smp preempt

Head-common.S--- Specific actions--- Jump to init/Main. c--- B start_kernel// For more information about start_kernel, see Linux kernel. Chapter 8Main. cAsmlinkage void _ init start_kernel (void){Char * command_line;Extern struct kernel_param _ start ___ Param [], _ Stop ___ Param [];// To set the SMP process ID. Of course, the Code currently displayed is empty.Smp_setup_processor_id ();/** Need to run as early as possible, to initialize* Lockdep hash

Jianghu emergency ~~ -- Linux general technology-Linux technology and application information. For details, refer to the following section. Jul 17 04:02:03 abc syslogd 1.4.1: restart. Jul 17 04:02:10 abc kernel: Uhhuh. NMI received for unknown reason 21 on CPU 0. Jul 17 04:02:10 abc kernel: Dazed and confused, but trying to continue Jul 17 04:02:10 abc kernel: Do you have a strange power saving mode enabled? Jul 17 04:02:17 abc kernel: ------------ [cut here] ------------ Jul 17 04:02:17 abc ker

hard disk may be damaged, the virus may change the boot record, and the kernel may be incorrectly compiled to reimburse the system, even some stupid anti-virus programs may corrupt lilo. In this case, you may have to boot from DOS and reconfigure lilo. How to start Linux from DOS. Let's talk about how to deal with lilo now. Lilo configuration relies on editing/etc/lilo. conf implementation. The rule for this file is very simple. For example, this is my lilo file: [wanghy @ openlab/etc] $ cat li

Tags: update future Linux process ADL and so on manage Linux process management run www.Linux process Management (1) The birth of a process describes how to represent a process? The life cycle of a process, the creation of a process, and so on?Linux supports a variety of schedulers (Deadline/realtime/cfs/idle), where the CFS scheduler is most common. Linux process Management (2) The CFS Scheduler describes the priority, weight, virtual run time, CFS Scheduler class, the CFS process creation and

At the time of installation, the customer did not choose to install KERNEL-SMP, the system will be installed by default as a single processor core, users can upgrade the system by adding a multiprocessor core module. Specific steps: 1, start red Hat Linux as 4, log in as root, enter the character interface. 2, Decompression kernel-smp-2.2.14-5.0.i386.rpm package, (method many can enter the CD-ROM drive d

specific CPUPer_cpu (MY_PERCPU, cpu_id); //PER-CPU variables are exported for module use:Export_per_cpu_symbol (Per_cpu_var);EXPORT_PER_CPU_SYMBOL_GPL (Per_cpu_var); Example two:Dynamically allocating PER-CPU variables:void *alloc_percpu (type);void *__alloc_percpu (size_t size, size_t align); To use dynamically generated PER-CPU variables:int CPU;CPU = GET_CPU ();ptr = Per_cpu_ptr (MY_PERCPU);Using PTRPut_cpu ();Third, realize Why do you avoid preemption when using the API above, see the code

SMP/E is a tool in the z/OS system to manage the installation of z/OS and its associated products and to track the relevant fixes for these products. Currently, many articles have described how to use smp/e to install related products on z/OS. This article focuses on how to use smp/e to uninstall software products that are installed on z/OS. A software PRODUCT o

has a reference value of 30%, if WA is more than 30%, it indicates that the IO wait is serious, this may be caused by a lot of random access to disk, or the bandwidth bottleneck of disk or disk access controller (mainly block operation).HiSiSt2. Under Linux, how to confirm that it is multicore or multi-CPU:#cat/proc/cpuinfoMulti-core or multi-CPU if there are multiple projects similar to the following:processor:0......Processor:13. How to see which CPU a process is running on:#top-D 1Then press

Inter vt-x/ept or Amd-v/rvi#查看Linux内核是否载入了kvm模块lsmod | grep kvm# installs QEMU-KVM and generates/USR/LIBEXEC/QEMU-KVM after installation, which is the interface of the user space operation KVM Kernel, yum install qemu-kvm# upload ISO image files over the network #生成一个8G的文件 ( The file content is all 0), as the virtual machine's disk DD If=/dev/zero of=/cloud/centos.img bs=1m count=8192# use QEMU-KVM to create the virtual machine (parameter-m specifies the memory size-

virtual routers. The IP address of the router. Instance 1: Create vlan20 and vlan30 on SW1 and SW2 respectively. Both F0 and 2 are in vlan10 and F0 and 3 are in vlan20. Zheng In general, the traffic of vlan10 is from R1, and that of vlan20 is from vlan20. Configuration: R1 R2 Interface f0/0 interface f0/0 Noshutdown Interface f0/0.10 interface f0/0.10 Encapslution dot1q 10 encapslution dot1q 10 Ip add 192.168.10.1 255.255.255.0 ip add 192.168.10.2 255.255.255.0 Standby10 ip 192.168.10.254 stan

carp packets. Enabled bydefault.net.inet.carp.preempt Allow virtual hosts to preempt each other. Itis also used to failover carp interfaces as agroup. When the option is enabled and one ofthe carp enabled physical interfaces goes down,advskew is changed to 240 on all carp inter-faces. See also the first example. Disabledby default.net.inet.carp.log Value of 0 disables any logging. Value of 1enables logging of bad carp packets. Valu

Ubuntu command query version and kernel version 1 view ubuntu version: Method 1: catetcissue returned results: Ubuntu6062LTSnl Method 2: sudolsb_release-a returned results: NoLSBmodulesareavailableDistributorID: ubuntu command query version and kernel version 1. check the ubuntu version number. Method 1: cat/etc/issue. The Returned result is Ubuntu 6.06.2 LTS \ n \ l. Method 2: sudo lsb_release-a. the returned result is No LSB modules are available. distributor ID: UbuntuDescription: Ubuntu 6.6.

priority is greater than 0 (1-99). according to the preemptive priority scheduling algorithm. real-time tasks of ready state immediately preempt non-real-time tasks. When all tasks are using the Linux time-sharing scheduling strategy: 1, create a task to specify a time-sharing scheduling policy and specify a priority nice value ( -20~19). 2, the execution time on the CPU is determined based on the nice value of each task (counter). 3, if no reso

scenarios and requirements, its processor scheduling algorithm objectives are different, but there is a common goal is: to maximize the utilization of the processor* Task of process scheduling1. Save the processing machine field from the previous process2. Select the next process to process according to some scheduling algorithm3. Assign the processor to the selected process and start processing* How the process is dispatched1. Non-preemptive: When a process is assigned to a processor, the exec

The use of spin locks in operations in the lower half of the interrupt processing is especially necessary: the lower half process and the process context share data, because the processing of the lower part can preempt the process context code. Therefore, the process context should prohibit the execution of the lower half before adding a lock to the shared data, and then allow the execution of the lower part to unlock. The following for this point of

Programs running in the Linux kernel should always prevent competing states caused by concurrency. This will cause the data structure to be broken down and cause the kernel to crash in severe cases. Therefore, the kernel synchronization technology is very important to the driver developed by the kernel. People who do not understand the kernel synchronization technology cannot write secure and robust programs... information n programs running in the Linux kernel. they must always prevent competi

as the Java platform for testing, and Volanomark version 2.5.0.9. 　　 　　 III. test results In the test plan, the kernel is divided into 2.4.26, 2.6.6/supports kernel preemption and 2.6.6/does not support kernel preemption. by configuring the kernel and NF420R BIOS, three types of SMP scale are implemented: single-processor (UP) 4-cpu smp (SMP4) and 8-cpu smp