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Qu'est-ce (qui) est Prepaging - définition
WIKIMEDIA DISAMBIGUATION PAGE
Prefetch; Pre-fetching; Prepaging
prepaging
<architecture> (Or "working set model") A technique whereby
the operating system in a paging virtual memory
multitasking environment loads all pages of a process's
working set into memory before the process is restarted.
Under demand paging a process accesses its working set by
page faults every time it is restarted. Under prepaging the
system remembers the pages in each process's working set and
loads them into physical memory before restarting the process.
Prepaging reduces the page fault rate of reloaded processes
and hence generally improves CPU efficiency.
["Modern Operating Systems", Andrew S. Tanenbaum,
pub. Prentice Hall, Inc. 1992 ].
(1998-04-23)
prefetch
Prefetching
Prefetching in computer science is a technique for speeding up fetch operations by beginning a fetch operation whose result is expected to be needed soon. Usually this is before it is known to be needed, so there is a risk of wasting time by prefetching data that will not be used.
Wikipédia
Prefetching
Prefetching in computer science is a technique for speeding up fetch operations by beginning a fetch operation whose result is expected to be needed soon. Usually this is before it is known to be needed, so there is a risk of wasting time by prefetching data that will not be used. The technique can be applied in several circumstances:
- Cache prefetching, a speedup technique used by computer processors where instructions or data are fetched before they are needed
- Prefetch input queue (PIQ), in computer architecture, pre-loading machine code from memory
- Link prefetching, a web mechanism for prefetching links
- Prefetcher technology in modern releases of Microsoft Windows
- Prefetch instructions, for example provided by
PREFETCH, an X86 instruction in computing
- Prefetch buffer, a feature of DDR SDRAM memory
- Swap prefetch, in computer operating systems, anticipatory paging
