By Sorin Manolache
ISBN-10: 1402055056
ISBN-13: 9781402055058
ISBN-10: 1402055099
ISBN-13: 9781402055096
This publication offers 3 ways to the research of the time limit pass over ratio of functions with stochastic activity execution instances. every one most closely fits a unique context: a precise one successfully appropriate to monoprocessor structures; an approximate one, which permits for designer-controlled trade-off among research accuracy and research velocity; and one much less actual yet sufficiently quick with a view to be positioned inside of optimization loops.
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Extra info for Real-Time Applications with Stochastic Task Execution Times: Analysis and Optimisation
Example text
Note that inside a PMI no new task instantiation can arrive, and that the task ordering according to their priorities is unchanged. Thus, it is impossible that the next state sk of a current state sj would be one that contains waiting tasks of higher priority than those waiting in sj . Hence, the second criterion reads: among states with the same PMI, one should choose the one with the waiting task of highest priority. 4). The shades of the states denote their PMI number. The lighter the shade is, the smaller is its PMI number.
The job executions are depicted as rectangles stretching from the point on the Ox axis that corresponds to the start time of the job execution to the point on the Ox axis that corresponds to its finishing time. The different task graphs are depicted in different shades in this figure. Vertical lines of different line patterns are used for better readability. Job 2 of task t10 arrives at time 6 and is ready to run. However, processing element P E3 is busy executing task t8 . 5. 5. At time 9, job 3 of task t10 arrives and is ready to run.
Large prime numbers have a lower probability to be picked, but it occurs nevertheless. In the following, we report on six sets of experiments. The first four investigate the impact of the enumerated factors (LCM , the number of tasks, the task dependencies, the maximum allowed number of concurrently active instantiations of the same task graph) on the analysis complexity. 3. EXPERIMENTAL RESULTS 47 its impact on the analysis complexity. The sixth experiment is based on a real-life example from the area of telecommunication systems.
Real-Time Applications with Stochastic Task Execution Times: Analysis and Optimisation by Sorin Manolache
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