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| 1 | Sunway supercomputer architecture towards exascale computing:analysis and practice显示文摘In recent years,the improvements of system performance and energy efficiency for supercomputers have faced increasing challenges,which create more intensive demands on the architecture design for realizing exascale computing.This paper first analyzes the main requirements of exascale computing on the aspects of the parallel computing application and supercomputing center operation.Afterwards,a mapping scheme of'demands-challenges-architecture'is proposed.Then,the major challenges of exascale supercomputer,such as scalability,power consumption,data movement,programming and availability,are thoroughly analyzed,and the corresponding appropriate solutions are proposed.Moreover,this paper proposes the Sunway computer architecture towards exascale computing in which the many-core processor,network chipset and software system are all domestically-designed.The technology roadmap of Sunway supercomputer will hold the comprehensive design methods for the architecture,including the processor,interconnect network,assembly structure,power supply,cooling system,system software,parallel algorithm and application support,promising great advances for exascale supercomputing. | Jiangang GAO Fang ZHENG Fengbin QI Yajun DING Hongliang LI Hongsheng LU Wangquan HE Hongmei WEI Lifeng JIN Xin LIU Daoyong GONG Fei WANG Yan ZHENG Honghui SUN Zhou ZHOU Yong LIU Hongtao YOU | 2021 | Science China(Information Sciences)2021，64，4： | 3 |
| 2 | CUDA's Mapped Memory to Support I/O Functions on GPU显示文摘The API interfaces provided by CUDA help programmers to get high performance CUDA applications in GPU,but they cannot support most I/O operations in device codes.The characteristics of CUDA’s mapped memory are used here to create a dynamic polling service model in the host which can satisfy most I/O functions such as read/write file and'printf'.The technique to implement these I/O functions has some influence on the performance of the original applications.These functions quickly respond to the users’I/O requirements with the'printf'performance better than CUDA’s.An easy and effective real-time method is given for users to debug their programs using the I/O functions.These functions improve productivity of converting legacy C/C++codes to CUDA and broaden CUDA’s functions. | Wei Wu Fengbin Qi Wangquan He Shanshan Wang | 2013 | Tsinghua Science and Technology2013，18，6： | 0 |
| 3 | Theoretical and technical progress in exploration practice of the deep-water large oil fields, Santos Basin, Brazil显示文摘The history and results of petroleum exploration in the Santos Basin, Brazil are reviewed. The regularity of hydrocarbon enrichment and the key exploration technologies are summarized and analyzed using the seismic, gravity, magnetic and drilling data. It is proposed that the Santos Basin had a structural pattern of two uplifts and three depressions and the Aram-Uirapuru uplift belt controlled the hydrocarbon accumulation. It is believed that the main hydrocarbon source kitchen in the rift period controlled the hydrocarbon-enriched zones, paleo-structures controlled the scale and quality of lacustrine carbonate reservoirs, and continuous thick salt rocks controlled the hydrocarbon formation and preservation. The process and mechanism of reservoirs being transformed by CO_(2)charging were revealed. Five key exploration technologies were developed,including the variable-velocity mapping for layer-controlled facies-controlled pre-salt structures, the prediction of lacustrine carbonate reservoirs, the prediction of intrusive/effusive rock distribution, the detection of hydrocarbons in lacustrine carbonates, and the logging identification of supercritical CO_(2)fluid. These theoretical recognitions and exploration technologies have contributed to the discovery of deep-water super-large reservoirs under CNODC projects in Brazil, and will guide the further exploration of deep-water large reservoirs in the Santos Basin and other similar regions. | HE Wenyuan SHI Buqing FAN Guozhang WANG Wangquan WANG Hongping WANG Jingchun ZUO Guoping WANG Chaofeng YANG Liu | 2023 | Petroleum Exploration and Development2023，50，2： | 0 |
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