You should have the opportunity to configure perfmon inputs at install time.
If re-installing the UF is not an option take a look at the bottom of this page for how to add entries to <install dir>\etc\system\local\inputs.conf
to forward perfmon data.
You'll need to restart the UF service for hte change to take effect.
Note :
Edit
For example add this to etc/system/local/inputs.conf (example from the link above) :
[perfmon://LocalMainMemory]
interval = 5
object = Memory
counters = Committed Bytes; Available Bytes; % Committed Bytes In Use
disabled = 0
index = main
and restart your service.
not sure where perfmon.conf or wmi.conf come into it.
Just add entries to inputs.conf and restart
I am not able to see perfmon.conf file in the default. shall I create the wmi.conf file?