diff --git a/content/ComputerBasics/《操作系统》IO管理.md b/content/ComputerBasics/《操作系统》IO管理.md
index f8f935b..3f5152f 100644
--- a/content/ComputerBasics/《操作系统》IO管理.md
+++ b/content/ComputerBasics/《操作系统》IO管理.md
@@ -113,7 +113,7 @@ date: 2023-07-05T14:13:34+08:00
* 根据CPU的命令对相应设备发送命令
* 用于实现设备控制功能
* 组成图
- * 
+ * 
### 设备控制器的三种寄存器（可被CPU直接访问的寄存器，也叫IO端口）
@@ -173,7 +173,7 @@ date: 2023-07-05T14:13:34+08:00
* 每个DMA控制器对应一台设备与内存传递数据
* DMA方式主要用于块设备，磁盘尤其是典型的块设备
* 示例图
- * 
+ * 
### 通道控制方式
@@ -189,7 +189,7 @@ date: 2023-07-05T14:13:34+08:00
* 通常包含许多非分配型字通道，数量可以达到几十到几百个，每个通道连接一台IO设备，并控制该设备的IO操作
* 常用于连接大量低速或中速IO设备
* 示例图
- * 
+ * 
### 四种方式比较
@@ -247,22 +247,22 @@ date: 2023-07-05T14:13:34+08:00
### 设备分配依据的数据结构
* 设备、控制器、通道间的关系
- * 
+ * 
* 设备控制表（DCT）
* 系统为每个设备配置一张DCT
* 用于记录设备情况
- * 
+ * 
* 控制器控制表（COCT）
* 每个设备控制器都会对应一张COCT
* 操作系统会根据COCT的信息对控制器进行操作管理
- * 
+ * 
* 通道控制表（CHCT）
* 每个通道都会对应一张CHCT
* 操作系统会根据CHCT的信息对通道进行操作管理
- * 
+ * 
* 系统设备表（SDT）
* 记录了系统中全部设备的情况，每个设备对应一个表目
- * 
+ * 
### 逻辑设备名到物理设备名的映射
@@ -311,25 +311,25 @@ date: 2023-07-05T14:13:34+08:00
* 单缓冲
* 流程
* Max(C,T) + M
- * 
+ * 
* T > C 时，处理一块数据需要（T + M）
- * 
+ * 
* T < C 时，处理一块数据需要（C + M）
- * 
+ * 
* 双缓冲
* 流程
* Max(T,C + M)
- * 
+ * 
* T > C + M 时，平均处理一个数据块需要时间T
- * 
+ * 
* T < C + M 时，平均处理一个数据块需要时间(C + M)
- * 
+ * 
* 循环缓冲
* 将多个大小相等的缓冲区连接成一个循环队列
* 下图中橙色表示已充满数据的缓冲区，绿色表示空缓冲区
* 当需要向缓冲区中充入数据时，只要找到in指针指向的空缓冲区，向其中充入数据，然后再把in指针指向下一个空缓冲区
* 当需要取出满缓冲区的内容时，找到out指针执行的满缓冲区，读取完数据后，将指针指向下一个满缓冲区
- * 
+ * 
* 缓冲池
* 缓冲池由系统中共用的存放在主存中的缓冲区组成，被认为是最好的方法
* 缓冲区根据使用情况分为
@@ -341,7 +341,7 @@ date: 2023-07-05T14:13:34+08:00
* 用于提取输入数据的工作缓冲区（sin）
* 用于收容输出数据的工作缓冲区（hout）
* 用于提取输出数据的工作缓冲区（sout）
- * 
+ * 
## SPOOLing技术（假脱机技术）
@@ -371,7 +371,7 @@ date: 2023-07-05T14:13:34+08:00
* 输入缓冲区用于暂存从输入设备输入的数据，之后再转存到输入井中
* 输出缓冲区用于暂存从输出井传送的数据，之后再传送到输出设备上
* 流程图
- * 
+ * 
### SPOOLing系统的优特点
@@ -397,7 +397,7 @@ date: 2023-07-05T14:13:34+08:00
### 基本概念和结构
-
+
* 基本结构
* 磁盘
@@ -509,7 +509,7 @@ date: 2023-07-05T14:13:34+08:00
* 处理顺序
* 98,183,37,122,14,124,65,67
* 寻道示例图
- * 
+ * 
* 最短寻找时间优先（SSTF）
* 思想
* 优先选择从当前磁头位置所需寻道时间最短的请求
@@ -522,7 +522,7 @@ date: 2023-07-05T14:13:34+08:00
* 处理顺序
* 65,67,37,14,98,122,124,183
