Can you please clarify your case - is your application a set of processes? Is there any root process that executes other processes?
Do you wish to get the results for all the processes or just a subset of them?
Using command line you can execute amplxe-cl multiple times to attach to several processes, although not all the analysis types support this (e.g. you can do it for "hotspots", but not for "advanced-hotspots"). Use "-target-pid" option to specify a PID to attach. VTune Amplifier can also follow child processes if there is a parent process in your application.
With advanced-hotspots you can also profile the whole system with just a single invocation and then analyze all the interesting processes using a single result.
