From CHAOS/sup base/ to CHAOS/sup arc/: a family of real-time kernels

Schwan, Karsten; Gheith, Ahmed; Zhou, Hongyi

doi:10.1109/real.1990.128732

Cited by 13 publications

(8 citation statements)

References 8 publications

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Section: Real-time Operating Systemsmentioning

confidence: 99%

“…This package has been implemented on standard Unix platforms (on SUN OS TM) and on a 32-node BBN Butterfly multiprocessor, and it has been used as a portable basis for the construction of parallel real-time applications and multiprocessor operating system kernels, such as the CHAOS arc system described in several recent publications [6,12,15].…”

Section: Real-time Operating Systemsmentioning

confidence: 99%

“…Unfortunately, portability is difficult to attain due to common requirements of predictability and high efficiency for real-time kernels and application programs [14]. As a result, implementors are often forced to repeat the implementation of lowlevel operating [14,16,15] or runtime system (e.g., for Ada runtime system implementations) functionality for each target machine.In this paper, we address the issue of operating system portability for parallel real-time applications by development of a real-time threads package based on Mach cthreads [5,11]. This package has been implemented on standard Unix platforms (on SUN OS TM) and on a 32-node BBN Butterfly multiprocessor, and it has been used as a portable basis for the construction of parallel real-time applications and multiprocessor operating system kernels, such as the CHAOS arc system described in several recent publications [6,12,15].…”

mentioning

confidence: 99%

“…As a result, implementors are often forced to repeat the implementation of lowlevel operating [14,16,15] or runtime system (e.g., for Ada runtime system implementations) functionality for each target machine.…”

mentioning

confidence: 99%

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Multiprocessor real-time threads

Schwan¹,

Zhou²

1992

SIGOPS Oper. Syst. Rev.

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Portability is an important attribute of real-time operating systems because their target hardware environments routinely vary from special purpose processors to parallel machines to distributed execution environments. In this paper, we address the issue of operating systems portability by development of a real-time threads package based on the Mach cthreads interface.Real-time threads have been implemented on standard Unix platforms and on a 32-node BBN Butterfly multiprocessor. In contrast to cthreads, the schedulability of real-time threads may be determined dynamically at the time of threads creation. In addition, any scheduling guarantees made at thread creation time are maintained when threads communicate or cooperate using the package's other primitives. Real-Time Operating SystemsPortability is an important attribute of real-time operating systems[4] because their target hardware routinely varies from special purpose processors to parallel machines[10] to distributed execution environments [18]. Unfortunately, portability is difficult to attain due to common requirements of predictability and high efficiency for real-time kernels and application programs [14]. As a result, implementors are often forced to repeat the implementation of lowlevel operating [14,16,15] or runtime system (e.g., for Ada runtime system implementations) functionality for each target machine.In this paper, we address the issue of operating system portability for parallel real-time applications by development of a real-time threads package based on Mach cthreads [5,11]. This package has been implemented on standard Unix platforms (on SUN OS TM) and on a 32-node BBN Butterfly multiprocessor, and it has been used as a portable basis for the construction of parallel real-time applications and multiprocessor operating system kernels, such as the CHAOS arc system described in several recent publications [6,12,15].The essential idea underlying real-time threads is that the schedulability of a thread should be 54

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Section: Real-time Operating Systemsmentioning

confidence: 99%

Section: Real-time Operating Systemsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Multiprocessor real-time threads

Schwan¹,

Zhou²

1992

SIGOPS Oper. Syst. Rev.

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“…As with other global abstractions in parallel programs (e.g., global sums, etc. [26]), certain dynamic program characteristics (e.g., the natural orderings between queue elements due to their times of insertion into the queue) can be exploited in order to reduce the costs of executing certain policies associated with those abstractions (e.g., the amount of work performed or the actual communication topology used to maintain some acceptable global ordering in a queue).…”

Section: Configuring Ktk Programsmentioning

confidence: 99%

KTK: kernel support for configurable objects and invocations

Gheith

Mukherjee

Silva

et al.

Proceedings of 2nd International Workshop on Configurable Distributed Systems

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The Kernel Tool Kit ( K T K ) is an object-based operating system kernel and parallel programming library that offers explicit support f o r on-and off-line program configuration. Specifically, K T K allows the specification of attributes f o r object classes, object instances, state variables, operations and object invocations. Attributes are interpreted by policy classes that m a y be varied separately f r o m the abstractions with which they are associated. They can be used to vary object internal implementation and semantics without affecting the methods being invoked. In this paper, the runtime configuration of K T K attributes is shown to improve the runtime performance of multiprocessor applications. K T K is layered on a portable and configurable parallel programming substrate, a Mach Cthreads compatible runtime library[22]. ConclusionsKTK and configurable threads provide an efficient basis for building configurable operating system kernels and application programs for multiprocessor systems. The performance advantages demonstrated 4 A configuration action is based on lock state that is 'too old' due to the relatively slow and asynchronous communication between applications threads and the local monitor thread.

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Real-Time Operating Systems

Stankovic

1994

Real Time Computing

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From CHAOS/sup base/ to CHAOS/sup arc/: a family of real-time kernels

Cited by 13 publications

References 8 publications

Multiprocessor real-time threads

Multiprocessor real-time threads

KTK: kernel support for configurable objects and invocations

Real-Time Operating Systems

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