R. Ammendola, A. Biagioni, O. Frezza, F. Lo Cicero, A. Lonardo, P. Paolucci, D. Rossetti, F. Simula, L. Tosoratto, P. Vicini
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引用次数: 20
摘要
QUonG是国家核物理研究所(Istituto Nazionale di Fisica Nucleare)的一项倡议,旨在开发一种专用于Lattice QCD计算的高性能计算系统。QUonG是一个大规模并行计算平台,它利用了商用多核处理器和上一代gpu。其网络网格利用LQCD算法的特点,设计了一个点对点、高性能、低延迟的三维环面网络,实现了计算节点之间的互联。该网络建立在APE net+项目的基础上:它由一个基于fpga的PCI Express板组成,暴露了6个完整的双向板外链路,每个链路运行速度为34 Gbps,并实现了RDMA协议和一个实验性的直接网络到gpu接口,从而大大减少了节点间数据传输的访问延迟。一个完整的QUonG部署的最终形状是一个标准42U机架的组装,每个机架的峰值性能为60 TFlops/机架,成本为5 Ke/TFlops,估计功耗为25 KW/机架。第一架QUonG系统原型预计将在2011年底交付。
QUonG: A GPU-based HPC System Dedicated to LQCD Computing
QUonG is an INFN (Istituto Nazionale di Fisica Nucleare) initiative targeted to develop a high performance computing system dedicated to Lattice QCD computations. QUonG is a massively parallel computing platform that lever-ages on commodity multi-core processors coupled with last generation GPUs. Its network mesh exploits the characteristics of LQCD algorithm for the design of a point-to-point, high performance, low latency 3-d torus network to interconnect the computing nodes. The network is built upon the APE net+ project: it consists of an FPGA-based PCI Express board exposing six full bidirectional off-board links running at 34 Gbps each, and implementing RDMA protocol and an experimental direct network-to-GPU interface, enabling significant access latency reduction for inter-node data transfers. The final shape of a complete QUonG deployment is an assembly of standard 42U racks, each one capable of 60 TFlops/rack of peak performance, at a cost of 5 Ke/TFlops and for an estimated power consumption of 25 KW/rack. A first QUonG system prototype is expected to be delivered at the end of the year 2011.