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Achieving performance isolation with lightweight co-kernels 15

Achieving performance isolation with lightweight co-kernels

引用

24th ACM symposium on high-performance Parallel and Distributed computing, HPDC 2015

作者： Ouyang, Jiannan Kocoloski, Brian Lange, John Pedretti, Kevin Department of Computer Science University of Pittsburgh United States Center for Computing Research Sandia National Laboratories United States

ISBN: (纸本)9781450335508

performance isolation is emerging as a requirement for high performance computing (HPC) applications, particularly as HPC architectures turn to in situ data processing and application composition techniques to increase system throughput. these approaches require the co-location of disparate workloads on the same compute node, each with different resource and runtime requirements. In this paper we claim that these workloads cannot be effectively managed by a single Operating System/Runtime (OS/R). therefore, we present Pisces, a system software architecture that enables the co-existence of multiple independent and fully isolated OS/Rs, or enclaves, that can be customized to address the disparate requirements of next generation HPC workloads. Each enclave consists of a specialized lightweight OS cokernel and runtime, which is capable of independently managing partitions of dynamically assigned hardware resources. Contrary to other co-kernel approaches, in this work we consider performance isolation to be a primary requirement and present a novel co-kernel architecture to achieve this goal. We further present a set of design requirements necessary to ensure performance isolation, including: (1) elimination of cross OS dependencies, (2) internalized management of I/O, (3) limiting cross enclave communication to explicit shared memory channels, and (4) using virtualization techniques to provide missing OS features. the implementation of the Pisces co-kernel architecture is based on the Kitten Lightweight Kernel and Palacios Virtual Machine Monitor, two system software architectures designed specifically for HPC systems. Finally we will show that lightweight isolated co-kernels can provide better performance for HPC applications, and that isolated virtual machines are even capable of outperforming native environments in the presence of competing workloads. © 2015 ACM.

关键词： Virtual machine

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Centiman: Elastic, high performance Optimistic Concurrency Control by Watermarking 6

Centiman: Elastic, High Performance Optimistic Concurrency C...

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Conference on 6th ACM symposium on Cloud computing (SoCC 2015)

作者： Ding, Bailu Kot, Lucja Demers, Alan Gehrke, Johannes Cornell Univ Ithaca NY 14853 USA Cornell Univ Microsoft Corp Ithaca NY 14853 USA

ISBN: (纸本)9781450336512

We present Centiman, a system for high performance, elastic transaction processing in the cloud. Centiman provides serializability on top of a key-value store with a lightweight protocol based on optimistic concurrency control (OCC). Centiman is designed for the cloud setting, with an architecture that is loosely coupled and avoids synchronization wherever possible. Centiman supports sharded transaction validation;validators can be added or removed on-the-fly in an elastic manner. Processors and validators scale independently of each other and recover from failure transparently to each other. Centiman's loosely coupled design creates some challenges: it can cause spurious aborts and it makes it difficult to implement common performance optimizations for read-only transactions. To deal with these issues, Centiman uses a watermark abstraction to asynchronously propagate information about transaction commits through the system. In an extensive evaluation we show that Centiman provides fast elastic scaling, low-overhead serializability for read-heavy workloads, and scales to millions of operations per second.

关键词： optimistic concurrency control elastic transaction processing sharded validation

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Multi-view wireless video streaming based on compressed sensing: architecture and network optimization 15

Multi-view wireless video streaming based on compressed sens...

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16th ACM International symposium on Mobile Ad Hoc Networking and computing, MobiHoc 2015

作者： Cen, Nan Guan, Zhangyu Melodia, Tommaso Department of Electrical and Computer Engineering Northeastern University BostonMA02115 United States Department of Electrical Engineering State University of New York at Buffalo BuffaloNY14226 United States

ISBN: (纸本)9781450334891

Multi-view wireless video streaming has the potential to enable a new generation of efficient and low-power pervasive surveillance systems that can capture scenes of interest from multiple perspectives, at higher resolution, and with lower energy consumption. However, state-of-the-art multi-view coding architectures require relatively complex predictive encoders, thus resulting in high processing complexity and power requirements. To address these challenges, we consider a wireless video surveillance scenario and propose a new encoding and decoding architecture for multi-view video systems based on Compressed Sensing (CS) principles, composed of cooperative sparsity-aware block-level rate-adaptive encoders, feedback channels and independent decoders. the proposed architecture leverages the properties of CS to overcome many limitations of traditional encoding techniques, specifically massive storage requirements and high computational complexity. It also uses estimates of image sparsity to perform efficient rate adaptation and effectively exploit inter-view correlation at the encoder side. Based on the proposed encoding/decoding architecture, we further develop a CS-based end-to-end rate distortion model by considering the effect of packet losses on the perceived video quality. We then introduce a modeling framework to design network optimization problems in a multi-hop wireless sensor network. Extensive performance evaluation results show that the proposed coding framework and power-minimizing delivery scheme are able to transmit multi-view streams with guaranteed video quality at low power consumption. Copyright © 2015 ACM.

