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SCHEDULE: NOV 16-21, 2014
When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.
A Communication-Optimal Framework for Contracting Distributed Tensors
SESSION: Parallel Algorithms
EVENT TYPE: Papers, Best Paper Finalists
TIME: 4:00PM - 4:30PM
SESSION CHAIR: Judith C. Hill
AUTHOR(S):Samyam Rajbhandari, Akshay Nikam, Pai-Wei Lai, Kevin Stock, Sriram Krishnamoorthy, P. Sadayappan
ROOM:391-92
ABSTRACT:
Tensor contractions are extremely compute intensive generalized matrix multiplication operations encountered in many computational science fields, such as quantum chemistry and nuclear physics. Unlike distributed matrix multiplication, which has been extensively studied, limited work has been done in understanding distributed tensor contractions. In this paper, we characterize distributed tensor contraction algorithms on torus networks. We develop a framework with three fundamental communication operators to generate communication-efficient contraction algorithms for arbitrary tensor contractions. We show that for a given amount of memory per processor, our framework is communication optimal for all tensor contractions. We demonstrate performance and scalability of our framework on up to 262,144 cores of BG/Q supercomputer using five tensor contraction examples.
Chair/Author Details:
Judith C. Hill (Chair) - Oak Ridge National Laboratory
Samyam Rajbhandari - Ohio State University
Akshay Nikam - Ohio State University
Pai-Wei Lai - Ohio State University
Kevin Stock - Ohio State University
Sriram Krishnamoorthy - Pacific Northwest National Laboratory
P. Sadayappan - Ohio State University
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