Tracking cache coherency in an extended multiple processor environment
A system for tracking cache coherency in multiprocessor environment includes a first cell having a multiprocessor assembly, a memory, and a coherency director including a first intermediate home agent and a first intermediate cache agent. A second cell is similarly equipped. The two cells may share...
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creator | SCHIBINGER JOSEPH S COLLIER JOSH D CHURCH CRAIG R |
description | A system for tracking cache coherency in multiprocessor environment includes a first cell having a multiprocessor assembly, a memory, and a coherency director including a first intermediate home agent and a first intermediate cache agent. A second cell is similarly equipped. The two cells may share lines of cache in a controlled manner. Interconnection between the two cells connect the intermediate home agent of one cell to the intermediate cache agent of the second cell. Trackers are present in the agents of the first cell and the second cell. The trackers are responsible for keeping track of cache transactions between cells and queuing up requests for lines of cache so that retry attempts may be made. The trackers thus assist in transactions involving sharing lines of cache, exchanging information and resolving conflicts. |
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subjects | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS |
title | Tracking cache coherency in an extended multiple processor environment |
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