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Unformatted text preview: Chamberlain 54 Abstract Machine Models Abstract Machine Models Abstract Machine Model: A simplified representaIon of the target architecture that is useful for programmers to think about In sequenIal programming: the von Neumann architecture •  sequenIal processor •  flat memory •  … C serves as a good programming model for von Neumann •  arguably the reason that it serves as a portable assembly language of sorts CSEP 524: Parallel ComputaIon Winter 2013: Chamberlain 56 Recall Parallel Random-Access Machine PRAM has any number of processors n༆  Every proc references any memory in “time 1” n༆  Memory read/write collisions must be resolved P0 P1 P2 P3 P4 P5 P6 P7 PRAM Memory C A B SMPs implement PRAMs for small P … not scalable Source: Larry Snyder, CSEP524, UW 57 PRAM Often Proposed As A Candidate o༆  PRAM (Paral...
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