Counter-based entry invalidation for metadata previous write queue
AssigneeInternational Business Machines Corporation
InventorsJames J. Bonanno, Brian R. Prasky
Life of this patent
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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.
Claims8
A computer system for counter-based entry invalidation for a metadata previous write queue (PWQ), the system comprising:
- a processor;
- a pipeline associated with the processor;
- and
- a metadata PWQ, the system configured to perform a method comprising:
- writing, by the processor, an address into an entry in the metadata PWQ, the address being associated with an instance of metadata received from a pipeline;
- setting a valid tag associated with the entry in the metadata PWQ to valid;
- initializing a counter to zero;
- incrementing the counter based on receiving a count signal from the pipeline until the counter is equal to a threshold;
- and
- setting the valid tag to invalid based on the counter being equal to the threshold.
Dependencies are inferred from the claim text.