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Date
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2020-08-05
47.246.18.165
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ClassC
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2026-01-08
8.38.121.195
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Port 80
HTTP/1.1 301 Moved PermanentlyServer: TengineDate: Thu, 08 Jan 2026 21:09:54 GMTContent-Type: text/htmlContent-Length: 262Connection: keep-aliveLocation: https://oftime.net/Via: ens-cache7.us26,0Timing-Allow-Origin: *EagleId: 0819529b17679065940367786e !DOCTYPE HTML PUBLIC -//IETF//DTD HTML 2.0//EN>html>head>title>301 Moved Permanently/title>/head>body>h1>301 Moved Permanently/h1>p>The requested resource has been assigned a new permanent URI./p>hr/>Powered by Tengine/body>/html>
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itemtypehttp://schema.org/Blog classui-posts>article itempropblogPost itemscopeitemscope itemtypehttps://schema.org/BlogPosting classui-post>meta itempropmainEntityOfPage content/2024/02/20/python/> header itempropname headline classui-post-title>a href/2024/02/20/python/ classnav-link>AI 时代写给财务的 Python 手册/a>/header> p itempropdescription classui-post-summary> Notion Site: AI 时代写给财务的 Python 手册 (notion.site)oftime.xyz 备用: AI 时代写给财务的 Python 手册 (oftime ... /p> footer>div itemproppublisher author itemtypehttp://schema.org/Person itemscopeitemscope classui-post-meta ui-post-author>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-navigation>polygon points3 11 22 2 13 21 11 13 3 11>/polygon>/svg> span itempropname>徐徐/span> span itempropaddress> in Beijing /span>/div> div classui-post-meta ui-post-date>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-clock>circle cx12 cy12 r10>/circle>polyline points12 6 12 12 16 14>/polyline>/svg> time pubdate itempropdatePublished datetime2024-02-20T00:00:00.000Z> 2024-02-20 /time>/div> div itempropkeywords classui-post-meta ui-post-tag>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-tag>path dM20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z>/path>line x17 y17 x27 y27>/line>/svg> a href/tag/Python> Python /a>/div>/footer>/article>article itempropblogPost itemscopeitemscope itemtypehttps://schema.org/BlogPosting classui-post>meta itempropmainEntityOfPage content/2021/11/07/process/> header itempropname headline classui-post-title>a href/2021/11/07/process/ classnav-link>进程是如何创建的？/a>/header> p itempropdescription classui-post-summary> 这次简单总结探究一下 Go 对进程相关操作的封装。Go 中通过名称或者路径可以很简单的启动一个进程（命令）：ret, _ : exec.Command("bash", "-c", "ls -a -l -h").Output()先来看看 Go 创建运行一个进程大致流程：将命令、参数，以及环境变量、要运行的工作目录等数据，传递给 `os.StartProce ... /p> footer>div itemproppublisher author itemtypehttp://schema.org/Person itemscopeitemscope classui-post-meta ui-post-author>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-navigation>polygon points3 11 22 2 13 21 11 13 3 11>/polygon>/svg> span itempropname>徐徐/span> span itempropaddress> in Beijing /span>/div> div classui-post-meta ui-post-date>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-clock>circle cx12 cy12 r10>/circle>polyline points12 6 12 12 16 14>/polyline>/svg> time pubdate itempropdatePublished datetime2021-11-07T00:00:00.000Z> 2021-11-07 /time>/div> div itempropkeywords classui-post-meta ui-post-tag>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-tag>path dM20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z>/path>line x17 y17 x27 y27>/line>/svg> a href/tag/进程> 进程 /a>a href/tag/Go> Go /a>a href/tag/Rust> Rust /a>a href/tag/Fork> Fork /a>/div>/footer>/article>article itempropblogPost itemscopeitemscope itemtypehttps://schema.org/BlogPosting classui-post>meta itempropmainEntityOfPage content/2021/07/27/net/> header itempropname headline classui-post-title>a href/2021/07/27/net/ classnav-link>一次网络建设踩坑记/a>/header> p itempropdescription classui-post-summary> 本文不是教程，只做纯技术讨论和问题过程记录与解决。