Subsecond-offset Heat Maps and Flamegraphs With Flamescope

Given a profile, flamescope generates a subsecond-offset heat map.

From that heat map you can select a time range and then a flamegraph will be generated for it.

Install

git clone https://github.com/Netflix/flamescope
cd flamescope
docker build -t flamescope .

Usage

Generate profile

For example, a 2 min profile for the whole system:

perf record -F 49 -a --call-graph dwarf -- sleep 120
perf script --header > myapp.stacks

Run flamescope

Copy profiles to, for example, /tmp/profiles.

Then run flamescope:

docker run --rm -it -v /tmp/profiles:/profiles:ro -p 5000:5000 flamescope

Open http://localhost:5000 in your browser and start using flamescope.