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Linux下做性能分析：perf

Google-Wide Profiling: A Continuous Profiling Infrastructure for Data Centers

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What is continuous profiling?

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Linux在20世纪90年代晚期诞生的，它的出现是一个巨大的革命，被认为是开源系统的一大成功，也引领了互联网时代的到来。因为Linux一直不断地发展壮大，每隔一段时间就会有新的内核版本发布，当Linux的新版本发布后，就需要对内核进行升级。

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远程桌面连接出现了内部错误的问题新开阿里云服务器必须在安全组放行80,443端口否则网站打不开域名解析到的阿里云的网站打不开 Linux系统内核升级 Linux系统yum的安装、升级、卸载命令详解

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