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Featherlight on-the-fly false-sharing detection

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Xu LiuAuthors Info & Claims

PPoPP '18: Proceedings of the 23rd ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming

Pages 152 - 167

https://doi.org/10.1145/3178487.3178499

Published: 10 February 2018 Publication History

Abstract

Shared-memory parallel programs routinely suffer from false sharing---a performance degradation caused by different threads accessing different variables that reside on the same CPU cacheline and at least one variable is modified. State-of-the-art tools detect false sharing via a heavyweight process of logging memory accesses and feeding the ensuing access traces to an offline cache simulator. We have developed Feather, a lightweight, on-the-fly false-sharing detection tool. Feather achieves low overhead by exploiting two hardware features ubiquitous in commodity CPUs: the performance monitoring units (PMU) and debug registers. Additionally, Feather is a first-of-its-kind tool to detect false sharing in multi-process applications that use shared memory. Feather allowed us to scale false-sharing detection to myriad codes. Feather detected several false-sharing cases in important multi-core and multi-process codes including previous PPoPP artifacts. Eliminating false sharing resulted in dramatic (up to 16x) speedups.

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A featherlight on-the-fly false-sharing detection tool

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HPCToolkit performance tools: essential third party libraries for hpctoolkit

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HPCToolkit performance tools: measurement and analysis components

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HPCToolkit performance tools: libmonitor - a substrate for monitoring tools

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cover image ACM Conferences

PPoPP '18: Proceedings of the 23rd ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming

February 2018

442 pages

ISBN:9781450349826

DOI:10.1145/3178487

General Chair:
Andreas Krall
Vienna University of Technology, Austria
,
Program Chair:
Thomas R. Gross
ETH Zürich, Switzerland

ACM SIGPLAN Notices Volume 53, Issue 1
PPoPP '18
January 2018
426 pages
ISSN:0362-1340
EISSN:1558-1160
DOI:10.1145/3200691
Editor:
Matthew Fluet
Rodchester Institude of Technology
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Published: 10 February 2018

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February 24 - 28, 2018

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https://dl.acm.org/doi/10.1145/3691620.3695473
Su JGu NQi D(2024)ParaShareDetect: Dynamic Instrumentation and Runtime Analysis for False Sharing Detection in Parallel Computing2024 4th International Conference on Computer, Control and Robotics (ICCCR)10.1109/ICCCR61138.2024.10585404(230-235)Online publication date: 19-Apr-2024
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Zhou JSilvestro STang SYang HLiu HZeng GWu BLiu CLiu T(2023)MemPerf: Profiling Allocator-Induced Performance SlowdownsProceedings of the ACM on Programming Languages10.1145/36228487:OOPSLA2(1418-1441)Online publication date: 16-Oct-2023
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