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In this paper we present design rules for embedded multiprocessor systems that enable the derivation of the temporal behavior of stream-processing applications by means of dataflow analysis techniques. With these dataflow analysis techniques we can determine appropriate scheduler settings and buffer capacities such that real-time constraints are satisfied.(More)
A growing number of applications, often with real-time requirements, are integrated on the same system on chip (SoC), in the form of hardware and software intellectual property (IP). To facilitate real-time applications, networks on chip (NoC) guarantee bounds on latency and throughput. These bounds, however, only extend to the network interfaces (NI),(More)
In this paper an embedded multiprocessor system on top of a network on chip is proposed which is amenable for timing analysis. This multiprocessor system is intended for multimedia application that process data streams. The temporal behavior of applications executed on this multiprocessor system is derived with a Synchronous Data Flow (SDF) graph in which(More)
This paper presents a new multi-core architecture for in-car digital entertainment. Target functions vary from terrestrial reception, digital reception, and compressed audio, up to handsfree voice with acoustic echo cancellation and USB media playback, possibly in different user modes like single versus dual media sound. In the near future, new functions(More)
Embedded media applications have real-time constraints such as throughput and latency. In this paper we show that a tight bound on the minimum throughput can be computed with a cyclo static dataflow model that represents the application executed on the multiprocessor system-on-chip. We identify the sources that affect the tightness of the computed bound.(More)
A Network on Chip (NoC) with end-to-end flow control is modelled by a cyclo-static dataflow graph. Using the proposed model together with state-of-the-art dataflow analysis algorithms, we size the buffers in the network interfaces. We show, for a range of NoC designs, that buffer sizes are determined with a run time comparable to existing analytical(More)
Efficient use of the memory hierarchy is critical for achieving high performance in a multiprocessor system-on-chip. An external memory that is shared between processors is a bottleneck in current and future systems. Cache misses and a large cache miss penalty contribute to a low processor utilisation. In this paper, we describe a novel cache optimisation(More)
Providing real-time guarantees in complex, heterogeneous, and embedded multiprocessor systems is an important issue because they affect the perceived quality. Digital signal processing algorithms are often modeled with dataflow models. A guaranteed minimum throughput can be computed from such dataflow model. In this paper we analyze three causes for the(More)
In an embedded multiprocessor system the minimum throughput and maximum latency of real-time applications are usually derived given the worst-case execution time of the software tasks. Derivation of the worst-case execution time becomes easier if it is independent of the available communication bandwidth. In this paper we show that the worst-case execution(More)
Multiprocessor systems-on-chip (MPSoC) with distributed shared memory and caches are flexible when it comes to inter-processor communication but require an efficient memory consistency and cache coherency solution. In this paper we present a novel consistency model, streaming consistency, for the streaming domain in which tasks communicate through circular(More)