The Linux Perf tool is pretty powerful. I've barely just scratched the surface myself.

https://perf.wiki.kernel.org/index.php/Main_Page

As as a side note, Go and pretty good profiling tools. You can see a trace of goroutine execution and why a goroutine got scheduled out and when GC kicks in.

https://about.sourcegraph.com/go/an-introduction-to-go-tool-...