CPU Flame Graphs

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Mattias Geniar, November 23, 2014

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I’ve only heard of CPU Flame Graphs since the article on NodeJS performance issues at Netflix.

… given a performance problem, observability is of the utmost importance. Flame graphs gave us tremendous insight into where our app was spending most of its time on CPU. I canโ€™t imagine how we would have solved this problem without being able to sample Node.js stacks and visualize them with flame graphs.Yunong Xiao @ Netflix

The source code is available on Github.

CPU Flame Graph

It uses DTrace (or perf_events, SystemTap, or ktap) to capture the kernel output and convert it into an SVG image for you to analyse (see an example here).

Now all I need is an excuse (and time) to use this!

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