799 research outputs found

    Towards an Achievable Performance for the Loop Nests

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    Numerous code optimization techniques, including loop nest optimizations, have been developed over the last four decades. Loop optimization techniques transform loop nests to improve the performance of the code on a target architecture, including exposing parallelism. Finding and evaluating an optimal, semantic-preserving sequence of transformations is a complex problem. The sequence is guided using heuristics and/or analytical models and there is no way of knowing how close it gets to optimal performance or if there is any headroom for improvement. This paper makes two contributions. First, it uses a comparative analysis of loop optimizations/transformations across multiple compilers to determine how much headroom may exist for each compiler. And second, it presents an approach to characterize the loop nests based on their hardware performance counter values and a Machine Learning approach that predicts which compiler will generate the fastest code for a loop nest. The prediction is made for both auto-vectorized, serial compilation and for auto-parallelization. The results show that the headroom for state-of-the-art compilers ranges from 1.10x to 1.42x for the serial code and from 1.30x to 1.71x for the auto-parallelized code. These results are based on the Machine Learning predictions.Comment: Accepted at the 31st International Workshop on Languages and Compilers for Parallel Computing (LCPC 2018

    PROBIO II: Projeto Nacional de A√ß√Ķes Integradas P√ļblico-Privadas para a Biodiversidade.

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    bitstream/item/174732/1/doc357-2017-probioII-28mar2018.pdf(Embrapa Recursos Genéticos e Biotecnologia. Documentos, 357

    Desenvolvimento de novas linhagens de mamoeiro com auxílio de marcadores microssatélites.

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    O mamoeiro apresenta sistema reprodutivo bastante diversificado, podendo haver gen√≥tipos di√≥icos com reprodu√ß√£o por alogamia e gen√≥tipos gin√≥ico-andromon√≥icos com autogamia facultativa. Este √ļltimo tipo √© o que predomina nos cultivos comerciais em fun√ß√£o da prefer√™ncia do mercado consumidor por frutos oriundos de plantas hermafroditas. Portanto, as a√ß√Ķes de melhoramento visando o desenvolvimento de novas variedades s√£o realizadas em popula√ß√Ķes gin√≥ico-andromon√≥icas.PDF. T26

    Automated quantum operations in photonic qutrits

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    CNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENT√ćFICO E TECNOL√ďGICOCAPES - COORDENA√á√ÉO DE APERFEI√áOAMENTO DE PESSOAL E N√ćVEL SUPERIORFAPESP - FUNDA√á√ÉO DE AMPARO √Ä PESQUISA DO ESTADO DE S√ÉO PAULOFAPEMIG - FUNDA√á√ÉO DE AMPARO √Ä PESQUISA DO ESTADO DE MINAS GERAISWe report an experimental implementation of automated state transformations on spatial photonic qutrits following the theoretical proposal made by Baldijao et al. [Phys. Rev. A 96, 032329 (2017)]. A qutrit state is simulated by using three Gaussian beams, and after some state operations, the transformed state is available in the end in terms of the basis state. The state transformation setup uses a spatial light modulator and a calcite-based interferometer. The results reveal the usefulness of the operation method. The experimental data show a good agreement with theoretical predictions, opening possibilities for explorations in higher dimensions and in a wide range of applications. This is a necessary step in qualifying spatial photonic qudits as a competitive setup for experimental research in the implementation of quantum algorithms which demand a large number of steps.97216CNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENT√ćFICO E TECNOL√ďGICOCAPES - COORDENA√á√ÉO DE APERFEI√áOAMENTO DE PESSOAL E N√ćVEL SUPERIORFAPESP - FUNDA√á√ÉO DE AMPARO √Ä PESQUISA DO ESTADO DE S√ÉO PAULOFAPEMIG - FUNDA√á√ÉO DE AMPARO √Ä PESQUISA DO ESTADO DE MINAS GERAISCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENT√ćFICO E TECNOL√ďGICOCAPES - COORDENA√á√ÉO DE APERFEI√áOAMENTO DE PESSOAL E N√ćVEL SUPERIORFAPESP - FUNDA√á√ÉO DE AMPARO √Ä PESQUISA DO ESTADO DE S√ÉO PAULOFAPEMIG - FUNDA√á√ÉO DE AMPARO √Ä PESQUISA DO ESTADO DE MINAS GERAISSem informa√ß√£oSem informa√ß√£o2014/27223-22016/24162-8Sem informa√ß√£
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