Overview

Mastering GASNet: Architecting and Programming Scalable PGAS Communication presents a definitive, practical guide to GASNet-the high-performance communication library at the heart of modern Partitioned Global Address Space (PGAS) languages and parallel middleware. The book opens with a lucid introduction to the motivations, history, and foundational concepts behind GASNet, positioning it alongside other key communication systems such as MPI and OpenSHMEM. Early chapters ground readers in essential terminology and paradigms with clear examples and a guided ""Hello World"" walkthrough, making the material accessible to both newcomers and experienced parallel-systems programmers. Building on this foundation, the book offers a deep and methodical exposition of GASNet's layered architecture, covering memory segmentation, active messaging, concurrency models, and resource management. It walks readers through practical API usage-initialization, remote memory access, asynchronous operations, synchronization, and diagnostics-while also delving into advanced topics such as zero-copy RDMA, hybrid programming models, adaptive communication strategies, and managing heterogeneity across CPUs and accelerators. Each topic is illustrated with real-world examples, implementation insights, and troubleshooting guidance to help developers construct high-performance, scalable applications. The final section focuses on robustness, performance tuning, and future directions. Readers learn profiling and optimization techniques for large-scale deployments, strategies for resilience and resource management, and case studies that demonstrate practical tuning at scale. The book concludes by examining emerging trends-integrating GASNet with accelerators and persistent memory, designing autonomic communication engines, and addressing evolving security concerns-equipping engineers, researchers, and students with the knowledge to architect and program future-ready PGAS communication systems.

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