* 寻道示例图
- * 
+ * 
* 扫描/电梯算法（SCAN）
* 思想
* 磁头在一个方向上移动，访问所有未完成的请求，直到磁头到达该方向上的最后的磁道，才调换方向
@@ -536,7 +536,7 @@ date: 2023-07-05T14:13:34+08:00
* 磁头先响应左边的请求，到达最左端后才开始反向移动，响应右边的请求
* 37,14,0,65,67,98,122,124,183
* 寻道示例图
- * 
+ * 
* C-SCAN算法
* 思想
* 只有磁头朝某个特定方向移动时，才处理磁道访问请求
@@ -553,7 +553,7 @@ date: 2023-07-05T14:13:34+08:00
* 直到到达最开始的磁道后，才继续顺序响应右边的请求
* 65,67,98,122,124,183,199,0,14,37
* 寻道示例图
- * 
+ * 
diff --git a/content/ComputerBasics/《操作系统》内存管理.md b/content/ComputerBasics/《操作系统》内存管理.md
index f7a5bf7..a2e71fb 100644
--- a/content/ComputerBasics/《操作系统》内存管理.md
+++ b/content/ComputerBasics/《操作系统》内存管理.md
@@ -45,7 +45,7 @@ date: 2023-07-03T20:39:49+08:00
过程图
-
+
* 编译
* 由编译程序将用户源代码编译程若干目标模块
@@ -62,7 +62,7 @@ date: 2023-07-03T20:39:49+08:00
* 可重定位装入：装入时把逻辑地址转换为物理地址，但装入后不能改变
* 动态重定位装入：执行时再决定装入的地址并装入，装入后有可能会换出
-
+
### 逻辑地址与物理地址
@@ -91,7 +91,7 @@ date: 2023-07-03T20:39:49+08:00
* 堆：用来存放动态分配的变量【动态的】
* 栈：用来实现函数调用的【动态的】
-
+
### 内存保护
@@ -105,7 +105,7 @@ date: 2023-07-03T20:39:49+08:00
* 界地址寄存器含逻辑机制的最大值【用于比】
* 逻辑地址+重定位寄存器的值 = 物理地址
-
+
### 内存共享
@@ -274,11 +274,11 @@ date: 2023-07-03T20:39:49+08:00
利用段表实现物理内存区映射
-
+
分段系统的地址变换过程
-
+
### 分页
@@ -333,7 +333,7 @@ date: 2023-07-03T20:39:49+08:00
* 分页产生的页表过大，使用多级页表来解决空间上的问题
-
+
* 两级页表地址变换
* 一级页表覆盖到全部虚拟地址空间，二级页表在需要时创建
@@ -341,7 +341,7 @@ date: 2023-07-03T20:39:49+08:00
* 页表寄存器存放的是一级页表起始物理地址
* 多层参与，时间上开销大，加入TLB，提高地址的转换速度
-
+
* 具有快表的地址变换
* 快表是相联存储器（TLB）
@@ -351,7 +351,7 @@ date: 2023-07-03T20:39:49+08:00
* CPU芯片中，封装了MMU（内存管理单元）
* MMU用来完成地址转换和TBL的访问与交互
-
+
### 段页
@@ -364,9 +364,9 @@ date: 2023-07-03T20:39:49+08:00
* 对内存的管理以存储块为单位，地址空间是二维的
* 演示图例
-
+
-
+
* 得到物理地址的3次内存访问
@@ -470,7 +470,7 @@ date: 2023-07-03T20:39:49+08:00
* 从内存中换出一页
* 地址变换过程
-
+
### 页框分配（进程准备执行时，由OS决定给特定进程分配几个页框）
@@ -591,5 +591,5 @@ date: 2023-07-03T20:39:49+08:00
使用页表的地址翻译
-
+
diff --git a/content/ComputerBasics/《操作系统》大题总结.md b/content/ComputerBasics/《操作系统》大题总结.md
index fa2c073..c391fef 100644
--- a/content/ComputerBasics/《操作系统》大题总结.md
+++ b/content/ComputerBasics/《操作系统》大题总结.md
@@ -22,7 +22,8 @@ date: 2023-07-06T11:24:18+08:00
----
-
+
+
``` C
Semaphore mutex1 = 1 //互斥访问F1
@@ -75,7 +76,7 @@ F_C(){
```
-
+
