How well can data temporal consistency be maintained?

A model of hard real-time systems where tasks access shared data is presented, and temporal consistency is defined in terms of the age and dispersion of data. Based on this model, two variants of a multiversion lock-based concurrency control algorithm and two priority-driven preemptive scheduling algorithms, rate-monotone and earliest-deadline-first, are evaluated. Simulation results indicate how well data temporal consistency is maintained for different workload characteristics. These results can be used to guide the design of applications; by avoiding undesirable parameters, it is made easier to maintain data temporal consistency.<
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