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- <li class="chapter " data-level="2.1.4" data-path="../网络编程/Linuxepoll模型（含LT模式和ET模式详解）.html">
-
- <a href="../网络编程/Linuxepoll模型（含LT模式和ET模式详解）.html">
-
-
- Linux epoll 模型（含LT 模式和 ET 模式详解）
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="2.1.5" data-path="../网络编程/socket的阻塞模式和非阻塞模式.html">
-
- <a href="../网络编程/socket的阻塞模式和非阻塞模式.html">
-
-
- socket 的阻塞模式和非阻塞模式
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="2.1.6" data-path="../网络编程/非阻塞模式下send和recv函数的返回值.html">
-
- <a href="../网络编程/非阻塞模式下send和recv函数的返回值.html">
-
-
- 非阻塞模式下 send 和 recv 函数的返回值
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="2.1.7" data-path="../网络编程/服务器开发通信协议设计介绍.html">
-
- <a href="../网络编程/服务器开发通信协议设计介绍.html">
-
-
- 服务器开发通信协议设计介绍
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="2.1.8" data-path="../网络编程/TCP协议如何解决粘包、半包问题.html">
-
- <a href="../网络编程/TCP协议如何解决粘包、半包问题.html">
-
-
- TCP 协议如何解决粘包、半包问题
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="2.1.9" data-path="../网络编程/网络通信中收发数据的正确姿势.html">
-
- <a href="../网络编程/网络通信中收发数据的正确姿势.html">
-
-
- 网络通信中收发数据的正确姿势
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="2.1.10" data-path="../网络编程/服务器端发数据时，如果对端一直不收，怎么办？.html">
-
- <a href="../网络编程/服务器端发数据时，如果对端一直不收，怎么办？.html">
-
-
- 服务器端发数据时，如果对端一直不收，怎么办？
-
- </a>
-
-
- </li>
-
- </ul>
-
- </li>
-
-
-
- <li class="divider"></li>
-
-
-
- <li class="chapter " data-level="3.1" data-path="../程序员必知必会的网络命令/">
-
- <a href="../程序员必知必会的网络命令/">
-
-
- 程序员必知必会的网络命令
-
- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="3.1.1" data-path="../程序员必知必会的网络命令/利用telnet命令发电子邮件.html">
-
- <a href="../程序员必知必会的网络命令/利用telnet命令发电子邮件.html">
-
-
- 利用telnet命令发电子邮件
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="3.1.2" data-path="../程序员必知必会的网络命令/做Java或者C++开发都应该知道的lsof命令.html">
-
- <a href="../程序员必知必会的网络命令/做Java或者C++开发都应该知道的lsof命令.html">
-
-
- 做Java或者C++开发都应该知道的lsof命令
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="3.1.3" data-path="../程序员必知必会的网络命令/Linux网络故障排查的瑞士军刀.html">
-
- <a href="../程序员必知必会的网络命令/Linux网络故障排查的瑞士军刀.html">
-
-
- Linux网络故障排查的瑞士军刀nc命令
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="3.1.4" data-path="../程序员必知必会的网络命令/Linuxtcpdump使用介绍.html">
-
- <a href="../程序员必知必会的网络命令/Linuxtcpdump使用介绍.html">
-
-
- Linux tcpdump使用详解
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="3.1.5" data-path="../程序员必知必会的网络命令/从抓包的角度分析connect函数的连接过程.html">
-
- <a href="../程序员必知必会的网络命令/从抓包的角度分析connect函数的连接过程.html">
-
-
- 从抓包的角度分析connect函数的连接过程
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="3.1.6" data-path="../程序员必知必会的网络命令/服务器开发中网络数据分析与故障排查经验漫谈.html">
-
- <a href="../程序员必知必会的网络命令/服务器开发中网络数据分析与故障排查经验漫谈.html">
-
-
- 服务器开发中网络数据分析与故障排查经验漫谈
-
- </a>
-
-
- </li>
-
- </ul>
-
- </li>
-
-
-
- <li class="header">Part II</li>
-
-
-
- <li class="chapter " data-level="4.1" data-path="../高性能服务器框架设计/">
-
- <a href="../高性能服务器框架设计/">
-
-
- 高性能服务器框架设计
-
- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="4.1.1" data-path="../高性能服务器框架设计/主线程与工作线程的分工.html">
-
- <a href="../高性能服务器框架设计/主线程与工作线程的分工.html">
-
-
- 主线程与工作线程的分工
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.2" data-path="../高性能服务器框架设计/Reactor模式.html">
-
- <a href="../高性能服务器框架设计/Reactor模式.html">
-
-
- Reactor模式
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.3" data-path="../高性能服务器框架设计/实例：一个服务器程序的架构介绍.html">
-
- <a href="../高性能服务器框架设计/实例：一个服务器程序的架构介绍.html">
-
-
- 实例：一个服务器程序的架构介绍
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.4" data-path="../高性能服务器框架设计/错误码系统的设计.html">
-
- <a href="../高性能服务器框架设计/错误码系统的设计.html">
-
-
- 错误码系统的设计
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.5" data-path="../高性能服务器框架设计/日志系统的设计.html">
-
- <a href="../高性能服务器框架设计/日志系统的设计.html">
-
-
- 日志系统的设计
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.6" data-path="../高性能服务器框架设计/如何设计断线自动重连机制.html">
-
- <a href="../高性能服务器框架设计/如何设计断线自动重连机制.html">
-
-
- 如何设计断线自动重连机制
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.7" data-path="../高性能服务器框架设计/心跳包机制设计详解.html">
-
- <a href="../高性能服务器框架设计/心跳包机制设计详解.html">
-
-
- 心跳包机制设计详解
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.8" data-path="../高性能服务器框架设计/业务数据处理一定要单独开线程吗.html">
-
- <a href="../高性能服务器框架设计/业务数据处理一定要单独开线程吗.html">
-
-
- 业务数据处理一定要单独开线程吗
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.9" data-path="../高性能服务器框架设计/C++高性能服务器网络框架设计细节.html">
-
