Today I have configured Performance point on SharePoint 2010, just want to share the process.
At first we have to configure secure store service app/ service.
Click manage service a applications
Click New Secure Store service
Configure the Secure Store Service App ( below is the screen from serviceapps view)
Also check in services if the secure store service has started, if not start it.
Click secure store service APP & Generate New key
Now in similar fashion create Performance Point Service Application
Click performance point service APP
Associate to secure store service app, create unattended account.
Now Just add trusted Locations to control the performance point usage.