Editing Multiple buffering (section)

== Double buffering for DMA{{anchor|Double_DMA}} ==
The term '''double buffering''' is used for copying data between two buffers for [[direct memory access]] (DMA) transfers, not for enhancing performance, but to meet specific addressing requirements of a device (esp. 32-bit devices on systems with wider addressing provided via [[Physical Address Extension]]).<ref>{{cite web|url=http://www.microsoft.com/whdc/system/platform/server/PAE/PAEdrv.mspx#E2D|title=Physical Address Extension - PAE Memory and Windows|publisher=Microsoft Windows Hardware Development Central|year=2005|access-date=2008-04-07}}</ref> [[DOS]] and [[Windows]] [[device drivers]] are a place where the term "double buffering" is likely to be used. Linux and BSD source code calls these "bounce buffers".<ref>{{cite web|url=http://www.chudov.com/tmp/LinuxVM/html/understand/node65.html|title=Understanding The Linux Virtual Memory Manager, 10.4 Bounce Buffers|last=Gorman|first=Mel}}</ref>

Some programmers try to avoid this kind of double buffering with [[zero-copy]] techniques.