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Is Machine Learning Ready for Traffic Engineering Optimization? 29

Is Machine Learning Ready for Traffic Engineering Optimizati...

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29th ieee International conference on network Protocols (ICNP)

作者： Bernardez, Guillermo Suarez-Varela, Jose Lopez, Albert Wu, Bo Xiao, Shihan Cheng, Xiangle Barlet-Ros, Pere Cabellos-Aparicio, Albert Univ Politecn Cataluna Barcelona Neural Networking Ctr Barcelona Spain Huawei Technol Co Ltd Network Technol Lab Beijing Peoples R China

ISBN: (纸本)9781665441315

Traffic Engineering (TE) is a basic building block of the Internet. In this paper, we analyze whether modern Machine Learning (ML) methods are ready to be used for TE optimization. We address this open question through a comparative analysis between the state of the art in ML and the state of the art in TE. To this end, we first present a novel distributed system for TE that leverages the latest advancements in ML. Our system implements a novel architecture that combines Multi-Agent Reinforcement Learning (MARL) and Graph Neural networks (GNN) to minimize network congestion. In our evaluation, we compare our MARL+GNN system with DEFO, a network optimizer based on Constraint programming that represents the state of the art in TE. Our experimental results show that the proposed MARL+GNN solution achieves equivalent performance to DEFO in a wide variety of network scenarios including three real-world network topologies. At the same time, we show that MARL+GNN can achieve significant reductions in execution time (from the scale of minutes with DEFO to a few seconds with our solution).

关键词： Traffic Engineering Routing Optimization Multi-Agent Reinforcement Learning Graph Neural networks

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Constructing Temporal networks of OSS programming Language Ecosystems

Constructing Temporal Networks of OSS Programming Language E...

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ieee International conference on Software Analysis, Evolution and Reengineering (SANER)

作者： Alexander Agroskin Elena Lyulina Sergey Titov Vladimir Kovalenko Weizmann Institute of Science Israel JetBrains Research Serbia JetBrains Research Cyprus JetBrains Research The Netherlands

One of the primary factors that encourage developers to contribute to open source software (OSS) projects is the collaborative nature of OSS development. However, the collaborative structure of these communities largely remains unclear, partly due to the enormous scale of data to be gathered, processed, and *** this work, we utilize the World Of Code dataset, which contains commit activity data for millions of OSS projects, to build collaboration networks for ten popular programming language ecosystems, containing in total over 290M commits across over 18M projects. We build a collaboration graph representation for each language ecosystem, having authors and projects as nodes, which enables various forms of social network analysis on the scale of language ecosystems. Moreover, we capture the information on the ecosystems’ evolution by slicing each network into 30 historical snapshots. Additionally, we calculate multiple collaboration metrics that characterise the ecosystems’ *** make the resulting dataset publicly available 1 , including the constructed graphs and the pipeline enabling the analysis of more ecosystems.

关键词： Computer languages Codes Social networking (online) Ecosystems Pipelines Collaboration Reproducibility of results

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JACC: An openACC Runtime Framework with Kernel-Level and Multi-GPU Parallelization 28

JACC: An OpenACC Runtime Framework with Kernel-Level and Mul...

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28th Annual ieee International conference on High Performance Computing, Data, and Analytics (HiPC)

作者： Matsumura, Kazuaki de Gonzalo, Simon Garcia Pena, Antonio J. Barcelona Supercomp Ctr BSC Barcelona Spain

ISBN: (纸本)9781665410168

The rapid development in computing technology has paved the way for directive-based programming models towards a principal role in maintaining software portability of performance-critical applications. Efforts on such models involve a least engineering cost for enabling computational acceleration on multiple architectures while programmers are only required to add meta information upon sequential code. Optimizations for obtaining the best possible efficiency, however, are often challenging. The insertions of directives by the programmer can lead 10 side-effects that limit the available compiler optimization possible, which could result in performance degradation. This is exacerbated when targeting multi-GPU systems, as pragmas do not automatically adapt to such systems, and require expensive and lime consuming code adjustment by programmers. This paper introduces JACC, an openACC runtime framework which enables the dynamic extension of openACC programs by serving as a transparent layer between the program and the compiler. We add a versatile code-translation method for multi-device utilization by which manually-optimized applications can he distributed automatically while keeping original code structure and parallelism. We show in some cases nearly linear scaling on the part of kernel execution with the NVIDIA V100 GPUs. While adaptively using multi-GPUs, the resulting performance improvements amortize the latency of GPU-to-GPU communications.

关键词： Multi-GPUs Runtime System Code Generation Directive-Based programming

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Multi-programming-Language Commits in OSS: An Empirical Study on Apache Projects 29

Multi-Programming-Language Commits in OSS: An Empirical Stud...

