Julia Support

In order for the Polar Signals Agent to be able to profile Julia code, Julia version 1.9 or above has to be used with the ENABLE_JITPROFILING=1 environment variable set.

Troubleshooting

Below are some situations and how to troubleshoot them. If you've tried these and still haven't been able to resolve the issue, please contact support.

All I can see is memory addresses

First make sure the Julia version 1.9+ is used and that the process is started with the ENABLE_JITPROFILING=1 environment variable set.

Then check that the process is successfully writing a perfmap. By default, perfmaps are written to /tmp/perf-<PID>.map.

On Kubernetes for example this can be checked with:

kubectl exec --namespace <namespace-name> <pod-name> -- ls -la /tmp

For example:

$ kubectl exec -n default julia-demo -- ls -la /tmp
total 144
drwxrwxrwt 1 root root   4096 Jul 12 08:59 .
drwxr-xr-x 1 root root   4096 Jul 12 08:59 ..
-rw-r--r-- 1 root root 131811 Jul 12 08:59 perf-1.map

In this example the file we're looking for is the perf-1.map. For you it should be called something similar.