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Arbiter, crossbar, request selection method and information processing device

  • US 7,830,902 B2
  • Filed: 04/26/2007
  • Issued: 11/09/2010
  • Est. Priority Date: 08/18/2006
  • Status: Expired due to Fees
First Claim
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1. An arbiter mounted on a crossbar in which a plurality of units capable of issuing a request are connected, for selecting a request among requests issued by the units each of which belongs to one of a plurality of groups of units, the arbiter comprising:

  • a plurality of first request selection parts, each of the first request selection parts corresponds to one of a different groups of units, and that selects a request among requests issued by the units belong to the same group of units corresponds to the first request selection part, respectively;

    second request selection part for selecting a request among the requests selected for each of the groups of units by the first request selection parts; and

    selection control part for enabling the second request selection part to select a request among requests issued from the groups of units according to a predetermined priority of each group of units among the plurality of groups;

    whereinthe priority of each group of units among the groups is changed at prescribed time intervals.

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