pridist.d(1m) USER COMMANDS pridist.d(1m)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 produces 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 directory. 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(1m)
Check Out this Related Man Page
fddist(1m) USER COMMANDS fddist(1m)NAME
fddist - file descriptor usage distributions. Uses DTrace.
SYNOPSIS
fddist [-r|-w]
DESCRIPTION
This prints distributions for read and write events by file descriptor, by process. This can be used to determine which file descriptor a
process is doing the most I/O with.
Since this uses DTrace, only users with root privileges can run this command.
OPTIONS -r reads only
-w writes only
EXAMPLES
Sample both read and write activity,
# fddist
Sample reads only,
# fddist -r
FIELDS
EXEC process name
PID process ID
value file descriptor
count number of events
BASED ON
/usr/demo/dtrace/lquantize.d
DOCUMENTATION
DTrace Guide "Aggregations" chapter (docs.sun.com)
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
fddist will sample until Ctrl-C is hit.
SEE ALSO dtrace(1M)version 0.70 Jun 08, 2005 fddist(1m)
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