如何终止停止在PowerShell脚本中启动的线程 [英] How to kill threads started in PowerShell script on stop
问题描述
我有以下代码来刻录所有内核上的所有CPU:
I have the following code to burn all CPU on all cores:
<#
.SYNOPSIS
Script similar to BurnCpu Chaos Monkey
.DESCRIPTION
Using the largest int32 positive integer, this script calculates the factorial to generate 100% CPU utilisation.
The script fills all CPUs.
Source ForEach-Parallel: https://powertoe.wordpress.com/2012/05/03/foreach-parallel/
Source maxin out CPU of single core: https://dthomo.wordpress.com/2012/04/19/use-powershell-to-max-out-cpu-usage/
.EXAMPLE
Chaos-BurnCPU
#>.
function ForEach-Parallel {
param(
[Parameter(Mandatory=$true,position=0)]
[System.Management.Automation.ScriptBlock] $ScriptBlock,
[Parameter(Mandatory=$true,ValueFromPipeline=$true)]
[PSObject]$InputObject,
[Parameter(Mandatory=$false)]
[int]$MaxThreads=5
)
BEGIN {
$iss = [system.management.automation.runspaces.initialsessionstate]::CreateDefault()
$pool = [Runspacefactory]::CreateRunspacePool(1, $maxthreads, $iss, $host)
$pool.open()
$threads = @()
$ScriptBlock = $ExecutionContext.InvokeCommand.NewScriptBlock("param(`$_)`r`n" + $Scriptblock.ToString())
}
PROCESS {
$powershell = [powershell]::Create().addscript($scriptblock).addargument($InputObject)
$powershell.runspacepool=$pool
$threads+= @{
instance = $powershell
handle = $powershell.begininvoke()
}
}
END {
$notdone = $true
while ($notdone) {
$notdone = $false
for ($i=0; $i -lt $threads.count; $i++) {
$thread = $threads[$i]
if ($thread) {
if ($thread.handle.iscompleted) {
$thread.instance.endinvoke($thread.handle)
$thread.instance.dispose()
$threads[$i] = $null
}
else {
$notdone = $true
}
}
}
}
}
}
# Burn CPU of all cores.
$numberOfCores = (Get-WmiObject -Class win32_processor).NumberOfCores
(0..$numberOfCores) | ForEach-Parallel -MaxThreads $numberOfCores {
foreach ($number in 1..2147483647) {
$result = $result * $number
}
}
不幸的是,当脚本停止运行时,进程将继续运行并占用100%的CPU,直到我们终止进程为止.如何才能使END在ForEach-Parallel
函数中运行,或者以其他方式完成对线程的清理?
Unfortunately, when the script is stopped the process keeps running and keeps up 100% CPU until we kill the process. How can we accomplish that the END is run in the ForEach-Parallel
function or in an other way accomplish the threads are cleaned up?
推荐答案
使用运行空间的方法略有不同:
Here's a slightly different approach to using runspaces:
这使您可以在运行空间上指定超时.它还允许您将信息保留在Powershell实例的输出流中.您可以让脚本将其进程ID($ PID)写入到Verbose或Debug流中,然后使用该脚本来脚本杀死进程.
That lets you specify a timeout on the runspaces. It also allows you to preserve information in the output streams of powershell instances. You could have your script write it's process ID ($PID) to the Verbose or Debug stream, and use that to script killing the processes.
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