I assume you found the ps command in ONTAP. Please be aware that the output is not intended for end users. I have found over the years that many of the thread names do not necessarily reflect their function so a thread called statd, may be doing things other than statd on an NFS system. Also, CPU % is not always a good indicator of filer performance as ONTAP has many background threads that will kick in when protocol usage is low and back-off when user activity comes in. So the fact that the CPU may be running higher may have no impact at all on serving data.