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Methods and apparatus for distributing entries among lookup units and selectively enabling less than all of the lookup units when performing a lookup operation
Methods and apparatus for distributing entries among lookup units and selectively enabling less than all of the lookup units when performing a lookup operation
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机译：用于在查找单元之间分配条目并在执行查找操作时有选择地启用少于所有查找单元的方法和装置
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摘要
Methods and apparatus are disclosed for distributing entries among lookup units and selectively enabling less than all of the lookup units when performing a lookup operation. Each of the lookup units is assigned a subset of the possible values of the entries and is programmed with the corresponding entries. In performing a lookup operation on a lookup word, only the lookup units possibly containing a matching entry are enabled which saves power and dissipates less heat. A lookup operation is then performed in the enabled lookup units to generate the lookup result. A lookup unit may correspond to an associative memory device, an associative memory bank, sets of entries within one or more associative memory devices or banks, a lookup control and a memory device, and/or any other lookup mechanism. In one implementation, the partitioning of elements is based on a Patricia tree representation of the possible entries.
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