Oak Ridge National Laboratory recently received delivery of a 5,294 processor Cray XT3. The XT3 is Cray's third-generation massively parallelprocessing system. The system builds on a single processor node - built...
详细信息
Oak Ridge National Laboratory recently received delivery of a 5,294 processor Cray XT3. The XT3 is Cray's third-generation massively parallelprocessing system. The system builds on a single processor node - built around the AMD Opteron - and uses a custom chip - called SeaStar - to provide interprocess or communication. In addition, the system uses a lightweight operating system on the compute nodes. This paper describes our initial experiences with the system, including micro-benchmark, kernel, and application benchmark results. In particular, we provide performance results for strategic Department of Energy applications areas including climate and fusion. We demonstrate experiments on the installed system, scaling applications up to 4,096 processors.
Monte Carlo (MC) simulation is one of the popular approaches for approximating the value of options and other derivative securities due to the absence of straightforward closed form solutions for many financial models...
详细信息
This is intended to be a quick introduction to membrane computing, a branch of natural computing inspired in the structure and functioning of living cells and in their organization in tissues. The corresponding models...
详细信息
ISBN:
(纸本)9781424400546
This is intended to be a quick introduction to membrane computing, a branch of natural computing inspired in the structure and functioning of living cells and in their organization in tissues. The corresponding models, called P systems, are paralleldistributed computing devices, handling multisets of abstract objects in a compartmentalized architecture defined by cell-like or tissue-like membrane arrangements
Graph alliances are recently developed global properties of any symmetric graph. Our purpose in the present paper is to design self-stabilizing fault tolerant distributed algorithms for the global offensive and the gl...
详细信息
ISBN:
(纸本)9781424400546
Graph alliances are recently developed global properties of any symmetric graph. Our purpose in the present paper is to design self-stabilizing fault tolerant distributed algorithms for the global offensive and the global defensive alliance in a given arbitrary graph. We also provide complete analysis of the convergence time of both the algorithms
This paper presents a parallel framework of grid-based numerical algorithms where data dependencies between grid zones can be modeled by a directed acyclic graph (DAG). It consists of three parts on how to partition, ...
详细信息
ISBN:
(纸本)9781424400546
This paper presents a parallel framework of grid-based numerical algorithms where data dependencies between grid zones can be modeled by a directed acyclic graph (DAG). It consists of three parts on how to partition, order and calculate the vertices of digraph. Numerical results using hundreds of processors on two parallel machines show the efficiencies and moderate scalability of this framework
Computer science and especially heterogeneous distributed computing is an experimental science. Simulation, emulation, or in-situ implementation are complementary methodologies to conduct experiments in this context. ...
详细信息
ISBN:
(纸本)9781424400546
Computer science and especially heterogeneous distributed computing is an experimental science. Simulation, emulation, or in-situ implementation are complementary methodologies to conduct experiments in this context. In this paper, we address the problem of defining and controlling the heterogeneity of a platform. We evaluate the proposed solution, called Wrekavoc, with micro-benchmark and by implementing algorithms of the literature.
A radically new approach will be described for the fully distributed and dynamic management of advanced crisis relief operations and missions. It is based on the installation of a universal "social" module i...
详细信息
ISBN:
(纸本)9728865597
A radically new approach will be described for the fully distributed and dynamic management of advanced crisis relief operations and missions. It is based on the installation of a universal "social" module in many existing and massively used data processing and control devices, including (but not limited to) internet hosts, laptops, mobile robots and mobile phones. These modules can collectively interpret a special scenario language while exchanging higher-level program code with accompanying data and control in parallel. This can dynamically integrate any scattered post-disaster human and technical resources into an operable distributed system which, from one side, is effectively supervised externally, and from the other side, is capable of solving complex self-analysis, coordination, survivability, relief, and reconstruction problems autonomously.
Managing reconfigurable hardware resources at runtime is expected to be a new task for future operating systems. But due to the mixture of parallel and sequential parts of dynamically reconfigurable applications, it i...
详细信息
ISBN:
(纸本)9781424400546
Managing reconfigurable hardware resources at runtime is expected to be a new task for future operating systems. But due to the mixture of parallel and sequential parts of dynamically reconfigurable applications, it is not entirely clear so far, how to use and to program such systems. A new interpretation of dynamically reconfigurable applications is presented. It is shown, that the parallel computing concept of distributed object systems may be adapted for dynamically reconfigurable architectures. This approach answers many open questions concerning communication, interruption, and relocation of reconfigurable modules. It is explored by means of an extended Linux operating system in conjunction with a SystemC model of a dynamically reconfigurable FPGA
This paper presents TPCC-UVa, an open-source implementation of the TPC-C benchmark intended to be used in parallel and distributed systems. TPCC-UVa is written entirely in C language and it uses the Post-greSQL databa...
详细信息
ISBN:
(纸本)9781424400546
This paper presents TPCC-UVa, an open-source implementation of the TPC-C benchmark intended to be used in parallel and distributed systems. TPCC-UVa is written entirely in C language and it uses the Post-greSQL database engine. This implementation includes all the functionalities described by the TPC-C standard specification for the measurement of both uni- and multiprocessor systems performance. The major characteristics of the TPC-C specification are discussed, together with a description of the TPCC-UVa implementation and architecture and real examples of performance measurements
Workforce planning is an important activity that enables organizations to determine the workforce needed for continued success. A workforce planning problem is a very complex task that requires modern techniques to be...
详细信息
ISBN:
(纸本)9781424400546
Workforce planning is an important activity that enables organizations to determine the workforce needed for continued success. A workforce planning problem is a very complex task that requires modern techniques to be solved adequately. In this work, we describe the development of two parallel metaheuristic methods, a parallel genetic algorithm and a parallel scatter search, which can find high-quality solutions to 20 different problem instances. Our experiments show that parallel versions do not only allow to reduce the execution time but they also improve the solution quality
暂无评论