计算机科学 ›› 2017, Vol. 44 ›› Issue (10): 26-32.doi: 10.11896/j.issn.1002-137X.2017.10.005
都志辉,林璋熙,顾彦祺,Eric O.LEBIGOT,郭翔宇
DU Zhi-hui, LIN Zhang-xi, GU Yan-qi, Eric O.LEBIGOT and GUO Xiang-yu
摘要: 引力波是爱因斯坦广义相对论的一个重要预言。大爆炸,特别是双黑洞、双中子星等双星系统是理论上最容易探测到的引力波波源。因为可以通过引力波了解这些重大的天体现象,所以对引力波的探测具有十分重要的科学意义。为此, 建造 了多个耗费巨资的基于激光干涉原理的引力波观测站(Laser Interferometer Gravitational-Wave Observatory,LIGO),以期能够首次直接探测到引力波。cWB(coherent Wave Burst)是一条能对多个观测站的数据进行实时分析处理的流水线。如何提高cWB程序的计算能力,成为了探测引力波的道路上亟待解决的问题。在分析cWB流水线特点的基础上,找到其性能瓶颈,设计并实现了一种有效的并行方法,在具有很强并行处理能力的GPU硬件上实现了对cWB流水线的加速。实验结果表明,与原来基于SSE优化加速的CPU实现相比,该CPU可以达到至少10倍的加速,这对于实现多个站点引力波信号的实时处理具有重要意义,在实时数据处理技术上为使用高精度的探测设备发现引力波提供了支持。
[1] FINLEY,DAVE.Einstein’s gravity theory passes toughest test yet:Bizarre binary star system pushes study of relativity to new limits[N].Phys.Org.,2013. [2] THORNE K.Gravitational Radiation in 300 Years of Gravitation[M].HAWKING S W,ISRAEL W,eds.Cambridge University Press,1987. [3] GERTSENSHTEIN M E,PUSTOVOIT V I .On the detection of low-frequency gravitational waves[J].Soviet Journal of Experimental and Theoretical Physics,1963,6(2):433. [4] CARON B,DOMINJON A,DREZEN C D,et al.The virgo interferometer[J].Classical and Quantum Gravity,1997,4(6):1461. [5] LUCK H,et al.The geo600 project[J].Classical and Quantum Gravity,1997,4(6):1471. [6] ANDO M,ARAI K,TAKAHASHI R,et al.Stable operation of a 300-m laser interferometer with sufficient sensitivity to detect gravitational-wave events within our galaxy[J].Phys.Rev.Lett.,2001,6:3950-3954. [7] HARRY G M,et al.Advanced ligo:the next generation of gravitational wave detectors[J].Classical and Quantum Gravity,2010,7(8):084006. [8] ASSNOVIC K,BODIK R,DEMMEL J,et al.A view of the parallel computing landscape[J].Communications of the ACM,2009,2(10):56-67. [9] OWENS J D,et al.A survey of general-purpose computation on graphics hardware[J].Computer Graphics Forum,2010,6(1):80-113. [10] TOP500 list of the world’s most powerful supercomputers.https://www.top500.org. [11] KLIMENKO S,et al.Coherent method for detection of gravitational wave bursts[J].Class.Quantum Grav.,2008,5:114029. [12] ABADIE J,et al.All-sky search for gravitational-wave bursts in the second joint LIGO-Virgo run[J].Phys.Rev.D,2012,5:12200. [13] LIU Y, DU Z H,CHUNG S K,et al.GPU-accelerated low-latency real-time searches for gravitational waves from compact binary coalescence[J].Classical and Quantum Gravity (CQG),2012,9(23):235018. |
No related articles found! |
|