Predictive prefaulting in the page fault handler
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United States of America Patent
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Issued Date -
Mar 8, 2007
app pub date -
Sep 2, 2005
filing date -
Sep 2, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A predictive prefaulting method reduces the number of page faults and accelerates the process of mapping virtual memory to physical memory. A single page fault results in the mapping of one virtual memory page or, where a contiguous block of virtual memory is linearly accessed, it may result in the mapping of two, four, or eight virtual memory pages. In this latter case, a single mapping occurs in response to the initial page fault, but afterwards, multiple mappings (2, 4, 8, or more) occur in response to each of the subsequent page faults. The number of mappings doubles until a preset limit is reached.
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