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:
Sep. 13, 2011
Filed:
Feb. 13, 2008
John Gregory Favor, Scotts Valley, CA (US);
Paul G. Chan, Oakland, CA (US);
Graham Ricketson Murphy, Sunnyvale, CA (US);
Joseph Byron Rowlands, Santa Clara, CA (US);
John Gregory Favor, Scotts Valley, CA (US);
Paul G. Chan, Oakland, CA (US);
Graham Ricketson Murphy, Sunnyvale, CA (US);
Joseph Byron Rowlands, Santa Clara, CA (US);
Oracle America, Inc., Redwood City, CA (US);
Abstract
An embodiment of the present invention includes a circuit for tracking memory operations with trace-based execution. Each trace includes a sequence of operations that includes zero or more of the memory operations. The memory operations being executed form a set of active memory operations that have a predefined program order among them and corresponding ordering constraints. At least some of the active memory operations access the memory in an execution order that is different from the program order. Checkpoint entries are associated with each trace. Violations of the ordering constraints may be signaled too late to prevent an update of the cached data associated with the memory operations. A sub-circuit detects this condition and invalidates the checkpoint locations indicated by the checkpoint entries associated with the trace experiencing the violation and all younger traces.