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:
“The truth of the thoughts that are here set forth seems to me unassailable and definitive. I therefore believe myself to have found, on all essential points, the final solution of the problems. And if I am not mistaken in this belief, then the second thing in which the value of this work consists is that it shows how little is achieved when these problems are solved.”
—Ludwig Wittgenstein (1889–1951)
“...I have wanted to believe people could make their dreams come true ... that problems could be solved. However, this is a national illness. As Americans, we believe all problems can be solved, that all questions have answers.”
—Kristin Hunter (b. 1931)
“If combat means living in a ditch, females have biological problems staying in a ditch for 30 days because they get infections.... Males are biologically driven to go out and hunt giraffes.”
—Newt Gingrich (b. 1943)