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  1. Proceedings of the 2012 Haskell Symposium (Haskell '12)
  2. Vectorisation avoidance
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The HERMIT in the machine: a plugin for the interactive transformation of GHC core language programs
Guiding parallel array fusion with indexed types
Testing type class laws
Surveyor: a DSEL for representing and analyzing strongly typed surveys
Dependently typed programming with singletons
Layout-sensitive language extensibility with SugarHaskell
Template your boilerplate: using template haskell for efficient generic programming
Vectorisation avoidance
Feat: functional enumeration of algebraic types
Wormholes: introducing effects to FRP
xmonad in Coq (experience report): programming a window manager in a proof assistant
Shrinking and showing functions: (functional pearl)
Monoids: theme and variations (functional pearl)
Safe haskell

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Vectorisation avoidance

Content Provider ACM Digital Library
Author Peyton Jones, Simon Lippmeier, Ben Leshchinskiy, Roman Chakravarty, Manuel M.T. Keller, Gabriele
Abstract Flattening nested parallelism is a vectorising code transform that converts irregular nested parallelism into flat data parallelism. Although the result has good asymptotic performance, flattening thoroughly restructures the code. Many intermediate data structures and traversals are introduced, which may or may not be eliminated by subsequent optimisation. We present a novel program analysis to identify parts of the program where flattening would only introduce overhead, without appropriate gain. We present empirical evidence that avoiding vectorisation in these cases leads to more efficient programs than if we had applied vectorisation and then relied on array fusion to eliminate intermediates from the resulting code.
Starting Page 37
Ending Page 48
Page Count 12
File Format PDF
ISBN 9781450315746
DOI 10.1145/2364506.2364512
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2012-09-13
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Nested data parallelism Program transformation Haskell
Content Type Text
Resource Type Article
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