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C++ Lock-free Hazard Pointer(冒险指针) - C/C++ - 清泛网 - 专注C/C++及内核技术

...每次读取都需要修改引用计数,高并发场景下这样的原子操作也会成为性能瓶颈,毕竟原子加对应的 CPU 指令 lock add 也可以看成是微型锁。 Linux 内核中提供了 RCU 方法,笔者目前对此还没有太多的了解。本文主要介绍 Hazard Pointe...
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Run an OLS regression with Pandas Data Frame

... Jarque-Bera (JB): 0.498 Skew: -0.123 Prob(JB): 0.780 Kurtosis: 1.474 Cond. No. 5.21e+04 ============================================================================== Warnings: [1] The con...
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MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...

...原理 用pt-table-sync修复不一致的数据 描述了工具原理 操作过程 只把过程和用到的东西解释了下,有些参数选项等还需要查阅文档。两台机器都是centos6.5 mysql版本都是5.6 , 由于是线上环境,这里ip和密码等敏感信息修改了下。...
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What's the meaning of “=>” (an arrow formed from equals & greater than) in JavaScript?

...nternal method, and thus can't be instantiated, e.g. var f = a => a; f(123); // 123 new f(); // TypeError: f is not a constructor share | improve this answer | follow ...
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Elegant Python function to convert CamelCase to snake_case?

...er() 'get2_http_response_code' >>> a.sub(r'_\1', 'get2HTTPResponse123Code').lower() 'get2_http_response123_code' >>> a.sub(r'_\1', 'HTTPResponseCode').lower() 'http_response_code' >>> a.sub(r'_\1', 'HTTPResponseCodeXYZ').lower() 'http_response_code_xyz' It all depends on...
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TypeScript function overloading

... ...; var n: number = foo1.bar('baz'); // OK var s: string = foo1.bar(123); // OK var a: number[] = foo1.bar([1,2,3]); // ERROR The actual definition of the function must be singular and perform the appropriate dispatching internally on its arguments. For example, using a class (which ...
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怎么往SetTimer的回调函数传递参数 - C/C++ - 清泛网 - 专注C/C++及内核技术

...息,然后处理之,这个过程有两个参与者,一 个是windows系统,它主要负责投递消息,收不收是用户线程的事,另一个就是用户线程,它主要负责取出消息并处理消息,即使用户线程因为睡眠或者根本 就没有设定消息循环,系统...
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How to round a number to n decimal places in Java

...f.setRoundingMode(RoundingMode.CEILING); for (Number n : Arrays.asList(12, 123.12345, 0.23, 0.1, 2341234.212431324)) { Double d = n.doubleValue(); System.out.println(df.format(d)); } gives the output: 12 123.1235 0.23 0.1 2341234.2125 EDIT: The original answer does not address the acc...
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How to convert wstring into string?

... answered Aug 22 '13 at 7:57 dk123dk123 14k1616 gold badges6060 silver badges7171 bronze badges ...
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REDHAT 6.4 X64下ORACLE 11GR2静默安装 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

...at pacakage.txt ) 输入y 后开始安装。 7 、创建所需要的操作系统用户和组 具体命令 #groupadd -g 5000 oinstall #groupadd -g 5001 dba # useradd -m -g oinstall -G dba oracle # passwd oracle 7、配置oracle 用户的环境变量 其实安装的时候...