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29th ieee/ACM International conference on Program Comprehension (ICPC) / 18th ieee/ACM International conference on Mining Software Repositories (MSR)

作者： Li, Zengyang Qi, Xiaoxiao Yu, Qinyi Liang, Peng Mo, Ran Yang, Chen Cent China Normal Univ Sch Comp Sci Wuhan Peoples R China Cent China Normal Univ Hubei Prov Key Lab Artificial Intelligence & Smar Wuhan Peoples R China Wuhan Univ Sch Comp Sci Wuhan Peoples R China IBO Technol Shenzhen Co Ltd Shenzhen Peoples R China

ISBN: (纸本)9781665414036

Modern software systems, such as Spark, are usually written in multiple programming languages (PLs). Besides benefiting from code reuse, such systems can also take advantages of specific PLs to implement certain features, to meet various quality needs, and to improve development efficiency. In this context, a change to such systems may need to modify source files written in different PLs. We define a multi-programming-language commit (MPLC) in a version control system (e.g., Git) as a commit that involves modified source files written in two or more PLs. To our knowledge, the phenomenon of MPLCs in software development has not been explored yet. In light of the potential impact of MPLCs on development difficulty and software quality, we performed an empirical study to understand the state of MPLCs, their change complexity, as well as their impact on open time of issues and bug proneness of source files in real-life software projects. By exploring the MPLCs in 20 non-trivial Apache projects with 205,994 commits, we obtained the following findings: (1) 9% of the commits from all the projects are MPLCs, and the proportion of MPLCs in 80% of the projects goes to a relatively stable level;(2) more than 90% of the MPLCs from all the projects involve source files written in two PLs;(3) the change complexity of MPLCs is significantly higher than that of non-MPLCs in all projects;(4) issues fixed in MPLCs take significantly longer to be resolved than issues fixed in non-MPLCs in 80% of the projects;and (5) source files that have been modified in MPLCs tend to be more bug-prone than source files that have never been modified in MPLCs. These findings provide practitioners with useful insights on the architecture design and quality management of software systems written in multiple PLs.

关键词： Multi-programming-Language Commit Change Complexity Defect Density open Source Software

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Deep Learning Model for Image-Based Plant Diseases Detection on Edge Devices 6

Deep Learning Model for Image-Based Plant Diseases Detection...

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6th International conference for Convergence in Technology (I2CT)

作者： Chaitra, S. Ghana, Satyajit Singh, Shikhar Poddar, Prachi MS Ramaiah Univ Appl Sci Dept Comp Sci & Engn Bangalore Karnataka India

ISBN: (纸本)9781728188768

Plant diseases are a major threat to global food security. Infection of plants by pathogens can have serious consequences on plant health which inherently affects human health. With more than 80 percent of agricultural production done by smallholder farmers who depend on healthy crop yield for their livelihood, yield loss of more than 50 percent due to pests and diseases is reported. Currently, infectious diseases reduce the potential yield by an average of 40% with many farmers in the developing world experiencing yield losses as high as 100%. The widespread distribution of smartphones among crop growers around the world with an expected 5 billion smartphones by 2020 offers the potential of turning the smartphone into a valuable tool for diverse communities growing food. One potential application is the development of mobile disease diagnostics through machine learning and crowdsourcing. With the help of state of art technologies like deep learning and cloud computing, the same can be achieved on a real-time basis. With the help of Convolutional Neural network architectures, a system is proposed that focuses on detection and identification of the plant disease with a mere click of leaf picture and provides solutions.

关键词： Convolutional Neural network architectures Deep Learning models Plant diseases and Python programming

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Proposal for a Teaching Solution for Mobile Telecommunications 4G/5G and Associated Services in Virtual and Digital Universities

Proposal for a Teaching Solution for Mobile Telecommunicatio...

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ieee World Engineering Education conference (EDUNINE)

作者： Erick Gauthier Gbetie Mamadou Ba Siré Eugène Zabolo Ibrahima Ngom Samuel Ouya Higher Polytechnic School – LITA University Cheikh Anta Diop of Dakar Dakar Senegal

ISBN: (数字)9798331542788

ISBN: (纸本)9798331542795

The transition to 5G, the development of virtualization and cloud solutions, and microservices approaches through containerization offer new opportunities for telecommunications education, particularly in regions like Senegal. This article proposes a microservices-based approach to implement VoLTE and VoNR services at the École Centrale de Logiciels Libres et de Télécommunications in Dakar. A testbed with a containerized 4G/5G core network, srsRAN base stations, and a Grafana monitoring system enables practical voice service testing with performance comparable to commercial networks. Resource challenges have been overcome through the use of open-source technologies, providing a sustainable and adaptable educational model for African contexts. This study contributes to improving telecommunications education in Senegal and serves as a roadmap for the adoption of 5G technologies by other African institutions. Future work will integrate IoT and critical communications into the educational framework.

