Thilo Kielmann, Andrea Clematis, Sergei Gorlatch, Alexey's Euro-Par 2010 - Parallel Processing: 16th International PDF

By Thilo Kielmann, Andrea Clematis, Sergei Gorlatch, Alexey Lastovetsky (auth.), Pasqua D’Ambra, Mario Guarracino, Domenico Talia (eds.)

ISBN-10: 3642152902

ISBN-13: 9783642152900

This booklet constitutes the refereed complaints of the sixteenth foreign Euro-Par convention held in Ischia, Italy, in August/September 2010. The ninety revised complete papers awarded have been rigorously reviewed and chosen from 256 submissions. The papers are prepared in topical sections on help instruments and environments; functionality prediction and review; scheduling and load-balancing; excessive functionality architectures and compilers; parallel and allotted information administration; grid, cluster and cloud computing; peer to see computing; dispensed structures and algorithms; parallel and allotted programming; parallel numerical algorithms; multicore and manycore programming; conception and algorithms for parallel computation; excessive functionality networks; and cellular and ubiquitous computing.

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Additional resources for Euro-Par 2010 - Parallel Processing: 16th International Euro-Par Conference, Ischia, Italy, August 31 - September 3, 2010, Proceedings, Part II

Example text

However, two nontrivial tasks still remain unresolved when we need nested data structures: The first is composing skeletons to generate and consume them; and the second is applying optimization theorems to obtain efficient parallel programs. In this paper, we propose a novel library called Generators of Generators (GoG) library. It provides a set of primitives, GoGs, to produce nested data structures. A program developed with these GoGs is automatically optimized by the optimization mechanism in the library, so that its asymptotic complexity can be improved.

In all of them, skeletons are provided to the programmer as a Java API. Our previous work has provided formalisms for algorithmic skeletons such as a type system for nestable parallelism patterns [6] and reduction semantics [16]. This work extends both previous formalisms. QUAFF [10] is a recent skeleton library written in C++ and MPI. QUAFF relies on template-based meta-programming techniques to reduce runtime overheads and perform skeleton expansions and optimizations at compilation time. Skeletons can be nested and sequential functions are stateful.

First, depending on a boolean condition on the received data (given by the muscle function fb ), a pre-treatment fpre might be realized (or nothing if the condition is not verified, fid is the identity muscle function); then, the main treatment, expressed by the function ft is performed. The instruction corresponding to the preceding skeleton is the following: pipeI (ifI (fb , seqI (fpre ) ↑ hp (τp ), seqI (fid ) ↑ h∅ (τ1 )) ↑ h∅ (τi ), seqI (ft ) ↑ h∅ (τt )) ↑ h(τ ) pipeI (ifI (fb , seqI (fpre ) ↑ hp (τp ), seqI (fid ) ↑ ∅(τ1 )) ↑ ∅(τi ), seqI (ft ) ↑ ∅(τt )) ↑ h(τ )([d1 ]) ⇒∗ pipeI (ifI (fb , seqI (fpre ) ↑ hp (τp ), seqI (fid ) ↑ ∅(τ1 )) ↑ ∅(τi ), seqI (ft ) ↑ ∅(τt ))(d1 ) ↑ h(τ, d1 )) remember ⇒∗ ifI (fb , seqI (fpre ) ↑ hp (τp ), seqI (fid ) ↑ ∅(τ1 )) ↑ ∅(τi )(d1 ) · pipeI (seqI (ft ) ↑ ∅(τt )) ↑ h(τ, d1 ) pipe-reduction-n ⇒∗ ifI (fb , seqI (fpre ) ↑ hp (τp ), seqI (fid ) ↑ ∅(τ1 ))(d1 ) ↑ ∅(τi , d1 ) · pipeI (seqI (ft ) ↑ ∅(τt )) ↑ h(τ, d1 ) remember ⇒∗ seqI (fb )(d1 ) · choiceI (d1 , seqI (fpre ) ↑ hp (τp ), seqI (fid ) ↑ ∅(τ1 )) ↑ ∅(τi , d1 ) · pipeI (seqI (ft ) ↑ ∅(τt )) ↑ h(τ, d1 )) if-inst ⇒∗ true · choiceI (d1 , seqI (fpre ) ↑ hp (τp ), seqI (fid ) ↑ ∅(τ1 )) ↑ ∅(τi , d1 ) · pipeI (seqI (ft ) ↑ ∅(τt )) ↑ h(τ, d1 ) seq ⇒∗ seqI (fpre ) ↑ hp (τp )(d1 ) ↑ ∅(τi , d1 ) · pipeI (seqI (ft ) ↑ ∅(τt )) ↑ h(τ, d1 ) choice ⇒∗ e ↑ hp (τp , d1 ) ↑ ∅(τi , d1 ) · pipeI (seqI (ft ) ↑ ∅(τt )) ↑ h(τ, d1 ) remember+seq ⇒∗ τi ⊕ τp ⊕ e · pipeI (seqI (ft ) ↑ ∅(τt )) ↑ h(τ, d1 )) raise+finished-ok ⇒∗ τi ⊕ τp ⊕ e ↑ h(τ, d1 ) next+pipe ⇒∗ h(d1 , τi ⊕ τp ⊕ e) catch+seq-insts Fig.

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Euro-Par 2010 - Parallel Processing: 16th International Euro-Par Conference, Ischia, Italy, August 31 - September 3, 2010, Proceedings, Part II by Thilo Kielmann, Andrea Clematis, Sergei Gorlatch, Alexey Lastovetsky (auth.), Pasqua D’Ambra, Mario Guarracino, Domenico Talia (eds.)


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