PPT-PRAM and Parallel

Computing Jie Liu PhD Professor Computer Science Division Western Oregon University Monmouth Oregon USA liujwouedu outline The fastest computers The PRAM model The O1 algorithm that finds the max. Unlike sequential algorithms parallel algorithms cannot be analyzed very well in isolation One of our primary measures of goodness of a parallel system will be its scalability Scalability is the ability of a parallel system to take advantage of incr 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. 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.. mn
CREW PRAM processors. This algorithm is analogous to and nearly optimal with respect to the sequential algorithmof Paige and Tarjan.Index TermsNTRODUCTION recent years, there has been much work i 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 . Programming & Cluster Computing. Applications and. Types of Parallelism. Joshua Alexander, U Oklahoma. Ivan . Babic. , Earlham College. Michial. Green, Contra Costa College. Mobeen. . Ludin. , Earlham College. 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. 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. 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. Dr Susan Cartwright. Dept of Physics and Astronomy. University of Sheffield. Parallel Universes. Are you unique?. Could there be another “you” differing only in what you had for breakfast this morning?. 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