By Antonio Carlos Schneider Beck, Carlos Arthur Lang Lisbôa, Luigi Carro
As embedded platforms develop into extra complicated, designers face a few demanding situations at diverse degrees: they should strengthen functionality, whereas maintaining strength intake as little as attainable, they should reuse existent software program code, and while they should make the most of the additional good judgment on hand within the chip, represented by way of a number of processors operating jointly. This booklet describes a number of suggestions to accomplish such diversified and interrelated ambitions, by way of adaptability. insurance contains reconfigurable structures, dynamic optimization concepts reminiscent of binary translation and hint reuse, new reminiscence architectures together with homogeneous and heterogeneous multiprocessor platforms, verbal exchange matters and NOCs, fault tolerance opposed to fabrication defects and smooth blunders, and at last, how you can mix numerous of those thoughts jointly to accomplish better degrees of functionality and flexibility. The dialogue additionally comprises the way to hire really good software program to enhance this new adaptive procedure, and the way this new type of software program has to be designed and programmed.
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Additional info for Adaptable Embedded Systems
8 Different pieces of reconfigurable logic are used to speed up the entire loop Fig. 9 Infinite configurations available for (a) subroutine optimization: each one would take five cycles to be executed. B. Rutzig et al. In the experiment presented in Fig. 9a, b, it is considered that the execution of each code sequence would take five cycles. In comparison with Fig. 7 (same experiment, but using the previous methodology), huge improvements are shown, mainly when considering subroutine optimizations.
CRC32 Bitcount 0 Fig. 1 Instruction per branch rate on reconfigurable logic, we discuss reconfiguration and execution times, and the growing number of applications being executed at the same time on a system. 1 Heterogeneous Behavior of the Applications In this study, a subset of the MiBench Benchmark Suite  that represents a complete set of diverse algorithm behaviors is used. g. SPEC2000 . We have evaluated the following 18 applications: Quicksort, Susan Corners/Edges/Smoothing, Jpeg Encoder/Decoder, Dijkstra, Patricia, StringSearch, Rinjdael Encode/Decode, SHA, Raw Audio Coder/Decoder, GSM Coder/Decoder, Bitcount and CRC32.
3 The Importance of the Operating System In this section we aim to demonstrate the impact of the operating system (OS) code on the application execution, and the need for its optimization. In addition, we show that a fine grained hardware accelerator, similar to the one presented in the previous section, is capable of achieving good performance improvements in both the application and the OS codes. To evaluate the operating system impact in the whole execution time, we have chosen a software workload that reflects an embedded system environment.
Adaptable Embedded Systems by Antonio Carlos Schneider Beck, Carlos Arthur Lang Lisbôa, Luigi Carro