- Patent Title: Counter-based entry invalidation for metadata previous write queue
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Application No.: US14101437Application Date: 2013-12-10
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Publication No.: US08914593B2Publication Date: 2014-12-16
- Inventor: James J. Bonanno , Brian R. Prasky
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Cantor Colburn LLP
- Agent Margaret McNamara
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F12/08 ; G06F12/12 ; G06F11/07

Abstract:
Embodiments of the invention relate to counter-based entry invalidation for a metadata previous write queue (PWQ). An aspect of the invention includes writing an address into an entry in the metadata PWQ, the address being associated with an instance of metadata received from a pipeline and setting a valid tag associated with the entry in the metadata PWQ to valid. Another aspect of the invention includes initializing a counter to zero and incrementing the counter based on receiving a count signal from the pipeline until the counter is equal to a threshold. Yet another aspect of the invention includes setting the valid tag to invalid based on the counter being equal to the threshold.
Public/Granted literature
- US20140101396A1 COUNTER-BASED ENTRY INVALIDATION FOR METADATA PREVIOUS WRITE QUEUE Public/Granted day:2014-04-10
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