.png){kind=icon}
返回
Efficient parallel simulation of spatially-explicit agent-based epidemiological models
.png){kind=icon}
PRE
AI
DOI：10.1016/j.jpdc.2016.04.004.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Agent-based approaches enable simulation driven analysis and discovery of system-level properties using descriptive models of known behaviors of the entities constituting the system. Accordingly, a spatially explicit agent-based ecological modeling, parallel simulation, and analysis environment called SEARUMS has been developed. However, the conservatively synchronized parallel simulation infrastructure of SEARUMS did not scale effectively. Furthermore, the initial multithreaded shared-memory design prevented utilization of resources on multiple compute nodes of a distributed memory cluster. Consequently, the simulation infrastructure of SEARUMS was redesigned to operate as a Time Warp synchronized parallel and distributed discrete event simulation (PDES) on modern distributed-memory supercomputing platforms. The new PDES environment is called SEARUMS++. The spatially-explicit nature of the models posed several challenges in achieving scalable and efficient PDES, necessitating new approaches in SEARUMS++ for: (1) modeling spatial interactions and initial partitioning of agents, (2) logical migration of an agent during simulation using proxy agents to reflect migratory characteristics, and (3) ghosting of agents using multiple proxy agents to handle boundary cases that occur during logical migration of agents. This article presents our optimization efforts involving new methods to address aforementioned challenges. The design of SEARUMS++ and experimental evaluation of various alternatives that were explored to achieve scalable and efficient PDES are also discussed. Our experiments indicate that SEARUMS++ provides 200% performance improvement and maintains scalability to a larger number of processors, thus enabling efficient parallel simulation of spatially-explicit agent-based epidemiological models. (C) 2016 Elsevier Inc. All rights reserved.
Keyword:
Epidemiology
Avian influenza
Agent-based model
Spatially-explicit model
Parallel Discrete Event Simulation (PDES)
Time Warp
Logical process migration
Ghosting
期刊
IF:
4
论文数:
3.8K
被引数:
4.8K
机构
引用论文
.png){kind=icon}
Glycosidases Heterogeneity Among Dimethylhydrazine Induced Rat Colonic Tumours二甲基肼诱导的结肠肿瘤中糖苷酶的异质性
OAAI
OAAI分享收藏分享收藏
查看更多内容