2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC)最新文献

An Exploratory Study on Patterns in Dynamic Memory Allocations 动态内存分配模式的探索性研究

2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC) Pub Date : 2016-11-01 DOI: 10.1109/SBESC.2016.015

Alexandre Beletti Ferreira, Rivalino Matias, Vinicius Fonseca Maciel

引用次数: 1

A Hybrid Architecture for Experimentation in Wireless Sensor Networks 一种用于无线传感器网络实验的混合架构

2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC) Pub Date : 2016-11-01 DOI: 10.1109/SBESC.2016.025

Gilles Silvano, I. Silva, L. Oliveira, Marcos Pinheiro, Bruno Ferreira

引用次数: 0

Using Crowdsourcing Techniques and Mobile Devices for Asphaltic Pavement Quality Recognition 使用众包技术和移动设备进行沥青路面质量识别

2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC) Pub Date : 2016-11-01 DOI: 10.1109/SBESC.2016.029

L. C. Lima, V. J. Amorim, I. M. Pereira, Filipe Nunes Ribeiro, Ricardo A. O. Oliveira

{"title":"Using Crowdsourcing Techniques and Mobile Devices for Asphaltic Pavement Quality Recognition","authors":"L. C. Lima, V. J. Amorim, I. M. Pereira, Filipe Nunes Ribeiro, Ricardo A. O. Oliveira","doi":"10.1109/SBESC.2016.029","DOIUrl":"https://doi.org/10.1109/SBESC.2016.029","url":null,"abstract":"Currently, many developing countries based their transportation infrastructure on roads. These roads qualities have a significant influence on how fast products are delivered and how much it costs. Due to the lack of low-cost solutions or negligence, roadways pavement quality inspections are usually set aside or hardly performed at some places. This fact leads to higher casualties rates, driving discomfort, vehicle damage, and money prejudice. A cheap and accurate way to solve this problem is the use of typical smartphones with accelerometers and GPS sensors to measure the impact inflicted on the car when driving over a poor quality road surface. This scrutiny helps to raise data that can be used by road maintenance staff. Most current systems tend to translate its output to an international standard called IRI (International Roughness Index) but, this practice demands high computer processing. Here is presented \"RoadScan\", a crowdsourcing Android application that determines pavements quality in a simple and lightweight way. Our approach allows the mobile device to be placed at any position in the car. Considered tests and results are promising, identifying in most cases road regions that have some deformity.","PeriodicalId":336703,"journal":{"name":"2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124572263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

Predicting Thread Profiles across Core Types via Machine Learning on Heterogeneous Multiprocessors 在异构多处理器上通过机器学习预测跨核心类型的线程配置文件

2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC) Pub Date : 2016-11-01 DOI: 10.1109/SBESC.2016.017

Cha V. Li, V. Petrucci, D. Mossé

{"title":"Predicting Thread Profiles across Core Types via Machine Learning on Heterogeneous Multiprocessors","authors":"Cha V. Li, V. Petrucci, D. Mossé","doi":"10.1109/SBESC.2016.017","DOIUrl":"https://doi.org/10.1109/SBESC.2016.017","url":null,"abstract":"Given that energy consumption has become one of the most important issues in computer systems, Heterogeneous Multiprocessors (HMPs) have been introduced, where large high performing and small power-efficient cores can co-exist on the same platform and share the processing of the workload. Clearly, the concept is the same whether it is multiple processors on a board or a chip multiprocessor with several cores on a chip. With the advent of HMPs, thread scheduling becomes much more challenging, while having to deal with thread to processor-type mapping. In particular, it is important that the operating system is able to understand the workload behavior when a thread is to be migrated to a core of a different type. In this paper, we describe a thread characterization method that explores machine learning techniques to automate and improve the accuracy of predicting thread execution across different processor types. We use hardware performance counters and use machine learning to predict performance when moving a thread to another core type on heterogeneous processors. We show that our characterization scheme achieves higher structural similarity (SSIM) values when predicting performance indicators, such as instructions per cycle and last-level cache misses, commonly used to determine the mapping of threads to processor types at runtime. We also show that support vector regression achieves higher SSIM values when compared to linear regression, and has very low (1%) overhead.","PeriodicalId":336703,"journal":{"name":"2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126474624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

The Potential of Accelerating Image-Processing Applications by Using Approximate Function Reuse 利用近似函数重用加速图像处理应用的潜力

2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC) Pub Date : 2016-11-01 DOI: 10.1109/SBESC.2016.026

