| 1. |
- Badawi, Mohammad, et al.
(författare)
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Customizable Coarse-grained Energy-efficient Reconfigurable Packet Processing Architecture
- 2014
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Ingår i: Proceedings Of The 2014 IEEE 25th International Conference on Application-specific Systems, Architectures and Processors (ASAP). - : IEEE. ; , s. 30-35
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Konferensbidrag (refereegranskat)abstract
- In this paper, we present a highly customizable and rapidly reconfigurable multi-core packet processing architecture that provides energy and area efficiency while retaining flexibility. Presented architecture with its agile reconfigurability permits time-critical adaptability where resources can be re-clustered at run time in few cycles, hence, maintaining efficiency if requirements of the use-case change. We elaborate the flexibility and adaptability of our architecture and we report its evaluation results. For evaluation, we performed the widely-used UDP/IP and we compared our proposed architecture to low-power 32-bit general purpose processors, a custom ASIC implementation and a programmable protocol processor. Compared to GPP-based solutions, our architecture is 20-34 times more energy efficient while providing 2.4-4.1 times higher throughput. While retaining the programmability, the proposed solution achieved 78% of the energy efficiency of hardwired ASIC implementation. Compared to a programmable protocol processor, our solution has 2.6 times more throughput and requires only a third of the gate count. lastly, we quantified the worst-case time and average-case time required for time-critical adaptability when reconfiguration occurs during a real-life Voice-Over IP traffic.
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| 2. |
- Badawi, Mohammad, et al.
(författare)
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Elastic Management and QoS Provisioning Scheme for Adaptable Multi-core Protocol Processing Architecture
- 2016
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Ingår i: 19TH EUROMICRO CONFERENCE ON DIGITAL SYSTEM DESIGN (DSD 2016). - : IEEE. - 9781509028160 ; , s. 575-583
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Konferensbidrag (refereegranskat)abstract
- Adaptable protocol processing architectures can offer quality-of-service (QoS) while improving energy efficiency and resource utilization. However, a key condition for adaptable architectures to support QoS is that, the latency required for processor adaptation does not result in violating packet processing delay bound. Moreover, adaptation latency must not cause packets to accumulate until memory becomes full and packets are dropped. In this paper, we present an elastic management scheme for agile adaptable multi-core protocol processing architecture to facilitate processor adaptation when QoS has to be maintained. The proposed management scheme encompasses a set of reconfigurable finite state machines (FSMs) and each is dimensioned to associate single processing element (PE). During processor adaptation, the needed FSMs can rapidly be clustered to provide the control needed for the newly adapted structure. We use a real-life application to demonstrate how our proposed management scheme supports maintaining QoS during processor adaptation. We also quantify the time needed for processor adaptation as well as the reduction in energy, latency and area achieved when using our scheme.
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| 3. |
- Badawi, Mohammad, et al.
(författare)
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Service-Guaranteed Multi-Port PacketMemory for Parallel Protocol Processing Architecture
- 2016
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Ingår i: Proceedings - 24th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing, PDP 2016. - : Institute of Electrical and Electronics Engineers (IEEE). - 9781467387750 ; , s. 408-412
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Konferensbidrag (refereegranskat)abstract
- Parallel processing architectures have been increasingly utilized due to their potential for improving performance and energy efficiency. Unfortunately, the anticipated improvement often suffers from a limitation caused by memory access latency and latency variation, which consequently impact Quality of Service (QoS). This paper presents a service-guaranteed multi-port packet memory system to boost parallelism in protocol processing architectures. In this proposed memory system, all arriving packets are guaranteed a memory space, such that, a packet memory space can be allocated in a bounded number of cycles and each of its locations is accessible in a single cycle. We consider a real-time Voice Over Internet Protocol (VOIP) call as a case-study to evaluate our service-guaranteed memory system.
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| 4. |
- Becker, Matthias, 1986-, et al.
