Use Esxtop to Get Information on the Virtual CPUs of a Virtual Machine

You can use the Get-EsxTop cmdlet to retrieve real-time data for troubleshooting performance problems.

Prerequisites

Verify that you are connected to a server that runs ESX 4.1, vCenter Server 5.0 or later.

Procedure

$group = Get-EsxTop -CounterName SchedGroup | where {$_.VMName -eq $vm.Name}
$gr = Get-EsxTop -TopologyInfo -Topology SchedGroup | %{$_.Entries} | where {$group.GroupID -contains $_.GroupId} $group.GroupID
$cpuIds = @()
$gr.CpuClient | %{$cpuIds += $_.CPUClientID}
$cpuStats = Get-EsxTop -CounterName VCPU | where {$cpuIds -contains $_.VCPUID}
$result = @()
$cpuStats | %{ `
$row = "" | select VCPUID, Used, Ready; `
$row.VCPUID = $_.VCPUID; `
$row.Used = [math]::Round(([double]$_.UsedTimeInUsec/[double]$_.UpTimeInUsec)*100, 2); `
$row.Ready = [math]::Round(([double]$_.ReadyTimeInUsec/[double]$_.UpTimeInUsec)*100, 2);` 
$result += $row
}
$result | Format-Table –AutoSize

1	Get the group to which the virtual machine belongs and save it as a variable. $group = Get-EsxTop -CounterName SchedGroup \| where {$_.VMName -eq $vm.Name}
2	Get the IDs of all virtual CPUs of the virtual machine and store them in an array. $gr = Get-EsxTop -TopologyInfo -Topology SchedGroup \| %{$_.Entries} \| where {$group.GroupID -contains $_.GroupId} $group.GroupID $cpuIds = @() $gr.CpuClient \| %{$cpuIds += $_.CPUClientID}
3	Get the CPU statistics for the virtual machine. $cpuStats = Get-EsxTop -CounterName VCPU \| where {$cpuIds -contains $_.VCPUID}
4	Calculate the used and ready for use percentage by using the UsedTimeInUsec and ReadyTimeInUsec stats. $result = @() $cpuStats \| %{ ` $row = "" \| select VCPUID, Used, Ready; ` $row.VCPUID = $_.VCPUID; ` $row.Used = [math]::Round(([double]$_.UsedTimeInUsec/[double]$_.UpTimeInUsec)100, 2); ` $row.Ready = [math]::Round(([double]$_.ReadyTimeInUsec/[double]$_.UpTimeInUsec)100, 2);` $result += $row }
5	View the used and ready for use percentage for each virtual CPU of the virtual machine. $result \| Format-Table –AutoSize