Title :
Early Modeling of Linux-Based RTOS Platforms in a SystemC Time-Approximate Co-simulation Environment
Author :
Posadas, H. ; Villar, E. ; Ragot, Dominique ; Martinez, Marcos
Author_Institution :
Microelectron. Eng. Group, Univ. of Cantabria, Santander, Spain
Abstract :
The increase of computational power in embedded systems has allowed integrating together hard real-time tasks and rich applications. Complex SW infrastructures containing both RTOS and GPOS are required to handle this complexity. To optimally map system functionality to the hard-RT SW domain, to the general purpose SW domain or to HW peripherals, early performance evaluations at the first steps of the design process are required. Approximate timed co-simulation has been proposed as a fast solution for system modeling at early design steps. This co-simulation technique allows simulating systems at speed close to functional execution, while considering timing effects. As a consequence, system performance estimations can be obtained early, allowing efficient design space exploration and system refinement. To achieve fast simulation speed, the SW code is pre-annotated with time information. The annotated code is then natively executed, performing what is called native-based co-simulation. Previous native-based simulation environments are not prepared to model multi-OS systems, so the performance evaluation of the different SW domains is not possible. This paper proposes a new embedded system modeling solution considering dual RTOS/GPOS systems. A real Linux-based infrastructure has been modeled an integrated into a state-of-the-art co-simulation environment. The resulting solution is capable of modeling and evaluating all HW and SW system components providing the designer with valuable information for early system optimization and design space exploration.
Keywords :
Linux; embedded systems; hardware-software codesign; operating system kernels; systems analysis; GPOS; HW peripherals; Linux-based RTOS platforms; SW code; annotated code; complex SW infrastructures; design process; design space exploration; embedded systems; functional execution; general purpose operating system; hard-RT SW domain; multiOS systems; native-based co-simulation; real-time operating systems; real-time tasks; simulation speed; system components; system functionality; system modeling; system optimization; system performance; system refinement; systemC time-approximate co-simulation environment; timing effects; Distributed computing; Embedded system; Linux; Operating systems; Power system reliability; Process design; Real time systems; Space exploration; System performance; Timing; Approximately-timed; Co-simulation; Real-time linux; TLM;
Conference_Titel :
Object/Component/Service-Oriented Real-Time Distributed Computing (ISORC), 2010 13th IEEE International Symposium on
Conference_Location :
Carmona, Seville
Print_ISBN :
978-1-4244-7083-9
Electronic_ISBN :
1555-0885
DOI :
10.1109/ISORC.2010.18