关键词： Training 5G mobile communication Microservice architectures Computer architecture Video conferencing Telecommunications Proposals Virtualization Testing Software radio

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Optimizing Irregular Communication with Neighborhood Collectives and Locality-Aware Parallelism

Optimizing Irregular Communication with Neighborhood Collect...

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2023 International conference on High Performance Computing, network, Storage, and Analysis, SC Workshops 2023

作者： Collom, Gerald Li, Rui Peng Bienz, Amanda Department of Computer Science University of New Mexico Albuquerque United States Center for Advanced Scientific Computing Lawrence Livermore National Laboratory Livermore United States

ISBN: (纸本)9798400707858

Irregular communication often limits both the performance and scalability of parallel applications. Typically, applications individually implement irregular communication as point-to-point, and any optimizations are integrated directly into the application. As a result, these optimizations lack portability. It is difficult to optimize point-to-point messages within MPI, as the interface for single messages provides no information on the collection of all communication to be performed. However, the persistent neighbor collective API, released in the MPI 4 standard, provides an interface for portable optimizations of irregular communication within MPI libraries. This paper presents methods for implementing existing optimizations for irregular communication within neighborhood collectives, analyzes the impact of replacing point-to-point communication in existing codebases such as Hypre BoomerAMG with neighborhood collectives, and finally shows up to a 1.38x speedup on sparse matrix-vector multiplication communication within a BoomerAMG solve through the use of our optimized neighbor collectives. The authors analyze three implementations of persistent neighborhood collectives for Alltoallv: an unoptimized wrapper of standard point-to-point communication, and two locality-aware aggregating methods. The second locality-aware implementation exposes an non-standard interface to perform additional optimization, and the authors present the additional 0.07x speedup from the extended interface. All optimizations are available in an open-source codebase, MPI Advance, which sits on top of MPI, allowing for optimizations to be added into existing codebases regardless of the system MPI install. © 2023 ACM.

关键词： Application programming interfaces (API)

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RED-SEA: network Solution for Exascale architectures 25

RED-SEA: Network Solution for Exascale Architectures

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25th Euromicro conference on Digital System Design (DSD)

作者： Biagioni, Andrea Cretaro, Paolo Frezza, Ottorino Lo Cicero, Francesca Lonardo, Alessandro Martinelli, Michele Paolucci, Pier Stanislao Pastorelli, Elena Simula, Francesco Turisini, Matteo Vicini, Piero Ammendola, Roberto Bernier-Bruna, Pascale Chen, Claire Derradji, Said Guez, Stephane Lagadec, Pierre-Axel Pichon, Gregoire Walter, Etienne De Gassowski, Gaetan Hautreaux, Matthieu Mathieu, Stephane Moreau, Gilles Perache, Marc Taboada, Hugo Hoefler, Torsten Schneider, Timo Barnaba, Matteo Brandino, Giuseppe Piero De Giorgi, Francesco Poggi, Matteo Mavroidis, Iakovos Papaefstathiou, Yannis Tampouratzis, Nikolaos Kalisch, Benjamin Krackhardt, Ulrich Nuessle, Mondrian Xirouchakis, Pantelis Mageiropoulos, Vangelis Gianioudis, Michalis Loukas, Harisis Ioannou, Aggelos Kallimanis, Nikos Chrysos, Nikos Katevenis, Manolis Frings, Wolfang Gottwald, Dominik Guimaraes, Felime Holicki, Max Marx, Volker Muller, Yannik Clauss, Carsten Falter, Hugo Huang, Xu Barillao, Jennifer Lopez Moschny, Thomas Pickartz, Simon Alfaro, Francisco J. Escudero-Sahuquillo, Jesus Javier Garcia, Pedro Quiles, Francisco J. Sanchez, Jose L. Castello, Adrian Duro, Jose Engracia Gomez, Maria Quintana, Enrique Sahuquillo, Julio Stabile, Eugenio Ist Nazl Fis Nucl Sez Roma Infn Italy Ist Nazl Fis Nucl Sez Roma Tor Vergata Rome Italy Atos Bezons France CEA Paris France Swiss Fed Inst Technol Zurich Switzerland Exact Lab Trieste Italy Exapsys Thessaloniki Greece Extoll Mannheim Germany FORTH Iraklion Greece Julich Res Ctr Julich Germany ParTec Nurnberg Germany Univ Castilla La Mancha Ciudad Real Spain Univ Politecn Valencia Valencia Spain

