The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 1999
Filed:
Jun. 07, 1996
Jay Gerald Heaslip, Williston, VT (US);
Robert Dov Herzl, South Burlington, VT (US);
Arnold Steven Tran, South Burlington, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer system includes a processor and a cache and memory management unit. The processor includes a means for retiring instructions in program order. The cache and memory management unit includes means for detecting when a translation has been evicted from a lookaside buffer and means for communicating eviction information to the means for retiring instructions in program order. The means for retiring instructions in program order includes means for holding a storage related instruction which causes a miss in the lookaside buffer or in the cache in a first pass of execution until the instruction becomes the oldest storage related instruction in program sequence and further includes means responsive to the eviction information for flushing all storage related instructions except the current storage related instruction. The system avoids the occurrence of misses in the buffer late in execution (e.g., PASS 2 or later), thus avoiding a necessity for complex recovery provisions.