Adaptive extension of leases for entries in a translation lookaside buffer
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United States of America Patent
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Apr 16, 2019
Grant Date -
Sep 28, 2017
app pub date -
Nov 25, 2016
filing date -
Mar 25, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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