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.

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