ISBN: (纸本)9781665474047

In order to enable Exascale computing, next generation interconnection networks must scale to hundreds of thousands of nodes, and must provide features to also allow the HPC, HPDA, and AI applications to reach Exascale, while benefiting from new hardware and software trends. RED-SEA will pave the way to the next generation of European Exascale interconnects, including the next generation of BXI, as follows: (i) specify the new architecture using hardware-software co-design and a set of applications representative of the new terrain of converging HPC, HPDA, and AI;(ii) test, evaluate, and/or implement the new architectural features at multiple levels, according to the nature of each of them, ranging from mathematical analysis and modeling, to simulation, or to emulation or implementation on FPGA testbeds;(iii) enable seamless communication within and between resource clusters, and therefore development of a high-performance low latency gateway, bridging seamlessly with Ethernet;(iv) add efficient network resource management, thus improving congestion resiliency, virtualization, adaptive routing, collective operations;(v) open the interconnect to new kinds of applications and hardware, with enhancements for end-to-end network services - from programming models to reliability, security, low- latency, and new processors;(vi) leverage open standards and compatible APIs to develop innovative reusable libraries and Fabrics management solutions.

关键词： Interconnect HPC congestion mechanism datacenter collective communication Low-Latency Ethernet QoS

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Teaching Modeling, Simulation, and Performance Evaluation Course Online with Jupyter Notebook: Course Development and Lessons Learned

Teaching Modeling, Simulation, and Performance Evaluation Co...

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ieee Frontiers in Education conference (FIE)

作者： Sallabi, Farag M. Lazarova-Molnar, Sanja United Arab Emirates Univ Comp & Network Engn Dept Al Ain U Arab Emirates Univ Southern Denmark Maersk Mc Kinney Moller Inst Odense Denmark

ISBN: (数字)9781665462440

ISBN: (纸本)9781665462440

This innovative practice full paper presents a case of teaching modeling, simulation, and performance evaluation course online during the COVID-19 pandemic for graduate students. The course includes theoretical and practical sessions with varying complexity. Students should have a good background in math, statistics, and probability. Students must also have good experience in one of the computer programming languages to solve the homework and work on the term project. The challenge is how to teach these topics online and engage the students in the course as they learn in face-to-face classes. Delivering the course using PowerPoint slides and a whiteboard is not suitable for teaching the class online. Therefore, there must be an alternative way to deliver the course online. We noticed a growing interest in using Jupyter Notebook in teaching, which motivated us to apply it to the mentioned course with some innovations. Jupyter Notebook is an open-source web application that allows us to create and share documents that contain live code, equations, visualizations, and narrative text. We want to share our experience teaching this course online using Jupyter Notebook in this innovative practice. We will share the course development plan, delivery mode, lessons learned, and student feedback. I will also highlight maximizing the benefits of the Jupyter Notebook using add-ins and tools useful for teaching, such as converting the Jupyter Notebook to a slide show. Developing courses in Jupyter Notebook could be time-consuming and frustrating, especially if there are a lot of math equations, tables, and drawings. This effort pays off in terms of the quality of the instruction and learning, and it gives students a tool to help them practice and engage with the course material.

关键词： Jupyter Notebook online teaching simulation modeling course development

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Adaptive Dynamic programming-Based Fault Tolerant Control for Nonlinear Systems with Multiple Failures 4

Adaptive Dynamic Programming-Based Fault Tolerant Control fo...

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4th International conference on Industrial Artificial Intelligence, IAI 2022

作者： Zeng, Chujian Zhao, Bo Liu, Derong School of Automation Guangdong University of Technology Guangzhou510006 China School of Systems Science Beijing Normal University Beijing100875 China

ISBN: (数字)9781665451208

ISBN: (纸本)9781665451208

This paper investigates the fault tolerant control (FTC) scheme against multiple failures (i.e., both actuator and sensor failures occur simultaneously) for nonlinear systems via adaptive dynamic programming (ADP). A descriptor observer is designed to estimate the system states and failures concurrently. Next, a critic neural network (NN) is used to solve the Hamilton-Jacobi-Bellman (HJB) equation for the nominal system, i.e., the failure-free system, and the approximate optimal control policy is obtained. The FTC law is achieved by combining the estimated system states and failures with the approximate optimal control policy. By using the Lyapunov's direct method, we conclude that the closed-loop system is uniformly ultimately bounded. An example is employed to illustrate the effectiveness of the present FTC method. © 2022 ieee.

关键词： Nonlinear systems

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