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Design and Implementation of Multi-core Support for an Embedded Real-time Operating System for Space Applications
KTH, School of Information and Communication Technology (ICT).
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Nowadays, multi-core processors are widely used in embedded applications due to the advantages of higher performance and lower power consumption. However, the complexity of multi-core architectures makes it a considerably challenging task to extend a single-core version of a real-time operating system to support multi-core platform. This thesis documents the process of design and implementation of a multi-core version of RODOS - an embedded real-time operating system developed by German Aerospace Center and the University of W├╝rzburg - on a dual-core platform. Two possible models are proposed: Symmetric Multiprocessing and Asymmetric Multiprocessing. In order to prevent the collision of the global components initialization, a new multi-core boot loader is created to allow that each core boots up in a proper manner. A working version of multi-core RODOS is implemented that has an ability to run tasks on a multi-core platform. Several test cases are applied and verified that the performance on the multi-core version of RODOS achieves around 180% improved than the same tasks running on the original RODOS. Deadlock free communication and synchronization APIs are provided to let parallel applications share data and messages in a safe manner.

Place, publisher, year, edition, pages
TRITA-ICT-EX, 0215:37
Keyword [en]
real-time operating system, multi-core architecture, embedded system
URN: urn:nbn:se:kth:diva-174880OAI: diva2:859643
Available from: 2015-10-08 Created: 2015-10-08 Last updated: 2015-10-08Bibliographically approved

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