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README.md
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README.md
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# coder-kung-fu
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开发内功修炼
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**公众号: 开发内功修炼**
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在我十年的工作生涯中,我虽然从事的是应用层的开发,但仍然一直保持着对底层的好奇。把工作中遇到的一些问题,进行深度思考。总结出来,在这里分享给有缘的你!
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持续更新ing...
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## 一、网络篇
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**1.1 内核收包原理**
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- [1.图解Linux网络包接收过程](https://mp.weixin.qq.com/s/GoYDsfy9m0wRoXi_NCfCmg)
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- [2.Linux网络包接收过程的监控与调优](https://mp.weixin.qq.com/s/6iQ-OhEbQJbEcgi9kakSjg)
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**1.2 TCP连接内存开销分析**
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- [4.漫画 | 一台Linux服务器最多能支撑多少个TCP连接](https://mp.weixin.qq.com/s/Lkyj42NtvqEj63DoCY5btQ)
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- [5.漫画 | 理解了TCP连接的实现以后,客户端的并发也爆发了!](https://mp.weixin.qq.com/s/ta6upubg0o1w03YGUo8Trg)
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- [6.漫画 | 花了七天时间测试,我彻底搞明白了 TCP 的这些内存开销!](https://mp.weixin.qq.com/s/BwddYkVLSYlkKFNeA-NUVg)
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**1.3 TCP连接时间开销**
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- [1.聊聊TCP连接耗时的那些事儿](https://mp.weixin.qq.com/s/wXyerOFoibRsaBmbl224gw)
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## 二、硬盘篇
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**2.1 硬件工作原理**
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- [1.磁盘开篇:扒开机械硬盘坚硬的外衣!](https://mp.weixin.qq.com/s/OqhwSI4WsEyZlBhkFGPUlg)
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- [2.磁盘分区也是隐含了技术技巧的](https://mp.weixin.qq.com/s/4HwUxy-4FClgIIei6JAzqw)
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- [3.我们怎么解决机械硬盘既慢又容易坏的问题?](https://mp.weixin.qq.com/s/n9Hf3Utm4NFp3jNRTgZNwg)
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- [4.拆解固态硬盘结构](https://mp.weixin.qq.com/s/6aPHMmz1kmiaBABhy8pF1Q)
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**2.2 文件系统浅析**
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- [1.新建一个空文件占用多少磁盘空间?](https://mp.weixin.qq.com/s/9YeUEnRnegplftpKlW4ZCA)
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- [2.只有1个字节的文件实际占用多少磁盘空间](https://mp.weixin.qq.com/s/WE6BodR_q0GSKks_TgYL1w)
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- [3.文件过多时ls命令为什么会卡住?](https://mp.weixin.qq.com/s/g-fFoYsBJkonV3ezdGDJKA)
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- [4.理解格式化原理](https://mp.weixin.qq.com/s/DobymgQ-TRXrO32wjf2fWQ)
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**2.3 文件读写性能**
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- [1.read文件一个字节实际会发生多大的磁盘IO?](https://zhuanlan.zhihu.com/p/138371910)
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- [2.write文件一个字节后何时发起写磁盘IO?](https://zhuanlan.zhihu.com/p/142441899)
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- [3.机械硬盘随机IO慢的超乎你的想象](https://mp.weixin.qq.com/s/qz57uPtFaoQ_5z59NSBEUQ)
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- [4.搭载固态硬盘的服务器究竟比搭机械硬盘快多少?](https://mp.weixin.qq.com/s/4CKPLpEDDbIyqJGxYDAUeA)
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## 三、内存篇
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**3.1 硬件工作原理**
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- [1.带你深入理解内存对齐最底层原理](https://mp.weixin.qq.com/s/F0NTfz-3x3UxQeF-GSavRg)
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- [2.内存随机也比顺序访问慢,带你深入理解内存IO过程](https://mp.weixin.qq.com/s/ps8VfGpbL4-xKggM2ywjHw)
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- [3.从DDR到DDR4,内存核心频率其实基本上就没太大的进步](https://mp.weixin.qq.com/s/LRxhKrUOgyCexYN1lOwTyA)
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**3.2 内存性能测试**
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- [1.实际测试内存在顺序IO和随机IO时的访问延时差异](https://mp.weixin.qq.com/s/_-Ar944KlztzmFYdA3JXnQ)
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- [2.揭穿内存厂家“谎言”,实测内存带宽真实表现](https://mp.weixin.qq.com/s/AJjBHCNPWN8YW8v0iXjjig)
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- [3.NUMA架构下的内存访问延迟区别!](https://mp.weixin.qq.com/s/xUZl5wGRVvJI_Hfivg0hVQ)
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- [4.挑战Redis单实例内存最大极限,“遭遇”NUMA陷阱!](https://mp.weixin.qq.com/s/dag1Zp1h4lQfqeUUGz4Ogw)
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**3.3 内存性能优化案例**
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- [1.一次内存性能提升的项目实践](https://mp.weixin.qq.com/s/foJJ2E7_jVgnOeJ9Du6qJg)
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- [2.PHP7内存性能优化的思想精髓](https://mp.weixin.qq.com/s/3DrDb0CY8dUmFUKtuWzhqA)
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## 四、CPU篇
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**4.1 了解CPU硬件*
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- [1.你以为你的多核CPU都是真核吗?多核“假象”](https://mp.weixin.qq.com/s/XX1yh8BTgT256pAnfosQkw)
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- [2.听说你只知内存,而不知缓存?CPU表示很伤心!](https://mp.weixin.qq.com/s/PQTuFZO51an6OAe3WX4BVw)
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- [3.TLB缓存是个神马鬼,如何查看TLB miss?](https://mp.weixin.qq.com/s/mssTS3NN7-w2df1vhYSuYw)
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**4.2 内核CPU开销分析**
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- [1.进程/线程切换究竟需要多少开销?](https://mp.weixin.qq.com/s/uq5s5vwk5vtPOZ30sfNsOg)
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- [2.协程究竟比线程牛在什么地方?](https://mp.weixin.qq.com/s/N4W0-0cP1wlxtLILx3oXpg)
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- [3.软中断会吃掉你多少CPU?](https://mp.weixin.qq.com/s/mlenlX3-6H0shfOIvi8E8g)
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- [4.一次系统调用开销到底有多大?](https://mp.weixin.qq.com/s/2nIDLeMR984_Sdgh01BHIQ)
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- [5.一次简单的php请求redis会有哪些开销?](https://mp.weixin.qq.com/s/yl5EuQ1wEXDuIg4E98QfZA)
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**4.3 用户态CPU开销分析**
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- [1.函数调用太多了会有性能问题吗?](https://mp.weixin.qq.com/s/G30VtOIYjx2Wa54xlO7udw)
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