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arXiv 1602.05232cs.DScs.DC
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高效的并行和增量图连接

Work-Efficient Parallel and Incremental Graph Connectivity

Natcha Simsiri, Kanat Tangwongsan, Srikanta Tirthapura, Kun-Lung Wu

摘要:

在一个不断被高速边流更新的进化图上,如果两个顶点是连通的,如何有效地保持?这就是连通性问题,一个基本的和广泛研究的问题。我们提出了第一个共享内存并行算法的增量图连接,这是既可证明的工作效率和多对数并行深度。我们还提出了一个简单的算法,略差的理论性质,但它更容易实现,并具有良好的实际性能。我们的实验表明,在$20$核机器上每秒的吞吐量为数亿条边。

英文摘要:

On an evolving graph that is continuously updated by a high-velocity stream of edges, how can one efficiently maintain if two vertices are connected? This is the connectivity problem, a fundamental and widely studied problem on graphs. We present the first shared-memory parallel algorithm for incremental graph connectivity that is both provably work-efficient and has polylogarithmic parallel depth. We also present a simpler algorithm with slightly worse theoretical properties, but which is easier to implement and has good practical performance. Our experiments show a throughput of hundreds of millions of edges per second on a $20$-core machine.

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