Exclusivity in circuitry having a home node providing coherency control
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United States of America
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Mar 8, 2022
Grant Date -
Apr 8, 2021
app pub date -
Oct 8, 2019
filing date -
Oct 8, 2019
priority date (Note) -
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Abstract
Circuitry comprises a set of two or more data handling nodes each having respective storage circuitry to hold data; and a home node to serialise data access operations and to control coherency amongst data held by the one or more data handling nodes so that data written to a memory address is consistent with data read from that memory address in response to a subsequent access request; in which: a requesting node of the set of data handling nodes is configured to communicate a request to the home node for exclusive access to a given instance of data at a given memory address; and the home node is configured, in response to the request, to communicate information to other data handling nodes of the set of data handling nodes to control handling, by those other data handling nodes, of any further instances of the data at the given memory address which are held by those other data handling nodes.
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