/COUNTER:cfg Specifies a performance counter to include in data collection. cfg is counter configuration string with the ...

/COUNTER:cfg    Specifies a performance counter to include in data
                collection.  cfg is counter configuration string with
                the following format:

                    [,Reload[,Friendly Name]]

                You may specify more than one counter when trace profiling.
                Use the optional Reload parameter to specify an interrupt
                rate for sample based profiling.