06 2018 档案
摘要：Faults Faults result from error conditions that a handler might be able to correct. When a fault occurs, the processor transfers control to the fault
阅读全文
摘要：different levels of ECF: In general, we refer to these abrupt changes as exceptional control flow (ECF). Exceptional control flow occurs at all levels
阅读全文
摘要：Loading and Linking Shared Libraries from Applications Up to this point, we have discussed the scenario in which the dynamic linker loads and links sh
阅读全文
摘要：Executable Object Files The format of an executable object file is similar to that of a relocatable object file. The ELF header describes the overall
阅读全文
摘要：ref: http://www.linfo.org/free.html https://www.cnblogs.com/coldplayerest/archive/2010/02/20/1669949.html Memory consists of mainly of random access m
阅读全文
摘要：Relocation Once the linker has completed the symbol resolution step, it has associated each symbol reference in the code with exactly one symbol defin
阅读全文
摘要：Linking with Static Libraries In practice, all compilation systems provide a mechanism for packaging related object modules into a single file called
阅读全文
摘要：简介和分类 Linking is the process of collecting and combining various pieces of code and data into a single file that can be loaded (copied) into memory an
阅读全文
摘要：Hiding variable and function names with static C programmers use the static attribute to hide variable and function declarations inside modules, much
阅读全文
摘要：Serving Static Content Root Directory and Index Files If a request ends with a slash, NGINX treats it as a request for a directory and tries to find a
阅读全文
摘要：Configuring NGINX Plus as a Web Server At a high level, configuring NGINX Plus as a web server is a matter of defining which URLs it handles and how i
阅读全文
摘要：NGINX Load Balancing – TCP and UDP Load Balancer Configuring Reverse Proxy For UDP traffic, also include the udp parameter. TCP is the default protoco
阅读全文
摘要：Procedure Example 准备调用swap_add之前的代码： 此时，ebp指向顶部，esp指向中部，call之后push return address 要改变ebp之前必须保存，以便之后恢复： setup code for swap_add: 此时，ebp指向中部，esp指向中部 bod
阅读全文
摘要：Passive Health Checks When NGINX considers a server unavailable, it temporarily stops sending requests to the server until it is considered active aga
阅读全文
摘要：前言： 作为战斗民族的发明，Nginx在服务器网络处理方面因其稳定，高效，简洁的配置，出色的表现而被广泛使用 Docs written in English are the best material of mastering a specific technology. (ref: https:/
阅读全文
摘要：Loops： Instead, combinations of condi- tional tests and jumps are used to implement the effect of loops. Most compilers generate loop code based on th
阅读全文
摘要：Unary and Binary Operations unary operations: This operand can be either a register or a memory location. For example, the instruction incl (%esp) cau
阅读全文
摘要：主机的IP地址与硬件地址的区别： 数据报在传输过程中的流程： 需要注意的地方： 地址解析协议ARP ARP协议的用途是为了从网络层使用的IP地址，解析出在数据链路层使用的硬件地址 RARP协议叫逆地址解析协议，用于从硬件地址中找到IP地址。DHCP协议已经包含了这项功能。 每一台主机上都有一个ARP
阅读全文
摘要：不同语言的正则表达式的实现方法不一 PCRE表达式全集 https://www.regular-expressions.info/quickstart.html https://zh.wikipedia.org/wiki/%E6%AD%A3%E5%88%99%E8%A1%A8%E8%BE%BE%E5
阅读全文
摘要：网络层提供的两种服务： 网络层的设计思路： 基本情况如下： 情况如下图所示： 虚电路服务与数据报服务的对比： 一些网络连接的中间设备： 分组在互联网中的传送： 如图： IP地址编址方法历史： 两级IP地址的表示： IP地址 ::= {<网络号>,<主机号>} 网络号在整个互联网范围内唯一，主机号在网
阅读全文
摘要：１ 数据在网络中的时延主要包括四个部分： 发送时延：主机或路由器在发送数据帧时需要的时间 传播时延：电磁波在信道中的传播时间 处理时延：主机或路由器收到分组之后处理花费的时间 排队时延：分组在输入队列和输出队列的排队时间，时间长短取决于网络当时的通信量 ２物理层： 在物理层上传输的数据单位是比特 频
阅读全文
摘要：Data Formats 如图： Accessing Information 如图： The low-order 2 bytes of the first four registers can be independently read or written by the byte operatio
阅读全文
摘要：x86（wiki）： x86 is a family of backward-compatible(向后兼容) instruction set architectures[a]based on the Intel 8086 CPU and its Intel 8088 variant（变种）. IA
阅读全文
摘要：需要虚拟存储器的原因： As demand on the CPU increases, processes slow down in some reasonably smooth way. But if too many processes need too much memory, then so
阅读全文
摘要：根据文档（https://docs.python.org/2/tutorial/controlflow.html#more-on-defining-functions） 介绍了三种方法 1 Default Argument Values The most useful form is to spec
阅读全文
浙公网安备 33010602011771号