PPT-PRAM Algorithms

Sathish Vadhiyar PRAM Model Introduction Parallel Random Access Machine Allows parallelalgorithm designers to treat processing power as unlimited Ignores complexity of interprocess communication. Sathish. . Vadhiyar. PRAM Model - Introduction. Parallel Random Access Machine. Allows parallel-algorithm designers to treat processing power as unlimited. Ignores complexity of inter-process communication. B. Gibbons Computer Science Division University of California Berkeley, CA 94720 paper introduces the Asynchronous PRAM model of computation, a variant of the PRAM in which the processors run asy ~ch 1. Graph Algorithms. Many problems are naturally represented as graphs. Networks, Maps, Possible paths, Resource Flow, etc.. Ch. 3 focuses on algorithms to find connectivity in graphs. Ch. 4 focuses on algorithms to find paths within graphs. vs. Sequential Algorithms. Design of efficient algorithms. A parallel computer is of little use unless efficient parallel algorithms are available.. The issue in designing parallel algorithms are very different from those in designing their sequential counterparts.. George Caragea, and Uzi Vishkin. University of Maryland. 1. Speaker. James Edwards. It has proven to be quite . difficult. to obtain significant performance improvements using current parallel computing platforms.. Too Easy? or Too difficult?. Uzi Vishkin. . Using Simple Abstraction to Reinvent Computing for Parallelism, CACM, January 2011, pp. 75-85. . http://www.umiacs.umd.edu/users/vishkin/XMT/. Commodity computer systems. Time for Hardware Upgrade. Uzi Vishkin. . . The pompous version. After 40 years of “wandering in the desert”, general-purpose parallelism is very close to capturing the “promised land” of mainstream computing. Reinvention of Computing for Parallelism. Uzi Vishkin. . Same title, . http://www.umiacs.umd.edu/users/vishkin/XMT/. cacm2010.pdf. , to appear in CACM. Conclusion of Intro Slide(s). Productivity: code development time + runtime . matter and can matter more: . Big . lead of PRAM algorithms on prototype-HW. Uzi Vishkin. There is nothing more practical than a good theory. -- James C. Maxwell. Mainstream many-cores are in trouble. Computing. Jie Liu. , . Ph.D.. Professor. Computer Science Division. Western Oregon University. Monmouth, Oregon, USA. liuj@wou.edu. outline. The . fastest computers. The PRAM model. The O(1) algorithm that finds the max. 2. 　. Turing machine. 　. RAM (. Figure . ). 　. Logic circuit model. . RAM . (Random Access Machine). Operations . supposed to be executed in one unit time. (1). 　. Control operations such as. Problem - a well defined task.. Sort a list of numbers.. Find a particular item in a list.. Find a winning chess move.. Algorithms. A series of precise steps, known to stop eventually, that solve a problem.. 10 Bat Algorithms Xin-She Yang, Nature-Inspired Optimization Algorithms, Elsevier, 2014 The bat algorithm (BA) is a bio-inspired algorithm developed by Xin-She Yang in 2010. 10.1 Echolocation of Bats Contrt NoGREEMET ismaded into thiso 20NTYOS AES fter Counfter 1 Nu whiis at lst 200 miles outsthephicl bouies ofos Ales CCompltion ofthe povisions of this Ament nt of the rlocion incntiveshall be ont