svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
apic(4)
APIC(4) BSD Kernel Interfaces Manual APIC(4)
NAME
apic — Advanced Programmable Interrupt Controller (APIC) driver
SYNOPSIS
This driver is a mandatory part of amd64 kernel. To compile this driver
into i386 kernel, place the following line in your kernel configuration
file:
device apic
The following tunable is settable from the loader(8):
hint.apic.X.clock
controls event timers functionality support. Setting to 0, disables it.
Default value is 1.
hint.apic.X.disabled
Set this to 1 to disable APIC support, falling back to the legacy PIC.
DESCRIPTION
There are two components in the Intel APIC system, the local APIC (LAPIC)
and the I/O APIC. There is one local APIC in each CPU in the system.
There is typically one I/O APIC for each peripheral bus in the system.
Local APICs manage all external interrupts for a specific processor. In
addition, they are able to accept and generate inter-processor interrupts
(IPIs).
I/O APICs contain a redirection table, which is used to route the inter‐
rupts they receive from peripheral buses to one or more local APICs.
Each local APIC includes one 32-bit programmable timer. This driver uses
them to supply kernel with one event timer named "LAPIC". Event timer
provided by the driver supports both one-shot an periodic modes. Because
of local APIC nature it is per-CPU. The timer frequency is not reported
by the platform and so automatically measured by the driver on the first
use. Depending on CPU model this timer may stop in C3 and deeper CPU
sleep states. Driver automatically adjusts event timer priority and
reports it to prevent entering dangerous sleep states when it is used.
SEE ALSO
atrtc(4), attimer(4), eventtimers(4), hpet(4)
BSD December 20, 2011 BSD