- <a href="../高性能服务器框架设计/C++高性能服务器网络框架设计细节.html">
-
-
- C++ 高性能服务器网络框架设计细节
-
- </a>
-
-
- </li>
-
- </ul>
-
- </li>
-
-
-
- <li class="divider"></li>
-
-
-
- <li class="chapter " data-level="5.1" data-path="../服务器开发案例实战/">
-
- <a href="../服务器开发案例实战/">
-
-
- 服务器开发案例实战
-
- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="5.1.1" data-path="../服务器开发案例实战/从零实现一个http服务器.html">
-
- <a href="../服务器开发案例实战/从零实现一个http服务器.html">
-
-
- 从零实现一个http服务器
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.2" data-path="../服务器开发案例实战/从零实现一款12306刷票软件.html">
-
- <a href="../服务器开发案例实战/从零实现一款12306刷票软件.html">
-
-
- 从零实现一款12306刷票软件
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.3" data-path="../服务器开发案例实战/从零实现一个邮件收发客户端.html">
-
- <a href="../服务器开发案例实战/从零实现一个邮件收发客户端.html">
-
-
- 从零实现一个邮件收发客户端
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.4" data-path="../服务器开发案例实战/从零开发一个WebSocket服务器.html">
-
- <a href="../服务器开发案例实战/从零开发一个WebSocket服务器.html">
-
-
- 从零开发一个WebSocket服务器
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.5" data-path="../服务器开发案例实战/1从一款多人联机实时对战游戏开始.html">
-
- <a href="../服务器开发案例实战/1从一款多人联机实时对战游戏开始.html">
-
-
- 从零学习开源项目系列（一） 从一款多人联机实时对战游戏开始
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.6" data-path="../服务器开发案例实战/2最后一战概况.html">
-
- <a href="../服务器开发案例实战/2最后一战概况.html">
-
-
- 从零学习开源项目系列（二） 最后一战概况
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.7" data-path="../服务器开发案例实战/3CSBattleMgr服务源码研究.html">
-
- <a href="../服务器开发案例实战/3CSBattleMgr服务源码研究.html">
-
-
- 从零学习开源项目系列（三） CSBattleMgr服务源码研究
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.8" data-path="../服务器开发案例实战/4LogServer源码探究.html">
-
- <a href="../服务器开发案例实战/4LogServer源码探究.html">
-
-
- 从零学习开源项目系列（四）LogServer源码探究
-
- </a>
-
-
- </li>
-
- </ul>
-
- </li>
-
-
-
- <li class="header">Part III</li>
-
-
-
- <li class="chapter " data-level="6.1" data-path="../TeamTalk源码解析/">
-
- <a href="../TeamTalk源码解析/">
-
-
- TeamTalk IM源码分析
-
- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="6.1.1" data-path="../TeamTalk源码解析/01TeamTalk介绍.html">
-
- <a href="../TeamTalk源码解析/01TeamTalk介绍.html">
-
-
- 01 TeamTalk介绍
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.2" data-path="../TeamTalk源码解析/02服务器端的程序的编译与部署.html">
-
- <a href="../TeamTalk源码解析/02服务器端的程序的编译与部署.html">
-
-
- 02 服务器端的程序的编译与部署
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.3" data-path="../TeamTalk源码解析/03服务器端的程序架构介绍.html">
-
- <a href="../TeamTalk源码解析/03服务器端的程序架构介绍.html">
-
-
- 03 服务器端的程序架构介绍
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.4" data-path="../TeamTalk源码解析/04服务器端db_proxy_server源码分析.html">
-
- <a href="../TeamTalk源码解析/04服务器端db_proxy_server源码分析.html">
-
-
- 04 服务器端db_proxy_server源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.5" data-path="../TeamTalk源码解析/05服务器端msg_server源码分析.html">
-
- <a href="../TeamTalk源码解析/05服务器端msg_server源码分析.html">
-
-
- 05 服务器端msg_server源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.6" data-path="../TeamTalk源码解析/06服务器端login_server源码分析.html">
-
- <a href="../TeamTalk源码解析/06服务器端login_server源码分析.html">
-
-
- 06 服务器端login_server源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.7" data-path="../TeamTalk源码解析/07服务器端msfs源码分析.html">
-
- <a href="../TeamTalk源码解析/07服务器端msfs源码分析.html">
-
-
- 07 服务器端msfs源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.8" data-path="../TeamTalk源码解析/08服务器端file_server源码分析.html">
-
- <a href="../TeamTalk源码解析/08服务器端file_server源码分析.html">
-
-
- 08 服务器端file_server源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.9" data-path="../TeamTalk源码解析/09服务器端route_server源码分析.html">
-
- <a href="../TeamTalk源码解析/09服务器端route_server源码分析.html">
-
-
- 09 服务器端route_server源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.10" data-path="../TeamTalk源码解析/10开放一个TeamTalk测试服务器地址和几个测试账号.html">
-
- <a href="../TeamTalk源码解析/10开放一个TeamTalk测试服务器地址和几个测试账号.html">
-
-
- 10 开放一个TeamTalk测试服务器地址和几个测试账号
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.11" data-path="../TeamTalk源码解析/11pc客户端源码分析.html">
-
- <a href="../TeamTalk源码解析/11pc客户端源码分析.html">
-
-
- 11 pc客户端源码分析
-
- </a>
-
-
- </li>
-
- </ul>
-
- </li>
-
-
-
- <li class="divider"></li>
-
-
-
- <li class="chapter " data-level="7.1" data-path="../libevent源码深度剖析/">
-
- <a href="../libevent源码深度剖析/">
-
-
- libevent源码深度剖析
-
- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="7.1.1" data-path="../libevent源码深度剖析/libevent源码深度剖析01.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析01.html">
