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Although software aging and rejuvenation (SAR) is a young research field, in its first 20 years a lot of knowledge has been produced. Nowadays, important scientific journals and conferences include SAR-related topics in their scope of interest. This fast growing and wide range of dissemination venues pose a challenge to researchers to keep tracking of the new findings and trends in this area. In this...
The distribution of tasks in a workflow system, in general, does not consider resource aptitude. Resources that share the same role in a workflow can have different degrees of aptitude to a task. This work proposes an extension to task distribution strategies and presents the use of this extension in the selection of resources to tasks. The experiments presented here demonstrate the effectiveness...
The accumulating effects of software aging have direct influence to the rate of aging-related failures. So far, the most investigated software aging effects are memory related, such as memory leak and memory fragmentation problems. In this work, we present a practical body of knowledge to support the solid understanding of the most important issues in monitoring memory-related software aging effects,...
The overhead caused by system calls in many applications has motivated research works focusing on reducing their execution costs. In this work we implement three types of compound system calls, which are evaluated experimentally by taking into account their execution time in systems with one up to eight cores. We also investigate the system calls running in both physical and virtual machines. All...
The performance of memory allocation operations is a very important aspect to be considered in software design, however it is frequently neglected. This paper presents a comparative analysis of seven largely adopted memory allocators. Unlike other related works, based on artificial benchmark tests, we evaluate the selected allocators using real-world middleware applications. In order to compare the...
Memory allocations are one of the most ubiquitous operations in computer programs. The performance of the routines that implement these operations is very important although it is frequently neglected. This paper presents a comparative analysis of seven largely adopted memory allocators. Unlike other related works, based on artificial benchmark tests, we evaluate the selected allocators using real-world...
Research advances in network traffic forecasting are continually emerging in the literature. Although the progress in this field, the quality control of traffic forecasts is commonly neglected in previous works. In this paper we analyze the performance of CuSum, Shewhart, and EWMA control charts applied to the residuals of forecasting models fitted to selected traffic samples obtained from real IP...
The high use of system calls in many applications has motivated research works focusing on reducing the overhead caused by these calls. In this work we implement three types of compound system calls, which are evaluated experimentally by taking into account their execution time in systems with 1 to 8 cores. We also investigate the system calls running in both physical and virtual machines. All proposed...
Memory allocations are one of the most omnipresent operations in computer programs. The performance of memory allocation operations is a very important aspect to be considered in software design, however it is frequently neglected. This paper presents an experimental comparative study of seven largely adopted memory allocators. Unlike other related works, we assess the selected memory allocators using...
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