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Adaptive Extension of Leases for Entries in a Translation Lookaside Buffer

United States Patent Application

20170277639
A1
View the Complete Application at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
The described embodiments include a computing device with two or more translation lookaside buffers (TLB). During operation, the computing device updates an entry in the TLB based on a virtual address to physical address translation and metadata from a page table entry that were acquired during a page table walk. The computing device then computes, based on a lease length expression, a lease length for the entry in the TLB. Next, the computing device sets, for the entry in the TLB, a lease value to the lease length, wherein the lease value represents a time until a lease for the entry in the TLB expires, wherein the entry in the TLB is invalid when the associated lease has expired. The computing device then uses the lease value to control operations that are allowed to be performed using information from the entry in the TLB.
Awad, Amro (Albuquerque, NM), Blagodurov, Sergey (Seattle, WA), Basu, Arkaprava (Austin, TX), Oskin, Mark H. (Bellevue, WA), Loh, Gabriel H. (Bellevue, WA), Kegel, Andrew G. (Bellevue, WA), Christie, David S. (Austin, TX), McGrath, Kevin J. (Sunnyvale, CA)
15/ 361,335
November 25, 2016
GOVERNMENT RIGHTS [0002] This invention was made with government support under (FastForward-2 Memory Technology (MT) Project with Lawrence Livermore National Laboratory (prime contract no. DE-AC52-07NA27344, subcontract no. B608045)) awarded by the Department of Energy (DOE). The government has certain rights in this invention.