-
-
- libevent源码深度剖析01
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.2" data-path="../libevent源码深度剖析/libevent源码深度剖析02.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析02.html">
-
-
- libevent源码深度剖析02
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.3" data-path="../libevent源码深度剖析/libevent源码深度剖析03.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析03.html">
-
-
- libevent源码深度剖析03
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.4" data-path="../libevent源码深度剖析/libevent源码深度剖析04.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析04.html">
-
-
- libevent源码深度剖析04
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.5" data-path="../libevent源码深度剖析/libevent源码深度剖析05.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析05.html">
-
-
- libevent源码深度剖析05
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.6" data-path="../libevent源码深度剖析/libevent源码深度剖析06.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析06.html">
-
-
- libevent源码深度剖析06
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.7" data-path="../libevent源码深度剖析/libevent源码深度剖析07.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析07.html">
-
-
- libevent源码深度剖析07
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.8" data-path="../libevent源码深度剖析/libevent源码深度剖析08.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析08.html">
-
-
- libevent源码深度剖析08
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.9" data-path="../libevent源码深度剖析/libevent源码深度剖析09.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析09.html">
-
-
- libevent源码深度剖析09
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.10" data-path="../libevent源码深度剖析/libevent源码深度剖析10.html">
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- libevent源码深度剖析10
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- leveldb源码分析
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- leveldb源码分析2
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- leveldb源码分析3
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- leveldb源码分析4
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- leveldb源码分析5
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- leveldb源码分析6
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- leveldb源码分析7
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- leveldb源码分析8
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- leveldb源码分析11
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- <li class="chapter " data-level="7.2.12" data-path="../leveldb源码分析/leveldb源码分析12.html">
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- leveldb源码分析12
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- <li class="chapter " data-level="7.2.13" data-path="../leveldb源码分析/leveldb源码分析13.html">
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- leveldb源码分析13
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- <li class="chapter " data-level="7.2.14" data-path="../leveldb源码分析/leveldb源码分析14.html">
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- leveldb源码分析14
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- </a>
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- <li class="chapter " data-level="7.2.15" data-path="../leveldb源码分析/leveldb源码分析15.html">
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- leveldb源码分析15
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- </a>
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- <li class="chapter " data-level="7.2.16" data-path="../leveldb源码分析/leveldb源码分析16.html">
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- leveldb源码分析16
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- </a>
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- <li class="chapter " data-level="7.2.17" data-path="../leveldb源码分析/leveldb源码分析17.html">
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- leveldb源码分析17
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- </a>
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- <li class="chapter " data-level="7.2.18" data-path="../leveldb源码分析/leveldb源码分析18.html">
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- leveldb源码分析18
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- <li class="chapter " data-level="7.2.19" data-path="../leveldb源码分析/leveldb源码分析19.html">
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- leveldb源码分析19
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- </a>
