priclass.d - priority distribution by scheduling class. Uses DTrace. priclass.d This is a simple DTrace script that samples at 1000 Hz the current thread's scheduling class and priority. A distribution plot is printed. With priorities, the higher the priority the better chance the thread has of being scheduled. This idea came from the script /usr/demo/dtrace/pri.d, which produces similar output for priority changes, not samples. Since this uses DTrace, only the root user or users with the dtrace_kernel privilege can run this command. Solaris stable.

This samples until Ctrl-C is hit. # priclass.d

value process priority

count number of samples of at least this priority

TS time sharing

IA interactive

RT real time

SYS system

FSS fair share scheduler

/usr/demo/dtrace/pri.d

DTrace Guide "profile Provider" chapter (docs.oracle.com) See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output. priclass.d will sample until Ctrl-C is hit. pridist.d(1M), dispadmin(1M), dtrace(1M)