User-Level VSM Optimization and its Application
نویسندگان
چکیده
This paper describes user-level optimisations for virtual shared memory (VSM) systems and demonstrates performance improvements for three scientiic kernel codes written in Fortran-S and running on a 30 node prototype distributed memory architecture. These optimisations can be applied to all consistency models and directory schemes, whether in hardware or software, which employ an invalidation based protocol. The semantics of these optimisations are carefully stated. Currently these optimisations are performed by the programmer, but there is much scope for automating this process within a compiler.
منابع مشابه
Application of Particle Swarm Optimization and Genetic Algorithm Techniques to Solve Bi-level Congestion Pricing Problems
The solutions used to solve bi-level congestion pricing problems are usually based on heuristic network optimization methods which may not be able to find the best solution for these type of problems. The application of meta-heuristic methods can be seen as viable alternative solutions but so far, it has not received enough attention by researchers in this field. Therefore, the objective of thi...
متن کاملBandwidth and Delay Optimization by Integrating of Software Trust Estimator with Multi-User Cloud Resource Competence
Trust Establishment is one of the significant resources to enhance the scalability and reliability of resources in the cloud environment. To establish a novel trust model on SaaS (Software as a Service) cloud resources and to optimize the resource utilization of multiple user requests, an integrated software trust estimator with multi-user resource competence (IST-MRC) optimization mechanism is...
متن کاملRandom Indexing and Negative User Preferences for Enhancing Content-Based Recommender Systems
The vector space model (VSM) emerged for almost three decades as one of the most effective approaches in the area of Information Retrieval (IR), thanks to its good compromise between expressivity, effectiveness and simplicity. Although Information Retrieval and Information Filtering (IF) undoubtedly represent two related research areas, the use of VSM in Information Filtering is much less analy...
متن کاملSpinning-on-Coherency: A New VSM Optimisation for Write-Invalidate
This paper introduces spinning-on-coherency (SOC) a technique for virtual shared memory (VSM) which enables latency-hiding of remote reads and the removal of related synchronisation points. Coherence-bits are hardware-tags associated with addresses which record local access permissions (such as read, write, invalid). In SOC a user-thread spins on the particular coherence-bits associated with an...
متن کاملDesign and Development of a Mobile-Based Application for Identification, Prevention, and Control of Head Lice and Survey of User Satisfaction
Introduction: Using mobile phones is one of the ways to increase peoplechr('39')s knowledge and awareness. The objective of this study was to design and develop a mobile-based application for “identification, prevention, and control of head lice” and also to assess the satisfaction of mobile users with this educational application. Method: This descriptive cross-sectional study was conducted in...
متن کامل