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- <li class="chapter " data-level="7.2.20" data-path="../leveldb源码分析/leveldb源码分析20.html">
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- leveldb源码分析20
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- </a>
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- <li class="chapter " data-level="7.2.21" data-path="../leveldb源码分析/leveldb源码分析21.html">
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- leveldb源码分析21
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- <li class="chapter " data-level="7.2.22" data-path="../leveldb源码分析/leveldb源码分析22.html">
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- leveldb源码分析22
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- Memcached源码分析
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- <ul class="articles">
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- <li class="chapter " data-level="8.1.1" data-path="00服务器资源调整.html">
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- 00 服务器资源调整
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- <li class="chapter " data-level="8.1.2" data-path="01初始化参数解析.html">
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- 01 初始化参数解析
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- <li class="chapter " data-level="8.1.3" data-path="02网络监听的建立.html">
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- 02 网络监听的建立
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- <li class="chapter " data-level="8.1.4" data-path="03网络连接建立.html">
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- <a href="03网络连接建立.html">
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- 03 网络连接建立
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- </a>
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- </li>
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- <li class="chapter " data-level="8.1.5" data-path="04内存初始化.html">
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- 04 内存初始化
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- <li class="chapter active" data-level="8.1.6" data-path="05资源初始化.html">
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- 05 资源初始化
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- <li class="chapter " data-level="8.1.7" data-path="06get过程.html">
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- 06 get过程
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- <li class="chapter " data-level="8.1.8" data-path="07cas属性.html">
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- <a href="07cas属性.html">
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- 07 cas属性
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- </a>
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- </li>
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- <li class="chapter " data-level="8.1.9" data-path="08内存池.html">
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- <a href="08内存池.html">
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- 08 内存池
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- </a>
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- </li>
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- <li class="chapter " data-level="8.1.10" data-path="09连接队列.html">
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- <a href="09连接队列.html">
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- 09 连接队列
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- </a>
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- </li>
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- <li class="chapter " data-level="8.1.11" data-path="10Hash表操作.html">
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- <a href="10Hash表操作.html">
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- 10 Hash表操作
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- </a>
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- </li>
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- <li class="chapter " data-level="8.1.12" data-path="12set操作.html">
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- <a href="12set操作.html">
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- 12 set操作
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- </a>
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- </li>
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- <li class="chapter " data-level="8.1.13" data-path="13do_item_alloc操作.html">
