research-article

Harmony: collection and analysis of parallel block vectors

Authors:

Melanie Kambadur,

Martha A. KimAuthors Info & Claims

ISCA '12: Proceedings of the 39th Annual International Symposium on Computer Architecture

Pages 452 - 463

Published: 09 June 2012 Publication History

Abstract

Efficient execution of well-parallelized applications is central to performance in the multicore era. Program analysis tools support the hardware and software sides of this effort by exposing relevant features of multithreaded applications. This paper describes parallel block vectors, which uncover previously unseen characteristics of parallel programs. Parallel block vectors provide block execution profiles per concurrency phase (e.g., the block execution profile of all serial regions of a program). This information provides a direct and fine-grained mapping between an application's runtime parallel phases and the static code that makes up those phases. This paper also demonstrates how to collect parallel block vectors with minimal application perturbation using Harmony. Harmony is an instrumentation pass for the LLVM compiler that introduces just 16-21% overhead on average across eight Parsec benchmarks.

We apply parallel block vectors to uncover several novel insights about parallel applications with direct consequences for architectural design. First, that the serial and parallel phases of execution used in Amdahl's Law are often composed of many of the same basic blocks. Second, that program features, such as instruction mix, vary based on the degree of parallelism, with serial phases in particular displaying different instruction mixes from the program as a whole. Third, that dynamic execution frequencies do not necessarily correlate with a block's parallelism.

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Cited By

Zhou FGan YMa SWang YArpaci-Dusseau AVoelker G(2018)wPerfProceedings of the 13th USENIX conference on Operating Systems Design and Implementation10.5555/3291168.3291207(527-543)Online publication date: 8-Oct-2018
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Ham TAragón JMartonosi M(2017)Decoupling Data Supply from Computation for Latency-Tolerant Communication in Heterogeneous ArchitecturesACM Transactions on Architecture and Code Optimization10.1145/307562014:2(1-27)Online publication date: 28-Jun-2017
https://dl.acm.org/doi/10.1145/3075620
Zhang WJi XSong BYu SChen HLi TYew PZhao W(2017)VarCatcherIEEE Transactions on Parallel and Distributed Systems10.1109/TPDS.2016.261352428:4(1215-1228)Online publication date: 1-Apr-2017
https://dl.acm.org/doi/10.1109/TPDS.2016.2613524
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Harmony: collection and analysis of parallel block vectors
1. General and reference
  1. Cross-computing tools and techniques
2. Software and its engineering
  1. Software notations and tools

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Published In

cover image ACM Conferences

ISCA '12: Proceedings of the 39th Annual International Symposium on Computer Architecture

June 2012

584 pages

ISBN:9781450316422

General Chair:
Shih-Lien Lu
Intel
,
Program Chair:
Josep Torrellas
University of Illinois

ACM SIGARCH Computer Architecture News Volume 40, Issue 3
ISCA '12
June 2012
559 pages
ISSN:0163-5964
DOI:10.1145/2366231
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IEEE Computer Society

United States

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Published: 09 June 2012

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ISCA '12

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SIGARCH

ISCA '12: The 39th Annual International Symposium on Computer Architecture

June 9 - 13, 2012

Oregon, Portland

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ISCA '12 Paper Acceptance Rate 47 of 262 submissions, 18%;

Overall Acceptance Rate 543 of 3,203 submissions, 17%

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Cited By

Zhou FGan YMa SWang YArpaci-Dusseau AVoelker G(2018)wPerfProceedings of the 13th USENIX conference on Operating Systems Design and Implementation10.5555/3291168.3291207(527-543)Online publication date: 8-Oct-2018
https://dl.acm.org/doi/10.5555/3291168.3291207
Ham TAragón JMartonosi M(2017)Decoupling Data Supply from Computation for Latency-Tolerant Communication in Heterogeneous ArchitecturesACM Transactions on Architecture and Code Optimization10.1145/307562014:2(1-27)Online publication date: 28-Jun-2017
https://dl.acm.org/doi/10.1145/3075620
Zhang WJi XSong BYu SChen HLi TYew PZhao W(2017)VarCatcherIEEE Transactions on Parallel and Distributed Systems10.1109/TPDS.2016.261352428:4(1215-1228)Online publication date: 1-Apr-2017
https://dl.acm.org/doi/10.1109/TPDS.2016.2613524
Rosà AChen LBinder W(2016)Actor profiling in virtual execution environmentsACM SIGPLAN Notices10.1145/3093335.299324152:3(36-46)Online publication date: 20-Oct-2016
https://dl.acm.org/doi/10.1145/3093335.2993241
Rosà AChen LBinder W(2016)Efficient profiling of actor-based applications in parallel and distributed systemsProceedings of the 11th Workshop on Implementation, Compilation, Optimization of Object-Oriented Languages, Programs and Systems10.1145/3012408.3012418(1-3)Online publication date: 17-Jul-2016
https://dl.acm.org/doi/10.1145/3012408.3012418
Rosà AChen LBinder WFischer BSchaefer I(2016)Actor profiling in virtual execution environmentsProceedings of the 2016 ACM SIGPLAN International Conference on Generative Programming: Concepts and Experiences10.1145/2993236.2993241(36-46)Online publication date: 20-Oct-2016
https://dl.acm.org/doi/10.1145/2993236.2993241
Rosà AChen LBinder WToth MFritchie S(2016)Profiling actor utilization and communication in AkkaProceedings of the 15th International Workshop on Erlang10.1145/2975969.2975972(24-32)Online publication date: 23-Sep-2016
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Ham TAragón JMartonosi MPrvulovic M(2015)DeSCProceedings of the 48th International Symposium on Microarchitecture10.1145/2830772.2830800(191-203)Online publication date: 5-Dec-2015
https://dl.acm.org/doi/10.1145/2830772.2830800
Curtsinger CBerger EMiller EHand S(2015)CozProceedings of the 25th Symposium on Operating Systems Principles10.1145/2815400.2815409(184-197)Online publication date: 4-Oct-2015
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Railing BHein EConte T(2015)ContechACM Transactions on Architecture and Code Optimization10.1145/277689312:2(1-24)Online publication date: 8-Jul-2015
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