A flexible communications protocol for a distributed surveillance system
Journal of Network and Computer Applications
Alternatives for scheduling virtual machines in real-time embedded systems
Proceedings of the 1st workshop on Isolation and integration in embedded systems
A programming model for composing data-flow collaborative applications
ECBS'99 Proceedings of the 1999 IEEE conference on Engineering of computer-based systems
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This paper compares and evaluates the suitability of real-time operating systems, VxWorks and LynxOS, and general-purpose operating systems with real-time extensions, Windows NT, Solaris, and Linux, for real-time ORB middleware. While holding the hardware and ORB constant, we vary these operating systems and measure platform-specific variations in context switching overhead and priority inversions.Our findings illustrate that general-purpose operating systems like Windows NT, Solaris, and Linux are not yet suited to meet the demands of applications with stringent QoS requirements. Although Linux provides good raw performance, its high jitter makes it unsuitable for real-time applications. Both LynxOS and VxWorks do enable predictable and efficient ORB performance, however, thereby making them suitable as OS platforms for real-time CORBA applications. In general, our results underscore the need for a measure-driven methodology to pinpoint sources of overhead and priority inversion in real-time ORB endsystems.