You can use prstat(1M) to monitor CPU usage by active projects.
You can use the extended accounting data for tasks to obtain per-project statistics on the amount of CPU resources that are consumed over longer periods. See Chapter 7, Extended Accounting for more information.
To monitor the CPU usage of projects that run on the system, type the following:
% prstat -J
To monitor the CPU usage of projects on a list of processor sets, type the following:
% prstat -J -C pset-list
List of processor set IDs that are separated by commas