Utilization-based schedulability analysis for switched Ethernet aiming dynamic QoS management

Marau, Ricardo; Almeida, Luís; Pedreiras, Paulo; Lakshmanan, Karthik; Rajkumar, R.

doi:10.1109/etfa.2010.5641360

Cited by 16 publications

(11 citation statements)

References 25 publications

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“…This factor should be taken into account when performing the response time analysis. This problem has been consid ered previously in [12] and the proposed solution was to inflate the transmission times of all messages by the per centage of the bandwidth resource availability, i. e. , the in flation factor is ex = (LSW -I)/ EC, where I is the idle time that is used to prevent scheduling window overrun and it is equal to the maximum packet size of messages that have priorities equal or grater than mi. All transmis sion times will be divided by ex, i. e. , OJ = Cj / ex and the response time of mi can be evaluated as follow: …”

Section: Response-time Calculationmentioning

confidence: 99%

Controlling multi-switch networks for prompt reconfiguration

Marau¹,

Behnam

Iqbal³

et al. 2012

2012 9th IEEE International Workshop on Factory Communication Systems

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Recent trends in distributed embedded systems, such as those found in avionics and trains, have shown an in crease in the amount and heterogeneity of the iriforma tion that needs to be exchanged, together with a growing importance of supporting dynamic reconfiguration and adaptive behaviors. In this paper we focus on Ethernet technologies with real-time reconfiguration support and we address the case of middle-size networking infrastruc tures with a few switches. We use the FTT-SE proto col with the needed adaptations to support dynamic het erogeneous real-time transactions in multi-hop networks. The paper presents a worst-case response-time analysis that provides timeliness guarantees, improving the results obtained with another previous analysis, decreasing the needed network capacity for guaranteed schedulability by 25% on average. Practical experiments and simulation results validate the proposed approach and analysis.

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Section: Response-time Calculationmentioning

confidence: 99%

Controlling multi-switch networks for prompt reconfiguration

Marau¹,

Behnam

Iqbal³

et al. 2012

2012 9th IEEE International Workshop on Factory Communication Systems

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“…Therefore, an inflation factor should be taken into account when performing the response time analysis. This issue has been considered previously in [24] and the proposed solution was to inflate the transmission time of the message by a percentage of the bandwidth availability.…”

Section: Algorithm 1 Response Time Calculation For M Imentioning

confidence: 99%

Reduced buffering solution for multi-hop HaRTES switched Ethernet networks

Ashjaei

Behnam

Pedreiras

et al. 2014

2014 IEEE 20th International Conference on Embedded and Real-Time Computing Systems and Applications

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In the context of switched Ethernet networks, multihop communication is essential as the networks in industrial applications comprise a high amount of nodes, that is far beyond the capability of a single switch. In this paper, we focus on multi-hop communication using HaRTES switches. The HaRTES switch is a modified Ethernet switch that provides real-time traffic scheduling, dynamic Quality-of-Service and temporal isolation between real-time and non-real-time traffic. Herein, we propose a method, called Reduced Buffering Scheme, to conduct the traffic through multiple HaRTES switches in a multi-hop HaRTES architecture. In order to enable the new scheduling method we propose to modify the HaRTES switch structure. Moreover, we develop a response time analysis for the new method. We also compare the proposed method with a method previously proposed, called Distributed Global Scheduling, based on their traffic response times. We show that, the new method forwards all types of traffic including the highest, the medium and the lowest priority, faster than the previous method in most of the cases. Furthermore, we show that the new method performs even better for larger networks compared with the previous one.

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“…For example, resource management and load balance can affect the performance of parallel software greatly [15] [16]. These attributes somewhere referred as QoS (Quality of Service) [9] [10], are orthogonal to the scientific functions of parallel components. We defined these attributes as non-functional attributes of parallel component.…”

Section: Extended Component Architecturementioning

confidence: 99%

“…But some attributes of parallel components orthogonal to the scientific function need to be paid more attention. These attributes are somewhere referred as QoS (Quality of Service) [9] [10]. Sometimes, they can affect the performance of parallel components.…”

Section: Introductionmentioning

confidence: 99%

Management of Non-functional Attributes of Parallel Components

Peng

Zhao

et al. 2011

Procedia Computer Science

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In this paper, we present an extension to the CCA component architecture. The extension defined a minimal set of non-functional attributes of parallel components. We have a implemented the common CCA components for the management of these attributes. Parallel components can provide some non-functional interfaces optionally. And they provide related information to the common components through these interfaces. For the optimization of parallel components implementations, the component developer should implement the attributes management parts specific to certain parallel components. The tests of the management of six of them show that our management mechanism can improves the performance of parallel components. And the test of management of the other three shows that this is an easy way of controlling parallel component execution. And it is very efficient. A real application test shows the practicability of our proposal.

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Utilization-based schedulability analysis for switched Ethernet aiming dynamic QoS management

Cited by 16 publications

References 25 publications

Controlling multi-switch networks for prompt reconfiguration

Controlling multi-switch networks for prompt reconfiguration

Reduced buffering solution for multi-hop HaRTES switched Ethernet networks

Management of Non-functional Attributes of Parallel Components

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