system analysis book

Article title: detailed analysis of Linux operating system source code. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Introduction: Linux has all the functions of modern operating systems, such as preemptive multi-task proc

Because the author's level of experience is limited, the creation of a hasty, the book will inevitably have errors and inaccurate places, please the vast number of readers criticize ( message ), look forward to exchange learning, common progress.Errata and SupportQQ Group: 117174700Space Portal: http://xhnetops.home.news.cnMail Box:[email protected]Chapter Catalogue of this book:http://xhnetops.home.news.cn/portal/blog/article/219896850The

In the previous article, we briefly introduced the surfaceflinger service in the surface mechanism of the Android system. The surfaceflinger service is started in the system process and is responsible for unified management of the device's frame buffer. When the surfaceflinger service is started, two threads are created. One thread is used to monitor console events, and the other thread is used to render th

, [p_proc_ready] Lldt [esp + p_ldt_sel] lea EAX, [ESP + p_stacktop] mov dword[tss + tss3_s_sp0], eax . Re_enter: Dec dword[k_reenter] ; restore the contents of the original Register pop GS pop fs pop es pop ds popad add ESP, 4 Iretd We use the dispatch module to complete the scheduling of the process, which is simple, which is to run each process in the process table sequentially. We can look at the Clock_handler function. It is done in this way: public void Clock_handler (int I

list function interface, which correspond to many functions described above one by one. RCU (read-copy update) is a new technology introduced in the 2.5/2.6 kernel. It improves synchronization performance through delayed write operations. As we know, the number of data read operations in the system is much higher than the number of write operations, and the rwlock mechanism will rapidly decline as the number of processors increases in the SMP environ

1. What is computer performanceThe so-called computer performance (performance) usually refers to the speed of the computer, which is the reciprocal of the program execution time. The program execution time refers to the waiting time after the user sends a task to the computer until he gets the result he needs. Including:1. time to access disk and access storage2.CPU operation Time3.I/O Action Time4. operating system overhead time and so on. 2.LinuxDe

I. Purpose of constructiona food and beverage group needs to analyze the financial situation of each branch, currently use Excel to store revenue for each region , the income summary data for each month of each region is through a multi-sheet Way Show, as the catering group is a relatively large catering group, many areas have branches. So, just for the income situation, you need to do a lot of Excel to make a summary of the revenue storage. This leads to the query history data is very troubles

I found that today, almost Eminence Oo and UML, there are still a lot of system analysts who have a smattering of Oo and UML, and even many system analysts who have been using UML for a long time. So I intend to write a series of articles, will be a summary of the work experience over the years. For beginners to play a role in the Enlightenment, but also hope to throw bricks, and all the way prawns togethe

build the implementation of the index part in (Org. apache. lucene. the core of the index. Based on the core of the index, the external interfaces org. Apache. Lucene. Search and org. Apache. Lucene. analysis are designed. Lucene fully applies this criterion to every part of the details, such as some common data structures and algorithms. With the support of highly object-oriented theory, Lucene is easy to understand and expand. Lucene introduces an

I found that today, when Oo and UML are almost the same, many system analysts still have a thorough understanding of OO and UML, and even many system analysts who have been using UML for a long time. So I plan to write a series of articles to summarize my work experience over the years. It is an enlightening function for beginners. I also hope to give a brick-and-mortar look and discuss it with prawns and i

capacity can be expanded to support 100 users in a network with 1 million or more sites, with built-in redundancy to ensure reliable services. Cisco uniied CallManager is equipped with a series of innovative and powerful features, including easier dial-up integration with Microsoft Outlook Address Book, analysis and reporting tools for specific call records, and an operator console, and conference call fun

In the previous article "UML System Analysis and Design 02-use case diagram and activity diagram (I)", we mainly explained the use case analysis and drawing methods and techniques in requirement analysis, however, the use case diagram only tells us what the system wants to d

system, such as a printer. To manage print tasks, the system needs to start services such as CUPS, and if the printer does not have access to the system, starting these services is a waste. Sysvinit has no way of dealing with this kind of demand, it must start all possible services at once, and even if the printer is not connected to the

of inventory operationsTake down inventory (user experience is good)Payment Reduction Inventory The order is as simple as possible, the purchase data is 1 and cannot be edited, the shipping address and payment method is blank or the user defaults, allow the order to be modified after submission.GeckoLinks: https://www.jianshu.com/p/cf82e1f44b2bSource: PinterestThe copyright of the book is owned by the author, and any form of reprint should be co

server has been compromised and has a rootkit-level backdoor installed.3, broken network analysis systemSince the server is sending out packets, the first thing to do is to disconnect the server from the network and then analyze the system log for the source of the attack. However, the system command has been replaced, if you continue to perform operations on th

Richie2006-12-31RicCC: http://www.cnblogs.com/RicCC/archive/2006/12/31/608925.html This is a practice of a system. I feel inspired by the architect's system analysis and design ideas, so I will write it out and share it with you.In a large system, the business and system are

Because the author's level of experience is limited, the creation of a hasty, the book will inevitably have errors and inaccurate places, please the vast number of readers criticize ( message ), look forward to exchange learning, common progress.Errata and SupportQQ Group: 117174700Space Portal: http://xhnetops.home.news.cnMail Box:[email protected]Chapter Catalogue of this book:http://xhnetops.home.news.cn/portal/blog/article/219896850The

Linux Kernel Analysis Eighth Week study summary-process switching and system general execution processHuang (Original works reproduced please specify the source)"Linux kernel Analysis" MOOC course http://mooc.study.163.com/course/USTC-1000029000I. SUMMARY OF KNOWLEDGE Basic concepts and related knowledge of process scheduling in Linux How the schedul

When dealing with a variety of failures in a Linux system, the symptoms of the failure are the first to be discovered, and the cause of this failure is the key to eventual troubleshooting. Familiar with the Linux system log management, understanding common fault analysis and solutions, will help administrators quickly locate the point of failure. "The right remed

Finally, it's almost over. This will be the last of the use Case Analysis series, resulting in the requirement specification to end the requirements analysis process. After seven previous jobs, we get the business use case model from the initial business use case acquisition, which is our business scope; After analysis, we get the business scenario, which is our