(författare)
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An adaptive resource provisioning scheme for industrial SDN networks
- 2019
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Ingår i: IEEE International Conference on Industrial Informatics (INDIN). - : Institute of Electrical and Electronics Engineers Inc.. - 9781728129273 ; , s. 877-880
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Konferensbidrag (refereegranskat)abstract
- Many industrial domains face the challenge of ever growing networks, driven for example by Internet-of-Things and Industry 4.0. This typically comes together with increased network configuration and management efforts. In addition to the increasing network size, these domains typically are subject to adaptive load situations that pose an additional challenge on the network infrastructure.Software defined networking (SDN) is a promising networking paradigm that reduces configuration complexity and management effort in Ethernet networks. In this work, we investigate SDN in context of adaptive scenarios with QoS constraints. Our approach applies monitoring of several thresholds which automatically trigger redistribution of resources via the central SDN controller. This setup leads to an agile system that can dynamically react to load changes while the infrastructure is not overprovisioned. The approach is implemented in a low-level simulation environment where we demonstrate the benefits of the approach using a case study.
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| 5. |
- Becker, Matthias, 1986-, et al.
(författare)
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Towards QoS-Aware Service-Oriented Communication in E/E Automotive Architectures
- 2018
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Ingår i: Proceedings of the 44th Annual Conference of the IEEE Industrial Electronics Society (IECON). - : Institute of Electrical and Electronics Engineers (IEEE). ; , s. 4096-4101
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Konferensbidrag (refereegranskat)abstract
- With the raise of increasingly advanced driving assistance systems in modern cars, execution platforms that build on the principle of service-oriented architectures are being proposed. Alongside, service oriented communication is used to provide the required adaptive communication infrastructure on top of automotive Ethernet networks. A middleware is proposed that enables QoS aware service-oriented communication between software components, where the prescribed behavior of each software component is defined by Assume/Guarantee (A-G) contracts. To enable the use of COTS components, that are often not sufficiently verified for the use in automotive systems, the middleware monitors the communication behavior of components and verifies it against the components A/G contract. A violation of the allowed communication behavior then triggers adaption processes in the system while the impact on other communication is minimized. The applicability of the approach is demonstrated by a case study that utilizes a prototype implementation of the proposed approach.
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| 6. |
- Candaele, Bernard, et al.
(författare)
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Mapping Optimisation for Scalable multi-core ARchiTecture : The MOSART approach
- 2010
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Ingår i: Proceedings - IEEE Annual Symposium on VLSI, ISVLSI 2010. - 9780769540764 ; , s. 518-523
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Konferensbidrag (refereegranskat)abstract
- The project will address two main challenges of prevailing architectures: 1) The global Interconnect and memory bottleneck due to a single, globally shared memory with high access times and power consumption; 2) The difficulties in programming heterogeneous, multi-core platforms, in particular in dynamically managing data structures in distributed memory. MOSART aims to overcome these through a multi-core architecture with distributed memory organisation, a Network-on-Chip (NoC) communication backbone and configurable processing cores that are scaled, optimised and customised together to achieve diverse energy, performance, cost and size requirements of different classes of applications. MOSART achieves this by: A) Providing platform support for management of abstract data structures Including middleware services and a run-time data manager for NoC based communication infrastructure; 2) Developing tool support for parallelizing and mapping applications on the multi-core target platform and customizing the processing cores for the application.
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| 7. |
- Candaele, Bernard, et al.
(författare)
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The MOSART Mapping Optimization for multi-core Architectures
- 2011
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Ingår i: VLSI 2010 Annual Symposium. - Dordrecht : Springer Publishing Company. ; , s. 181-195
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Konferensbidrag (refereegranskat)abstract
- MOSART project addresses two main challenges of prevailing architectures: (i) Theglobal interconnect and memory bottleneck due to a single, globally shared memorywith high access times and power consumption; (ii) The difficulties in programmingheterogeneous, multi-core platforms MOSART aims to overcome these through amulti-core architecture with distributed memory organization, a Network-on-Chip(NoC) communication backbone and configurable processing cores that are scaled,optimized and customized together to achieve diverse energy, performance, cost andsize requirements of different classes of applications. MOSART achieves this by:(i) Providing platform support for management of abstract data structures includingmiddleware services and a run-time data manager for NoC based communicationinfrastructure; (ii) Developing tool support for parallelizing and mapping applicationson the multi-core target platform and customizing the processing cores for theapplication.
