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Schedulability

• Real-time OS must decide at process admission time whether all deadlines can be met.
• General result for RMPA [LL73]: Can do if
  
  $$\sum_{i=1}^N \frac{C_i}{T_i} < N \left(2^{1/N}-1\right).$$
  
  

• This is a sufficient (but not necessary) condition.

Limit (%):

N	1	2	3	4	5	10
	100.0	82.8	78.0	75.7	74.3	71.8	69.3

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