An overview of the Rialto real-time architecture

Jones, Michael; McCulley, Daniel L.; Forin, Alessandro; Leach, Paul J.; Rosu, Daniela; Roberts, Daniel L.

doi:10.1145/504450.504493

Cited by 61 publications

(16 citation statements)

References 1 publication

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“…They calculate real-time processs weight to meet the requirement of real-time application. [5], [8] show hierarchical scheduling to support the requirement of real-time for multimedia applications support.…”

Section: B Time-sensitive Application Support In General-purpose Osmentioning

confidence: 99%

PARFAIT: A new scheduler framework supporting heterogeneous Xen-ARM schedulers

Jeong

Yoo

2011

2011 IEEE Consumer Communications and Networking Conference (CCNC)

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In recent consumer electronics devices, virtualization is widely adopted for diverse reasons such as enhanced reliability, stronger security and better user customizability. Recent CE virtual machines require not only diverse functionalities of GPOS, but also real-time performance of RTOS. However, the current hypervisor-based virtual machine monitors cannot sufficiently support both RTOS and GPOS at the same time. The reason is that the current hypervisor scheduler is biased to only one kind of guest OS and it cannot support heterogeneous schedulers. Therefore, this paper proposes a new scheduler architecture, PARFAIT for both RT and GP guest OSs. Our new scheduler enables to guarantee CPU bandwidth for RTOS and provides fairness among GPOSs using hierarchical structure.

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Section: B Time-sensitive Application Support In General-purpose Osmentioning

confidence: 99%

PARFAIT: A new scheduler framework supporting heterogeneous Xen-ARM schedulers

Jeong

Yoo

2011

2011 IEEE Consumer Communications and Networking Conference (CCNC)

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“…Many different soft real-time processing models have been developed to support soft real-time scheduling in various environments [10,2,23,12,13,15,21,9,27,3,7]. In general, each of these models classifies all soft real-time applications into a single class by considering them to have similar timeliness features.…”

Section: Related Workmentioning

confidence: 99%

Diverse Soft Real-Time Processing in an Integrated System

Lin

Kaldewey

Povzner

et al. 2006

2006 27th IEEE International Real-Time Systems Symposium (RTSS'06)

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The simple notion of soft real-time processing has fractured into a spectrum of diverse soft real-time types with a variety of different resource and time constraints. Schedulers have been developed for each of these types, but these are essentially point solutions in the space of soft real-time and no detailed unified definition of soft real-time has previously been provided that includes all types of soft realtime processing. We present a complete real-time taxonomy covering the spectrum of processes from best-effort to hard real-time. The taxonomy divides processes into nine classes based on their resource and timeliness requirements and includes four soft real-time classes, each of which captures a group of soft real-time applications with similar characteristics. We exploit the different features of each of the soft real-time classes to integrate all of them into a single scheduler together with hard real-time and best-effort processes and present results demonstrating their performance.

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“…Our goals and approach are closely related to those of Rialto [13] [14]. A major goal of Rialto was to investigate programming abstractions that allow multiple, independent real-time applications to dynamically co-exist and share resources on a hardware platform.…”

Section: Soft Real-time Schedulingmentioning

confidence: 99%

“…These mechanisms provide a variety of interfaces for determining the amount of resources that will be allocated to an application, allowing a process to a) negotiate with the operating system for a specific amount of resources as in RT Mach [19] and Rialto [13] [14]; b) specify a range of resource allocations as in MMOSS [7]; or c) specify a measure of application importance that can be used to compute a fair resource allocation as in SMART [21] [22]. These systems all provide a mechanism that can be used to dynamically reduce the resource allotment granted to the running applications.…”

Section: Introductionmentioning

confidence: 99%

A dynamic quality of service middleware agent for mediating application resource usage

Brandt

Nutt²,

Berk³

et al.

Proceedings 19th IEEE Real-Time Systems Symposium (Cat. No.98CB36279)

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High-bandwidth applications with time-dependent resource requirements demand certain resource level assurances in order to operate correctly. Quality of Service resource management techniques are being successfully developed that allow network systems to provide such assurances. These solutions generally assume that the operating system at either end of the network is capable of handling the throughput requirements of the applications. However, real operating systems have to manage many concurrent applications with varying resource requirements. Without specialized support, the operating system cannot guarantee the resources needed for any particular application. In support of these kinds of applications we have developed a middleware agent called a dynamic QoS manager (DQM) that mediates application resource usage so as to ensure that applications get the resources they need in order to provide adequate performance. The DQM employs a variety of algorithms to determine application resource allocations. Using application QoS levels, it provides for resource availability based algorithmic variation within applications and varying application periods. It also allows for inaccurate application resource usage estimates through a technique we have developed called dynamic estimate refinement. This paper discusses new developments in the design of the DQM and presents results showing DQM performance with both real and synthetic applications.

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An overview of the Rialto real-time architecture

Abstract: The goal of the Rialto project at Microsoft Research is to build a system architecture supporting coexisting independent real-time (and non-real-time)

Cited by 61 publications

References 1 publication

PARFAIT: A new scheduler framework supporting heterogeneous Xen-ARM schedulers

PARFAIT: A new scheduler framework supporting heterogeneous Xen-ARM schedulers

Diverse Soft Real-Time Processing in an Integrated System

A dynamic quality of service middleware agent for mediating application resource usage

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