QCDOC: A 10 Teraflops Computer for Tightly-Coupled Calculations
QCDOC: A 10 Teraflops Computer for Tightly-Coupled Calculations
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QCDOC：用于紧耦合计算的 10 Teraflops 计算机
DOI：
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发表时间：
2004
期刊：
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通讯作者：
C. Cristian
中科院分区：
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作者：
P. Boyle;Dong Chen;N. Christ;M. Clark;Saul D. Cohen;Z. Dong;A. Gara;B. Joó;C. Jung;L. Levkova;X. Liao;G. Liu;R. Mawhinney;S. Ohta;K. Petrov;T. Wettig;A. Yamaguchi;C. Cristian
强核力的数值模拟，被称为量子色动力学或QCD，已被证明是高性能计算中一个要求很高的前沿问题。在本报告中，我们描述了一种新的计算机，QCDOC (QCD On a Chip)，在QCD研究中为最优的价格/性能而设计。QCDOC使用六维低延迟网状网络连接处理节点，每个节点都包括一个由我们合作设计并由IBM制造的定制ASIC，以及DDR SDRAM。每个节点的峰值速度为每秒1Gigaflops，两台12288个节点、每秒10万亿次浮点运算的机器将于2004年秋季完成。目前，一台512节点的机器正在运行，其效率高达主导我们计算的共轭梯度解算器峰值的45%，一台耗资160万美元的4096节点的机器正在建设中。这将使我们的价格/性能低于每持续百万次浮点运算1美元。
Numerical simulations of the strong nuclear force, known as quantum chromodynamics or QCD, have proven to be a demanding, forefront problem in high-performance computing. In this report, we describe a new computer, QCDOC (QCD On a Chip), designed for optimal price/performance in the study of QCD. QCDOC uses a six-dimensional, low-latency mesh network to connect processing nodes, each of which includes a single custom ASIC, designed by our collaboration and built by IBM, plus DDR SDRAM. Each node has a peak speed of 1Gigaflops and two 12,288node, 10+ Teraflops machines are to be completed in the fall of 2004. Currently, a 512 node machine is running, delivering efficiencies as high as 45% of peak on the conjugate gradient solvers that dominate our calculations and a 4096-node machine with a cost of $1.6M is under construction. This should give us a price/performance less than $1per sustained Megaflops.