njm address

The physical and virtual storage spaces in the Linux system have a range of addresses ranging from 0x00000000 to 0xFFFFFFFF, with 4GB in total, but physical storage space is completely different from the virtual storage space layout. Linux runs in virtual storage space and is responsible for mapping the actual physical memory in the system, which is much less than 4GB, to the entire 4GB virtual storage space based on different requirements. Linux works primarily in protected mode. The 80x86 has

First, the conceptPhysical addresses (physical address)For memory chip-level cell addressing, corresponds to the address bus that the processor and CPU are connected to.This concept should be one of the best understanding of these concepts, but it is worth mentioning that although the physical address can be understood directly into the machine on the memory itse

Linux Memory Management---The difference between virtual address, logical address, linear address, physical address (i)This article describes the concept of four nouns, which are analyzed for four address conversionsThe CPU translates the

Topic:The address that belongs to the network 112.10.200.0/21 is () 112.10.206.0 112.10.217.0 112.10.224.0 112.10.198.0 Analytical Solutions:Summarize: First, understand what the back of that 21 means, 21 means that the first 21 bits of the IP represents the network address, the remaining 11 bits represents the host address. IP

Tags: exec processor cup attach segment memory management There is a des operation RIPThe analysis of Linux memory management mechanism, can not leave the above several concepts, before introducing the above concepts, first from the "deep understanding of the Linux kernel," the book to extract a few paragraphs on the above noun explanation:An explanation of the deep understanding of the Linux kernelLogical addresses (Logical address)Contains the

The analysis of Linux memory management mechanism, can not leave the above several concepts, before introducing the above concepts, first from the "deep understanding of the Linux kernel," the book to extract a few paragraphs on the above noun explanation:An explanation of the deep understanding of the Linux kernelLogical addresses (Logical address)Contains the address (a bit esoteric) used in machine langu

This article was reproduced from: http://blog.csdn.net/yusiguyuan/article/details/9664887The analysis of Linux memory management mechanism, can not leave the above several concepts, before introducing the above concepts, first from the "deep understanding of the Linux kernel," the book to extract a few paragraphs on the above noun explanation:An explanation of the deep understanding of the Linux kernelLogical addresses (Logical address)Contains the

Analysis of the Linux memory management mechanism, not from the above concepts, before introducing the above several concepts, first from the "in-depth understanding of the Linux kernel," the book excerpt from a few paragraphs on the above nouns explanation: first , "deep understanding of the Linux kernel" explanation Logical addresses (Logical address) An address (somewhat esoteric) that is contained in a

I. Concepts Physical address)It is used for memory chip-level unit addressing, which corresponds to the address bus connected to the processor and CPU.-- This concept should be better understood among these concepts, but it is worth mentioning that although physical addresses can be directly understood as the memory itself inserted on the machine, consider the memory as a large array of serial numbers from

Logical Address virtual address physical address bus address difference, logical Bus 1. Logical Address Logical Address is the most vague concept. The explanation in understanding the linux kernel is related to virtual addresses.

Reference"Deep understanding of computer systems"Deep understanding of the Linux kernel"80x86 assembly Language Programming""The design and implementation of the operating system" In order to protect the program and data in memory and share hardware support, in order to provide hardware support for realizing virtual memory, modern CPU not only uses the extended memory segment management mechanism , but also provides optional memory paging management mechanism. Physical addresses (physical

This article was reproduced from: http://blog.csdn.net/yusiguyuan/article/details/9668363This article describes the concept of four nouns, which are analyzed for four address conversionsThe CPU translates the address in one virtual memory space into a physical address, which requires two steps (for example):First, it will be given a logical

logical addresses (Logical address) means thatrelated to a segment generated by a programOffset Address Section. For example, you can read the pointer variable itself ( operation) in the C language pointer programming, which is actually the logical address, which is relative to the address of the data segment of your

IP address, subnet mask, network number, host number, network address, host address, IP address IP Address: 4-segment decimal, 32-bit binary, for example, 192.168.1.1 binary is: 11000000 | 10101000 | 00000001 | 00000001The subnet mask shows how many bits are the network numb

[To] http://bbs.chinaunix.net/thread-2083672-1-1.html I am going to post a year-end summary post for the Chinese New Year. It's just my personal understanding. It's incorrect.The hardware platform involved in this post is x86. If it is another platform, you may not be able to perform one-to-one check. However, I think it is completely feasible.I. Concepts Physical address) It is used for memory chip-level unit addressing, which corresponds to the

The hardware platform involved in this post is x86. If it is another platform, you may not be able to perform one-to-one check. However, I think it is completely feasible. I. Concepts Physical address)It is used for memory chip-level unit addressing, which corresponds to the address bus connected to the processor and CPU.-- This concept should be better understood among these concepts, but it is worth menti

1. Logical Address Logical Address is the most vague concept. The explanation in understanding the Linux kernel is related to virtual addresses. Based on the concept of hardware MMU and Software Memory Management, you can refer to the second chapter of utlk memory addressing, I have a very detailed explanation. However, the mips architecture processor used in the work is different. In the mips architecture

This blog post self-informed answer: Linux linear address, logical address and virtual address of the relationship?In order to prevent ambiguity, the following terms are used in English. Some of the terms are not explained, otherwise the answer will be too long.The following is an example of a code snippetUnder the Intel platform, the logical

 This article original address: http://blog.csdn.net/zhangrui_fslib_org/article/details/54943587 Reprint please indicate the source, there are questions or errors please email to zhangrui@fslib.org 1080P RTSP address and HLS address test flow Address "m3u8" test address