{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9720834","patent":{"patent_number":"US-9720834","title":"Power saving for reverse directory","assignee":null,"inventors":[],"filing_date":"2015-12-11T00:00:00.000Z","publication_date":"2017-08-01T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F"],"num_claims":20,"abstract":"Embodiments include systems and methods for improving power consumption characteristics of reverse directories in microprocessors. Some embodiments operate in context of multiprocessor semiconductors having cache hierarchies in which multiple higher-level caches share lower-level caches. Lower-level cache is coupled with reverse directories associated with respective ones of the higher-level caches. Each reverse directory can be segregated into two reverse sub-directories, one reverse sub-directory for relatively high-frequency accesses (e.g., updating “valid” and/or “private” information), and the other reverse sub-directories for relatively low-frequency accesses updating “index” and “way” information). During a write mode operation, when the reverse directories are updated, the write operation is performed only on the sub-directories having the entries invoked by the update, such that write operations can frequently consume only a fraction (e.g., halt) of the power of a conventional reverse directory write operation."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Power saving for reverse directory","description":"Embodiments include systems and methods for improving power consumption characteristics of reverse directories in microprocessors. Some embodiments operate in context of multiprocessor semiconductors ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9720834","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9720834","citation_suggestion":"Patentable. \"Power saving for reverse directory\" (US-9720834). https://patentable.app/patents/US-9720834","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9720834","json":"https://patentable.app/api/llm-context/US-9720834","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T14:25:05.240Z"}