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您的检索式：作者名="Peter Berczik"
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| 1 | Performance analysis of parallel gravitational N-body codes on large GPU clusters显示文摘We compare the performance of two very different parallel gravitational N-body codes for astrophysical simulations on large Graphics Processing Unit(GPU) clusters, both of which are pioneers in their own fields as well as on certain mutual scales- NBODY6++ and Bonsai. We carry out benchmarks of the two codes by analyzing their performance, accuracy and efficiency through the modeling of structure decomposition and timing measurements. We find that both codes are heavily optimized to leverage the computational potential of GPUs as their performance has approached half of the maximum single precision performance of the underlying GPU cards. With such performance we predict that a speed-up of200- 300 can be achieved when up to 1k processors and GPUs are employed simultaneously. We discuss the quantitative information about comparisons of the two codes, finding that in the same cases Bonsai adopts larger time steps as well as larger relative energy errors than NBODY6++, typically ranging from10- 50 times larger, depending on the chosen parameters of the codes. Although the two codes are built for different astrophysical applications, in specified conditions they may overlap in performance at certain physical scales, thus allowing the user to choose either one by fine-tuning parameters accordingly. | Si-Yi Huang Rainer Spurzem Peter Berczik | 2016 | Research in Astronomy and Astrophysics2016，16，1： | 1 |
| 2 | 一个基于共享内存的GPU资源调度器的设计与实现显示文摘集群作业管理系统目前对GPU资源的管理还不是很完善,尤其在单节点多GPU的情况下,经常由于GPU设备的使用冲突、负载不均等原因而导致GPU设备利用率低。为此,本文设计并实现了一种基于共享内存方式的GPU资源调度器,结合集群作业管理系统,可以自动为用户作业分配需要的GPU设备资源,避免多个GPU设备的使用冲突,从而使得GPU设备的使用率达到最高。基于SAPPORO的GPU多体模拟程序在本系统环境下得到了很好的应用。 | 李长华 崔辰州 Peter Berczik 薛随建 Rainer Spurzem | 2012 | 科研信息化技术与应用2012，3，5： | 0 |
| 3 | Fractions of Compact Object Binaries in Star Clusters:Theoretical Predictions显示文摘The binary population in field stars and star clusters contributes to the formation of gravitational wave(GW)sources.However,the fraction of compact-object binaries(CBs),which is an important feature parameter of binary populations,is still difficult to measure and very uncertain.This paper predicts the fractions of important CBs and semi-compact object binaries(SCBs) making use of an advanced stellar population synthesis technique.A comparison with the result of N-body simulation is also presented.It is found that most CBs are formed within about 500 Myr after the starburst.The fractions of CBs and SCBs are demonstrated to correlate with stellar metallicity.The higher the metallicity becomes,the smaller the fraction of black hole binaries(BHBs),neutron star binaries(NSBs) and SCBs.This suggests that the GW sources of BHBs and NSBs are more likely to form in metal-poor environments.However,the fraction of black hole-neutron star binaries is shown to be larger for metalrich populations on average. | Zhong-Mu Li Bhusan Kayastha Albrecht Kamlah Peter Berczik Yang-Yang Deng Rainer Spurzem | 2023 | Research in Astronomy and Astrophysics2023，23，2： | 0 |
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