lock bootloader

Tags: consistency set get proof hibernate open Prim commit extLab Environment: mysql5.6 Storage Engine: InnoDB When we operate the database, there may be inconsistencies in data due to concurrency problems (data Conflicts)Optimistic lockOptimistic lock is not the database comes with, we need to implement it ourselves. Optimistic locking refers to the operation of the database (update operation), the idea is optimistic, that this operation will not le

Tags: processing let sha same share data exce where pessimistic lockInconsistencies in data that may occur due to concurrency problems when manipulating databases (data conflicts) ----Optimistic lock Optimistic lock is not the database comes with, we need to implement it ourselves. Optimistic locking refers to the operation of the database (update operation), the idea is optimistic, that this operation will

Parameter transfer of BootLoader and Linux kernel-general Linux technology-Linux programming and kernel information. For details, see the following. In an embedded system, BootLoader is used to initialize hardware, load the kernel, and pass parameters. Because the hardware environment of the embedded system is different, the BootLoader of the embedded system is a

Http://www.elecfans.com/article/87/107/2009/2009032939161.html During large-scale embedded system development, bootloader is often required to load and boot the system kernel. Most of the existing boot and boot modes require the line between the target machine and the host machine.Connection, which is inconvenient to use and inefficient. Based on the analysis of the existing loading and boot guide methods, this paper proposes an improved method, that

A new BootLoader boot guide method [Date:] Source: single-chip microcomputer and Embedded System Application Author: Xi'an University of Electronic Science and Technology Li Bo [Font:Large Medium Small] 　 IntroductionBootLoader is usually referred to as "System Boot Loader", which is the first program code executed after the system is powered on or reset. The main task of this program is to implement hardware device initialization

I had nothing to do in the company yesterday, so I had a rare opportunity to add value to myself. I watched two video tutorials on WindowsCE and recorded the bootloader. At the beginning, I was not very clear about the usage of bootloader. I only knew that it was called a system boot program. It was responsible for OS startup, but how was it started? What other functions does it have? How is it implemented

Before doing a test, repeatedly executed several times, found the result is the same:1. Single-threaded synchronized is the most efficient (at the time it felt its efficiency should be the worst);2. Atomicinteger efficiency is the most unstable, different concurrency performance is not the same: short time low concurrency, efficiency is higher than synchronized, sometimes even higher than longadder, but high concurrency, performance is not as good as synchronized, The performance is very unstabl

Reproduced, the source is unknown, the article is very good. One. bootloader Introduction Bootloader is the hardware in the power-on, in addition to the BIOS curing program to run the first software, responsible for loading the real operating system, can be understood as a very small OS. Currently in the Linux platform mainly has LILO, grub and so on, in the Windows platform mainly has NTLDR, bootmgr, GRLDR

Space LPC2200 Series Bootloader implementation process: There are similar implementations on the Internet, with NXP's official offer, this easy to obtain, on the Lpcware website can download the latest version, relatively speaking, this is a relatively complete project. And Zlg, AN070701, I looked at it, as if it was boot, and application in a project, this for me, not quite suitable, I want to do is two independent project, a boot, an app, but the ab

Transferred from: http://www.veryarm.com/1491.htmlThe ARM Linux startup process is roughly:bootloader ---->kernel---->root filesystem. Bootloader is a power-up to get control of the CPU, and bootloader implements the initialization of the hardware. Bootloader has become the "first to eat crab" code after power on.When it comes to this, you have to think about how

1. What is bootloader? In short, bootloader is a small program that runs before the operating system kernel runs. Through this small program, we can initialize hardware devices and build a map of memory space to bring the system's hardware and software environment to a suitable state, in order to prepare the correct environment for the final call to the operating system kernel. The Android system is based

on the New Technology of Embedded Software Remote self-updating mainly focuses on the design of the update method, and there is no in-depth research on how to ensure the reliability of the update process. The reliability of updates is mainly affected by two factors: first, the reliability of remote data transmission Update and the reliability of startup after system update. Embedded Linux and WindowsFor more complex operating systems such as Ce, an independent

self-test (POST), the connection operating system , and the interface that connects the operating system to the hardware. --Excerpt from Wikipedia In short, (U) EFI is an alternative to the traditional BIOS specification, OS startup phase we can no longer deal with the troublesome BIOS. And because Uefi completely uses the C-style programming interface, it means that we can only use C, C + + to guide our OS. Development Uefi can use EDK, however, in comparison, Intel's EFI Toolkit is n

Running GNU/Linux systems on dedicated embedded boards has become increasingly popular. An embedded Linux system can be divided into four levels from the software perspective: 1. Boot LoadingProgram. Includes the firmware (firmware) bootCode(Optional), and bootloader. 2. Linux kernel. Customized kernel and kernel startup parameters specific to embedded boards. 3. file system. Including the root file system and the file system built on t

Since December 15, my spare time has been tossing the PIC32MZ EC Starter Kit purchased at the end of 15. and successively wrote more than 10 essays documenting the course of my toss. Recently completed by the C language to achieve the PIC32 UART bootloader, the use of serial communication, suitable for Microchip PIC32MZ EC, the corresponding modification can also be applied to PIC32MX, PIC32MZ EF and so on. The Uart

Recently has been due to the four-axis school application, has been doing this thing, hey, helpless this goods is not as simple as imagined, their own write n long flight control, also did not fly up the plane, can only use open source APM fly control Practice practiced hand Bai, backup APM burning Bootloader method, for future use!Original address: http://bbs.diywrj.com/thread-21628-1-1.htmlRequired tool Material: 1, a avrusbasp programmer and the c

There are two ways to classify locks.(1) From the point of view of database systemLocks are grouped into the following three categories:• Exclusive Lock (Exclusive lock)A resource with exclusive lock locks is allowed only by programs that are locked, and no other action is accepted. When you perform a data Update command, which is the INSERT, UPDATE, or delete co

Original website: http://blog.csdn.net/akatope/article/details/6506101bootloader introduction of embedded Linux system SupportLinuxBootloader more, the development to 2010, there have been some inevitable results, some bootloader have disappeared, someBootloaderReplaced, some bootloader were merged, some, although in development, have retreated to a remote corner. Now for the mainstream or the application

Preliminary design of STM32 IAP bootloader based on TCP daniel_ustb 2015-8-22 Night Long time no write things, a lot of things happened in the previous period, now finally can calm down to the heart. Stop to look at the past self, all the way, the insistence on technology is how valuable. People's time is limited, as an embedded engineer, the love and curiosity of new technologies will produce the driving force ahead. As to what heights can be achi

Design and Implementation of secondary bootloader of the TMS320C6000 series: microprocessor and DSP | Source: electronic engineer | Author: Xie Shiyi Li yongchao Introduction With the extensive application of DSP (Digital Signal Processor) systems, the program scale is also expanding. the boot-loader of the chip itself is used to guide the DSP program through flash memory, it is often restricted by the program size and structure. For example, the pro