procsystime(1m) [osx man page]
procsystime(1m) USER COMMANDS procsystime(1m) NAME
procsystime - analyse system call times. Uses DTrace. SYNOPSIS
procsystime [-acehoT] [ -p PID | -n name | command ] DESCRIPTION
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 command. OPTIONS
-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 -n name examine processes which have this name EXAMPLES
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 FIELDS
SYSCALL System call name TIME (ns) Total time, nanoseconds COUNT Number of occurrences DOCUMENTATION
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
procsystime will sample until Ctrl-C is hit. AUTHOR
Brendan Gregg [Sydney, Australia] SEE ALSO
dtruss(1M), dtrace(1M), truss(1) version 1.00 Sep 22, 2005 procsystime(1m)
Check Out this Related Man Page
dappprof(1m) USER COMMANDS dappprof(1m) NAME
dappprof - profile user and lib function usage. Uses DTrace. SYNOPSIS
dappprof [-acehoTU] [-u lib] { -p PID | command } DESCRIPTION
dappprof prints details on user and library call times for processes as a summary style aggragation. By default the user fuctions are traced, options can be used to trace library activity. Output can include function counts, elapsed times and on cpu times. The elapsed times are interesting, to help identify functions 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 command. OPTIONS
-a print all data -c print function counts -e print elapsed times, ns -o print CPU times, ns -T print totals -p PID examine this PID -u lib trace this library instead -U trace all library and user functions EXAMPLES
run and examine the "df -h" command, # dappprof df -h print elapsed times, on-cpu times and counts for "df -h", # dappprof -ceo df -h print elapsed times for PID 1871, # dappprof -p 1871 print all data for PID 1871, # dappprof -ap 1871 FIELDS
CALL Function call name ELAPSED Total elapsed time, nanoseconds CPU Total on-cpu time, nanoseconds COUNT Number of occurrences DOCUMENTATION
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
dappprof will sample until Ctrl-C is hit. AUTHOR
Brendan Gregg [Sydney, Australia] SEE ALSO
dapptrace(1M), dtrace(1M), apptrace(1) version 1.10 May 14, 2005 dappprof(1m)