PerformanceCounter数据不正确吗？

Question

我有个问题..。我从PerfomanceCounter得到了实际的CPU和内存使用率，但是在任务管理器中的结果看起来很不一样，为什么？

左边的任务管理器，右边的form1

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这是我的Form1的cpu和ram使用率的代码。

    private PerformanceCounter theCPUCounter = new PerformanceCounter("Process", "% Processor Time", Process.GetCurrentProcess().ProcessName);
    private PerformanceCounter theMemCounter = new PerformanceCounter("Process", "Working Set", Process.GetCurrentProcess().ProcessName);

    private String getCpuUsagePercent()
    {
        string abc = Convert.ToString(theCPUCounter.NextValue().ToString("##0.##"));
        return abc + " %";
    }
    private String getramusage()
    {
        return theMemCounter.NextValue() + " MB";
    }

我的计时器计时500毫秒：

    private void timer1_Tick(object sender, EventArgs e)
    {
        double ram = theMemCounter.NextValue();
        double cpu = theCPUCounter.NextValue();
        double cpucalc = ram / 1024 / 1024;
        string cpucalc1 = Convert.ToString(cpucalc.ToString("######0.###"));
        label37.Text = ("RAM: " + cpucalc1 + " MB; CPU: " + (cpu.ToString("###0.###")) + " %");
    }

//工作内容...

private PerformanceCounter theMemCounter = new PerformanceCounter("Process", "Working Set - Private", Process.GetCurrentProcess().ProcessName);

Answer 1

这是因为您正在获取当前进程的性能计数

private PerformanceCounter theCPUCounter = new PerformanceCounter("Process", "% Processor Time", Process.GetCurrentProcess().ProcessName);

Process.GetCurrentProcess().ProcessName

因此，如果您想获取总体使用情况，请使用Check this