SC13 Home > SC13 Schedule > SC13 Presentation - Optimizing the Barnes-Hut Algorithm for Multicore Clusters

SCHEDULE: NOV 16-22, 2013

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Optimizing the Barnes-Hut Algorithm for Multicore Clusters

SESSION: Research Poster Reception

EVENT TYPE: Posters, Electronic Posters, and Education Posters

TIME: 5:15PM - 7:00PM

AUTHOR(S):Junchao Zhang, Babak Behzad, Marc Snir

ROOM:Mile High Pre-Function

Nowadays all supercomputers are multicore clusters with one-sided communication support. It is important to explore new programming models for them. Partitioned global address space (PGAS) languages have drawn much attention in recent years. However, there are few application mapping studies. In this paper, through the Barnes-Hut algorithm, we demonstrate a PGAS + X programing paradigm specifically targeting multicore clusters. The novelty is that we integrate intranode multithreading with internode one-sided communication. we decompose computation into tasks and hide network latency by descheduling tasks that are blocked on a remote access and reusing the core to run another, ready to execute task. We spawn multiple threads per process, which do either communication or computation. We show how to manage tasks and do thread synchronization. We are in progress of designing runtime abstractions. We show details of the design, particularly the task management. We use experiment results to show benefits gained.

Chair/Author Details:

Junchao Zhang - University of Illinois at Urbana-Champaign

Babak Behzad - University of Illinois at Urbana-Champaign

Marc Snir - University of Illinois at Urbana-Champaign

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