DocumentCode :
3443895
Title :
Predictability and Efficiency in Contemporary Hard RTOS for Multiprocessor Systems
Author :
Nogueira, Antonio ; Calha, Mario
Author_Institution :
Inf. Dept., Large-Scale Inf. Syst. Lab., Lisbon, Portugal
Volume :
2
fYear :
2011
fDate :
28-31 Aug. 2011
Firstpage :
3
Lastpage :
8
Abstract :
Hard real-time operating systems have been mostly designed for uniprocessors. Driven by the high computational demand of real-time systems, these operating systems have been re-designed for multiprocessors. Researchers have been identifying issues that affect the predictability of multiprocessor hard real-time systems. These sources of unpredictability make it difficult to accurately predict safe and tight worst-case execution time bounds of real-time tasks. As a result, the performance of multiprocessor hard real-time systems is compromised. In this paper, we present a middleware architecture that aims to provide predictability and high efficiency for multiprocessor hard real-time systems. The middleware supports hybrid hard real-time tasks, which are adaptive hard real-time services that intend to ensure predictability and performance. We also present a prototype of this architecture. Moreover, we identify and discuss issues that affect the predictability and performance of multiprocessor hard real-time systems.
Keywords :
middleware; multiprocessing systems; operating systems (computers); real-time systems; adaptive hard real-time services; contemporary hard RTOS; hard real-time operating systems; middleware architecture; multiprocessor hard real-time systems; multiprocessor systems; worst-case execution time bound; Computer architecture; Linux; Middleware; Payloads; Processor scheduling; Prototypes; Real time systems; hard real-time operating system; multiprocessor processor architecture; scheduling; wormhole model;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Embedded and Real-Time Computing Systems and Applications (RTCSA), 2011 IEEE 17th International Conference on
Conference_Location :
Toyama
ISSN :
1533-2306
Print_ISBN :
978-1-4577-1118-3
Type :
conf
DOI :
10.1109/RTCSA.2011.56
Filename :
6029901
Link To Document :
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