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| 8. |
- Chen, Dejiu, et al.
(författare)
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A methodological framework for model-based self-management of services and components in dependable cyber-physical systems
- 2017
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Ingår i: 12th International Conference on Dependability and Complex Systems, DepCoS-RELCOMEX 2017. - Cham : Springer. - 9783319594149 ; , s. 97-105
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Konferensbidrag (refereegranskat)abstract
- Modern automotive vehicles featuring ADAS (Advanced Driving Assistant Systems) and AD (Autonomous Driving) represent one category of dependable CPS (Cyber-Physical Systems). For such systems, the adaptation of generic purpose COTS (Commercial-Off-The-Shelf) services and components has been advocated in the industry as a necessary means for shortening the innovation loops and enabling efficient product evolution. This will however not be a trivial task due to the system safety- and time-criticality. This calls on one hand for formal specification of systems, and on the other hand for a systematic approach to module design, supervision and adaptions. Accordingly, we propose in this paper a novel method that emphasizes an integration of system models, formal contracts, and embedded services for effective self-management of COTS. The key modeling technologies include the EAST-ADL for formal system description and the A-G contract theory for module specification.
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| 9. |
- Chen, DeJiu, et al.
(författare)
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IMBSA 2017: Model-Based Safety and Assessment
- 2017
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Ingår i: Model-Based Safety and Assessment - 5th International Symposium, Trento, Italy, September 11–13, 2017. - Cham : Springer. - 9783319641188 ; , s. 227-240
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Konferensbidrag (refereegranskat)abstract
- Modern automotive vehicles represent one category of CPS (Cyber-Physical Systems) that are inherently time- and safety-critical. To justify the actions for quality-of-service adaptation and safety assurance, it is fundamental to perceive the uncertainties of system components in operation, which are caused by emergent properties, design or operation anomalies. From an industrial point of view, a further challenge is related to the usages of generic purpose COTS (Commercial-Off-The-Shelf) components, which are separately developed and evolved, often not sufficiently verified and validated for specific automotive contexts. While introducing additional uncertainties in regard to the overall system performance and safety, the adoption of COTS components constitutes a necessary means for effective product evolution and innovation. Accordingly, we propose in this paper a novel approach that aims to enable advanced operation monitoring and self-assessment in regard to operational uncertainties and thereby automated performance and safety awareness. The emphasis is on the integration of several modeling technologies, including the domain-specific modeling framework EAST-ADL, the A-G contract theory and Hidden Markov Model (HMM). In particular, we also present some initial concepts in regard to the usage performance and safety awareness for quality-of-service adaptation and dynamic risk mitigation.
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| 10. |
- Chen, Hui, et al.
(författare)
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A CORDIC-Based Architecture with Adjustable Precision and Flexible Scalability to Implement Sigmoid and Tanh Functions
- 2020
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Ingår i: IEEE International Symposium on Circuits and Systems, ISCAS 2020. - : IEEE.
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Konferensbidrag (refereegranskat)abstract
- In the artificial neural networks, tanh (hyperbolic tangent) and sigmoid functions are widely used as activation functions. Past methods to compute them may have shortcomings such as low precision or inflexible architecture that is difficult to expand, so we propose a CORDIC-based architecture to implement sigmoid and tanh functions, which has adjustable precision and flexible scalability. It just needs shift-add-or-subtract operations to compute high-accuracy results and is easy to expand the input range through scaling the negative iterations of CORDIC without changing the original architecture. We adopt the control variable method to explore the accuracy distribution through software simulation. A specific case (ARCH:(1, 15, 18), RMSE: 10(-6)) is designed and synthesized under the TSMC 40nm CMOS technology, the report shows that it has the area of 36512.78 mu m(2) and power of 12.35mW at the frequency of 1GHz. The maximum work frequency can reach 1.5GHz, which is better than the state-of-the-art methods.
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