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Abstract Machine Models and Proxy Architectures for Exascale Computing

Ang, James A.; Barrett, Richard F.; Benner, R.E.; Burke, Daniel B.; Chan, Cy P.; Cook, Jeanine C.; Daley, Christopher D.; Donofrio, Dave D.; Hammond, Simon D.; Hemmert, Karl S.; Hoekstra, Robert J.; Ibrahim, Khaled I.; Kelly, Suzanne M.; Le, Hoang L.; Leung, Vitus J.; Michelogiannakis, George M.; Resnick, David R.; Rodrigues, Arun; Shalf, John S.; Stark, Dylan S.; Unat, D.U.; Wright, Nick W.; Voskuilen, Gwendolyn R.

Machine Models and Proxy Architectures for Exascale Computing Version 2.0 Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 94550 Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. Approved for public release; further dissemination unlimited. Issued by Sandia National Laboratories, operated for the United States Department of Energy by Sandia Corporation. NOTICE: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government, nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors, or their employees, make any warranty, express or implied, or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or rep- resent that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government, any agency thereof, or any of their contractors or subcontractors. The views and opinions expressed herein do not necessarily state or reflect those of the United States Government, any agency thereof, or any of their contractors. Printed in the United States of America. This report has been reproduced directly from the best available copy. Available to DOE and DOE contractors from U.S. Department of Energy Office of Scientific and Technical Information P.O. Box 62 Oak Ridge, TN 37831 Telephone: (865) 576-8401 Facsimile: (865) 576-5728 E-Mail: reports@adonis.osti.gov Online ordering: http://www.osti.gov/bridge Available to the public from U.S. Department of Commerce National Technical Information Service 5285 Port Royal Rd Springfield, VA 22161 Telephone: (800) 553-6847 Facsimile: (703) 605-6900 E-Mail: orders@ntis.fedworld.gov Online ordering: http://www.ntis.gov/help/ordermethods.asp?loc=7-4-0#online D E P A R T M E N T O F E N E R G Y * * U N I T E D S T A T E S O F A M E R I C A SAND2016-6049 Unlimited Release Printed Abstract Machine Models and Proxy Architectures for Exascale Computing Version 2.0 J.A. Ang 1 , R.F. Barrett 1 , R.E. Benner 1 , D. Burke 2 , C. Chan 2 , J. Cook 1 , C.S. Daley 2 , D. Donofrio 2 , S.D. Hammond 1 , K.S. Hemmert 1 , R.J. Hoekstra 1 , K. Ibrahim 2 , S.M. Kelly 1 , H. Le, V.J. Leung 1 , G. Michelogiannakis 2 , D.R. Resnick 1 , A.F. Rodrigues 1 , J. Shalf 2 , D. Stark, D. Unat, N.J. Wright 2 , G.R. Voskuilen 1 1 1 Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-MS 1319 2 Lawrence Berkeley National Laboratory, Berkeley, California Abstract To achieve exascale computing, fundamental hardware architectures must change. The most sig- nificant consequence of this assertion is the impact on the scientific and engineering applications that run on current high performance computing (HPC) systems, many of which codify years of scientific domain knowledge and refinements for contemporary computer systems. In order to adapt to exascale architectures, developers must be able to reason about new hardware and deter- mine what programming models and algorithms will provide the best blend of performance and energy efficiency into the future. While many details of the exascale architectures are undefined, an abstract machine model is designed to allow application developers to focus on the aspects of the machine that are important or relevant to performance and code structure. These models are intended as communication aids between application developers and hardware architects during the co-design process. We use the term proxy architecture to describe a parameterized version of an abstract machine model, with the parameters added to elucidate potential speeds and capacities of key hardware components. These more detailed architectural models are formulated to enable discussion between the developers of analytic models and simulators and computer hardware archi- tects. They allow for application performance analysis and hardware optimization opportunities. In this report our goal is to provide the application development community with a set of mod- els that can help software developers prepare for exascale. In addition, through the use of proxy architectures, we can enable a more concrete exploration of how well new and evolving applica- tion codes map onto future architectures. This second version of the document addresses system scale considerations and provides a system-level abstract machine model with proxy architecture information.

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TYPE SAND Report YEAR 2016
OSTIDOI

Advanced Simulation and Computing Co-Design Strategy

Ang, James A.; Hoang, Thuc T.; Kelly, Suzanne M.; McPherson, Allen M.; Neely, Rob N.

This ASC Co-design Strategy lays out the full continuum and components of the co-design process, based on what we have experienced thus far and what we wish to do more in the future to meet the program’s mission of providing high performance computing (HPC) and simulation capabilities for NNSA to carry out its stockpile stewardship responsibility.

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TYPE Other Report YEAR 2015
OSTIDOI

High performance computing co-design strategies

ACM International Conference Proceeding Series

Ang, James A.

The MEMSYS Call for Papers contains this passage: Many of the problems we see in the memory system are cross-disciplinary in nature - Their solution would likely require work at all levels, from applications to circuits. Thus, while the scope of the problem is memory, the scope of the solutions will be much wider. The Department of Energy's (DOE) high performance computing (HPC) community is thinking about how to define, support and execute work at all levels for the development of future supercomputers to run our portfolio of mission applications. Borrowing a concept from embedded computing, the DOE HPC community is calling our work at all levels co-design [1]. Codesign for embedded computing is focused on hardware/software partitioning of activities to execute a well-defined task within specific constraints. Co-design for general-purpose HPC has many dimensions for both the work to be performed and the constraints, e.g. hardware designs, runtime software, applications and algorithms. The subject of this extended abstract is a description of two alternative DOE HPC co-design strategies. While DOE co-design efforts include more than the memory system, as noted in the MEMSYS call, the memory system impacts applications, circuits and all levels between.

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TYPE Conference Poster YEAR 2015
ScopusOSTIDOI
Results 1–25 of 76
Results 1–25 of 76