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- <a href="13do_item_alloc操作.html">
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- 13 do_item_alloc操作
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- </a>
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- <li class="chapter " data-level="8.1.14" data-path="14item结构.html">
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- <a href="14item结构.html">
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- 14 item结构
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- <li class="chapter " data-level="8.1.15" data-path="15Hash表扩容.html">
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- 15 Hash表扩容
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- 16 线程交互
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- <li class="chapter " data-level="8.1.17" data-path="17状态机.html">
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- 17 状态机
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- 1 游戏服务器开发的基本体系与服务器端开发的一些建议
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- <a href="../游戏开发专题/2网络游戏服务器开发框架设计介绍.html">
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- 2 网络游戏服务器开发框架设计介绍
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- </a>
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- <li class="chapter " data-level="9.1.3" data-path="../游戏开发专题/3游戏后端开发需要掌握的知识.html">
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- <a href="../游戏开发专题/3游戏后端开发需要掌握的知识.html">
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- 3 游戏后端开发需要掌握的知识
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- <li class="chapter " data-level="9.1.4" data-path="../游戏开发专题/4关于游戏服务端架构的整理.html">
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- <a href="../游戏开发专题/4关于游戏服务端架构的整理.html">
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- 4 关于游戏服务端架构的整理
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- </a>
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- <li class="chapter " data-level="9.1.5" data-path="../游戏开发专题/5各类游戏对应的服务端架构.html">
-
- <a href="../游戏开发专题/5各类游戏对应的服务端架构.html">
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-
- 5 各类游戏对应的服务端架构
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="9.1.6" data-path="../游戏开发专题/6从腾讯QQgame高性能服务器集群架构看“分而治之”与“自治”等分布式架构设计原则.html">
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- <a href="../游戏开发专题/6从腾讯QQgame高性能服务器集群架构看“分而治之”与“自治”等分布式架构设计原则.html">
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- 6 从腾讯QQgame高性能服务器集群架构看“分而治之”与“自治”等分布式架构设计原则
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- </a>
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-
- </li>
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- <li class="chapter " data-level="9.1.7" data-path="../游戏开发专题/7QQ游戏百万人同时在线服务器架构实现.html">
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- <a href="../游戏开发专题/7QQ游戏百万人同时在线服务器架构实现.html">
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- 7 QQ游戏百万人同时在线服务器架构实现
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- </a>
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-
- </li>
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- <li class="chapter " data-level="9.1.8" data-path="../游戏开发专题/8大型多人在线游戏服务器架构设计.html">
-
- <a href="../游戏开发专题/8大型多人在线游戏服务器架构设计.html">
-
-
- 8 大型多人在线游戏服务器架构设计
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="9.1.9" data-path="../游戏开发专题/9百万用户级游戏服务器架构设计.html">
-
- <a href="../游戏开发专题/9百万用户级游戏服务器架构设计.html">
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-
- 9 百万用户级游戏服务器架构设计
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="9.1.10" data-path="../游戏开发专题/10十万在线的WebGame的数据库设计思路.html">
-
- <a href="../游戏开发专题/10十万在线的WebGame的数据库设计思路.html">
-
-
- 10 十万在线的WebGame的数据库设计思路
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="9.1.11" data-path="../游戏开发专题/11一种高性能网络游戏服务器架构设计.html">
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- <a href="../游戏开发专题/11一种高性能网络游戏服务器架构设计.html">
-
-
- 11 一种高性能网络游戏服务器架构设计
-
- </a>
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-
- </li>
-
- <li class="chapter " data-level="9.1.12" data-path="../游戏开发专题/12经典游戏服务器端架构概述.html">
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- <a href="../游戏开发专题/12经典游戏服务器端架构概述.html">
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- 12 经典游戏服务器端架构概述
