PowerShell作业与启动过程

我做了一个小诊断脚本保存在我的 $profile .在收集CPU名称时,我发现该命令大约需要4秒钟 (Get-WmiObject -Class Win32_Processor).Name .所以我想我会尝试PowerShell作业,虽然我认为它们对长时间的后台作业非常有用,但如果你只想在后台快速获取一小段信息,初始化时间会很尴尬(比如每个作业2-3秒),所以我想我会在脚本其余部分运行时使用Start Process在临时文件中转储值。我想我这样做是正确的,但是如果你运行这个函数3到4次,你会注意到CPU名称没有填充。

使用这样的启动过程是最佳的,还是有人有更快的方法在后台并行启动小任务?我知道有一个问题。NET实现这一点的方法(但从我看到的情况来看,它似乎超级复杂)?

你知道为什么我的“等待文件被创建并且在访问它之前是非零的”经常失败吗?

function sys {
    $System = get-wmiobject -class "Win32_ComputerSystem"
    $Mem = [math]::Ceiling($System.TotalPhysicalMemory / 1024 / 1024 / 1024)

    $wmi = gwmi -class Win32_OperatingSystem -computer "."
    $LBTime = $wmi.ConvertToDateTime($wmi.Lastbootuptime)
    [TimeSpan]$uptime = New-TimeSpan $LBTime $(get-date)
    $s = "" ; if ($uptime.Days -ne 1) {$s = "s"}
    $uptime_string = "$($uptime.days) day$s $($uptime.hours) hr $($uptime.minutes) min $($uptime.seconds) sec"

    $temp_cpu = "$($env:TEMP)\ps_temp_cpu.txt"
    $temp_cpu_cores = "$($env:TEMP)\ps_temp_cpu_cores.txt"
    $temp_cpu_logical = "$($env:TEMP)\ps_temp_cpu_logical.txt"
    rm -force $temp_cpu -EA silent ; rm -force $temp_cpu_cores -EA silent ; rm -force $temp_cpu_logical -EA silent
    Start-Process -NoNewWindow -FilePath "powershell.exe" -ArgumentList "-NoLogo -NoProfile (Get-WmiObject -Class Win32_Processor).Name > $temp_cpu"
    Start-Process -NoNewWindow -FilePath "powershell.exe" -ArgumentList "-NoLogo -NoProfile (Get-WmiObject -Class Win32_Processor).NumberOfCores > $temp_cpu_cores"
    Start-Process -NoNewWindow -FilePath "powershell.exe" -ArgumentList "-NoLogo -NoProfile (Get-WmiObject -Class Win32_Processor).NumberOfLogicalProcessors > $temp_cpu_logical"
    ""
    "Hostname:          $($System.Name)"
    "Domain:            $($System.Domain)"
    "PrimaryOwner:      $($System.PrimaryOwnerName)"
    "Make/Model:        $($System.Manufacturer) ($($System.Model))"  #     "ComputerModel:  $((Get-WmiObject -Class:Win32_ComputerSystem).Model)"
    "SerialNumber:      $((Get-WmiObject -Class:Win32_BIOS).SerialNumber)"
    "PowerShell:        $($PSVersionTable.PSVersion)"
    "Windows Version:   $($PSVersionTable.BuildVersion)"
    "Windows ReleaseId: $((Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name 'ReleaseId').ReleaseId)"
    "Display Card:      $((Get-WmiObject -Class:Win32_VideoController).Name)"
    "Display Driver:    $((Get-WmiObject -Class:Win32_VideoController).DriverVersion)"
    "Display ModelDesc: $((Get-WmiObject -Class:Win32_VideoController).VideoModeDescription)"
    "Last Boot Time:    $([Management.ManagementDateTimeConverter]::ToDateTime((Get-WmiObject Win32_OperatingSystem | select 'LastBootUpTime').LastBootUpTime))"   # $(wmic OS get LastBootupTime)
    "Uptime:            $uptime_string"
    # ipconfig | sls IPv4
    Get-Netipaddress | where AddressFamily -eq IPv4 | select IPAddress,InterfaceIndex,InterfaceAlias | sort InterfaceIndex

    # Get-PSDrive | sort -Descending Free | Format-Table
    # https://stackoverflow.com/questions/37154375/display-disk-size-and-freespace-in-gb
    # https://www.petri.com/checking-system-drive-free-space-with-wmi-and-powershell
    # https://www.oxfordsbsguy.com/2017/02/08/powershell-how-to-check-for-drives-with-less-than-10gb-of-free-diskspace/
    # Get-Volume | Where-Object {($_.SizeRemaining -lt 10000000000) -and ($_.DriveType -eq “FIXED”) -and ($_.FileSystemLabel -ne “System Reserved”)}
    gwmi win32_logicaldisk | Format-Table DeviceId, VolumeName, @{n="Size(GB)";e={[math]::Round($_.Size/1GB,2)}},@{n="Free(GB)";e={[math]::Round($_.FreeSpace/1GB,2)}}

    # Note: -EA silent on Get-Item otherwise get an error
    while (!(Test-Path $temp_cpu)) { while ((Get-Item $temp_cpu -EA silent).length -eq 0kb) { Start-Sleep -Milliseconds 500 } }
    "CPU:               $(cat $temp_cpu)"
    while (!(Test-Path $temp_cpu_cores)) { while ((Get-Item $temp_cpu_cores -EA silent).length -eq 0kb) { Start-Sleep -Milliseconds 500 } }
    "CPU Cores:         $(cat $temp_cpu_cores)"
    while (!(Test-Path $temp_cpu_logical)) { while ((Get-Item $temp_cpu_logical -EA silent).length -eq 0kb) { Start-Sleep -Milliseconds 500 } }
    "CPU Logical:       $(cat $temp_cpu_logical)"
    rm -force $temp_cpu -EA silent ; rm -force $temp_cpu_cores -EA silent ; rm -force $temp_cpu_logical -EA silent
    "Memory:            $(Get-CimInstance Win32_PhysicalMemory | Measure-Object -Property capacity -Sum | Foreach {"{0:N2}" -f ([math]::round(($_.Sum / 1GB),2))}) GB"
    ""
    "Also note the 'Get-ComputerInfo' Cmdlet (has more info but slower to run)"
    ""
}