how to perform a basic test in SharePoint 2013 to check if the user profile service application is running properly.
their are couple of things you can check to make sure User Profile service is running.
- check if all users from AD( depending upon ur OU & filters) having a profile in the User Profile. Check from central Admin.
- Make Sure, User Profile and User Profile Sync service is up and running.
- click on the User's Profile and see if u are getting the correct information as it is in AD.
- On SharePoint User Profile Page at Central Admin, check if number of imported profiles meet with AD numbers.
Check last part of this blog