The dispadmin(1M) utility displays all current process scheduling classes by including the -l command line option during runtime. Process scheduling can also be changed for the class specified after the -c option, using RT as the argument for the real-time class.
The class options for dispadmin(1M) are in the following list:
Lists scheduler classes currently configured
Specifies the class with parameters to be displayed or to be changed
Gets the dispatch parameters for the specified class
Used with -g, specifies time quantum resolution
Specifies a file where values can be located
A class-specific file that contains the dispatch parameters can also be loaded during runtime. Use this file to establish a new set of priorities that replace the default values that were established during boot time. This class-specific file must assert the arguments in the format used by the -g option. Parameters for the RT class are found in the rt_dptbl(4), and are listed in Example 12–1.
To add an RT class file to the system, the following modules must be present:
An rt_init() routine in the class module that loads the rt_dptbl(4).
An rt_dptbl(4) module that provides the dispatch parameters and a routine to return pointers to config_rt_dptbl.
The dispadmin(1M) executable.
The following steps install a RT class dispatch table:
Load the class-specific module with the following command, where module_name is the class-specific module.
# modload /kernel/sched/module_name
Invoke the dispadmin command.
# dispadmin -c RT -s file_name
The file must describe a table with the same number of entries as the table that is being overwritten.