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- </a>
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-
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- <li class="chapter " data-level="9.1.13" data-path="../游戏开发专题/13游戏跨服架构进化之路.html">
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- <a href="../游戏开发专题/13游戏跨服架构进化之路.html">
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- 13 游戏跨服架构进化之路
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- </a>
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- </ul>
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- <li class="header">Part IV</li>
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- <li class="chapter " data-level="10.1" data-path="../程序员面试题精讲/">
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- <a href="../程序员面试题精讲/">
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- 程序员面试题精讲
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- <a href="../程序员面试题精讲/腾讯后台开发实习生技能要求.html">
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- 腾讯后台开发实习生技能要求
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- </a>
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- </li>
-
- <li class="chapter " data-level="10.1.2" data-path="../程序员面试题精讲/聊聊如何拿大厂的offer.html">
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- <a href="../程序员面试题精讲/聊聊如何拿大厂的offer.html">
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- 聊聊如何拿大厂的 offer
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- </a>
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- <li class="chapter " data-level="10.1.3" data-path="../程序员面试题精讲/网络通信题目集锦.html">
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- <a href="../程序员面试题精讲/网络通信题目集锦.html">
-
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- 网络通信题目集锦
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- </a>
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- <li class="chapter " data-level="10.1.4" data-path="../程序员面试题精讲/我面试后端开发经理的经历.html">
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- <a href="../程序员面试题精讲/我面试后端开发经理的经历.html">
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- 我面试后端开发经理的经历
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- <li class="chapter " data-level="10.1.5" data-path="../程序员面试题精讲/LinuxCC++后端开发面试问哪些问题.html">
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- <a href="../程序员面试题精讲/LinuxCC++后端开发面试问哪些问题.html">
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- Linux C/C++后端开发面试问哪些问题
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- <div id="anchor-navigation-ex-navbar"><i class="fa fa-navicon"></i><ul><li><span class="title-icon "></span><a href="#memcached源码阅读五-资源初始化"><b></b>Memcached源码阅读五 资源初始化</a></li></ul></div><h1 id="memcached源码阅读五-资源初始化"><a name="memcached源码阅读五-资源初始化" class="anchor-navigation-ex-anchor" href="#memcached源码阅读五-资源初始化"><i class="fa fa-link" aria-hidden="true"></i></a>Memcached源码阅读五 资源初始化</h1>
- <p><code>Memcached</code>内部有<strong>hash表，各种统计信息，工作线程，网络，连接，内存结构</strong>等，在memcached启动时(执行main函数)，会对这些资源进行初始化的，网络和内存的初始化操作放到后续分析，这次分析hash表，统计信息，工作线程，网络连接的初始化过程。</p>
- <p><strong>1 hash表的初始化</strong></p>
- <pre class="language-"><code>//hash表的初始化，传入的参数是启动时传入的
- assoc_init(settings.hashpower_init);
- //hashsize的实现
- #define hashsize(n) ((ub4)1<<(n))
- //主hash表结构定义，在hash表扩容时，会有次hash表，所以有主次hash表区分，该结构是指针的指针，也即相当于数组指针
- static item** primary_hashtable = 0;
- void assoc_init(const int hashtable_init) {
- if (hashtable_init) {
- //如果设置了初始化参数，则按设置的参数进行初始化
- hashpower = hashtable_init;
- }
- //hashpower的默认值为16,如果未设置新值，则按默认值进行初始化
- primary_hashtable = calloc(hashsize(hashpower), sizeof(void *));
- if (! primary_hashtable) {
- fprintf(stderr, "Failed to init hashtable.\n");
- exit(EXIT_FAILURE);
- }
- STATS_LOCK();//全局统计信息加锁，保证数据同步
- stats.hash_power_level = hashpower;
- stats.hash_bytes = hashsize(hashpower) * sizeof(void *);
- STATS_UNLOCK();
- }
- </code></pre><p><strong>2 统计信息的初始化</strong></p>
- <p><code>Memcached</code>内部有很多全局的统计信息，用于实时获取各个资源的使用情况，后面将会看到，所有对统计信息的更新都需要加锁，而这些信息的更新是和Memcached的操作次数同数量级的，所以，在一定程度来说，这些统计信息对<strong>性能</strong>有影响。</p>
- <p>stats结构是对统计信息的一个抽象，各个字段都比较好理解，不做解释。</p>
- <pre class="language-"><code>struct stats {
- pthread_mutex_t mutex;
- unsigned int curr_items;
- unsigned int total_items;
- uint64_t curr_bytes;
- unsigned int curr_conns;
- unsigned int total_conns;
- uint64_t rejected_conns;
- unsigned int reserved_fds;