关键词： Video streaming

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proceedings - 2015 IEEE 12th International symposium on Autonomous Decentralized Systems, ISADS 2015

Proceedings - 2015 IEEE 12th International Symposium on Auto...

引用

2015 12th IEEE International symposium on Autonomous Decentralized Systems, ISADS 2015

ISBN: (纸本)9781479982615

the proceedings contain 46 papers. the topics discussed include: semantic based highly accurate autonomous decentralized URL classification system for web filtering;workload estimation for improving resource management decisions in the cloud;enhancing the performance of tree algorithm using re-split mechanism;autonomous decentralized combinatorial testing;web-based performance monitor for distributed computing;high reliability cloning technology for autonomous decentralized service-oriented architecture;physiological-signal-based key negotiation protocols for body sensor networks: a survey;trust-based task assignment in autonomous service-oriented ad hoc networks;and autonomous push-pull coordination technology to achieve reconciling resource utilization in heterogeneous communities environment.

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proceedings - 2015 IEEE 29th International Parallel and Distributed Processing symposium Workshops, IPDPSW 2015

Proceedings - 2015 IEEE 29th International Parallel and Dist...

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29th IEEE International Parallel and Distributed Processing symposium Workshops, IPDPSW 2015

ISBN: (纸本)0769555101

the proceedings contain 143 papers. the topics discussed include: bridging the gap between performance and bounds of Cholesky factorization on heterogeneous platforms;efficient message logging to support process replicas in a volunteer computing environment;early multi-node performance evaluation of a knights corner (KNC) Based NASA supercomputer;mini-NOVA: a lightweight ARM-based virtualization microkernel supporting dynamic partial reconfiguration;real-time multiprocessor architecture for sharing stream processing accelerators;relocation-aware floorplanning for partially-reconfigurable FPGA-based systems;experiences with compiler support for processors with exposed pipelines;performance modeling of matrix multiplication on 3d memory integrated FPGA;enhancing speedups for FPGA accelerated SPICE through frequency scaling and precision reduction;and an automated high-level design framework for partially reconfigurable FPGAs.

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Mitigating rate attacks through crypto-coded modulation 15

Mitigating rate attacks through crypto-coded modulation

引用

16th ACM International symposium on Mobile Ad Hoc Networking and computing, MobiHoc 2015

作者： Vo-Huu, Triet D. Noubir, Guevara College of Computer and Information Science Northeastern University BostonMA02115 United States

ISBN: (纸本)9781450334891

Exposing the rate information of wireless transmissions enables highly efficient attacks that can severely degrade the performance of a network at very low cost. In this paper, we introduce an integrated solution to conceal the rate information of wireless transmissions while simultaneously boosting the resiliency against interference. the proposed solution is based on a generalization of Trellis Coded Modulation combined with Cryptographic Interleaving. We develop algorithms for discovering explicit codes for concealing any modulation in BPSK, QPSK, 8-PSK, 16-QAM, 64-QAM. We propose a 2-pass frequency correction and phase tracking mechanisms that enables the proposed schemes to reach their potential. We demonstrate that in most cases this rate hiding scheme has the side effect of boosting resiliency by up to 7dB (simulations) and 4dB (SDR experiments). Copyright © 2015 ACM.

关键词： Modulation

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On the capacity requirement of largest-deficit-first for scheduling real-time traffic in wireless networks 15

On the capacity requirement of largest-deficit-first for sch...