当前居住地用来上网的机器是一个刷了梅林固件的远古网件路由器，奈何性能和稳定性差，内置的软件也已经没人维护了，很多需求都无法满足，遂准备整备一下当前网络环境。根据以往经验，大思路是路由器只是单纯的使用原厂固件做好本职工作，例如提供 WIFI 以及有线连接，其他特殊需求通过一台 7*24 小时开机的机器（服务器）完成。机器选择 ... /p> footer>div itemproppublisher author itemtypehttp://schema.org/Person itemscopeitemscope classui-post-meta ui-post-author>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-navigation>polygon points3 11 22 2 13 21 11 13 3 11>/polygon>/svg> span itempropname>徐徐/span> span itempropaddress> in Beijing /span>/div> div classui-post-meta ui-post-date>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-clock>circle cx12 cy12 r10>/circle>polyline points12 6 12 12 16 14>/polyline>/svg> time pubdate itempropdatePublished datetime2021-07-27T00:00:00.000Z> 2021-07-27 /time>/div> div itempropkeywords classui-post-meta ui-post-tag>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-tag>path dM20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z>/path>line x17 y17 x27 y27>/line>/svg> a href/tag/计算机网络> 计算机网络 /a>a href/tag/TUN> TUN /a>a href/tag/路由器> 路由器 /a>a href/tag/交换机> 交换机 /a>a href/tag/代理> 代理 /a>/div>/footer>/article>article itempropblogPost itemscopeitemscope itemtypehttps://schema.org/BlogPosting classui-post>meta itempropmainEntityOfPage content/2021/06/20/share/> header itempropname headline classui-post-title>a href/2021/06/20/share/ classnav-link>伪共享/a>/header> p itempropdescription classui-post-summary> 在设计程序、算法、数据结构方面，了解基础的硬件设计构造和知识，有助于帮助我们设计良好性能的程序。同时还能为我们解决问题提供新的思考方向。以下 Go 性能测试代码，涉及到和硬件相关的问题：type CacheLinePad struct{ _ 64byte }type testPad struct { A uint32 _ CacheLinePad}type t ... /p> footer>div itemproppublisher author itemtypehttp://schema.org/Person itemscopeitemscope classui-post-meta ui-post-author>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-navigation>polygon points3 11 22 2 13 21 11 13 3 11>/polygon>/svg> span itempropname>徐徐/span> span itempropaddress> in Beijing /span>/div> div classui-post-meta ui-post-date>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-clock>circle cx12 cy12 r10>/circle>polyline points12 6 12 12 16 14>/polyline>/svg> time pubdate itempropdatePublished datetime2021-06-20T00:00:00.000Z> 2021-06-20 /time>/div> div itempropkeywords classui-post-meta ui-post-tag>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-tag>path dM20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z>/path>line x17 y17 x27 y27>/line>/svg> a href/tag/并发> 并发 /a>a href/tag/CPU> CPU /a>a href/tag/原子操作> 原子操作 /a>a href/tag/false sharing> false sharing /a>a href/tag/MESI> MESI /a>/div>/footer>/article>article itempropblogPost itemscopeitemscope itemtypehttps://schema.org/BlogPosting classui-post>meta itempropmainEntityOfPage content/2021/05/08/stack/> header itempropname headline classui-post-title>a href/2021/05/08/stack/ classnav-link>Go 中的栈/a>/header> p itempropdescription classui-post-summary> 之前在尝试阅读 Go runtime 代码的时候，看到有些函数是需要使用 systemstack 进行执行调用的，例如 runtime 中的监控逻辑 sysmon：systemstack(func() { newm(sysmon, nil, -1)})Go 中关于 systemstack 的注释也非常简洁明了：// systemstac ... /p> footer>div itemproppublisher author itemtypehttp://schema.org/Person itemscopeitemscope classui-post-meta ui-post-author>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-navigation>polygon points3 11 22 2 13 21 11 13 3 11>/polygon>/svg> span itempropname>徐徐/span> span itempropaddress> in Beijing /span>/div> div classui-post-meta ui-post-date>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-clock>circle cx12 cy12 r10>/circle>polyline points12 6 12 12 16 14>/polyline>/svg> time pubdate itempropdatePublished datetime2021-05-08T00:00:00.000Z> 2021-05-08 /time>/div> div itempropkeywords classui-post-meta ui-post-tag>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-tag>path dM20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z>/path>line x17 y17 x27 y27>/line>/svg> a href/tag/Go> Go /a>a href/tag/Stack> Stack /a>/div>/footer>/article>article itempropblogPost itemscopeitemscope itemtypehttps://schema.org/BlogPosting classui-post>meta itempropmainEntityOfPage content/2021/03/02/esp8266/> header itempropname headline classui-post-title>a href/2021/03/02/esp8266/ classnav-link>ESP8266/a>/header> p itempropdescription classui-post-summary> 前一段时间突发奇想想做一个硬件。