从作业中返回性能计数器结果

Question

我有以下脚本运行作业中的性能计数器：

$counter = {
  param($TestLength)
  $perfsample = Get-Counter -Counter `
  "\PhysicalDisk(_Total)\% Disk Time",`
  "\Processor(_Total)\% Processor Time",`
  "\Process(_Total)\Working Set",`
  "\Network Interface(*)\Bytes Total/Sec"`
  -SampleInterval 1 -MaxSamples $TestLength -ErrorAction SilentlyContinue

  $perfsample
}

Start-Job -Name GettingCounters -ScriptBlock $counter -ArgumentList $TestLength | Wait-Job

Export-Counter -Path $DestinationFile -FileFormat csv -InputObject (Receive-Job GettingCounters)

当运行上述代码时，出现以下错误：

Export-Counter : Cannot bind parameter 'InputObject'. Cannot convert the "Micro
soft.PowerShell.Commands.GetCounter.PerformanceCounterSampleSet" value of type
"Deserialized.Microsoft.PowerShell.Commands.GetCounter.PerformanceCounterSample
Set" to type "Microsoft.PowerShell.Commands.GetCounter.PerformanceCounterSample
Set".

我知道这是因为输出被序列化了，所以是否可以 return 反序列化输出？

Answer 1

不幸的是，所有类型都不是可序列化的。为什么不导出作业内部？

$counter = {
  param($TestLength, $DestinationFile)
  $perfsample = Get-Counter -Counter `
  "\PhysicalDisk(_Total)\% Disk Time",`
  "\Processor(_Total)\% Processor Time",`
  "\Process(_Total)\Working Set",`
  "\Network Interface(*)\Bytes Total/Sec"`
  -SampleInterval 1 -MaxSamples $TestLength -ErrorAction SilentlyContinue

  $perfsample | Export-Counter -Path $DestinationFile -FileFormat csv
}

Start-Job -Name GettingCounters -ScriptBlock $counter -ArgumentList $TestLength, $DestinationFile | Wait-Job

作为替代方案，您可以使用运行spaces 而不是作业，因为它们不需要对象序列化并且通常更快（至少当您使用 RunspacePool 来运行多个线程时并行）。不过，还有几行可以使用它：

$DestinationFile = ".\Desktop\test.csv"
$TestLength = 10

$counter = {
  param($TestLength)
  $perfsample = Get-Counter -Counter `
  "\PhysicalDisk(_Total)\% Disk Time",`
  "\Processor(_Total)\% Processor Time",`
  "\Process(_Total)\Working Set",`
  "\Network Interface(*)\Bytes Total/Sec"`
  -SampleInterval 1 -MaxSamples $TestLength -ErrorAction SilentlyContinue

  $perfsample
}

$Powershell = [powershell]::Create()
$Powershell.AddScript($counter)
$Powershell.AddParameter("TestLength",$TestLength)
$job = $Powershell.BeginInvoke()

#Get results
$result = $Powershell.EndInvoke($job)
$result | Export-Counter -Path $DestinationFile -FileFormat csv

#Cleanup
$Powershell.Dispose()
$Powershell = $null
$job = $null

从作业中返回性能计数器结果

Returning performance counter results from within a job

powershell

perfmon