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Next, we introduce the protocol stack and show how it enables diversity, both in the application programming models and in the IP interfaces Section 2. Composable and predictable services require allocation of resources.
Prior to the allocation, however, the resources must be dimensioned. Additionally, the resources must enable an allocation to be instantiated and enforced.
Resource allocation is the process of assigning the resources of the interconnect of Chapter 3 to the individual applications, based on their requirements and the use-case constraints. Allocations are created and verified at design or compile time.
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Hence, run-time choices are confined to choosing from the set of fixed allocations. While limiting the run-time choices to a set of predefined use-cases, this is key as it enables us to guarantee, at compile time, that all application constraints are satisfied, and that all the use-cases fit on the given hardware resources.
In this chapter, which corresponds to Step 2 in Fig. After completing the dimensioning and allocation, the interconnect can be instantiated.
An instantiation consists of two parts. Second, the software, comprising the resource allocations and the appropriate run-time libraries.
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With both the hardware and software in place, the entire interconnect can be simulated or synthesised. In the previous chapters, we have seen how the communication requirements of the applications are turned into a complete interconnect instance. The allocation of communication requirements, however, only covers the network and excludes the effects of end-to-end flow control.
When NI ports are added as part of the dimensioning in Chapters 3 and 4, all buffers are given a default size, and until now we have assumed that the buffers are sufficiently large. Using our example system from Chapter 1, we have seen how the interconnect is dimensioned, how resources are allocated and how the resulting hardware and software is instantiated and verified. In this chapter, we take the last step and demonstrate the diversity, composability, predictability, reconfigurability and automation of our interconnect by creating an actual system instance.
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In this chapter we exercise the proposed interconnect and design flow on two large-scale examples that have close connection to real industrial products. In contrast to Chapter 7, where we focus on the qualitative concepts and study a few applications in detail, we now turn to larger scale examples that represent state-of-the-art SoCs for consumer multimedia applications. The presentation offers a systems perspective, starting from the system requirements and deriving and describing the resulting hardware architectures, embedded software, and accompanying design flow. Readers get an in depth view of the interconnect requirements, not centered only on performance and scalability, but also the multi-faceted, application-driven requirements, in particular composability and predictability.
Library Of American University Of Madaba Catalog › MARC Details for Record No.
The book shows how these qualitative requirements are implemented in a state-of-the-art on-chip interconnect, and presents the realistic, quantitative costs. Topical term or geographic name as entry element Computer aided design. Topical term or geographic name as entry element Systems engineering. Topical term or geographic name as entry element Engineering.