```C
@@ -156,7 +157,7 @@ while(1){
```
-
+
```C
Semaphore empty = 10;//空座位的数目
@@ -236,7 +237,7 @@ process(){
```
-
+
通常解
@@ -352,7 +353,7 @@ solo(){
```
-
+
（1）
```C
@@ -407,7 +408,7 @@ NtoS(){//北到南
}
```
-
+
```C
Semaphore room = 1;
@@ -497,21 +498,21 @@ P3(){
* 一级页表+虚拟内存+TLB
* 二级页表+虚拟内存+TLB
-
+
TLB+二级页表+Cache(全相联映射)
-
+
TLB+二级页表+Cache(2路组相联映射)
-
+
TLB + 二级页表 + Cache(直接映射)
-
+
---
-
+
（1）
@@ -539,7 +540,7 @@ TLB + 二级页表 + Cache(直接映射)
代码2起始物理地址 = 00901000H
-
+
页的大小 = 4KB = $2^{12}$B，页面位移比虚拟地址低12位
@@ -570,7 +571,7 @@ TLB + 二级页表 + Cache(直接映射)
物理地址 = 101565H
-
+
（1）
@@ -594,7 +595,7 @@ TLB + 二级页表 + Cache(直接映射)
物理地址为 0000 1011 1100 1010 = 0BCAH
-
+
（1）
@@ -617,7 +618,7 @@ TLB + 二级页表 + Cache(直接映射)
适合，程序的时间局部性越好，从空闲页框链表中重新取回的机会越大，该策略优势越明显
-
+
（1）
@@ -644,7 +645,7 @@ TLB + 二级页表 + Cache(直接映射)
访问的是同一个二级页表，即供访问一个二级页表
-
+
（1）
@@ -668,7 +669,7 @@ TLB + 二级页表 + Cache(直接映射)
修改位$\rightarrow$修改字段
-
+
（1）
@@ -706,16 +707,16 @@ a[1][2]的虚拟地址为 10801000H + 4 $\times$ 2 = 10801008H
显式链表分配法（FAT文件系统，即DOS）
-
+
混合索引法（Unix文件系统）
-
+
### 考题
-
+
（1）
@@ -729,7 +730,7 @@ FCB集中存放，文件数据集中存放
这样在随机查找文件名时，只需访问FCB对应的块，可减少磁头移动和磁盘IO访问次数
-
+
（1）
@@ -753,7 +754,7 @@ FCB集中存放，文件数据集中存放
块数可表示$2^{32}$个块，共4TB
-
+
（1）
@@ -794,7 +795,7 @@ FAT最大长度 = $2^{16} \times 2B = 128KB$
即访问48号簇，106号簇
-
+
（1）
@@ -820,7 +821,7 @@ F的文件控制区的起始块号和文件长度内容会发生改变
文件长度为$1020B \times 4G = 4080GB$
-
+
（1）
@@ -860,7 +861,7 @@ $F_2$采用一级索引$\rightarrow$ 还需读一级索引表
### 大题
-
+
（1）
@@ -893,7 +894,7 @@ Flash半导体存储器不需要考虑寻道时间和旋转延迟
可直接按IO请求的先后顺序服务
-
+
（1）
@@ -922,7 +923,7 @@ $30 \times 2 = 60$
将簇号转换成磁盘物理地址的过程由磁盘驱动程序完成
-
+
（1）
diff --git a/content/ComputerBasics/《操作系统》文件管理.md b/content/ComputerBasics/《操作系统》文件管理.md
index 46ef346..5392e76 100644
--- a/content/ComputerBasics/《操作系统》文件管理.md
+++ b/content/ComputerBasics/《操作系统》文件管理.md
@@ -85,7 +85,7 @@ date: 2023-07-04T16:56:55+08:00
* 新增内容：索引节点编号；状态；访问计数；逻辑设备号；链接指针
-
+
### 文件操作
@@ -206,7 +206,7 @@ close(fd);//关闭文件
* 缺点
* 要求连续的存储空间，会产生外部碎片，不利于文件的动态扩充
* 例图
- * 
+ * 
* 链表分配
* 特点
* 存放是离散的，不用连续的，于是就可以消除磁盘碎片
@@ -222,7 +222,7 @@ close(fd);//关闭文件
* 缺点
* 只能按照文件的指针链顺序访问，查找效率低，指针信息存放消耗内存或磁盘空间
* 例图
- * 
+ * 
* 索引分配
* 特点
* 为每个文件创建一个索引数据块存放指向文件数据块的指针列表
