apic cpim

hardware and directly sent to the interrupt controller, such as 8259A). Then, the interrupt controller sends a signal to the CPU, after the CPU detects the signal, it interrupts the current work and then processes the interruption. Then, the processor will notify the operating system that an interruption has occurred, so that the operating system will handle the interruption as appropriate. Now let's take a look at the interrupt controller. There are two common interrupt controllers: Programmab

hardware and sent directly to the interrupt controller (such as 8259A) and then signaled to the CPU by the interrupt controller, and the CPU detects the signal and interrupts the current work in turn to handle the interrupt. The processor then notifies the operating system that an interrupt has been generated so that the operating system handles the interrupt appropriately. Now take a look at the interrupt controller, there are two common interrupt controllers: Programmable Interrupt controller

Advanced Programmable Interrupt Controller (APIC ). The traditional 8259A is only suitable for a single CPU. it is now a multi-CPU, multi-core SMP system, so in order to make full use of the SMP architecture, intel introduced an advanced programmable interrupt controller (APIC) to deliver interruptions to each CPU in the system for better parallel performance and performance improvement ). Hardware support

Linux boot errors-general Linux technology-Linux technology and application information. For more information, see the following section. . An error is reported when using the CF card. Inux version 2.6.22.14HingeSoftware (guodemo @ hgsa) (gcc version 4.1.2 (Ubuntu 4.1.2-0ubuntu4) #4 SMP Wed Dec 5 23:41:28 CST 2007 BIOS-provided physical RAM map: BIOS-e820: 0000000000000000-00000000000a0000 (usable) BIOS-e820: 00000000000f0000-0000000000100000 (reserved) BIOS-e820: 0000000000100000-000000001f7f

[Kernel Document Series] NMIWatchdog Qin Baiyi Qinchenggang@sict.ac.cn [Both x86 and X86-64 architectures support NMI watchdog] Is your system locked frequently?Up )? After unlocking, the system no longer responds to the keyboard? Do you want to help us solve similar problems? If you answer "yes" to all questions, this document is for you. On a lot of X86/X86-64-structured hardware, we can use a mechanism called the "watchdog NMI interrupt. (NMI: nonMaskable Interrupt. the interruption can be

irqbalance. This service will regularly and evenly reallocate hardware service interruptions to various cpu numbers. In order to allocate the interrupted service to the isolated cpu number for the textile irqbalance service, the service should be disabled.# Service irqbalance stop# Chkconfig irqbalance offThe syntax for binding some interrupt numbers to one or more CPUs is echo cpu_mask>/proc/irq/# Cat/proc/irq/0/10/12/14/2/4/51/6/7/8/1/11/13/15/3/5/59/67/75/9/# Cat/proc/interrupts view the cur

on the respective CPUs programmable Interrupt Controller device name (REQUEST_IRQ dev_name field) CPU0 CPU1 CPU2 CPU3 0:42 0 2 io-apic- Edge Timer 1:752 3482 3 Io-apic-edge i8042 8:1 0 0 0 Io-apic-edge rtc0 9:0 4 0 0 io-apic-fasteoi ACPI 12: 2161987 Io-

1. SMP hardware architecture: For SMP, it is easiest to understand that the system has multiple identical CPUs. All CPUs share the bus and have their own registers. Shared bus is used for memory and external device access. In the Linux operating system, multiple CPUs share the same ing in the system space, which is completely equivalent. Because there are multiple CPUs in the system, this introduces a problem. When an external device is interrupted, which CPU is used for processing? To this end

the hard disk reads and writes much slower than memory, it is not as fast as Str. The advantage of STD is that it can be implemented only through software, such as Windows 2000, which can implement STD on hardware that does not support Str.Before power Management is APM (Advanced Power Management), what is the difference between ACPI and APM?2. ACPI VS APM ComparisonAPM 1.01.1: Power management performed by the BIOS;APM 1.2: The operating system defines the power management time, which is perfo

General Protection exceptions General_protection Do_general_protection 14 Page exception Page_fault Do_page_fault Handling Missing pages interrupts 15 Spurious_interrupt_bug Do_spurious_interrupt_bug 16 Coprocessor Error Coprocessor_error Do_coprocessor_error Send SIGFPE Signal 17 Alignment Check Interrupt Alignment_check Do_alignment_check

the system reservation, while for software interrupts, the interrupt number available is 0 to 255. In addition, 16 to 255 interrupts can be disable through the IF flag in EFlags if the IF flag in EFlags is cleared, indicating that the current CPU does not accept interrupts within this range, if it is set to 1, Indicates that the current CPU can handle interrupts in this range normally. how interrupts are sent to the CPU. Interrupts are first entered into a controller called Advanced Programmab

with the simple Protocol, the MSRP protocol can be used for text transmission of IM, just as with the SIP protocol, the RTP protocol can be used to transmit voice packets in an IP phone.JabberJabber:jabber is an open, XML-based protocol for the transmission and presentation of instant Messaging messages. Thousands of servers in the Internet use Jabber protocol-based software. A key concept in the Jabber system is "transmission", also called "Gateway", which allows users to access the network us

/proc/interrupts. Here 185 represents the network card eth1. # Cat/proc/interrupts CPU0 0: 1277238713 IO-APIC-edge timer 6: 5 IO-APIC-edge floppy 7: 0 IO-APIC-edge parport0 8: 1 IO-APIC-edge rtc 9: 1 IO-APIC-level acpi 14: 6011913 IO-API