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Real-time operating system services ...

Zuberi, Khawar Mahmood.

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Real-time operating system services for networked embedded systems.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Real-time operating system services for networked embedded systems./
Author:	Zuberi, Khawar Mahmood.
Description:	140 p.
Notes:	Source: Dissertation Abstracts International, Volume: 59-07, Section: B, page: 3563.
Contained By:	Dissertation Abstracts International59-07B.
Subject:	Computer science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9840680
ISBN:	9780591945270

Real-time operating system services for networked embedded systems.
Zuberi, Khawar Mahmood.

Real-time operating system services for networked embedded systems. - 140 p.

Source: Dissertation Abstracts International, Volume: 59-07, Section: B, page: 3563.

Thesis (Ph.D.)--University of Michigan, 1998.

This item must not be sold to any third party vendors.

This dissertation examines issues related to the design and implementation of real-time operating system (RTOS) services for consumer item embedded systems such as cars, webTVs, and cellular phones. Since these devices are mass-produced, keeping production costs low is all important, meaning that RTOS services must be highly efficient to enable use of low-cost hardware in these devices. This dissertation explores optimization techniques for basic RTOS services (task scheduling, synchronization, and communication) to meet the requirements of embedded systems.

ISBN: 9780591945270Subjects--Topical Terms:

523869
Computer science.

Real-time operating system services for networked embedded systems.
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100 1 $a Zuberi, Khawar Mahmood. $3 3174145
245 1 0 $a Real-time operating system services for networked embedded systems.
300 $a 140 p.
500 $a Source: Dissertation Abstracts International, Volume: 59-07, Section: B, page: 3563.
500 $a Chair: Kang G. Shin.
502 $a Thesis (Ph.D.)--University of Michigan, 1998.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a This dissertation examines issues related to the design and implementation of real-time operating system (RTOS) services for consumer item embedded systems such as cars, webTVs, and cellular phones. Since these devices are mass-produced, keeping production costs low is all important, meaning that RTOS services must be highly efficient to enable use of low-cost hardware in these devices. This dissertation explores optimization techniques for basic RTOS services (task scheduling, synchronization, and communication) to meet the requirements of embedded systems.
520 $a First, dynamic schedulers like earliest-deadline first (EDF) give high processor utilization but incur high run-time overhead while the opposite is true for static schedulers like rate-monotonic (RM). We design the combined static/dynamic (CSD) scheduler which employs both EDF and RM to deliver run-time overhead comparable to RM and utilization comparable to EDF.
520 $a Second, increasing use of OO programming has made efficient synchronization important for embedded systems. In an OO multitasking environment, accesses to objects have to be protected through semaphores to ensure mutual exclusion. We present a new semaphore implementation scheme which saves one context switch per lock operation in most circumstances by rescheduling threads to minimize blocking.
520 $a Third, embedded devices with Internet connectivity require efficient processing of network data. We present a protocol architecture for reducing receive overhead for audio and video messages. The architecture reduces I-cache misses by safely bypassing multiple protocol layers (benefiting short audio messages) and real-time message data is copied only once without any hardware support (benefiting long video messages).
520 $a Finally, embedded systems incoporating local area networks (LANs) require proper LAN message scheduling. Controller Area Network (CAN) is a popular LAN in automotive applications. Pure EDF scheduling is not feasible for CAN because of unacceptable overhead while deadline-monotonic (DM) scheduling is feasible but yields low network utilization. We present the feasible mixed traffic scheduler (MTS) which combines EDF and DM using quantized deadlines to deliver higher utilization than DM.
520 $a Using these optimizations, we built and evaluated an RTOS that provides a rich set of services to programmers and meets the efficiency/cost requirements of embedded systems.
590 $a School code: 0127.
650 4 $a Computer science. $3 523869
650 4 $a Systems science. $3 3168411
650 4 $a Automotive engineering. $3 2181195
690 $a 0984
690 $a 0790
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710 2 $a University of Michigan. $3 777416
773 0 $t Dissertation Abstracts International $g 59-07B.
790 $a 0127
791 $a Ph.D.
792 $a 1998
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9840680