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Title:
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Hardware transactional memory with software-defined conflicts
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Author:
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Titos Gil, Rubén; Acacio, Manuel E.; García, José M.; Harris, Tim; Cristal Kestelman, Adrián; Unsal, Osman Sabri; Hur, Ibrahim; Valero Cortés, Mateo
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors; Universitat Politècnica de Catalunya. CAP - Grup de Computació d'Altes Prestacions |
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Abstract:
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In this paper we propose conflict-defined blocks, a programming language construct that allows programmers to change the concept of conflict from one transaction to another, or even throughout the course of the same transaction. Defining conflicts in software makes possible the removal of dependencies which, though not necessary for the correct execution of the transactions, arise as a result of the coarse synchronization style encouraged by TM. Programmers take advantage of their knowledge about the problem and specify through confict-defined blocks what types of dependencies are superfluous in a certain part of the transaction, in order to extract more performance out of coarse-grained transactions without having to write minimally synchronized code. Our experiments with several transactional benchmarks reveal that using software-defined conflicts, the programmer achieves significant reductions in the number of aborted transactions and improve scalability. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Informàtica::Arquitectura de computadors
-Multiprocessors
-Hardware transactional memory
-Software defined conflicts
-Transactional conflict
-Fixed definition
-Atomic language
-Coarse synchronization
-TM programming model
-Multiprocessadors |
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Rights:
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Document type:
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Article - Submitted version
Conference Object |
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