Communication complexity of PRAMs
نویسندگان
چکیده
منابع مشابه
Communication Complexity of PRAMs
We propose a model. LPRAM. for parallel random access machines uith local memon, that captures bcth the communication and computational requirements in parallel computation. For this model. n? present se\cral interesting resuk including the following: Two n x n matkez can be multiplied in Of n’/p) computation time and O( n“/p’ ‘) communication steps using p processors (for p = Ot n ‘/log’ ’ n) ...
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This paper presents algorithms and lower bounds for several fundamental problems on the Exclusive Read, Concurrent Write Parallel Random Access Machine (ERCW PRAM) and some results for unbounded fan-in, bounded fan-out (or `BFO') circuits. Our results for these two models are of importance because of the close relationship of the ERCW model to the OCPC model, a model of parallel computing based...
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Determining time necessary for computing important functions on parallel machines is one of the most important problems in complexity theory for parallel algorithms. Recently, a substantial progress has been made in this area. In this survey paper, we discuss the results that have been obtained for three types of parallel random access machines (PRAMs): CREW, ROBUST and EREW.
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15 صفحه اولAsynchronous PRAMs Are (Almost) as Good as Synchronous PRAMs
We introduce a PRAM model which allows processors to have arbitrary asynchronous behavior. Our main result shows that any n-processor CRCW PRAM program can be simulated on an asynchronous CRCW PRAM using O(n) expected work per parallel step, and using up to lo ,yor , asynchronous processors. We achieve this result despite the fact that our work measure counts all instructions, including busy wa...
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ژورنال
عنوان ژورنال: Theoretical Computer Science
سال: 1990
ISSN: 0304-3975
DOI: 10.1016/0304-3975(90)90188-n