Parallel processing

Parallel processing is a term used to denote a large class of techniques that are used to provide simultaneous data processing tasks for the purpose of increasing the computational speed of a computer system.Instead of processing each instruction sequentially as in a conventional computer , a parallel processing system is able to perform concurrent data processing to achieve faster execution time.for example while an instruction is being executed in the alu the next instruction can be read from memory . The system may have two or more alu 's and be able to execute two or more instructions at the same time.furthermore the system may have two or more processors operating concurrently.The purpose of parallel processing is to speed up the computer processing capability & increase its throughput,that is the amount of processing that can be accomplished during a given interval of time .The amount of hardware increases with parallel processing and with it the cost of the system increases.