NDLI: X10 and APGAS at Petascale

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X10 and APGAS at Petascale

Content Provider	ACM Digital Library
Author	Saraswat, Vijay Grove, David Kambadur, Prabhanjan Shinnar, Avraham Zhang, Wei Tardieu, Olivier Herta, Benjamin Takeuchi, Mikio Vaziri, Mandana Cunningham, David
Copyright Year	2016
Abstract	X10 is a high-performance, high-productivity programming language aimed at large-scale distributed and shared-memory parallel applications. It is based on the Asynchronous Partitioned Global Address Space (APGAS) programming model, supporting the same fine-grained concurrency mechanisms within and across shared-memory nodes. We demonstrate that X10 delivers solid performance at petascale by running (weak scaling) eight application kernels on an IBM Power--775 supercomputer utilizing up to 55,680 Power7 cores (for 1.7Pflop/s of theoretical peak performance). For the four HPC Class 2 Challenge benchmarks, X10 achieves 41% to 87% of the system’s potential at scale (as measured by IBM’s HPCC Class 1 optimized runs). We also implement K-Means, Smith-Waterman, Betweenness Centrality, and Unbalanced Tree Search (UTS) for geometric trees. Our UTS implementation is the first to scale to petaflop systems. We describe the advances in distributed termination detection, distributed load balancing, and use of high-performance interconnects that enable X10 to scale out to tens of thousands of cores. We discuss how this work is driving the evolution of the X10 language, core class libraries, and runtime systems.
Starting Page	1
Ending Page	32
Page Count	32
File Format	PDF
ISSN	23294949
e-ISSN	23294957
DOI	10.1145/2894746
Volume Number	2
Issue Number	4
Journal	ACM Transactions on Parallel Computing (TOPC)
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2016-03-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	APGAS X10 Performance Scalability
Content Type	Text
Resource Type	Article
Subject	Hardware and Architecture Modeling and Simulation Computer Science Applications Software Computational Theory and Mathematics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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