Minimizing deviation from average latency of table lookups
US11924102B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2022 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Sep 6, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/9014
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A computer-implemented method, network switch and computer program product for performing exact match lookup operations in a table. A hash of the lookup key is performed to generate a value which is used to identify a location in the hash memory space. The generated value is separated into a bucket row, a bucket column, a bucket plane and a secondary hash value, where the bucket row, bucket column and bucket plane are used to identify an originating home hash root bucket. The head entry on the collision chain of a hash root bucket identified via the secondary hash value that is a neighbor to the home hash root bucket is read to determine if an exact match of the lookup key exists. If the head entry exactly matches the lookup key, then a finding of an exact match of the lookup key is reported.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.