)
        {
            continue;
        }
    }

    SYSTEM_INFO sysinfo;
    GetSystemInfo(&sysinfo);
    cpuCores = sysinfo.dwNumberOfProcessors;

    wcout.setf(ios::fixed);
}

ResourceMonitor::~ResourceMonitor()
{    
    for (unsigned int i = 2; i < Processes.size(); i++)
    {
        PdhCloseQuery(hquery[i]);
        PdhRemoveCounter(hcountercpu[i]);
        PdhRemoveCounter(hcountermem[i]);
    }

    delete[] hquery;
    delete[] hcountercpu;
}

void ResourceMonitor::StartResourceMonitor()
{
    system("mode CON: COLS=150");

    while (1)
    {
        MeasureResourceUsage();
        PrintUsage();
        Sleep(1000);
    }
}

void ResourceMonitor::MeasureResourceUsage()
{
    PDH_FMT_COUNTERVALUE countervalcpu;
    PDH_FMT_COUNTERVALUE countervalmem;

    for (unsigned int i = 2; i < Processes.size(); i++)
    {
        if ((PdhCollectQueryData(hquery[i])) != ERROR_SUCCESS)
        {   
            printError(L"Error on collecting query data: ");
            continue;
        }        
        if ((PdhGetFormattedCounterValue(hcountercpu[i], PDH_FMT_LONG | PDH_FMT_NOCAP100, 0, &countervalcpu)) != ERROR_SUCCESS)
        {
            printError(L"Error on CPU usage retrieval: ");
            continue;
        }
        if ((PdhGetFormattedCounterValue(hcountermem[i], PDH_FMT_LONG, 0, &countervalmem)) != ERROR_SUCCESS)
        {
            printError(L"Error on Memory usage retrieval: ");
            continue;
        }

        Processes[i].cpuUsage = countervalcpu.longValue / (double)cpuCores;
        Processes[i].ramUsage = countervalmem.longValue;
    }
}

void ResourceMonitor::PrintUsage()
{
    system("cls");
    long long int RAMSUM = 0;
    for (unsigned int i = 2; i < Processes.size(); i++)
    {
        wcout << left << setw(40) << Processes[i].Name + L".exe: ";
        wcout << setw(6) << left << L" | ID " << setw(4) << right << Processes[i].ID;
        wcout << setw(8) << left << L" | User " << setw(15) << Processes[i].UserName;
        wcout << setw(8) << left << L" | CPU usage " << setw(10) << right << setprecision(2) << Processes[i].cpuUsage << setw(1) << L"%";
        wcout << setw(8) << left << L" | RAM usage " << setw(15) << right << setprecision(3) << Processes[i].ramUsage / MB << setw(3) << left << L" MB" << endl;

        RAMSUM += Processes[i].ramUsage;
    }
    wcout << L"Total RAM usage: " << setw(7) << right << RAMSUM / MB
        << setw(3) << left << L" MB" << endl;
}

我很清楚围绕此代码的问题：进程列表永远不会更新，也没有 GUI，但这些是可以修复的，因为获取进程列表功能非常快。

有没有办法像 Windows 任务管理器那样检查 CPU 和内存使用任务？我可以使用 c++ 或 c#，因为我知道这两种语言。最后，我不知道如何监控每个进程的网络流量、磁盘使用情况和 GPU 使用情况。有任何想法吗？谢谢您的帮助！

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1 回答 1

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我上次使用 cpu 和 mem 统计数据时使用的是 Delphi，但这些调用非常适合 Windows API。我在这个答案的末尾包含了 Delphi/pascal 源代码，这样你就可以看到我使用的实际代码。这涵盖了 CPU 和内存使用情况，但对于您关于网络流量、磁盘使用情况和 GPU 使用情况的最后一个问题，我没有答案。

这些链接涵盖了我使用的技术，但适用于 c/c++。对于 c#，这一切都很好地包含在System.Diagnostics.Process类中，并且非常易于访问。

内存使用情况：

http://msdn.microsoft.com/en-us/library/windows/desktop/ms683219%28v=vs.85%29.aspx

http://msdn.microsoft.com/en-us/library/windows/desktop/ms684877%28v=vs.85%29.aspx

如何在 C++ 中使用 GetProcessMemoryInfo？

如何在 C++ 中获取 Windows 下的内存使用情况

CPU时间：

http://msdn.microsoft.com/en-us/library/windows/desktop/ms683223%28v=vs.85%29.aspx

使用 GetProcessTimes 和 FileTimeToSystemTime 的 CPU 处理时间在 64 位 win 中不起作用 

// this member var is referenced within the function
mLastMemInfo: TProcessMemoryCounters;

procedure TProcess.UpdateStats(handle: Cardinal);
var
  creation, exit, kernel, user: FILETIME;
  sysTime: TSystemTime;
  iKernel: Int64;
  iUser: Int64;
  totalTime: Int64;
  tickCount: Cardinal;
  tDelta: Cardinal;
begin
  if (handle <> INVALID_HANDLE) then begin
    tickCount := GetTickCount;
    tDelta := tickCount - mLastStatsTick;
    // only update stats if its been 500 ms or more since last check
    // or if we haven't checked at all yet
    if (tDelta >= 500) then begin
      // get cpu stats
      if GetProcessTimes(handle, creation, exit, kernel, user) then begin
        if (mCreationTime = 0) then begin
          if (FileTimeToSystemTime(creation, sysTime)) then begin
            mCreationTime := SystemTimeToDateTime(sysTime);
          end;
        end;
        iKernel := kernel.dwHighDateTime;
        iKernel := (iKernel shl 32) or kernel.dwLowDateTime;
        iUser := user.dwHighDateTime;
        iUser := (iUser shl 32) or user.dwLowDateTime;
        iKernel := iKernel div 10; // convert 100nanos to microseconds
        iUser := iUser div 10; // convert 100nanos to microseconds
        mLastKernelDelta := iKernel - mLastKernelTime;
        mLastUserDelta := iUser - mLastUserTime;
        totalTime := mLastKernelDelta + mLastUserDelta;
        if (totalTime <= 0) and (mLastStatsTick = 0) then begin
          mLastCpuUsage := 0;
        end else begin
          mLastCpuUsage := (totalTime / NumberOfProcessors) / (tDelta * 1000);
          if (mLastCpuUsage > 1.0) then mLastCpuUsage := 1.0;
        end;
        mLastKernelTime := iKernel;
        mLastUserTime := iUser;
      end else begin
        mLastCpuUsage := 0;
      end;
      // get memory stats
      mLastMemInfo.cb := SizeOf(mLastMemInfo);
      if not GetProcessMemoryInfo(handle, @mLastMemInfo,
                    SizeOf(mLastMemInfo)) then begin
        mLastMemInfo.cb := 0; // flag data as no good
      end;
      // set the time we got the stats
      mLastStatsTick := tickCount;
    end;
  end;
end;
于 2012-08-29T02:16:15.270 回答