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  How Helpers Hasten h-Relations

Sanders, P., & Solis-Oba, R. (2001). How Helpers Hasten h-Relations. Journal of Algorithms, 41, 86-98. Retrieved from http://www.idealibrary.com/servlet/doi/10.1006/jagm.2001.1169.

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 Urheber:
Sanders, Peter1, Autor           
Solis-Oba, Roberto1, Autor           
Affiliations:
1Algorithms and Complexity, MPI for Informatics, Max Planck Society, ou_24019              

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 Zusammenfassung: We study the problem of exchanging a set of messages among a group of processors, where messages may consist of different numbers of packets. We consider the model of half-duplex communication. Let $\Lmax$ denote the maximum number of packets that a processor must send and receive. If all the packets need to be delivered directly, at least $\frac{3}{2}\Lmax$ communication steps are needed to solve the problem in the worst case. We show that by allowing forwarding, only $\frac{6}{5}\Lmax + \Oh{1}$ time steps are needed to exchange all the messages, and this is optimal. Our work was motivated by the importance of irregular message exchanges in distributed-memory parallel computers, but it can also be viewed as an answer to an open problem on scheduling file transfers posed by Coffmann, Garey, Johnsson, and LaPaugh in 1985.

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Sprache(n): eng - English
 Datum: 2010-03-022001
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 518204
URI: http://www.idealibrary.com/servlet/doi/10.1006/jagm.2001.1169
Anderer: Local-ID: C1256428004B93B8-37B7291E274B2072C1256B4800545624-SanSol2001
 Art des Abschluß: -

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Titel: Journal of Algorithms
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 41 Artikelnummer: - Start- / Endseite: 86 - 98 Identifikator: ISSN: 0196-6774