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oai:riuma.uma.es:10630/98892026-02-03T12:03:10Zcom_10630_2254col_10630_37959

00925njm 22002777a 4500 dc Pedrero-Luque, Manuel author Gutiérrez-Carrasco, Eladio Damián author Romero-Montiel, Sergio author Plata-González, Óscar Guillermo author 2015-06-11 Transactional memory (TM) offers optimistic concurrency support in modern multicore archi- tectures, helping the programmers to extract parallelism in irregular applications when data dependence information is not available before runtime. In fact, recent research focus on ex- ploiting thread-level parallelism using TM approaches. However, the proposed techniques are of general use, valid for any type of application. This work presents ReduxSTM, a software TM system specially designed to extract maxi- mum parallelism from irregular applications. Commit management and conflict detection are tailored to take advantage of both, sequential transaction ordering to assure correct results, and privatization of reduction patterns, a very frequent memory access pattern in irregular applications. Both techniques are used to avoid unnecessary transaction aborts. A function in 300.twolf package from SPEC CPU2000 was taken as a motivating irregular program. This code was parallelized using ReduxSTM and an ordered version of TinySTM, a state-of-the-art TM system. Experimental evaluation shows that ReduxTM exploits more parallelism from the sequential program and obtains better performance than the other system. http://hdl.handle.net/10630/9889 Arquitectura de ordenadores Improving Transactional Memory Performance for Irregular Applications