== Windows/PowerShell/TopCpuMem.ps1 ==

{{{
if ($args[0] -eq $null) {
  $SortCol = "Memory"
} else {
  $SortCol = $args[0]
}


if ($args[1] -eq $null) {
  $Top = 30
} else {
  $Top = $args[1]
}



$LogicalProcessors = (Get-WmiObject -class Win32_processor -Property NumberOfLogicalProcessors).NumberOfLogicalProcessors;


function myTopFunc ([string]$SortCol = "Memory", [int]$Top = 30) {
  ## Check user level of PowerShell
  if (
    ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()
    ).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
  )
  {
    $procTbl = get-process -IncludeUserName | select ID, Name, UserName, Description, MainWindowTitle
  } else {
    $procTbl = get-process | select ID, Name, Description, MainWindowTitle
  }


  Get-Counter `
    '\Process(*)\ID Process',`
    '\Process(*)\% Processor Time',`
    '\Process(*)\Working Set - Private'`
    -ea SilentlyContinue |
  foreach CounterSamples |
  where InstanceName -notin "_total","memory compression" |
  group { $_.Path.Split("\\")[3] } |
  foreach {
    $procIndex = [array]::indexof($procTbl.ID, [Int32]$_.Group[0].CookedValue)
    [pscustomobject]@{
      Name = $_.Group[0].InstanceName;
      ID = $_.Group[0].CookedValue;
      User = $procTbl.UserName[$procIndex]
      CPU = if($_.Group[0].InstanceName -eq "idle") {
        $_.Group[1].CookedValue / $LogicalProcessors
        } else {
        $_.Group[1].CookedValue
      };
      Memory = $_.Group[2].CookedValue / 1KB;
      Description = $procTbl.Description[$procIndex];
      Title = $procTbl.MainWindowTitle[$procIndex];
    }
  } |
  sort -des $SortCol |
  select -f $Top @(
    "Name", "ID", "User",
    @{ n = "CPU"; e = { ("{0:N1}%" -f $_.CPU) } },
    @{ n = "Memory"; e = { ("{0:N0} K" -f $_.Memory) } },
    "Description", "Title"
  ) | ft -a
}
myTopFunc -SortCol $SortCol -top $Top



}}}