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alicegoldfuss/gist:12e7238d1b387134c037e2eb5af66d87

Created April 19, 2017 21:53
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2. Capture a system profile on the host with something like
```
sudo perf record -F 99 -a -g -- sleep 30
```
3. From inside the container (easier to have this running already in another shell) dump the symbols for the Java process with
```
java -cp attach-main.jar:$JAVA_HOME/lib/tools.jar \
```
```
net.virtualvoid.perf.AttachOnce PID
```
3. You will now have a `perf-PID.map` file inside `/tmp` of the container. Move this file to the host (I used a mounted volume).
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