Algorithms and Parallel Computing

Description

An algorithm is a step-by-step sequence that takes inputs, processes them, and produces outputs. In contrast, a parallel algorithm executes multiple instructions simultaneously across different processing units, combining their outputs to generate a final result. This parallelism significantly reduces computational time and can be implemented on parallel computers with multiple processors. Effective parallel programming requires support from specialized programming languages, compilers, and operating systems capable of multitasking. While parallel algorithms often involve concurrency—where multiple tasks are managed concurrently—they are distinct concepts. Sequential algorithms, by contrast, process tasks one after another without parallel execution. This book explores techniques for programming parallel computers, emphasizing the need to manage communication and data dependencies within algorithms or applications.