IEEE Transactions on Parallel and Distributed Systems

IEEE Transactions on Parallel and Distributed Systems (TPDS) is a scholarly archival journal published monthly. Parallelism and distributed computing are foundational research and technology to rapidly advance computer systems and their applications. Read the full scope of TPDS

IEEE Transactions on Parallel and Distributed Systems (TPDS) has moved to the OnlinePlus publication model.

From the July 2015 Issue

Design of a Multithreaded Barnes-Hut Algorithm for Multicore Clusters

By Junchao Zhang, Babak Behzad, and Marc Snir

Free Featured ArticleWe describe in this paper an implementation of the Barnes-Hut algorithm on multicore clusters. Based on a partitioned global address space (PGAS) library, the design integrates intranode multithreading and internode one-sided communication, exemplifying a PGAS $+$ X programming style. Within a node, the computation is decomposed into tasks (subtasks) and multitasking is used to hide network latency. We study the tradeoffs between locality in private caches and locality in shared caches and bring the insights into the design. As a result, our implementation consumes less memory per core, invokes less internode communication, and enjoys better load-balancing strategies. The final code achieves up to 41 percent performance improvement over a non-multithreaded counterpart. Through detailed comparison, we also show its advantages over other well-known Barnes-Hut implementations, both in programming complexity and in performance.

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  • According to Thomson Reuters' 2013 Journal Citation Report, TPDS has an impact factor of 2.173.

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