性能计数器用于磁盘读/写时间

Question

In my application, I am gathering data regarding the performance of system, where I need to find

• % Free Space
• % Disk Time
• % Disk Read Time
• % Disk Write Time
• % Idle Time
• % Usage
• % Usage Peak

using below function;

private void CollectnPopulatePerfCounters()
    {
        try
        {
            foreach (var pc in System.Diagnostics.PerformanceCounterCategory.GetCategories())
            {
                if (pc.CategoryName == "LogicalDisk" || pc.CategoryName == "Paging File" || pc.CategoryName == "ProcessorPerformance")
                {
                    try
                    {
                        foreach (var insta in pc.GetInstanceNames())
                        {
                            try
                            {
                                foreach (PerformanceCounter cntr in pc.GetCounters(insta))
                                {
                                    using (System.IO.StreamWriter sw = new System.IO.StreamWriter("C:\\amit.txt", true))
                                    {
                                        sw.WriteLine("--------------------------------------------------------------------");
                                        sw.WriteLine("Category Name : " + pc.CategoryName);
                                        sw.WriteLine("Counter Name : " + cntr.CounterName);
                                        sw.WriteLine("Explain Text : " + cntr.CounterHelp);
                                        sw.WriteLine("Instance Name: " + cntr.InstanceName);
                                        sw.WriteLine("Value : " + Convert.ToString(cntr.RawValue));  //TODO:
                                        sw.WriteLine("Counter Type : " + cntr.CounterType);
                                        sw.WriteLine("--------------------------------------------------------------------");
                                    }
                                }
                            }
                            catch (Exception) { }
                        }
                    }
                    catch (Exception) { }
                }
            }
        }
        catch (Exception) { }
    }

When the code is executed the data is generated. While observing I found that the value against the above mentioned list [ie % free space, % disk time etc.] is not in correct form.

On my machine the value for

• % Disk Read Time = 44553438000 for C Drive
• % Usage Peak = 48386 for \\??\\C:\\pagefile.sys

actually the value should be in the percent form [ ie within the range of 0 to 100 % ]

Is there any way to get the exact value for all these except [% free Space for which I have calculated].

Or

Does anyone know how to calculate for rest of all headers.

Answer 1

Use following

sw.WriteLine("Value : " + Convert.ToString(Math.Round(cntr.NextValue(),2)) + "%");

More info at:

Why the cpu performance counter kept reporting 0% cpu usage?

All the best!

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