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Parallel construction of Euler cycles. 5. Sorting algorithms. Mesh ... You need to be able to construct sorting networks. 6. Parallel Virtual Machine (PVM) ...
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Simulating a CRCW algorithm with an EREW algorithm Lecture 4 Efficient Parallel Algorithms COMP308 CRCW algorithms can solve some problems quickly than can EREW ...
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PRAM model Lecture 3 Efficient Parallel Algorithms COMP308 PRAM PRAM - Parallel Random Access Machine Shared-memory multiprocessor unlimited number of processors ...
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Any nontrivial problem has no NC-algorithm on the mesh, since the diameter is too large. ... For example we cannot compute on a mesh minimum of n numbers in ...
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A model of computing which abstracts from the functioning and structure of ... division/dissolution/moving)It generalizes (includes) L systems and DNA computing ...
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Title: Simulating a CRCW algorithm with an EREW algorithm Author: Igor Potapov Last modified by: Igor Potapov Created Date: 2/12/2004 9:55:36 PM Document presentation ...
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The first merges the sequence on lines a1, a3,..,an-1 with sequences on lines ... In odd-even merging we send odd sequence to one merger and the even sequence ...
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Optimal PRAM algorithms: Efficiency of concurrent writing Computer science is no more about computers than astronomy is about telescopes. Edsger Dijkstra
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... ring Broadcast on mesh Broadcast on tree Broadcast on hypercube Gossiping problem Gossiping on ring Gossiping on mesh Gossiping on hypercube Overview ...
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to make it easy to reason about algorithms. to achieve ... computation and write another ... Algorithm's designers can forget the communication problems ...
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CREW, CRCW. Constant time. access to the memory. standard multiplication/addition. Communication ... j. 1. n. M[1..n] ... if C[i] =1 and C[j]=1 then C[j]:=0 ...
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COMP 308 Parallel Efficient Algorithms Lecturer: Dr. Igor Potapov Chadwick Building, room 2.09 E-mail: igor@csc.liv.ac.uk COMP 308 web-page: http://www.csc.liv.ac.uk ...
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Primary consideration: elapsed time. NOT: throughput, sharing resources, etc. ... Elapsed Time = computation time communication time synchronization time. Slide 12 ...
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Now we provide a theoretical bound on the power of a CRCW PRAM over an EREW PRAM ... of the 'right' parallel model is not going to be easily settled in favour of any ...
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... is r words per second, then each word takes time tw=1/r to traverse the link. ... forward' routing, when a message is traversing a path with multiple links, each ...
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Ashton Building, room 3.15. E-mail: igor@csc.liv.ac.uk. COMP 308 web-page: ... von Neumann model. Multiple processors: Flynn's taxonomy. Slide 25. MISD. SISD ...
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If you attempt to answer more questions than the required number of questions, ... Batcher's merging network. 6. Parallel Virtual Machine (PVM) ...
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