The name of the process with the most CPU usage

Question

I have a Samurize config that shows a CPU usage graph similar to the task manager.

How can I also display the process name with the current percentage of CPU usage?

I would like it to be updated, at most, once per second. Samurize can invoke the command line tool and display it on the screen, so this could also be an option.

---

Further clarification:

I learned how to write my own C # .NET command-line application to list the array returned from System.Diagnostics.Process.GetProcesses (), but the Process instance class does not seem to include the CPU percent property.

Is there any way to calculate this?

Answer 1

With PowerShell:

Get-Process | Sort-Object CPU -desc | Select-Object -first 3 | Format-Table CPU,ProcessName -hidetableheader

returns somewhat like:

  16.8641632 System
   12.548072 csrss
  11.9892168 powershell

Answer 2

What do you want to get from the instant use of the CPU (view) ...

In fact, instant CPU usage for the process does not exist. Instead, you need to take two measurements and calculate the average CPU usage, the formula is quite simple:

AvgCpuUsed = [TotalCPUTime (process, time2) - TotalCPUTime (process, time1)] / [time2-time1]

Time2 Time1, "" . Windows . , , , 5 , ...

, -,

    using System.Diagnostics;

float GetAverageCPULoad(int procID, DateTme from, DateTime, to)
{
  // For the current process
  //Process proc = Process.GetCurrentProcess();
  // Or for any other process given its id
  Process proc = Process.GetProcessById(procID);
  System.TimeSpan lifeInterval = (to - from);
  // Get the CPU use
  float CPULoad = (proc.TotalProcessorTime.TotalMilliseconds / lifeInterval.TotalMilliseconds) * 100;
  // You need to take the number of present cores into account
  return CPULoad / System.Environment.ProcessorCount;
}

"" :

 class ProcLoad
{
  // Last time you checked for a process
  public Dictionary<int, DateTime> lastCheckedDict = new Dictionary<int, DateTime>();

  public float GetCPULoad(int procID)
  {
    if (lastCheckedDict.ContainsKey(procID))
    {
      DateTime last = lastCheckedDict[procID];
      lastCheckedDict[procID] = DateTime.Now;
      return GetAverageCPULoad(procID, last, lastCheckedDict[procID]);
    }
    else
    {
      lastCheckedDict.Add(procID, DateTime.Now);
      return 0;
    }
  }
}

( , ) , , , Process.GetProcesses

Answer 3

( . this post), , Get-Process, :

$sampleInterval = 3

$process1 = Get-Process |select Name,Id, @{Name="Sample1CPU"; Expression = {$_.CPU}}

Start-Sleep -Seconds $sampleInterval

$process2 = Get-Process | select Id, @{Name="Sample2CPU"; Expression = {$_.CPU}}

$samples = Join-Object -Left $process1 -Right $process2 -LeftProperties Name,Sample1CPU -RightProperties Sample2CPU -Where {$args[0].Id -eq $args[1].Id}

$samples | select Name,@{Name="CPU Usage";Expression = {($_.Sample2CPU-$_.Sample1CPU)/$sampleInterval * 100}} | sort -Property "CPU Usage" -Descending | select -First 10 | ft -AutoSize

Name                  CPU Usage
----                  ---------
firefox        20.8333333333333
powershell_ise 5.72916666666667
Battle.net               1.5625
Skype                    1.5625
chrome                   1.5625
chrome         1.04166666666667
chrome         1.04166666666667
chrome         1.04166666666667
chrome         1.04166666666667
LCore          1.04166666666667

Answer 4

Pmon.exe . Windows Resource Kit ( Server 2003, , -, XP ).

Answer 5

Process.TotalProcessorTime

http://msdn.microsoft.com/en-us/library/system.diagnostics.process.totalprocessortime.aspx

Answer 6

, . , , , , . powershell:

$procID = 4321

$time1 = Get-Date
$cpuTime1 = Get-Process -Id $procID | Select -Property CPU

Start-Sleep -s 2

$time2 = Get-Date
$cpuTime2 = Get-Process -Id $procID | Select -Property CPU

$avgCPUUtil = ($cpuTime2.CPU - $cpuTime1.CPU)/($time2-$time1).TotalSeconds *100 / [System.Environment]::ProcessorCount

Answer 7

: -

public Process getProcessWithMaxCPUUsage()
    {
        const int delay = 500;
        Process[] processes = Process.GetProcesses();

        var counters = new List<PerformanceCounter>();

        foreach (Process process in processes)
        {
            var counter = new PerformanceCounter("Process", "% Processor Time", process.ProcessName);
            counter.NextValue();
            counters.Add(counter);
        }
        System.Threading.Thread.Sleep(delay);
        //You must wait(ms) to ensure that the current
        //application process does not have MAX CPU
        int mxproc = -1;
        double mxcpu = double.MinValue, tmpcpu;
        for (int ik = 0; ik < counters.Count; ik++)
        {
            tmpcpu = Math.Round(counters[ik].NextValue(), 1);
            if (tmpcpu > mxcpu)
            {
                mxcpu = tmpcpu;
                mxproc = ik;
            }

        }
        return processes[mxproc];
    }

: -

static void Main()
    {
        Process mxp=getProcessWithMaxCPUUsage();
        Console.WriteLine(mxp.ProcessName);
    }

Answer 8

-

Get-Process | Sort-Object CPU -desc | Select-Object -first 3 | Format-Table CPU,ProcessName,TotalProcessorTime -hidetableheader

. .

Get-Counter '\Process(*)\% Processor Time' | Select-Object -ExpandProperty countersamples | Select-Object -Property instancename, cookedvalue| Sort-Object -Property cookedvalue -Descending| Select-Object -First 10| ft -AutoSize