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translation lookaside buffer

A small, very fast cache inside the processor that remembers recent address translations, so most accesses never need to read the page table.

The translation lookaside buffer caches recent virtual-page-to-frame translations with their permissions (split L1 instruction and data TLBs, a larger L2 TLB); a hit translates in parallel with the L1 cache lookup.

See also

page table TLB miss TLB reach huge page
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