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Title: Report of experiments and evidence for ASC L2 milestone 4467 : demonstration of a legacy application's path to exascale.

Abstract

This report documents thirteen of Sandia's contributions to the Computational Systems and Software Environment (CSSE) within the Advanced Simulation and Computing (ASC) program between fiscal years 2009 and 2012. It describes their impact on ASC applications. Most contributions are implemented in lower software levels allowing for application improvement without source code changes. Improvements are identified in such areas as reduced run time, characterizing power usage, and Input/Output (I/O). Other experiments are more forward looking, demonstrating potential bottlenecks using mini-application versions of the legacy codes and simulating their network activity on Exascale-class hardware. The purpose of this report is to prove that the team has completed milestone 4467-Demonstration of a Legacy Application's Path to Exascale. Cielo is expected to be the last capability system on which existing ASC codes can run without significant modifications. This assertion will be tested to determine where the breaking point is for an existing highly scalable application. The goal is to stretch the performance boundaries of the application by applying recent CSSE RD in areas such as resilience, power, I/O, visualization services, SMARTMAP, lightweight LWKs, virtualization, simulation, and feedback loops. Dedicated system time reservations and/or CCC allocations will be used to quantify the impact of system-levelmore » changes to extend the life and performance of the ASC code base. Finally, a simulation of anticipated exascale-class hardware will be performed using SST to supplement the calculations. Determine where the breaking point is for an existing highly scalable application: Chapter 15 presented the CSSE work that sought to identify the breaking point in two ASC legacy applications-Charon and CTH. Their mini-app versions were also employed to complete the task. There is no single breaking point as more than one issue was found with the two codes. The results were that applications can expect to encounter performance issues related to the computing environment, system software, and algorithms. Careful profiling of runtime performance will be needed to identify the source of an issue, in strong combination with knowledge of system software and application source code.« less

Authors:
; ; ; ; ; ;  [1]; ; ; ; ; ; ; ; ; ; ; ; ;  [1] more »;  [1]; ; ;  [2]; « less
  1. (Sandia National Laboratories, Livermore, CA)
  2. (Open Grid Computing, Inc., Austin, TX)
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
1039013
Report Number(s):
SAND2012-1750
TRN: US201209%%299
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ALGORITHMS; FEEDBACK; MODIFICATIONS; PERFORMANCE; SIMULATION

