Linux

1, now practical kernel 3.10 has begun to practical DTS method. 2, the DTS node of the wording nodename@address{ compatible=xxx; xxx; };@Address is not necessary when the device does not have an address. 3, bootloader boot will

The Linux kernel provides 3 functions for nanosecond, subtle, and millisecond latencies, respectively: void Ndelay (unsigned long nsecs); void Udelay (unsigned long usecs); void Mdelay (unsigned long msecs); These 3 functions of the delay

The PER-CPU variable is a very interesting feature of the Linux kernel, and he assigns a copy of the variable to each processor in the system. The advantage of this is that in a multiprocessor system, when a processor operates on a copy of his

The Linux kernel ZONE have the following types: ZONE_DMA, Zone_normal and Zone_highmem. Each type of zone is suitable for different usage types: ZONE_DMA is the lower-end physical memory range for ISA device requests, ZONE_DMA physical page frames

Top is a dynamic display process, that is, the user can press the key to refresh the current state. If the command is executed at the foreground, it will monopolize the foreground until the user terminates the program. More precisely, the top

Hiredis is the API Development library for the C language interface of Redis Open Source Library. 1. Beginners are easy to confuse, Redis-server redis-client are applications, not related to the development interface. Http://redis.io/download

1. New file:/ect/init.d/tomcat 2, edit the contents of the file: #!/bin/sh #chkconfig: 2345 description:starts and Stops the Tomcat daemon. #by kanaka10 ############################################## #startup script for Tomcat on Linux

Download the latest Sogou input method Address: Http://pinyin.sogou.com/linux/?r=pinyin Click to install Set FCITX Terminal input Im-config, then a dialog box will appear, click OK, there is a dialog box, click Yes, you will see the following

Reproduced in: http://blog.csdn.net/syc0616/article/details/3734941 The DMA bus error on the cell is mostly due to the transfer memory start address that is not 16-bit aligned. Using Memalign, Valloc, (see below), malloc_aligned, the function is

Prepare to install a database, after automatically dividing the partition size on the virtual machine [Root@oracle ~]# Df-hFile system capacity has been used available with percent mount point/dev/mapper/vg_oracle-lv_root 50G 3.4G 44G 8%/Tmpfs 1004M

The need for text lookup: Grep,egrep,fgrep grep: Searches the text according to the pattern, and displays the line of conformance to the pattern, Pattern: A matching condition in which a literal character wildcards expressions a combination of the

There are two kinds of memory management mechanism in modern operating system: segment Management and page-type management.Segment memory management is to divide the memory into segments, the starting address of each segment is the Janki address.

Jump from electronic information engineering to computer, in the study of the image processing, found OpenCV is very fun, want to learn, there is no special good textbooks, the best document is the official tutorials, in the laboratory is busy, I

There is a good blog about the VFS http://www.ibm.com/developerworks/cn/linux/l-vfs/It is recommended that you read this article first, and then continue reading the article. VFS, a virtual file system that provides users with a file and file system-

Typically, initial Linux may not have the GCC compiler installed. For software enthusiasts who need to install GCC, they will need to install the GCC compilers themselves. Here is a REDHAT5 virtual machine Linux to describe how to install the GCC

Sure enough, these things will be forgotten for some time. 1. Compile the program Ctrl+alt+t into the terminalcd/home/... Enter the directory where the source program residesg++-O test test.cpp-lm complete compilation (not open O2) 2. To Pat Edit

Look back at the driver we wrote before Look at one. Why do I create a class why would I want to create a device under a class? To allow Mdev to create device nodes based on this information Let's see what device_create can do to get Mdev to create

LVM: Logical partition Management, which reduces the use of hardware devices based on dynamic scaling. Concept: PV, VG, LV PV (physical volume, with PP basic unit composition): Physical Disk VG (Volume group, composed of PV units): A collection of

http://blog.csdn.net/yusiguyuan/article/details/45155035 http://javathinker.iteye.com/blog/1733058 Preface In the development of the lower level, you need to understand how the program is stored. "Memory is always occupied by the process", which can

Note: This article is to learn the notes of teacher Zhu's curriculum, based on linux2.6.35.7 and jiuding x210bv3s Development Board for transplantation. /arch. Arch is the abbreviation of architecture. Arch Directory is a good number of