Time-Predictable Memory Arbitration for a Java Chip-Multiprocessor

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Provided by: Association for Computing Machinery
Topic: Hardware
Format: PDF
In this paper, the authors propose an approach to calculate Worst-Case Execution Times (WCET) of tasks running on a homogeneous Java multiprocessor. These processors access a shared main memory. Hence, the tasks running on different CPUs may influence the execution times of each other. Therefore, they implemented a time division multiple access arbiter that divides the memory access time into equal time slots, one time slot for each CPU. This memory arbitration allows calculating upper bounds for the execution time of Java bytecodes depending on the number of CPUs, the size of the time slot, and the memory access time.
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