CPU usage amd memory usage

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  • Sirisha
    #1

    CPU usage amd memory usage

    I am using the following code to get the CPU usage

    PerformanceCoun ter myCounter;
    myCounter = new PerformanceCoun ter();

    myCounter.Categ oryName = "Processor" ;
    myCounter.Count erName = "% Processor Time";
    myCounter.Insta nceName = "_Total";

    for(int i=0; i < 20; i++)
    myCounter.NextV alue();

    I ran this progam i am seeing values 0 or 100%, but when i see the task
    manager the CPU usage is 6 to 22 %.

    Am i missing something

    --
    Sirisha
    Tags: None
    • Bruce Wood
      #2
      Re: CPU usage amd memory usage


      Sirisha wrote:
      I am using the following code to get the CPU usage
      >
      PerformanceCoun ter myCounter;
      myCounter = new PerformanceCoun ter();
      >
      myCounter.Categ oryName = "Processor" ;
      myCounter.Count erName = "% Processor Time";
      myCounter.Insta nceName = "_Total";
      >
      for(int i=0; i < 20; i++)
      myCounter.NextV alue();
      >
      I ran this progam i am seeing values 0 or 100%, but when i see the task
      manager the CPU usage is 6 to 22 %.
      First of all, 20 reptitions aren't going to show you anything. You need
      to take samples over 20,000, 200,000, or 2,000,000 reptitions, or
      something of that order.

      Second, the task manager is showing you an average CPU usage over
      slices of time. Your program will finish in the blink of an eye and so
      won't really register on the task manager's CPU monitor.

      Third, since your program is doing nothing but processing, clearly
      _while it's running_ it's using up 100% of the CPU, so your results are
      not surprising.

        Comment

        • Sirisha
          #3
          Re: CPU usage amd memory usage

          Hi Bruce,

          I wnat to get the values that the task manager is showing for the memory
          usage and the CPU. How can i do that?
          --
          Sirisha


          "Bruce Wood" wrote:
          >
          Sirisha wrote:
          I am using the following code to get the CPU usage

          PerformanceCoun ter myCounter;
          myCounter = new PerformanceCoun ter();

          myCounter.Categ oryName = "Processor" ;
          myCounter.Count erName = "% Processor Time";
          myCounter.Insta nceName = "_Total";

          for(int i=0; i < 20; i++)
          myCounter.NextV alue();

          I ran this progam i am seeing values 0 or 100%, but when i see the task
          manager the CPU usage is 6 to 22 %.
          >
          First of all, 20 reptitions aren't going to show you anything. You need
          to take samples over 20,000, 200,000, or 2,000,000 reptitions, or
          something of that order.
          >
          Second, the task manager is showing you an average CPU usage over
          slices of time. Your program will finish in the blink of an eye and so
          won't really register on the task manager's CPU monitor.
          >
          Third, since your program is doing nothing but processing, clearly
          _while it's running_ it's using up 100% of the CPU, so your results are
          not surprising.
          >
          >

            Comment

            • Mugunth
              #4
              Re: CPU usage amd memory usage

              you must average out the CPU usage over a time slice.
              CPU is either busy or idle, never 60% busy at anypoint of time.
              When task manager reports 60% usage, it reports that, over a particular
              time slice,
              say 2000 ms, the CPU usage was 100% for 1200 ms.
              It should be interpreted like this.


              Instead of looping 20 times, check CPU usage over a period of time and
              average out your timing.

              Hope that helps...

              Mugunth

              On Oct 11, 1:43 am, Sirisha <spusap...@hotm ail.comwrote:
              Hi Bruce,
              >
              I wnat to get the values that the task manager is showing for the memory
              usage and the CPU. How can i do that?
              --
              Sirisha
              >
              "Bruce Wood" wrote:
              >
              Sirisha wrote:
              I am using the following code to get the CPU usage
              >
              PerformanceCoun ter myCounter;
              myCounter = new PerformanceCoun ter();
              >
              myCounter.Categ oryName = "Processor" ;
              myCounter.Count erName = "% Processor Time";
              myCounter.Insta nceName = "_Total";
              >
              for(int i=0; i < 20; i++)
              myCounter.NextV alue();
              >
              I ran this progam i am seeing values 0 or 100%, but when i see the task
              manager the CPU usage is 6 to 22 %.
              >
              First of all, 20 reptitions aren't going to show you anything. You need
              to take samples over 20,000, 200,000, or 2,000,000 reptitions, or
              something of that order.
              >
              Second, the task manager is showing you an average CPU usage over
              slices of time. Your program will finish in the blink of an eye and so
              won't really register on the task manager's CPU monitor.
              >
              Third, since your program is doing nothing but processing, clearly
              _while it's running_ it's using up 100% of the CPU, so your results are
              not surprising.

                Comment

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