Observer Tool: Processes appear in the Processes List but not in the Applications graph

Question

I've opened my project with iex -S mix and started my application inside then I run :observer.start() to see my processes. The problem is that my application's processes don't appear under the Applications tab, but the do appear in the Processes list.

Why could that be?

Answer 1

原来我忘了定义application callback。

Answer 2

将在观察者图形应用程序浏览器中显示的唯一进程是通过proc_lib函数启动的进程。这就是所有OTP使用的。如果您只是使用普通spawn来电，他们仍然会出现在完整流程列表中。这是因为系统不知道如何将这些流程放入应用程序的树中，因为proc_lib是从哪个应用程序开始的簿记。