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problems: When the physical memory is greater than 1G, the kernel linear address space is less than the actual physical memory capacity, how the kernel to achieve greater than 1G of memory management? In this case, you need to mention the kernel space-to-memory management method. On the one hand, in order to improve the management efficiency of kernel space to memory, on the other hand, in order to simplify the kernel space memory management method, the kernel uses the linear mapping method to

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This article mainly introduces the comprehensive comparison of the two vrouters, as well as the working principle, performance factors, and decision indicators of the vrouters. Low-end routers and high-end routers are still commonly used. So I have studied the comprehensive comparison between the two vrouters. Here I will share with you, hoping to help you. Recen

Writing high-quality code-cultivation of Web Front-end development-Reading Notes and cultivation of web Front-end developmentPrefaceIn the past two weeks, I participated in the company's new project and used closed-end development (the project members developed in the conference room). I worked late at night, so I had

Recently, some netizens asked in the Forum: "low-end routers and high-end routers are similar in usage. Why is the price so far different ?" In fact, this question is very good, and many friends who are not familiar with the product and technology will basically have similar questions-"Why is this router so expensive with the same functions, another one is so che

') -Plt.plot (x2,y,linestyle='-', label='Linear') +Plt.plot (X2,y2,'-', lw=2,label='Cubic') - plt.legend () +Plt.show ()Summary:For this book ("NumPy Study Guide") learning to this is over, because NumPy for the special status of Python, for her familiarity with the learning process will inevitably accompany my remaining life is quite a long part, so there is no sadness, but the new pit is ready, ready to continue to do a great job. In 21 times, in this version of the World of Warcraft past a Tr

At present, the routing technology is developing rapidly, and the performance of routers is getting higher and higher. "low-end routers and high-end routers are similar in usage. Why is the price so far apart ?" In fact, this question is very good, and many friends who are not familiar with the product and technology will basically have similar questions-"Why is

High-quality projects-Bootstrap2 front-end framework and-bootstrap2 front-end framework Bootstrap introduction. Do I need to find N reasons for falling in love with Bootstrap? In front of you.Everyone is me, and everyone is me. Created by @ mdo and @ fat when working on Twitter, Bootstrap uses less css and uses Node to compile and host it on GitHub, so that yo

This article describes in detail how low-end and high-end routers think about network security, as well as the basic principles of routers. I believe this article will help you. Low-end routers and high-end routers are similar in

[Front-end performance] High-Performance rolling scroll and page rendering optimization, front-end scroll I recently studied the performance of page rendering and web Animation, and read the masterpiece CSS SECRET. This article mainly talks about page optimization rolling optimization. The main content includes the reasons for optimizing rolling events, the relat

management problem: When the physical memory is greater than 1G, the kernel linear address space is less than the actual physical memory space, how does the kernel implement the management of more than 1G memory? In this case, you need to mention the kernel space-to-memory management method. On the one hand, in order to improve the management efficiency of kernel space to memory, on the other hand, in order to simplify the kernel space memory management method, the kernel uses the linear mappin

"Low-end routers and high-end routers are similar in usage. Why is the price so far different ?" In fact, this question is very good, and many friends who are not familiar with the product and technology will basically have similar questions-"Why is this router so expensive with the same functions, another one is so cheap. "Why is Cisco's vro so expensive? And TP

Recently, some netizens asked in the Forum: "low-end routers and high-end routers are similar in usage. Why is the price so far different ?" In fact, this question is very good, and many friends who are not familiar with the product and technology will basically have similar questions-"Why is this router so expensive with the same functions, another one is so che

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1. Quirks mode and DTDStandard mode: Browser according to specification performance pageQuirks mode: Simulates old browser behavior to prevent old sites from working (in order to be compatible with old-fashioned browser code), Firefox will parse the Web page according to standard mode if it is omitted to write the DTD (document type definition) statement, but it will trigger the weird mode in IE.The difference between the two models is relatively large, the typical is the analysis of the box mod

High-end memory refers to memory with a physical address greater than 896M. For such memory, it is not possible to map in "Kernel Direct mapping Space".Why?Because "kernel direct mapping Space" can only be from 3G to 4G, only directly mapped 1G physical memory, for more than 1G of physical memory, powerless .In fact, "kernel direct mapping Space" also does not reach 1G, but also to leave a bit of linear spa