What exactly is a CPU time stamp?

    The time stamp found in the PCA performance data file always
    expresses the CPU time from the start of the current program
    execution. In the data file, it is represented as 10-millisecond
    increments (number of CPU ticks), but to the user, it is always
    presented as milliseconds. This CPU time represents the total
    amount of CPU time consumed by the program and by the Collector
    from the time the program started executing.