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oai:uvadoc.uva.es:10324/291322025-02-20T10:20:22Zcom_10324_1165com_10324_931com_10324_894col_10324_1337
UVaDOC author Aldea López, Sergio author Llanos Ferraris, Diego Rafael author González Escribano, Arturo 2018-03-17T16:24:32Z 2018-03-17T16:24:32Z 2016 Proceedings of the 16th International Conference on Computational and Mathematical Methods in Science and Engineering, CMMSE 2016 4-8 July, 2016, Rota, Cádiz 978-84-608-6082-2 http://uvadoc.uva.es/handle/10324/29132 Transactional Memory (TM) is a technique that aims to mitigate the performance losses that are inherent to the serialization of accesses in critical sections. Some studies have shown that the use of TM may lead to performance improvements, despite the existence of management overheads. However, the relative performance of TM, with respect to classical critical sections management depends greatly on the actual percentage of times that the same data is handled simultaneously by two transactions. In this paper, we compare the relative performance of the critical sections provided by OpenMP with respect to two Software Transactional Memory (STM) implementations. These three methods are used to manage concurrent data accesses in ATLaS, a software-based, Thread-Level Speculation (TLS) system. The complexity of this application makes it extremely di cult to predict whether two transactions may conflict or not, and how many times the transactions will be executed. Our experimental results show that the STM solutions only deliver a performance comparable to OpenMP when there are almost no conflicts. In any other case, their performance losses make OpenMP the best alternative to manage critical sections. eng Attribution 4.0 International Critical Sections and Software Transactional Memory Comparison in the Context of a TLS Runtime Library info:eu-repo/semantics/conferenceObject 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URL https://uvadoc.uva.es/bitstream/10324/29132/1/STM-TLS.pdf File MD5 d8a4150736fae4d2f62a39926bdf2af9 289314 application/pdf STM-TLS.pdf