- unsigned int conn_structs;
- uint64_t get_cmds;
- uint64_t set_cmds;
- uint64_t touch_cmds;
- uint64_t get_hits;
- uint64_t get_misses;
- uint64_t touch_hits;
- uint64_t touch_misses;
- uint64_t evictions;
- uint64_t reclaimed;
- time_t started; /* when the process was started */
- bool accepting_conns; /* whether we are currently accepting */
- uint64_t listen_disabled_num;
- unsigned int hash_power_level; /* Better hope it's not over 9000 */
- uint64_t hash_bytes; /* size used for hash tables */
- bool hash_is_expanding; /* If the hash table is being expanded */
- uint64_t expired_unfetched; /* items reclaimed but never touched */
- uint64_t evicted_unfetched; /* items evicted but never touched */
- bool slab_reassign_running; /* slab reassign in progress */
- uint64_t slabs_moved; /* times slabs were moved around */
- };
- </code></pre><p>统计信息的初始化也就是对stats变量的一个初始化。</p>
- <pre class="language-"><code>//全局对象的定义
- struct stats stats;
- //全局变量的初始化，该全局变量在memcached启动之后，一直使用
- static void stats_init(void)
- {
- stats.curr_items = stats.total_items = stats.curr_conns =
- stats.total_conns = stats.conn_structs = 0;
- stats.get_cmds = stats.set_cmds = stats.get_hits = stats.get_misses =
- stats.evictions = stats.reclaimed = 0;
- stats.touch_cmds = stats.touch_misses = stats.touch_hits =
- stats.rejected_conns = 0;
- stats.curr_bytes = stats.listen_disabled_num = 0;
- stats.hash_power_level = stats.hash_bytes = stats.hash_is_expanding = 0;
- stats.expired_unfetched = stats.evicted_unfetched = 0;
- stats.slabs_moved = 0;
- stats.accepting_conns = true; /* assuming we start in this state. */
- stats.slab_reassign_running = false;
- /* make the time we started always be 2 seconds before we really
- did, so time(0) - time.started is never zero. if so, things
- like 'settings.oldest_live' which act as booleans as well as
- values are now false in boolean context... */
- process_started = time(0) - 2;
- stats_prefix_init();
- }
- </code></pre><p><strong>3 工作线程的初始化</strong></p>
- <p><code>Memcached</code>采用了典型的<code>Master-Worker</code>的线程模式，Master就是由main线程来充当，而Worker线程则是通过Pthread创建的。</p>
- <pre class="language-"><code>//传入线程个数和libevent的main_base实例
- thread_init(settings.num_threads, main_base);
- //工作线程初始化
- void thread_init(int nthreads, struct event_base *main_base) {
- int i;
- int power;
- //初始化各种锁和条件变量
- pthread_mutex_init(&cache_lock, NULL);
- pthread_mutex_init(&stats_lock, NULL);
- pthread_mutex_init(&init_lock, NULL);
- pthread_cond_init(&init_cond, NULL);
- pthread_mutex_init(&cqi_freelist_lock, NULL);
- cqi_freelist = NULL;
- //Memcached对hash桶的锁采用分段锁，按线程个数来分段，默认总共是1<<16个hash桶，而锁的数目是1<<power个
- /* Want a wide lock table, but don't waste memory */
- if (nthreads < 3) {
- power = 10;
- } else if (nthreads < 4) {
- power = 11;
- } else if (nthreads < 5) {
- power = 12;
- } else {
- /* 8192 buckets, and central locks don't scale much past 5 threads */
- power = 13;
- }
- item_lock_count = hashsize(power);
- //申请1<<power个pthread_mutex_t锁，保存在item_locks数组。
- item_locks = calloc(item_lock_count, sizeof(pthread_mutex_t));
- if (! item_locks) {
- perror("Can't allocate item locks");
- exit(1);
- }
- //对这些锁进行初始化，这部分可参考APUE的线程部分
- for (i = 0; i < item_lock_count; i++) {
- pthread_mutex_init(&item_locks[i], NULL);
- }
- /*创建线程的局部变量，该局部变量的名称为item_lock_type_key,用于保存主hash表所持有的锁的类型
- 主hash表在进行扩容时，该锁类型会变为全局的锁，否则(不在扩容过程中)，则是局部锁*/
- pthread_key_create(&item_lock_type_key, NULL);
- pthread_mutex_init(&item_global_lock, NULL);
- //申请nthreds个工作线程,LIBEVENT_THREAD是Memcached内部对工作线程的一个封装
- threads = calloc(nthreads, sizeof(LIBEVENT_THREAD));
- if (! threads) {
- perror("Can't allocate thread descriptors");
- exit(1);
- }
- /*分发线程的初始化,分发线程的base为main_base
- 线程id为main线程的线程id*/
- dispatcher_thread.base = main_base;
- dispatcher_thread.thread_id = pthread_self();
- //工作线程的初始化,工作线程和主线程(main线程)是通过pipe管道进行通信的
- for (i = 0; i < nthreads; i++) {
- int fds[2];
- if (pipe(fds)) {//初始化pipe管道
- perror("Can't create notify pipe");
- exit(1);
- }
- threads[i].notify_receive_fd = fds[0];//读管道绑定到工作线程的接收消息的描述符
- threads[i].notify_send_fd = fds[1];//写管道绑定到工作线程的发送消息的描述符
- setup_thread(&threads[i]);//添加工作线程到libevent中
- /* Reserve three fds for the libevent base, and two for the pipe */
- stats.reserved_fds += 5;//统计信息更新
- }
- //创建工作线程
- for (i = 0; i < nthreads; i++) {
- create_worker(worker_libevent, &threads[i]);
- }
- //等待所有工作线程创建完毕
