By Marcus T Schmitz; Bashir Al-Hashimi; Petru Eles
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Additional info for System-level design techniques for energy-efficient embedded systems
B) Once an optimised assembly code has been generated‚ the low-level code generation is carried out by processor specific assemblers that translate the assembler code into executable machine code. There exist also techniques for compiler-based power minimisation such as instruction reordering and reduction of memory accesses [94‚ 145‚ 146]. Further‚ sizeable power saving can be obtained through a careful algorithmic design at the source code level . Clearly‚ such software power minimisation approaches and system-level energy management techniques do not exclude each other.
2)‚ which transforms an abstract specification into an architectural description of a mixed hardware/software system. 2). ‚ the specification fragments (tasks) that have been distributed among the hardware and software components of the system need to be realised. This is achieved through two separate‚ yet concurrent synthesis steps: hardware synthesis and software synthesis. ‚ the interaction between hardware and software can be co-simulated . Note‚ whereas system-level co-synthesis targets the design of interacting components‚ the main aim of hardware and software synthesis is the design of the individual hardware components and the software tasks running on programmable processors.
2. 6ms is reached. These slacks can be used to extend the task execution times. 8). , all tasks mapped to the same PE are assumed to consume the same constant amount of power, and (b) a more generalised and realistic power model allowing for power variations among the tasks (as proposed in this work). One approach to optimise the energy dissipation, which neglects the power profile, is to distribute the slack time evenly among the tasks, that is, in the given example each task is “stretched” using the same extension factor .
System-level design techniques for energy-efficient embedded systems by Marcus T Schmitz; Bashir Al-Hashimi; Petru Eles