By Akash Kumar, Henk Corporaal, Bart Mesman, Yajun Ha
ISBN-10: 9400700822
ISBN-13: 9789400700826
Modern multimedia structures have gotten more and more multiprocessor and heterogeneous to compare the excessive functionality and coffee strength calls for put on them by way of the big variety of purposes. The concurrent execution of those purposes factors interference and unpredictability within the functionality of those structures. In Multimedia Multiprocessor Systems, an research mechanism is gifted to appropriately are expecting the functionality of a number of functions executing simultaneously. With excessive patron call for the time-to-market has turn into considerably decrease. to deal with the complexity in designing such structures, an automatic design-flow is required which may generate platforms from a high-level architectural description such that they're no longer error-prone and eat much less time. this sort of layout technique is gifted for a number of use-cases -- combos of energetic purposes. A source supervisor can also be offered to regulate a few of the assets within the process, and to accomplish the objectives of functionality prediction, admission keep watch over and finances enforcement.
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Additional info for Multimedia Multiprocessor Systems: Analysis, Design and Management
Sample text
A cycle a1 , b1 , b2 , c2 , c3 , a3 , a1 is created without any token in it problem even more infeasible, since the transformation to HSDF may yield many actor copies. An exhaustive search through all the graphs to compute optimal static order is simply not feasible. We can therefore conclude that computing a static order for multiple applications is very compute intensive and infeasible. Further, the performance we obtain may not be optimal. However, the advantage of this approach is that we are guaranteed to achieve the performance that is analyzed for any static order at design-time provided the worst-case execution time estimates are correct.
Modeling Auto-concurrency The example in Fig. 1 brings a very interesting fact to notice. According to the model, since a1 requires only one token on the edge from a0 to fire, as soon as a0 has finished executing and produced two tokens, two executions of a1 can start si- 24 2 Application Modeling and Scheduling Fig. 2 SDF Graph after modeling auto-concurrency of 1 for the actor a1 multaneously. However, this is only possible if a1 is mapped and allowed to execute on multiple processors or hardware components simultaneously.
6 Steady-state is achieved after two executions of a0 and one of a1 shown earlier in Fig. 1, but now with three initial tokens on the edge from a2 to a0 . Consider further, that each of the three actors is mapped on a multi-processor system with three processors, P0 , P1 and P2 , such that actor ai is mapped on Pi for i = 0, 1, 2. Let us assume that the processors are connected to each other with a point-to-point connection with infinite bandwidth with directions similar to channels in the application graph.
Multimedia Multiprocessor Systems: Analysis, Design and Management by Akash Kumar, Henk Corporaal, Bart Mesman, Yajun Ha
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