The page attribute table (PAT) is a processor supplementary capability extension to the page table format of certain x86 and x86-64 microprocessors. Like memory type range registers (MTRRs), they allow for fine-grained control over how areas of memory are cached, and are a companion feature to the MTRRs.
Unlike MTRRs, which provide the ability to manipulate the behavior of caching for a limited number of fixed physical address ranges, Page Attribute Tables allow for such behavior to be specified on a per-page basis, greatly increasing the ability of the operating system to select the most efficient behavior for any given task.
Read more about Page Attribute Table: Processors, See Also
Famous quotes containing the words page, attribute and/or table:
“I asked myself, “Is it going to prevent me from getting out of here? Is there a risk of death attached to it? Is it permanently disabling? Is it permanently disfiguring? Lastly, is it excruciating?” If it doesn’t fit one of those five categories, then it isn’t important.”
—Rhonda Cornum, United States Army Major. As quoted in Newsweek magazine, “Perspectives” page (July 13, 1992)
“Gratitude—the meanest and most snivelling attribute in the world.”
—Dorothy Parker (1893–1967)
“I talk with the authority of failure—Ernest with the authority of success. We could never sit across the same table again.”
—F. Scott Fitzgerald (1896–1940)