How to Change the Class of a Process

1. (Optional) Become superuser.

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   Note –

   You must be superuser or working in a real-time shell to change a process from, or to, a real-time process.

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2. Change the class of a process.

   # priocntl -s -c class -i idtype idlist

   -s	Lets you set the upper limit on the user priority range and change the current priority.
   -c class	Specifies the class, TS or RT, to which you are changing the process.
   -i idtype idlist	Uses a combination of idtype and idlist to identify the process or processes. The idtype specifies the type of ID, such as pid or UID. Use idlist to identify a list of pids or UIDs.

3. Verify the process status.

   # ps -ecl | grep idlist

Example—Changing the Class of a Process

The following example shows how to change all the processes belonging to user 15249 to real-time processes.

# priocntl -s -c RT -i uid 15249
# ps -ecl | grep 15249

If, as superuser, you change a user process to the real-time class, the user cannot subsequently change the real-time scheduling parameters by using the priocntl -s command.