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TLB reach

How much memory the TLB's remembered translations cover at once: number of entries times page size.

TLB reach = entries × page size; a working set larger than the reach incurs TLB misses even if it fits in the caches, which is why huge pages help large working sets.

Examples

  • 64 entries × 4 KiB pages reach 256 KiB; with 2 MiB pages, the same 64 entries reach 128 MiB.

See also

huge page translation lookaside buffer TLB miss page size
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