Grap the process id (PID) of the dotnet process.
ps aux | grep dotnet
root 16575 78.2 0.2 20337940 32648 ? RLsl 13:22 0:10 dotnet src.dll
root 16791 0.0 0.0 1588 4 ? Ss 13:22 0:00 /bin/sh -c apk add --no-cache curl;sleep 10s; while curl http://sample-dotnet:5000/api/values; curl http://sample-golang/; do sleep 1s; done
The value we are after is the ID 16575 which is dotnet src.dll (our app)
Let's start profiling:
docker run -it --rm --privileged \
--pid host \
-v ${PWD}:/out \
-v /etc/localtime:/etc/localtime:ro \
--pid host \
-v /sys/kernel/debug:/sys/kernel/debug \
-v /sys/fs/cgroup:/sys/fs/cgroup \
-v /sys/fs/bpf:/sys/fs/bpf \
--net host \
aimvector/flamegraph
Once inside the container, run:
./bcc/tools/profile.py -dF 99 -f 15 -p 16575 | \
./FlameGraph/flamegraph.pl > /out/perf.svg
Once done, you can exit the container and perf.svg will be produced