These are pretty cool. I'd love to see a mobile specific one: https://phabricator.wikimedia.org/T78621
On Mon, Dec 15, 2014 at 3:48 PM, Aaron Schulz <asch...@wikimedia.org> wrote: > Cool! > > On Mon, Dec 15, 2014 at 3:42 PM, Ori Livneh <o...@wikimedia.org> wrote: >> >> I'm writing to draw your attention to a newly-available resource for >> performance analysis: flame graphs of MediaWiki code. >> >> http://performance.wikimedia.org/xenon/svgs/ >> >> Flame graphs are a visualization of application stack traces. >> >> Each application server on the Wikimedia cluster has a software timer that >> interrupts MediaWiki once every ten minutes to capture a stack trace. The >> stack trace shows what the code the application server was in the process of >> executing when the timer expired. A central log aggregator collects these >> traces and uses them to generate flame graphs. >> >> Each box in a flame graph represents a function in the stack. The y-axis >> shows stack depth. The topmost box shows the function that was on-CPU at the >> moment the trace was captured. The function below a function is its parent. >> >> The x-axis spans the sample population. The width of the box shows the >> total time it was on-CPU or part of an ancestry that was on-CPU, based on >> sample count. >> >> Here is an example: >> http://performance.wikimedia.org/xenon/svgs/hourly/2014-12-15_22.svgz >> >> To learn more about flame graphs and how to interpret them, see >> <http://www.brendangregg.com/flamegraphs.html>. >> >> >> _______________________________________________ >> Engineering mailing list >> engineer...@lists.wikimedia.org >> https://lists.wikimedia.org/mailman/listinfo/engineering >> > > > -- > -Aaron S > > _______________________________________________ > Engineering mailing list > engineer...@lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/engineering > _______________________________________________ Wikitech-l mailing list Wikitech-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l
