Software translation lookaside buffer for persistent pointer management
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United States of America Patent
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Feb 14, 2017
Grant Date -
May 2, 2013
app pub date -
Oct 27, 2011
filing date -
Oct 27, 2011
priority date (Note) -
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Abstract
Techniques are provided for performing OID-to-VMA translations during runtime. Vector registers are used to implement a “software TLB” to perform OID-to-VMA translations. Runtime dereferencing is performed using one or more vector registers to compare each OID that needs to be dereferenced against a set of cached OIDs. When a cached OID matches the OID being dereferenced, the VMA of the cached OID is retrieved from cache. Buffer cache items may be pinned during the period in which the software TLB stores entries for the items. The cache of OID translation information may be single or multi-leveled, and may be partially or completely stored in registers within a processor. When stored in registers, the translation information may be spilled out of the register, and reloaded into the register, as the register is needed for other purposes.
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