find_extra_margin: Find Number of Cores As Extra Margin to Reach Targt
In carlonlv/DataCenterSim: Simulations for Data Centers

Find the extra number of cores needed in order to have the underperformed traces well performed.

find_extra_margin(
  target,
  cut_off_prob,
  window_size,
  granularity,
  adjustment_policy,
  cores = 1,
  result_path
)

`target`	A numeric vector representing the target for the traces to be well performed.
`cut_off_prob`	A numeric vector representing the cut off probabilities.
`window_size`	A numeric vector representing the window sizes.
`granularity`	A numeric value representing the granularity.
`adjustment_policy`	A list of numeric vectors of length 2.
`cores`	A numeric value representing the number of cores used for multiprocessing.
`result_path`	A string for the path where simulation results are stored.