logical vs physical address
Logical vs physical address
1) An address generated by the CPU is a logical address. Whereas, an address seen by the memory unit, that is, the one loaded into the memory-address register of the memory, is a physical address.
2) The user program never sees the physical addresses. The program creates a pointer to a logical address, say 346, stores it in memory, manipulate it, compares it to other logical addresses- all as the number 346.
Only when a logical address is used as memory address, it is relocated relative to the base/relocation register. The memory-mapping hardware device called the memory- management unit(MMU) converts logical addresses into physical addresses.
3) Logical addresses range from 0 to max. User program that generates logical address thinks that the process runs in locations 0 to max. Logical addresses must be mapped to physical addresses before they are used. Physical addresses range from (R+0) to (R + max) for a base/relocation register value R.
4) Example:
logical vs physical address的更多相关文章
- Logical Address->Linear Address->Physical Address
3 registers for starting pos: LDTR, GDTR( register for starting addr of DT) ---段描述符每个段由一个8字节(64位)的段描 ...
- Life of an Oracle I/O: tracing logical and physical I/O with systemtap
https://db-blog.web.cern.ch/blog/luca-canali/2014-12-life-oracle-io-tracing-logical-and-physical-io- ...
- Linear to physical address translation with support for page attributes
Embodiments of the invention are generally directed to systems, methods, and apparatuses for linear ...
- Logical read, Physical read (SET STATISTICS IO)
在查询性能优化时,Logical Read非常重要,它的计数一般与查询出来的结果集数量成正比,与数据读取的速度也成正比. 1,SET STATISTICS IO 显式Disk IO的信息 Syntax ...
- Partitioning
COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION The simplest scheme f ...
- Optimizing TLB entries for mixed page size storage in contiguous memory
A system and method for accessing memory are provided. The system comprises a lookup buffer for stor ...
- Application binary interface and method of interfacing binary application program to digital computer
An application binary interface includes linkage structures for interfacing a binary application pro ...
- Variability aware wear leveling
Techniques are presented that include determining, for data to be written to a nonvolatile memory, a ...
- Solid-state storage management
Solid-state storage management for a system, the management including establishing, externally to a ...
随机推荐
- 平衡树前置——BST
上一节:平衡树——序 BST(Binary Search Tree)二叉排序树,其定义为:二叉排序树或者是空树,或者是满足如下性质的二叉树: ①若它的左子树非空,则左子树上所有结点的值均小于根结点的值 ...
- HTML的基本操作学习----常用标签,特殊符号,列表,表格,表单
什么是HTML 常用标签 标题标签 段落标签 粗体标签+斜体 超链接标签 图片标签 列表标签 无序标签 有序标签 自定义列表 div标签 特殊符号 表格 表单 HTML 什么是 HTML? HTM ...
- AIM Tech Round (Div. 2)——ABCD
http://codeforces.com/contest/624 A.python是用来写div2的AB题的... a, b, x, y = map(float, raw_input().split ...
- MySql数据库优化可以从哪几个方面进行?
1.选取最适用的字段属性 MySQL可以很好的支持大数据量的存取,但是一般说来,数据库中的表越小,在它上面执行的查询也就会越快.因此,在创建表的时候,为了获得更好的性能,我们可以将表中字段的宽度设得尽 ...
- NetworkManager
网络管理器(NetworManager)是检测网络.自动连接网络的程序.无论是无线还是有线连接,它都可以令您轻松管理.对于无线网络,网络管理器优先连接已知的网络并可以自动切换到最可靠的无线网络.利用网 ...
- hdu 3657最大点权独立集变形(方格取数变形)
/* 分奇偶为二部图,s与奇建图,t与偶建图,权值为当前数的值,如果遇到必取的权值置为inf. 奇偶建边为相邻的权值为2*(x&y):所有数的值-最小点全覆盖. 置为inf意为不能割掉.奇偶边 ...
- android:怎样用一天时间,写出“飞机大战”这种游戏!(无框架-SurfaceView绘制)
序言作为一个android开发人员,时常想开发一个小游戏娱乐一下大家,今天就说说,我是怎么样一天写出一个简单的"飞机大战"的. 体验地址:http://www.wandoujia. ...
- [NetworkFlow]网络流建模相关
流 网络流问题本质上是线性规划问题的应用之中的一个,线性规划问题的标准形式是给出一组等式约束和不等式约束.要求最优化一个线性函数. 在流问题中,变量以流量的形式出如今问题中,我们给出一个流网络(以有向 ...
- LeetCode60:Permutation Sequence
The set [1,2,3,-,n] contains a total of n! unique permutations. By listing and labeling all of the p ...
- WPF学习笔记——为BUTTON添加背景图片
首先要肯定,代码: <Style x:Key="UserItemButton" TargetType="Button"> <Setter Pr ...