procsystime(1m) USER COMMANDS procsystime(1m)
procsystime - analyse system call times. Uses DTrace.
procsystime [-acehoT] [ -p PID | -n name | command ]
procsystime prints details on system call times for processes, both the
elapsed times and on-cpu times can be printed.
The elapsed times are interesting, to help identify syscalls that take
some time to complete (during which the process may have slept). CPU time
helps us identify syscalls that are consuming CPU cycles to run.
Since this uses DTrace, only users with root privileges can run this
-a print all data
-c print syscall counts
-e print elapsed times, ns
-o print CPU times, ns
-T print totals
-p PID examine this PID
examine processes which have this name
Print elapsed times for PID 1871,
# procsystime -p 1871
Print elapsed times for processes called "tar",
# procsystime -n tar
Print CPU times for "tar" processes,
# procsystime -on tar
Print syscall counts for "tar" processes,
# procsystime -cn tar
Print elapsed and CPU times for "tar" processes,
# procsystime -eon tar
print all details for "bash" processes,
# procsystime -aTn bash
run and print details for "df -h",
# procsystime df -h
System call name
Total time, nanoseconds
COUNT Number of occurrences
See the DTraceToolkit for further documentation under the Docs directory.
The DTraceToolkit docs may include full worked examples with verbose
descriptions explaining the output.
procsystime will sample until Ctrl-C is hit.
Brendan Gregg [Sydney, Australia]
dtruss(1M), dtrace(1M), truss(1)
version 1.00 September 22, 2005 procsystime(1m)