需求是这样的：在老家一般太阳能加水都是使用水泵抽到房顶，当水满的时候，关掉水泵的电源。这样其实显得不够自动化，每次还要人看着，如果有一个硬件能控制，那可真是太棒了，哈哈。从硬件的实现角度来讲也很简单：就是通过水位的变化控制水泵的开关。注意，接下来的硬件提到到继电器，严肃提示：:warning:高压危险:warning:！硬件选型作为一 ... /p> footer>div itemproppublisher author itemtypehttp://schema.org/Person itemscopeitemscope classui-post-meta ui-post-author>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-navigation>polygon points3 11 22 2 13 21 11 13 3 11>/polygon>/svg> span itempropname>徐徐/span> span itempropaddress> in Beijing /span>/div> div classui-post-meta ui-post-date>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-clock>circle cx12 cy12 r10>/circle>polyline points12 6 12 12 16 14>/polyline>/svg> time pubdate itempropdatePublished datetime2021-03-02T00:00:00.000Z> 2021-03-02 /time>/div> div itempropkeywords classui-post-meta ui-post-tag>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-tag>path dM20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z>/path>line x17 y17 x27 y27>/line>/svg> a href/tag/ESP8266> ESP8266 /a>a href/tag/单片机> 单片机 /a>/div>/footer>/article>article itempropblogPost itemscopeitemscope itemtypehttps://schema.org/BlogPosting classui-post>meta itempropmainEntityOfPage content/2021/02/14/ssa/> header itempropname headline classui-post-title>a href/2021/02/14/ssa/ classnav-link>Go 编译器 SSA 中间代码探究/a>/header> p itempropdescription classui-post-summary> Go 版本：1.15.6起因前一段时间，在某个 Go 交流学习群里有一个群友发出下面两段特殊的代码：代码段 1 ：package mainimport "time"func main() { var i 1 go func() { time.Sleep(1*time.Second) println(i) }() i 2 f ... /p> footer>div itemproppublisher author itemtypehttp://schema.org/Person itemscopeitemscope classui-post-meta ui-post-author>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-navigation>polygon points3 11 22 2 13 21 11 13 3 11>/polygon>/svg> span itempropname>徐徐/span> span itempropaddress> in Beijing /span>/div> div classui-post-meta ui-post-date>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-clock>circle cx12 cy12 r10>/circle>polyline points12 6 12 12 16 14>/polyline>/svg> time pubdate itempropdatePublished datetime2021-02-14T00:00:00.000Z> 2021-02-14 /time>/div> div itempropkeywords classui-post-meta ui-post-tag>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-tag>path dM20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z>/path>line x17 y17 x27 y27>/line>/svg> a href/tag/Go> Go /a>a href/tag/SSA> SSA /a>a href/tag/编译器> 编译器 /a>/div>/footer>/article>article itempropblogPost itemscopeitemscope itemtypehttps://schema.org/BlogPosting classui-post>meta itempropmainEntityOfPage content/2021/01/16/win-bpf/> header itempropname headline classui-post-title>a href/2021/01/16/win-bpf/ classnav-link>在 WSL2 环境下安装 BPF 工具链/a>/header> p itempropdescription classui-post-summary> 最近想研究一下 BPF 技术，家里的台式机是 Windows 10 系统，借机想使用一下 WSL，所以就尝试在 WSL 环境下安装 BPF 工具链。但是在安装中遇到了很多困难，网上相关 WSL2 安装 BPF 的资料也难以找到，所以就自己简单研究了一下。