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16th ACM International symposium on Mobile Ad Hoc Networking and computing, MobiHoc 2015

作者： Kang, Xiaohan Hou, I-Hong Ying, Lei School of Electrical Computer and Energy Engineering Arizona State University TempeAZ85287 United States CESG Department of ECE Texas A and M University College StationTX77843 United States

ISBN: (纸本)9781450334891

We consider ad hoc wireless networks with real-time traffic, and study the capacity requirement of a low-complexity scheduling policy, called largest-deficit-first (LDF), for achieving the same quality of service (QoS) as the optimal policy in networks with unit capacity. We derive theoretical upper and lower bounds for general traffic. the bounds depend on the interference degree of the network and the max/min delay bound ratio. the performance of LDF is further evaluated using simulations and compared with two other algorithms. the simulation results show that LDF significantly outperforms the other two algorithms. Copyright is held by the author/owner(s).

关键词： Quality of service

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Poster: Compressed sensing inspired approaches for path reconstruction in wireless sensor networks 15

Poster: Compressed sensing inspired approaches for path reco...

引用

16th ACM International symposium on Mobile Ad Hoc Networking and computing, MobiHoc 2015

作者： Liu, Rui Liang, Yao Zhong, Xiaoyang Department of Computer and Information Science Indiana University Purdue University IndianapolisIN United States

ISBN: (纸本)9781450334891

In this work, we investigate routing dynamics in mobile ad hoc wireless sensor networks (WSNs), which is of great importance for network performance analysis, operation optimization, system maintenance, and network diagnosis. We study packet path recovery for data collection in multi-hop dynamic WSNs at the sink based on compressed sensing approach. We extend our previous outing topology recovery (RTR) approach and evaluate its performance in comparison with the recent CSPR. Our work provides insights into the understanding of the profound impacts of different compressed sensing inspired approaches on their respective path reconstruction performance, and the resource requirement on sensor nodes. the evaluation results show that RTR can significantly outperform CSPR in various WSN setups. Copyright is held by the author/owner(s).

关键词： Compressed sensing

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Inferring Custom architectures from OpenCL 25

Inferring Custom Architectures from OpenCL

引用

25th International Workshop on Power and Timing Modeling, Optimization and Simulation (PATMOS)

作者： Kepa, Krzysztof Soni, Ritesh Athanas, Peter Virginia Tech Configurable Comp Lab Blacksburg VA 24061 USA

ISBN: (纸本)9781467394192

OpenCL has emerged as the de facto cross-platform standard in the GPU-based HPC computing domain. However, in FPGA-based HPC systems, OpenCL-to-FPGA compilers often yield suboptimal results due to the rigid architecture, limited shared-memory, and non-existent inter-work-item communication pathways implied by the OpenCL model. In this work, a methodology of inferring application-specific OpenCL "work-item" interfaces based on kernel code analysis is explored. A proof-of-concept prototype is implemented using an OpenCL source-to-source translator, which allows automated generation of the FPGA-based hardware accelerators directly from the OpenCL sources. the type and implementation of the inferred interface is tailored to match the data access patterns within the kernel. the inferred interface outperforms limitations of the OpenCL rigid architecture and communication model. the presented approach achieves a similar to 30x speedup over the generic memory-based approach for a 16 work-items application. A set of OpenCL coding patterns targeting FPGA-based HPC systems is also introduced. this technique is demonstrated on a popular bioinformatics algorithm, yet is applicable to any such algorithm with non-standard inter-cell communications.

关键词： high performance computing architecture hardware accelerator Communication Research kernel code Customs Customization Rigid

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Poster: An adaptive copy spraying scheme for data forwarding in mobile opportunistic networks 15

Poster: An adaptive copy spraying scheme for data forwarding...

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16th ACM International symposium on Mobile Ad Hoc Networking and computing, MobiHoc 2015

作者： Yuan, Peiyan Wang, Wei Wang, Chenyang School of Computer and Information Engineering Henan Normal University Xinxiang China

ISBN: (纸本)9781450334891

Mobile opportunistic network (MON) is a new paradigm which exploits node contacts to forward data, enabling numerous and impressive applications. the data copy spraying scheme is a challenging problem in MON, due to the mobility of nodes and lack of global knowledge, it hence captures great interests from research communities. Traditional algorithms allocate data copies with node’s statistical information and neglect the temporal contact feature, resulting in a poor delivery performance. We propose AS, an adaptive data copy spraying scheme in MON. AS adjusts the number of copies dynamically based on the temporal contact feature among nodes. theoretical analysis verifies that AS achieves a lower mean delivery delay than SprayWait, one of the state-of-the-art works. Simulation results show that AS improves the packet delivery ratio simultaneously. Copyright is held by the author/owner(s).

关键词： copy spraying data forwarding mobile opportunistic networks

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