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The recodinghas presented a barrier so great that many users have yetto experience the benefits of highly parallel computing.
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However, in all cases, previous shared memory applicationshave had to be rewritten from scratch to fullyexploit the highly parallel architecture. Today, the MPP tradition ofever-increasing performance gains continues by way ofsuch new MPP machines as the Silicon Graphics/CrayResearch T3E and the IBM SP series, now availablefrom other centers in the NSF program. Attesting to thevalue of this transition, the number of NCSA projectsusing more than 1,000 processor hours per year (in CrayX-MP units) increased from 10 to 100 after the CM-5became generally accessible. The greatest gain in computing performancesince 1989 has been through themove to large-scale parallelism-enabledat NCSA by a Thinking Machines CM-2added in 1989 and a 512-processor paralleldistributed memory CM-5 in 1992. Access initially meant classic shared memoryparallel vector processor (PVP) computers, followed in 1989 by thefirst distributed massively parallel processing (MPP) machines.Access motivated the user community to an exponential increase inhigh-performance use that has continued to this day (see Figure 1). computational science and engineeringcommunity. Since its beginning in 1985, the National Science Foundation'sSupercomputer Centers Program has provided access to high-performancecomputing to the U.S.
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How to get there? Through a scalable software environmentcoupling the small parallelism (a few processors) of the desktop to the large-scaleparallelism (thousands of processors) in Alliance machines. (Courtesy Margaret Watson andEric Butkus, EVL, University of Illinois at Chicago.)
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Based on a CAVE virtual realityexperience, the liquid architecture was created usingwater reflections captured on video and texture-mappedon a virtual cathedral. A Nationwide Parallel Computing Environmentįrom: Communications of the ACM, November 1997īy Ken Kennedy, Charles F.