Constructor Detail

• IoTimeBudget

  public IoTimeBudget()

Method Detail

• reset

  public void reset(long[] partialBudget)

  (Re-)initialize the IO time budget, that is, the time that can be spent in blocking IO.

  Parameters:

  partialBudget - Initial budget for priority levels 0 through n. The budget for level i>j must always be smaller-equal the budget for level j.

• clear

  public void clear()

  Set the budget to 0 (for all levels).

• timeLeft

  public long timeLeft(int level)

  Returns how much time is left for the specified priority level.

  Parameters:

  level - priority level. must be greater ≥ 0.

  Returns:

  time left for the specified priority level.

• use

  public void use(long t,
                  int level)

  Use the specified amount of time of the specified level. t is subtracted from the budgets of level level and smaller. If by this, the remaining budget of level becomes smaller than the remaining budget of level + 1, then this is reduced too. (And the same for higher levels.)

  Parameters:

  t - how much time to use.

  level - priority level. must be greater ≥ 0.

• estimateTimeLeft

  public long estimateTimeLeft(int level)

  Returns how much time is left for the specified priority level.

  Parameters:

  level - priority level. must be greater ≥ 0.

  Returns:

  time left for the specified priority level.