@@ -234,12 +234,12 @@ close(fd);//关闭文件
* 缺点
* 索引表增加存储空间的开销，索引表的查找策略对文件系统效率影响较大
* 例图
- * 
+ * 
* 链表 + 索引
* 特点
* 索引数据块留出一个存放下一个索引数据块的指针
* 例图
- * 
+ * 
* 索引 + 索引（多级索引）
* 特点
* 通过一个索引块来存放多个索引数据块
@@ -265,12 +265,12 @@ close(fd);//关闭文件
* 为所有空闲空间建立一张表
* 表内容包括空闲区的第一个块号和该空闲区的块个数
* 例图
- * 
+ * 
* 空闲链表法
* 每一个空闲块里有一个指针指向下一个空闲块
* 这样能够很方便地找到空闲块并管理起来
* 例图
- * 
+ * 
* 位图法
* 位图时利用二进制的一位来表示磁盘中一个盘块的使用情况
* 磁盘上所有的盘块都有一个二进制与之对应
@@ -328,7 +328,7 @@ close(fd);//关闭文件
* 在磁盘中的结构
* 例图
- * 
+ * 
* 引导块
* 在系统启动时用于启用引导
* 块组
@@ -371,7 +371,7 @@ close(fd);//关闭文件
### 用户空间、系统调用、虚拟文件系统、缓存、文件系统和存储之间的关系
-
+
### 分区和安装
@@ -415,7 +415,7 @@ close(fd);//关闭文件
* 不便于文件共享
* 不适合多用户的OS
* 结构图
- * 
+ * 
* 两级目录结构
* 定义
* 文件目录分为主文件目录MDF和用户文件目录UFD
@@ -427,7 +427,7 @@ close(fd);//关闭文件
* 缺点
* 缺乏灵活性，不能对文件分类
* 结构图
- * 
+ * 
* 树型目录结构
* 定义
* 使用绝对路径，相对路径，当前路径的结构
@@ -440,7 +440,7 @@ close(fd);//关闭文件
* 利于文件共享
* 查找文件增加了磁盘访问次数，会影响查询速度
* 例图
- * 
+ * 
* 无环图目录结构
* 定义
* 在树型目录结构上
@@ -450,7 +450,7 @@ close(fd);//关闭文件
* 缺点
* 使系统的管理变得更加复杂
* 例图
- * 
+ * 
### 目录的查询/检索
@@ -494,7 +494,7 @@ close(fd);//关闭文件
* 若得到的值不为0，则不能删除此文件
* 即只要还有一个指针在，索引节点就不会被删除
* 例图
- * 
+ * 
* 基于符号链实现文件共享【软链接】
* 定义
* 软链接相当于重新创建一个文件
diff --git a/content/ComputerBasics/《操作系统》计算机系统概述.md b/content/ComputerBasics/《操作系统》计算机系统概述.md
index d177e42..f72884a 100644
--- a/content/ComputerBasics/《操作系统》计算机系统概述.md
+++ b/content/ComputerBasics/《操作系统》计算机系统概述.md
@@ -301,7 +301,7 @@ date: 2022-08-18T15:53:40+08:00
-
+
* 启动过程
1. CPU加电，CS:IP指向FFFF0H
diff --git a/content/ComputerBasics/《操作系统》进程与线程.md b/content/ComputerBasics/《操作系统》进程与线程.md
index cbc4d8f..7bc61a0 100644
--- a/content/ComputerBasics/《操作系统》进程与线程.md
+++ b/content/ComputerBasics/《操作系统》进程与线程.md
@@ -332,7 +332,7 @@ date: 2023-07-01T15:59:00+08:00
* 克服了多对一模型的并发度不高的缺点
* 克服了一对一模型的一个用户进程占用太多内核线程而开销打的缺点
-
+
## 处理机调度
@@ -348,7 +348,7 @@ date: 2023-07-01T15:59:00+08:00
* 调度是多道程序OS的基础：调度是OS设计的核心问题
* 层次分类模型图
-
+
* 高级调度、作业调度
* 是内存与辅存的调度，从后备队列中调度作业
@@ -371,7 +371,7 @@ date: 2023-07-01T15:59:00+08:00
* 调度程序结构图
-
+
* 调度器的组成
* 用于调度和分派CPU的组件
@@ -949,16 +949,16 @@ do{
#### 安全性算法和银行家算法例题举例
-
+
安全性算法解法
-
+
银行家算法解法
-
+
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