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Theoretical real-time research generally neglects context switch times. But in recent embedded applications which consist of dozens of threads with very short execution times, their impact is too serious to be ignored. We present a hard real-time scheduling algorithm that perfectly hides the context switch times of an arbitrary number of threads. It requires a Simultaneous Multithreaded (SMT) processor...
Transactional memory is a promising, optimistic synchronization mechanism for chip-multiprocessor systems. The simplicity of atomic sections, instead of using explicit locks, is also appealing for real-time systems. In this paper an implementation of real-time transactional memory (RTTM) in the context of a real-time Java chip-multiprocessor (CMP) is presented. To provide a predictable and analyzable...
The Merasa project aims to achieve a breakthrough in hardware design, hard real-time support in system software, and worst-case execution time analysis tools for embedded multicore processors. The project focuses on developing multicore processor designs for hard real-time embedded systems and techniques to guarantee the analyzability and timing predictability of every feature provided by the processor.
Today, mobile and embedded real-time systems have to cope with the migration and allocation of multiple software tasks running on top of a real-time operating system (RTOS) residing on one or multiple system processors. Abstract RTOS simulations and timing analysis applies for fast and early estimation to configure it towards the individual needs of the application and environment. In this context,...
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