Vector Instruction types • Vector-Vector Instructions • Vector-Scalar Instructions • Vector-Memory Instructions • Vector Reduction Instructions • Gather and Scatter Instructions • Masking Instructions SIMD organization: distributed memory model and shared memory model There are various architecture supporting parallel processing exists these are boardly classified as Multiprocessors and Multicomputers. The common classification are Shared-Memory Multiprocessors ..
Cache Coherence and Synchronization Cache coherence problem An important problem that must be addressed in many parallel systems – any system that allows multiple processors to access (potentially) multiple copies of data – is cache coherence. The existence of multiple cached copies of data creates the possibility of inconsistency between a cached copy and the ..
Functional and Logic Models Two language oriented programming models for parallel processing are described in this section. The first model is based on using functional programming languages such as pure, Lisp, SISAL, and Strand 88. The second model is based on logic programming languages such as Concurrent space Prolog and Parlog. A functional programming language ..
Message-Passing Model Two processes A and B communicate with each other by passing message through a direct network. The messages may be instructions, data, synchronization, or interrupt signals, etc. Delay caused by message passing is much longer than shared variable model in a same memory. Two message passing programming models are introduced here. Figure 5.2: ..
Subject Name: Advance Computer Architecture Subject Code: CS 6001 Subject Notes Unit-V Parallel Programming Models The model of a parallel algorithm is developed by considering a strategy for dividing the data and processing method and applying a suitable strategy to reduce interactions. Parallel programming models are specifically designed for multiprocessor, multicomputer or vector / SIMD ..