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oai:uvadoc.uva.es:10324/705172025-02-20T10:20:47Zcom_10324_1165com_10324_931com_10324_894col_10324_1337

A New GCC Plugin-Based Compiler Pass to Add Support for Thread-Level Speculation into OpenMP Euro-Par 2014 Aldea López, Sergio Estébanez, Álvaro Llanos Ferraris, Diego Rafael González Escribano, Arturo Informática Thread-Level Speculation TLS OpenMP Source code generation GCC plugin 1203 Ciencia de Los Ordenadores 3304 Tecnología de Los Ordenadores Producción Científica In this paper we propose a compile-time system that adds support for Thread-Level Speculation (TLS) into OpenMP. Our solution augments the original user code with calls to a TLS library that handles the speculative parallel execution of a given loop, with the help of a new OpenMP speculative clause for variable usage classification. To support it, we have developed a plugin-based compiler pass for GCC that augments the code of the loop. With this approach, we only need one additional code line to speculatively parallelize the code, compared with the tens or hundreds of changes needed (depending on the number of accesses to speculative variables) to manually apply the required transformations. Moreover, the plugin leads to a faster performance than the manual parallelization. This research is partly supported by the Castilla-Leon Regional Government (VA172A12-2, PIRTU); Ministerio de Industria, Spain (CENIT OCEANLIDER); MICINN (Spain) and the European Union FEDER (MOGECOPP project TIN2011-25639, CAPAP-H3 network TIN2010-12011-E, CAPAP-H4 network TIN2011-15734-E). 2024-10-08T07:14:03Z 2024-10-08T07:14:03Z 2014 info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/publishedVersion European Conference on Parallel Processing, Euro-Par 2014, 25-29 August, Porto, Portugal. 978-3-319-09873-9 https://uvadoc.uva.es/handle/10324/70517 10.1007/978-3-319-09873-9_20 eng https://link.springer.com/chapter/10.1007/978-3-319-09873-9_20 info:eu-repo/semantics/openAccess 12 p application/pdf Springer https://uvadoc.uva.es/bitstream/10324/70517/3/978-3-319-09873-9_20.pdf.jpg Hispana TEXT http://rightsstatements.org/vocab/CNE/1.0/ UVaDOC. Repositorio Documental de la Universidad de Valladolid https://uvadoc.uva.es/handle/10324/70517