priclass.d(1m) USER COMMANDS priclass.d(1m)
priclass.d - priority distribution by scheduling class. Uses DTrace.
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 users with root privileges can run this
This samples until Ctrl-C is hit.
value process priority
count number of samples of at least this priority
TS time sharing
RT real time
FSS fair share scheduler
DTrace Guide "profile Provider" chapter (docs.sun.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)
version 1.00 April 22, 2006 priclass.d(1m)