Resumo -Identificar as oportunidades de paralelismo em software é uma tarefa que consome muito tempo humano, mas uma vez que sejam reconhecidos os padrões de código que caracterizam o paralelismo, um computador poderia realizar rapidamente essa tarefa. Assim, a automatização deste processo traz diversos benefícios, como a economia de tempo e a diminuição de erros causados pelo programador [1]. Este trabalho tem como objetivo o desenvolvimento de um ambiente de software que identifica oportunidades de paralelismo em um códigofonte escrito em linguagem C, e gera um programa com o mesmo comportamento, porém com maior nível de paralelismo, e compatível com um processador gráfico que apresente arquitetura CUDA.
Palavras Chave: CUDA, GPU, paralelização de laçosAbstract -Identify opportunities for software parallelism is a task that takes a lot of human time, but once some code patterns for parallelism are identified, a software could quickly accomplish this task. Thus, automating this process brings many benefits such as saving time and reducing errors caused by the programmer [1]. This work aims at developing a software environment that identifies opportunities for parallelism in a source code written in C language, and generates a program with the same behavior, but with higher degree of parallelism, compatible with a graphics processor compatible with CUDA architecture.
The goals of a Distributed File Systems (DFS) may vary broadly. It is impossible to design a DFS attaining every desirable characteristic, such as, transparency, performance, privacy, reliability, and availability, for example. In this paper we describe the improvements achieved with the availability and performance offered by a DFS named FlexA (Flexible and Adaptable Distributed File System), which already proposed an architecture that could provide data security and flexibility. Modifications included a new approach to provide file replication and procedures to prevent system overloads. Details about the modifications introduced to FlexA, as well as results achieved with them, are provided. These results indicate that FlexA can be an important option among the known DFS.
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