powershell - PowerShell:为每个计数器计算rawvalue属性的连续值之间的增量

Question

'晚间，

我是PowerShell脚本编制(以及本站点)的新手，并且需要编写一个脚本，该脚本可以:

几次收集性能计数器(在本例中为TCP)

计算每个计数器的rawvalue属性的连续值之间的差

规定脚本在每个间隔T内迭代N次性能计数器，并且所说的性能计数器是“A”和“B”，并且我们从0开始计数，它需要执行以下计算:

A[1st] - A[0th], 
A[2nd] - A[1st], 
A[3rd] - A[2nd]
...  

目前，该脚本仅两次遍历计数器(在这种情况下，N = 2)。目的是能够“多次”(例如几百次)遍历这些计数器。

当前，脚本将每个计数器的原始值读取到单个数组中。这里是:

$cntr = (get-counter -listset tcpv4).paths
$arry = @()

for ($i=0; $i -lt 2; $i++) {
    write-host "`nThis is iteration $i`n"
    foreach ($elmt in $cntr) {
        $z = (get-counter -counter $elmt).countersamples[0].rawvalue
        $arry = $arry + $z
        write-host "$elmt is: $z`n"
    }
}

运行此脚本时，将得到如下输出:

This is iteration 0

\TCPv4\Segments/sec is: 24723

\TCPv4\Connections Established is: 27

\TCPv4\Connections Active is: 796

\TCPv4\Connections Passive is: 47

\TCPv4\Connection Failures is: 158

\TCPv4\Connections Reset is: 412

\TCPv4\Segments Received/sec is: 14902

\TCPv4\Segments Sent/sec is: 9822

\TCPv4\Segments Retransmitted/sec is: 199


This is iteration 1

\TCPv4\Segments/sec is: 24727

\TCPv4\Connections Established is: 27

\TCPv4\Connections Active is: 798

\TCPv4\Connections Passive is: 47

\TCPv4\Connection Failures is: 159

\TCPv4\Connections Reset is: 412

\TCPv4\Segments Received/sec is: 14903

\TCPv4\Segments Sent/sec is: 9824

\TCPv4\Segments Retransmitted/sec is: 200

例如“\ TCPv4 \ Segments Retransmitted / sec”计数器的rawvalue属性的两个值分别是$ arry [8]和$ arry [17]。为了得出我正在使用的两者之间的差异:

write-host "The difference between the successive counters for $($cntr[-1]) is $($($arry[17]) - $($arry[8]))."

任何帮助将不胜感激。

Answer 1

我戳了一下，结果掉了下来:

$cntr = (get-counter -listset tcpv4).paths
$LastValue = @{}

Get-Counter $cntr -SampleInterval 2 -MaxSamples 5 |
foreach {
  foreach ($Sample in $_.CounterSamples)
   {
     $ht = [Ordered]@{
        Counter   = $Sample.path.split('\')[-1]
        TimeStamp = $_.TimeStamp
        RawValue  = $Sample.RawValue
        LastValue = $LastValue[$Sample.Path]
        Change    = $Sample.RawValue - $LastValue[$Sample.Path]
        }
     if ($LastValue.ContainsKey($Sample.path))
       { [PSCustomObject]$ht }
     $LastValue[$Sample.Path] = $Sample.RawValue
   }
 } 

编辑:

这应该适用于V2:

$cntr = (get-counter -listset tcpv4).paths
$LastValue = @{}

Get-Counter $cntr -SampleInterval 10 -MaxSamples 3 |
foreach {
  foreach ($Sample in $_.CounterSamples)
   {
     $Object = '' | 
      Select-Object Counter,TimeStamp,RawValue,LastValue,Change
      $Object.Counter   = $Sample.path.split('\')[-1]
      $Object.TimeStamp = $_.TimeStamp
      $Object.RawValue  = $Sample.RawValue
      $Object.LastValue = $LastValue[$Sample.Path]
      $Object.Change    = $Sample.RawValue - $LastValue[$Sample.Path]

     if ($LastValue.ContainsKey($Sample.path))
       { $Object }

     $LastValue[$Sample.Path] = $Sample.RawValue
   }
 }