Translation Lookaside Buffers
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Most machines use special caches that contains a portion of
the entries in a page table.
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Each entry in the TLB contains a tag (portion of the virtual page number)
and most of the information in a page table entry.
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TLBs are typically cleared when a context switch is performed.
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TLBs are typically quite small to provide a very fast translation.
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There are typically separate TLBs for instructions and data.
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