L. D. Silveira, M. Brandalero, J. D. Souza, A. C. S. Beck

{"title":"The Potential of Accelerating Image-Processing Applications by Using Approximate Function Reuse","authors":"L. D. Silveira, M. Brandalero, J. D. Souza, A. C. S. Beck","doi":"10.1109/SBESC.2016.026","DOIUrl":"https://doi.org/10.1109/SBESC.2016.026","url":null,"abstract":"Function reuse is a promising approach to accelerate single-threaded applications and exceed the limits of instruction-level parallelism. This approach exploits the observation that certain functions are executed several times with the same inputs, producing the same output. Therefore, by saving its results once in a reuse table, it is possible to skip subsequent calls when the same set of inputs is found. However, the table tends to get very large, and functions with multiple input arguments make the fetching process extremely costly because all input values must be compared to the saved ones. In this work, we combine function reuse with approximation, exploiting the characteristic that some applications are naturally error-tolerant, to quickly access the table using a single key and reduce its size. By using two image-processing benchmarks from the AxBench suite, we show that traditional function reuse achieves a reuse rate close to 0% due to the diversity of inputs. However, by applying approximation, it is possible to trade quality for reuse rate and achieve almost 50% reuse rate with less than 6% quality degradation.","PeriodicalId":336703,"journal":{"name":"2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128347679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

JustModeling: An MDE Approach to Develop Android Business Applications JustModeling:开发Android商业应用程序的MDE方法

2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC) Pub Date : 2016-11-01 DOI: 10.1109/SBESC.2016.016

Fabiano Freitas, P. Maia

引用次数: 14

Latency Analysis in Real LTE Networks for Vehicular Applications 车载实际LTE网络的时延分析

2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC) Pub Date : 2016-11-01 DOI: 10.1109/SBESC.2016.031

H. G. V. Andrade, C. Ferreira, A. Filho

引用次数: 6

Virtualizing Mixed-Criticality Operating Systems 虚拟化混合临界操作系统

2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC) Pub Date : 2016-11-01 DOI: 10.1109/SBESC.2016.020

R. Meurer, Mateus Krepsky Ludwich, A. A. Fröhlich

{"title":"Virtualizing Mixed-Criticality Operating Systems","authors":"R. Meurer, Mateus Krepsky Ludwich, A. A. Fröhlich","doi":"10.1109/SBESC.2016.020","DOIUrl":"https://doi.org/10.1109/SBESC.2016.020","url":null,"abstract":"The forever growing number of embedded control units in some applications such as cars or airplanes are increasing system complexity and making harder to coordinate all this hardware. The increasing capacity of embedded hardware and the advances in virtualization technology make it possible to deal with this problem. There is a current trend to bring many of this control systems to a single platform, thus making it possible for a single hardware platform to manage a whole system with the same isolation guarantees that the use of multiple Microcontroller Units (MCUs) provides, which also implies in a reduction of cost. However, all these different applications have very different purposes and requirements, so the platform should be able to handle all of them, from human interaction to hard real-time control. In our paper, we explore Linux paravirtualization interface, paravirt_ops, to make it run on a confined Virtual Machine (VM) on top of the HyperEPOS real-time hypervisor. The virtualized Linux provides embedded systems with all the functionalities of a general purpose operating system, including human interaction and connectivity, while other VMs define a realm for the proper operation of safe-critical tasks.","PeriodicalId":336703,"journal":{"name":"2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122651735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Constraint-Driven Assessment of Operating Systems for Wearable Devices 可穿戴设备操作系统的约束驱动评估

2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC) Pub Date : 2016-11-01 DOI: 10.1109/SBESC.2016.030

V. J. Amorim, S. Delabrida, Ricardo A. O. Oliveira

引用次数: 10

How Programming Languages and Paradigms Affect Performance and Energy in Multithreaded Applications 编程语言和范式如何影响多线程应用程序的性能和能量

2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC) Pub Date : 2016-11-01 DOI: 10.1109/SBESC.2016.019

Guilherme Magalhaes, A. L. Sartor, A. Lorenzon, P. Navaux, A. C. S. Beck

{"title":"How Programming Languages and Paradigms Affect Performance and Energy in Multithreaded Applications","authors":"Guilherme Magalhaes, A. L. Sartor, A. Lorenzon, P. Navaux, A. C. S. Beck","doi":"10.1109/SBESC.2016.019","DOIUrl":"https://doi.org/10.1109/SBESC.2016.019","url":null,"abstract":"Considering that multithreaded applications may be implemented using several programming languages and paradigms, in this work we show how they influence performance, energy consumption and energy-delay product (EDP). For that, we evaluate a subset of the NAS Parallel Benchmark, implemented in both procedural (C) and object-oriented programming languages (C++ and Java). We also investigate the overhead of Virtual Machines (VM) and the improvement that the Just-In-Time (JIT) compiler may provide. We show that the procedural language has better scalability than object-oriented ones, i.e., the improvements in performance, EDP, and energy savings are better in C than in C++ and Java as the number of threads increases; and that C can be up to 76 times faster than Java, even with the JIT mechanism enabled. We also demonstrate that the Java JIT effectiveness may vary according to the benchmark (1.16 and 23.97 times in performance and 1.19 to 19.85 times in energy consumption compared to the VM without JIT); and when it reaches good optimization levels, it can be up to 23% faster, consuming 42% less energy, and having an EDP 58% lower than C++.","PeriodicalId":336703,"journal":{"name":"2016 VI Brazilian Symposium on Computing Systems Engineering (SBESC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125917549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8