[cfe-dev] [Analyzer] pretty profiling pictures

[Craig, Ben via cfe-dev]

I've been doing profiling on the static analyzer for a while, but 
Linux's perf is pretty difficult to get a mental grasp on.  Enter 
FlameGraph (https://github.com/brendangregg/FlameGraph) as a great way 
to visualize Linux's perf (and other profiler) data. In case it isn't 
clear, I didn't write this tool, I just used it.

Here's a PNG of an analysis run.  Normally a neat interactive SVG comes 
out the tool, but a 1MB attachment seems like a bad idea.


Now here's the same run, but only showing call stacks that involve calls 
to functions named removeDead*.


I think the useful thing to get out of these pictures (and the captions 
underneath) is that 40% of the cpu time is spent on callstacks involving 
"removeDead".

-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project

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