环境WSL 版本：2发行版：Ubuntu 20.04.1 LTSWindows 版本：20H2安装常规 ... /p> footer>div itemproppublisher author itemtypehttp://schema.org/Person itemscopeitemscope classui-post-meta ui-post-author>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-navigation>polygon points3 11 22 2 13 21 11 13 3 11>/polygon>/svg> span itempropname>徐徐/span> span itempropaddress> in Beijing /span>/div> div classui-post-meta ui-post-date>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-clock>circle cx12 cy12 r10>/circle>polyline points12 6 12 12 16 14>/polyline>/svg> time pubdate itempropdatePublished datetime2021-01-16T00:00:00.000Z> 2021-01-16 /time>/div> div itempropkeywords classui-post-meta ui-post-tag>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-tag>path dM20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z>/path>line x17 y17 x27 y27>/line>/svg> a href/tag/WSL2> WSL2 /a>a href/tag/BPF> BPF /a>/div>/footer>/article>article itempropblogPost itemscopeitemscope itemtypehttps://schema.org/BlogPosting classui-post>meta itempropmainEntityOfPage content/2021/01/12/fasthttp/> header itempropname headline classui-post-title>a href/2021/01/12/fasthttp/ classnav-link>从一次线上问题排查发现的 fasthttp 设置问题/a>/header> p itempropdescription classui-post-summary> 近期由于新上的一个系统新版本出现了 bug，现象是某个 HTTP 接口会在接受一定量请求之后 hang 住，伴随着产生了大量调用方的超时报警。由于新上的系统不是面向用户的系统，所以要求运维保留现场，关掉了触发问题请求的任务，开始排查问题。最后找到问题的原因很简单：sqlx 库使用了 Queryx 方法，查询由于只是判断记录是否存在，所以并没有读取返回的 Rows，这就导致了一个问题，就 ... /p> footer>div itemproppublisher author itemtypehttp://schema.org/Person itemscopeitemscope classui-post-meta ui-post-author>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-navigation>polygon points3 11 22 2 13 21 11 13 3 11>/polygon>/svg> span itempropname>徐徐/span> span itempropaddress> in Beijing /span>/div> div classui-post-meta ui-post-date>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-clock>circle cx12 cy12 r10>/circle>polyline points12 6 12 12 16 14>/polyline>/svg> time pubdate itempropdatePublished datetime2021-01-12T00:00:00.000Z> 2021-01-12 /time>/div> div itempropkeywords classui-post-meta ui-post-tag>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-tag>path dM20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z>/path>line x17 y17 x27 y27>/line>/svg> a href/tag/Go> Go /a>a href/tag/编程> 编程 /a>a href/tag/fasthttp> fasthttp /a>/div>/footer>/article>article itempropblogPost itemscopeitemscope itemtypehttps://schema.org/BlogPosting classui-post>meta itempropmainEntityOfPage content/2020/08/03/go/> header itempropname headline classui-post-title>a href/2020/08/03/go/ classnav-link>从 Go 在 macOS 下的一个小问题说起/a>/header> p itempropdescription classui-post-summary> Go 版本：1.14.4macOS 版本：10.15.5从一段代码说起请看下面 Go 代码：package mainimport ( "fmt" "time")func main() { fmt.Println(time.Now().UnixNano()) fmt.Println(time.Now().UnixNano()) fmt.Pr ... /p> footer>div itemproppublisher author itemtypehttp://schema.org/Person itemscopeitemscope classui-post-meta ui-post-author>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-navigation>polygon points3 11 22 2 13 21 11 13 3 11>/polygon>/svg> span itempropname>徐徐/span> span itempropaddress> in Beijing /span>/div> div classui-post-meta ui-post-date>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-clock>circle cx12 cy12 r10>/circle>polyline points12 6 12 12 16 14>/polyline>/svg> time pubdate itempropdatePublished datetime2020-08-03T00:00:00.000Z> 2020-08-03 /time>/div> div itempropkeywords classui-post-meta ui-post-tag>svg xmlnshttp://www.w3.org/2000/svg width24 height24 viewBox0 0 24 24 fillnone strokecurrentColor stroke-width2 stroke-linecapround stroke-linejoinround classfeather feather-tag>path dM20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z>/path>line x17 y17 x27 y27>/line>/svg> a href/tag/Go> Go /a>a href/tag/编程> 编程 /a>/div>/footer>/article>/div> !---->/div>/div>/div> footer classfooter data-v-3d9deeb8>div classfooter-left-wrap data-v-3d9deeb8>ul classcontact data-v-3d9deeb8>li classcontact-item data-v-3d9deeb8>a hrefhttps://github.com/shijianzhiwai/ target_blank relnoopener noreferrer classnav-link external data-v-3d9deeb8>svg 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