Reducing snoop response time for snoopers without copies of requested data via snoop filtering

In a system having a plurality of snooping masters coupled to a Bus Macro, a snoop filtering device and method are provided in at least one of the plurality of snooping masters. The snoop filtering device and method parse a snoop request issued by one of the plurality of snooping masters and return...

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Bibliographische Detailangaben
Hauptverfasser: Dieffenderfer, James N, Drerup, Bernard C, Ganasan, Jaya P, Hofmann, Richard G, Sartorius, Thomas A, Speier, Thomas P, Wolford, Barry J
Format: Patent
Sprache:eng
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Zusammenfassung:In a system having a plurality of snooping masters coupled to a Bus Macro, a snoop filtering device and method are provided in at least one of the plurality of snooping masters. The snoop filtering device and method parse a snoop request issued by one of the plurality of snooping masters and return an Immediate Response if parsing indicates the requested data cannot possibly be contained in a responding snooping master. If parsing indicates otherwise the at least one plurality of snoop masters searches its resources and returns the requested data if marked updated.