- pthread_mutex_lock(&init_lock);
- wait_for_thread_registration(nthreads);
- pthread_mutex_unlock(&init_lock);
- }
- //Memcached内部工作线程的封装
- typedef struct {
- pthread_t thread_id; //线程ID
- struct event_base *base; //libevent的不是线程安全的，每个工作线程持有一个libevent实例，用于pipe管道通信和socket通信
- struct event notify_event; //用于监听pipe管道的libevent事件
- int notify_receive_fd; //接收pipe管道消息描述符
- int notify_send_fd; //发送pipe管道消息描述符
- struct thread_stats stats; //每个线程对应的统计信息
- struct conn_queue *new_conn_queue; //每个线程都有一个工作队列，主线程接受的连接，挂载到该消息队列中
- cache_t *suffix_cache; //后缀cache
- uint8_t item_lock_type; //线程操作hash表持有的锁类型，有局部锁和全局锁
- } LIBEVENT_THREAD;
- //分发线程的封装
- typedef struct {
- pthread_t thread_id; //线程id
- struct event_base *base; //libevent实例
- } LIBEVENT_DISPATCHER_THREAD;
- //工作线程绑定到libevent实例
- static void setup_thread(LIBEVENT_THREAD *me) {
- me->base = event_init();//创建libevent实例
- if (! me->base) {
- fprintf(stderr, "Can't allocate event base\n");
- exit(1);
- }
- //创建管道读的libevent事件，事件的回调函数处理具体的业务信息，关于回调函数的处理，后续分析
- event_set(&me->notify_event, me->notify_receive_fd,
- EV_READ | EV_PERSIST, thread_libevent_process, me);
- event_base_set(me->base, &me->notify_event);//设置libevent实例
- //添加事件到libevent中
- if (event_add(&me->notify_event, 0) == -1) {
- fprintf(stderr, "Can't monitor libevent notify pipe\n");
- exit(1);
- }
- //创建消息队列，用于接受主线程连接
- me->new_conn_queue = malloc(sizeof(struct conn_queue));
- if (me->new_conn_queue == NULL) {
- perror("Failed to allocate memory for connection queue");
- exit(EXIT_FAILURE);
- }
- cq_init(me->new_conn_queue);//消息队列初始化
- if (pthread_mutex_init(&me->stats.mutex, NULL) != 0) {
- perror("Failed to initialize mutex");
- exit(EXIT_FAILURE);
- }
- //创建线程的后缀cache,没搞懂这个cache有什么作用。
- me->suffix_cache = cache_create("suffix", SUFFIX_SIZE, sizeof(char*),
- NULL, NULL);
- if (me->suffix_cache == NULL) {
- fprintf(stderr, "Failed to create suffix cache\n");
- exit(EXIT_FAILURE);
- }
- }
- //创建工作线程
- static void create_worker(void *(*func)(void *), void *arg) {
- pthread_t thread;
- pthread_attr_t attr;
- int ret;
- pthread_attr_init(&attr);//Posix线程部分，线程属性初始化
- //通过pthread_create创建线程，线程处理函数是通过外部传入的处理函数为worker_libevent
- if ((ret = pthread_create(&thread, &attr, func, arg)) != 0) {
- fprintf(stderr, "Can't create thread: %s\n",
- strerror(ret));
- exit(1);
- }
- }
- //线程处理函数
- static void *worker_libevent(void *arg) {
- LIBEVENT_THREAD *me = arg;
- //默认的hash表的锁为局部锁
- me->item_lock_type = ITEM_LOCK_GRANULAR;
- pthread_setspecific(item_lock_type_key, &me->item_lock_type);//设定线程的属性
- //用于控制工作线程初始化，通过条件变量来控制
- register_thread_initialized();
- //工作线程的libevent实例启动
- event_base_loop(me->base, 0);
- return NULL;
- }
- //阻塞工作线程
- static void wait_for_thread_registration(int nthreads) {
- while (init_count < nthreads) {
- pthread_cond_wait(&init_cond, &init_lock);//在条件变量init_cond上面阻塞，阻塞个数为nthreads-init_count
- }
- }
- //唤醒工作线程
- static void register_thread_initialized(void) {
- pthread_mutex_lock(&init_lock);
- init_count++;
- pthread_cond_signal(&init_cond);
- pthread_mutex_unlock(&init_lock);
- }
- //每个线程持有的统计信息
- struct thread_stats {
- pthread_mutex_t mutex;
- uint64_t get_cmds;
- uint64_t get_misses;
- uint64_t touch_cmds;
- uint64_t touch_misses;
- uint64_t delete_misses;
- uint64_t incr_misses;
- uint64_t decr_misses;
- uint64_t cas_misses;
- uint64_t bytes_read;
- uint64_t bytes_written;
- uint64_t flush_cmds;
- uint64_t conn_yields; /* # of yields for connections (-R option)*/
- uint64_t auth_cmds;
- uint64_t auth_errors;
- struct slab_stats slab_stats[MAX_NUMBER_OF_SLAB_CLASSES];
- };
- //每个slab的统计信息
- struct slab_stats {
- uint64_t set_cmds;
- uint64_t get_hits;
- uint64_t touch_hits;
- uint64_t delete_hits;
- uint64_t cas_hits;
- uint64_t cas_badval;
- uint64_t incr_hits;
- uint64_t decr_hits;
- };
- </code></pre><p><strong>4 连接的初始化</strong></p>
- <pre class="language-"><code>static conn **freeconns;//空闲连接列表
- //连接初始化
- static void conn_init(void)
- {
- freetotal = 200;//空闲连接总数
- freecurr = 0;//当前空闲的索引
- //申请200个空间
- if ((freeconns = calloc(freetotal, sizeof(conn *))) == NULL)
- {
- fprintf(stderr, "Failed to allocate connection structures\n");
- }
- return;
- }
- </code></pre><footer class="page-footer"><span class="copyright">如需下载本站全部技术文章，可以在【高性能服务器开发】公众号回复关键字“文章下载”即可。</span><span class="footer-modification">最近更新时间：
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