Access Restriction

Author Pellizzoni, Rodolfo ♦ Bui, Bach D. ♦ Caccamo, Marco ♦ Sha, Lui
Source CiteSeerX
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Cots-based Embedded System ♦ Real-time Task Constraint ♦ Cot Component ♦ Cotscompatible Device ♦ O-induced Task Delay ♦ Analytical Technique ♦ Peripheral Traffic ♦ Complete Framework ♦ Extensive Experiment ♦ Real-time Task ♦ Cots-based System ♦ Peripheral Gate ♦ Critical Real-time System ♦ Peripheral Access ♦ Cot Peripheral ♦ Cache Activity ♦ Safe Bound ♦ Main Component ♦ Pci Peripheral
Description Integrating COTS components in critical real-time systems is challenging. In particular, we show that the interference between cache activity and I/O traffic generated by COTS peripherals can unpredictably slow down a real-time task by up to 44%. To solve this issue, we propose a framework comprised of three main components: 1) a COTScompatible device, the peripheral gate, that controls peripheral access to the system; 2) an analytical technique that computes safe bounds on the I/O-induced task delay; 3) a coscheduling algorithm that maximizes the amount of allowed peripheral traffic while guaranteeing all real-time task constraints. We implemented the complete framework on a COTS-based system using PCI peripherals, and we performed extensive experiments to show its feasibility. 1.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Institution In Real-Time Systems Symposium, 2008