Computer Architecture and Parallel Processing
At the higher level of complexity, parallel processing can be achieved by using multiple functional units that perform many operations simultaneously. It represents the organization of a single computer containing a control unit, processor unit and a memory unit. Instructions are executed sequentially.
CS301: Computer Architecture
It can be achieved by pipelining or multiple functional units. It represents an organization that includes multiple processing units under the control of a common control unit.
All processors receive the same instruction from control unit but operate on different parts of the data. They are highly specialized computers. They are basically used for numerical problems that are expressed in the form of vector or matrix. But they are not suitable for other types of computations.
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It consists of a single computer containing multiple processors connected with multiple control units and a common memory unit. It is capable of processing several instructions over single data stream simultaneously. Note that the speedup is limited, even for large n.
Introduction to Parallel Computing - GeeksforGeeks
If n is 1, the speedup is 1. Therefore, the speed of execution of this code using 1 processor is about the same as using n processors. Apply Amdahl's law to better understand how it works by substituting a variety of numeric values into this equation and sketching the graph of the equation. In section 10 of Chapter 6, study the section titled "Amdahl's Law" up to the section titled "Complexity.
Study these slides. This reading focuses on the problem of parallel software. It discusses scaling, uses a single example to explain shared memory and message passing, and identifies problems related to cache and memory consistency.
Parallel Processing and Data Transfer Modes in a Computer System
Read section 2. The reading covers two extreme approaches to parallel programming. First, parallelism is handled by the lower software and hardware layers. OpenMP is applicable in this first case. Secondly, parallelism is handled by the programmer.
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MPI is applicable in the second case. Read Chapter 1 on pages If you go to the table of contents, selecting the section will jump you to the desired page to avoid scrolling through the text.
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Chapter 1 uses a matrix times multiplication vector example in section 1. This chapter goes on to describe parallel approaches for computing a solution: section 1. Study these sections to get an overview of the idea of software approaches to parallelism. Read Chapter 2 on pages 21 - This chapter presents issues that slow the performance of parallel programs. Read Chapter 3 on pages 31 - 66 to learn about shared memory parallelism.
Parallel programming and parallel software are extensive topics and our intent is to give you an overview of them; more in depth study is provided by the following chapters. Read Chapter 4 on pages 67 - This chapter discusses MP directives and presents a variety of examples. Read Chapter 5 on pages - By including more processing cores on chip, total processor throughput is increased through exploiting TLP and parallel computing. However, substantial challenges lay ahead on proper hardware and architecture support for the system stack and the parallel programmed ecosystem of the future.
The research group conducts research in developing hardware support to fully utilise future many-cores and to make them easier to program and debug.