pridist.d(1) USER COMMANDS pridist.d(1)
NAME
pridist.d - process priority distribution. Uses DTrace.
SYNOPSIS
pridist.d
DESCRIPTION
This is a simple DTrace script that samples at 1000 Hz which process is
on the CPUs, and what the priority is. A distribution plot is printed.
With priorities, the higher the priority the better chance the process
(actually, thread) has of being scheduled.
This idea came from the script /usr/demo/dtrace/profpri.d, which pro-
duces similar output for one particular PID.
Since this uses DTrace, only users with root privileges can run this
command.
EXAMPLES
This samples until Ctrl-C is hit.
# pridist.d
FIELDS
CMD process name
PID process ID
value process priority
count number of samples of at least this priority
BASED ON
/usr/demo/dtrace/profpri.d
DOCUMENTATION
DTrace Guide "profile Provider" chapter (docs.sun.com)
See the DTraceToolkit for further documentation under the Docs direc-
tory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
pridist.d will sample until Ctrl-C is hit.
SEE ALSO
dispadmin(1M), dtrace(1M)
version 0.90 Jun 13, 2005 pridist.d(1)
Mac OS X 10.6 - Generated Thu Sep 17 20:08:56 CDT 2009