Data Storage Structure Parallel Prioritization Circuitry
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Solution Overview
Problem
Existing data processing systems face latency issues when selecting a data item from a data storage structure, particularly when multiple hitting data items are identified, as the prioritization process depends on the outcome of a tag match, leading to increased processing time.
Innovation Solution
The proposed solution involves a data processing apparatus with a data storage structure that tags data items with respective tag values and assigns a tag group identifier to each data item to identify others with the same tag value. The apparatus includes tag match circuitry, prioritization circuitry, and data item selection circuitry, where prioritization is performed independently of the tag match, allowing for the selection of candidate data items before the identification of hitting data items is available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If prioritization is performed after tag match identification, then accurate selection among hitting data items is achieved, but processing latency increases
Solution Approach 1:
The patent applies preliminary action by performing prioritization on data items before the tag match operation completes. The prioritization circuitry selects candidate data items based on ordering criteria (such as least recently used) independently and in parallel with the tag match circuitry, so that when the tag match result becomes available, the prioritization is already done, reducing overall latency.
Solution Approach 2:
The patent segments the data selection process into independent parallel operations: tag match circuitry identifies hitting data items based on tag comparison, while prioritization circuitry separately selects candidate data items based on ordering criteria. These segmented operations occur in parallel rather than sequentially, reducing total processing time while maintaining accuracy through the final selection circuitry that combines both results.
2Productivity
If prioritization is performed independently before tag match, then processing speed increases, but selection accuracy may be compromised
Solution Approach 1:
The patent uses an intermediary selection circuitry that acts as a mediator between the independent prioritization operation and the tag match operation. This intermediary combines the results from both parallel operations, ensuring that the final selected data item satisfies both the prioritization criteria and the tag match criteria, thereby maintaining selection accuracy while achieving parallel processing speedup.
Solution Approach 2:
The prioritization circuitry performs preliminary selection of candidate data items based on ordering criteria before the tag match result is available. This preliminary action narrows down the search space, and the final selection circuitry then verifies the tag match condition on the pre-selected candidates, maintaining accuracy while improving speed.
3Adaptability or versatility
If multiple hitting data items are identified, then comprehensive search capability is achieved, but processing time increases due to sequential prioritization
Solution Approach 1:
The patent segments the handling of multiple hitting data items by separating the identification of hitting items (tag match circuitry) from the selection of the final item (prioritization circuitry). When multiple hits are identified, the prioritization circuitry independently applies ordering criteria to select among them in parallel, rather than sequentially processing each hit, thereby reducing processing time while maintaining comprehensive search capability.
Solution Approach 2:
The prioritization circuitry performs preliminary ordering and selection among potential hitting data items before the tag match operation completes. This preliminary action prepares the selection in advance, so when multiple hits are confirmed, the system can quickly determine which one to return based on pre-computed prioritization, reducing the time penalty associated with handling multiple hits.
Data Source
AI summary
An apparatus has a data storage structure to store data items tagged by respective tag values and stores, in association with each data item, a respective tag group identifier to identify other data items having a same tag value within a collection of data items. The apparatus also has tag match circuitry to identify one or more hitting data items. Prioritisation circuitry is provided to select candidate data items which, relative to any other data items in the particular collection of data items having the same tag group identifier as the selected candidate data item is favoured according to an ordering of the data items. The prioritisation circuitry selects the one or more candidate data items before the identification of the hitting data items is available from the tag match circuitry. Data item selection circuitry selects a candidate data item for which the tag match circuitry detected a match.