我们在《一文看懂Linux性能分析｜perf 原理》一文中介绍过，perf 是基于采样来对程序进行分析的。采样的步骤如下： 通过设置一个定时器，定时器的触发时间可以由用户设定。 定时器被触发后，将会调用采集函数收集当前运行环境的数据（如当前正在执行的 ...

系统级性能优化通常包括两个阶段：性能剖析（performance profiling）和代码优化。 性能剖析的目标是寻找性能瓶颈，查找引发性能问题的原因及热点代码。 代码优化的目标是针对具体性能问题而优化代码或编译选项，以改善软件性能。 在性能剖析阶段，需要借助 ...

With the first rumblings of Meltdown and Spectre malware appearing, it's time to patch our systems against these CPU vulnerabilities. We know these patches will slow our systems down, but, for Linux ...

KDAB, a German consulting firm that develops graphics and visualization tools, has released Hotspot 1.0, a GUI too for visualizing performance data generated by the Linux perf tool. Perf analyzes ...

In this video from the Velocity 2015 conference, Brendan Gregg from Netflix presents a 90 minute tutorial on Linux performance tools. There are many performance tools nowadays for Linux, but how do ...

In today's open source roundup: How Netflix checks Linux performance issues. Plus: How to install Unity 8 on Ubuntu 16.04 LTS and Ubuntu 15.10. And Google ends support for Chrome on 32-bit Linux, ...

Tuning Linux systems for performance is an essential task for any system administrator, but it also is one of the least documented. Without a hard-won understanding, performance tuning often can seem ...

At only a few years old, Clear Linux hasn’t been around long enough to start appearing in top-ten distro lists all over, but it’s an OS that offers enough uniqueness to warrant a fair look. At a basic ...