On kernel support for real-time multimedia applications
Jeffay, K.
Workstation Operating Systems, 1992. Proceedings., Third Workshop on
Volume , Issue , 23-24 Apr 1992 Page(s):39 - 46
Digital Object Identifier 10.1109/WWOS.1992.275691
Summary:Real-time operating system services are required to support
multimedia systems that rely heavily on the workstation processor for
control of the audio and video processors and movement of audio and
video data. The requirements for each service are described, together
with the YARTOS kernel, an operating system kernel that provides
real-time communication and computation services. The programming model
supported by YARTOS is an extension of Wirth's discipline of real-time
programming. In essence it is a message-passing system with a semantics
of interprocess communication that specifies the real-time response that
an operating system must provide to a message receiver. This allows a
programmer to assert an upper bound on the time to receipt and
processing of each message. The YARTOS kernel supports the notion of
guaranteed processing rates. The desired processing rate of each task is
made known to the kernel, and the kernel provides a guaranteed response
time to each task that is sufficient for ensuring that the required
processing rate is achieved
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