Problems
There are a number of known bugs in implementations of APIC systems, especially with concern to how the 8254 is connected. Defective BIOSes may not set up interrupt routing properly, or provide incorrect ACPI tables and Intel Multiprocessor Specification tables. Finally, the APIC can also be a cause of system failure when the operating system does not support it properly. On older operating systems, people often had to disable the I/O and local APICs. While this is not possible anymore due to the prevalence of Symmetric multiprocessor and multi-core systems, the bugs in the firmware and the operating systems are now a rare occurrence.
Read more about this topic: Intel APIC Architecture
Famous quotes containing the word problems:
“Our young people are diseased with the theological problems of original sin, origin of evil, predestination, and the like. These never presented a practical difficulty to any man,—never darkened across any man’s road, who did not go out of his way to seek them. These are the soul’s mumps, and measles, and whooping- coughs, and those who have not caught them cannot describe their health or prescribe a cure. A simple mind will not know these enemies.”
—Ralph Waldo Emerson (1803–1882)
“The problems of society will also be the problems of the predominant language of that society. It is the carrier of its perceptions, its attitudes, and its goals, for through it, the speakers absorb entrenched attitudes. The guilt of English then must be recognized and appreciated before its continued use can be advocated.”
—Njabulo Ndebele (b. 1948)
“All problems are finally scientific problems.”
—George Bernard Shaw (1856–1950)