SharePoint - SPmonitoredScope - Dashboard
In order for custom code to show up in the dev dashboard you need to make use of the SpMonitoredScope:
using (new SPMonitoredScope(“My Scope Name”))
{
doSomeWork();
}
https://msdn.microsoft.com/en-us/library/ff512758.aspx
We have been finding that a few tough issues should have been trivial if the parts had been showing up!