Citation Formats

Curry, Matthew L., Ferreira, Kurt Brian, Pedretti, Kevin Thomas Tauke, Leung, Vitus Joseph, Moreland, Kenneth D., Lofstead, Gerald Fredrick, II, Gentile, Ann C., Klundt, Ruth Ann, Ward, H. Lee, Laros, James H., III, Hemmert, Karl Scott, Fabian, Nathan D., Levenhagen, Michael J., Barrett, Brian W., Brightwell, Ronald Brian, Barrett, Richard, Wheeler, Kyle Bruce, Kelly, Suzanne Marie, Rodrigues, Arun F., Brandt, James M., Thompson, David, VanDyke, John P., Oldfield, Ron A., Tucker, Thomas, and Vaughan, Courtenay Thomas. Report of experiments and evidence for ASC L2 milestone 4467 : demonstration of a legacy application's path to exascale.. United States: N. p., 2012. Web. doi:10.2172/1039013.
Curry, Matthew L., Ferreira, Kurt Brian, Pedretti, Kevin Thomas Tauke, Leung, Vitus Joseph, Moreland, Kenneth D., Lofstead, Gerald Fredrick, II, Gentile, Ann C., Klundt, Ruth Ann, Ward, H. Lee, Laros, James H., III, Hemmert, Karl Scott, Fabian, Nathan D., Levenhagen, Michael J., Barrett, Brian W., Brightwell, Ronald Brian, Barrett, Richard, Wheeler, Kyle Bruce, Kelly, Suzanne Marie, Rodrigues, Arun F., Brandt, James M., Thompson, David, VanDyke, John P., Oldfield, Ron A., Tucker, Thomas, & Vaughan, Courtenay Thomas. Report of experiments and evidence for ASC L2 milestone 4467 : demonstration of a legacy application's path to exascale.. United States. doi:10.2172/1039013.
Curry, Matthew L., Ferreira, Kurt Brian, Pedretti, Kevin Thomas Tauke, Leung, Vitus Joseph, Moreland, Kenneth D., Lofstead, Gerald Fredrick, II, Gentile, Ann C., Klundt, Ruth Ann, Ward, H. Lee, Laros, James H., III, Hemmert, Karl Scott, Fabian, Nathan D., Levenhagen, Michael J., Barrett, Brian W., Brightwell, Ronald Brian, Barrett, Richard, Wheeler, Kyle Bruce, Kelly, Suzanne Marie, Rodrigues, Arun F., Brandt, James M., Thompson, David, VanDyke, John P., Oldfield, Ron A., Tucker, Thomas, and Vaughan, Courtenay Thomas. Thu . "Report of experiments and evidence for ASC L2 milestone 4467 : demonstration of a legacy application's path to exascale.". United States. doi:10.2172/1039013. https://www.osti.gov/servlets/purl/1039013.
@article{osti_1039013,
title = {Report of experiments and evidence for ASC L2 milestone 4467 : demonstration of a legacy application's path to exascale.},
author = {Curry, Matthew L. and Ferreira, Kurt Brian and Pedretti, Kevin Thomas Tauke and Leung, Vitus Joseph and Moreland, Kenneth D. and Lofstead, Gerald Fredrick, II and Gentile, Ann C. and Klundt, Ruth Ann and Ward, H. Lee and Laros, James H., III and Hemmert, Karl Scott and Fabian, Nathan D. and Levenhagen, Michael J. and Barrett, Brian W. and Brightwell, Ronald Brian and Barrett, Richard and Wheeler, Kyle Bruce and Kelly, Suzanne Marie and Rodrigues, Arun F. and Brandt, James M. and Thompson, David and VanDyke, John P. and Oldfield, Ron A. and Tucker, Thomas and Vaughan, Courtenay Thomas},
abstractNote = {This report documents thirteen of Sandia's contributions to the Computational Systems and Software Environment (CSSE) within the Advanced Simulation and Computing (ASC) program between fiscal years 2009 and 2012. It describes their impact on ASC applications. Most contributions are implemented in lower software levels allowing for application improvement without source code changes. Improvements are identified in such areas as reduced run time, characterizing power usage, and Input/Output (I/O). Other experiments are more forward looking, demonstrating potential bottlenecks using mini-application versions of the legacy codes and simulating their network activity on Exascale-class hardware. The purpose of this report is to prove that the team has completed milestone 4467-Demonstration of a Legacy Application's Path to Exascale. Cielo is expected to be the last capability system on which existing ASC codes can run without significant modifications. This assertion will be tested to determine where the breaking point is for an existing highly scalable application. The goal is to stretch the performance boundaries of the application by applying recent CSSE RD in areas such as resilience, power, I/O, visualization services, SMARTMAP, lightweight LWKs, virtualization, simulation, and feedback loops. Dedicated system time reservations and/or CCC allocations will be used to quantify the impact of system-level changes to extend the life and performance of the ASC code base. Finally, a simulation of anticipated exascale-class hardware will be performed using SST to supplement the calculations. Determine where the breaking point is for an existing highly scalable application: Chapter 15 presented the CSSE work that sought to identify the breaking point in two ASC legacy applications-Charon and CTH. Their mini-app versions were also employed to complete the task. There is no single breaking point as more than one issue was found with the two codes. The results were that applications can expect to encounter performance issues related to the computing environment, system software, and algorithms. Careful profiling of runtime performance will be needed to identify the source of an issue, in strong combination with knowledge of system software and application source code.},
doi = {10.2172/1039013},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {3}
}

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