DTRUSS(1)						    BSD General Commands Manual 						 DTRUSS(1)

NAME

     dtruss -- Trace system calls and userland stacks using DTrace

SYNOPSIS

     dtruss [-acdefholLs] [-t syscall] [-n name -p pid command]

DESCRIPTION

     The dtruss utility traces system calls and (optionally) userland stack traces for the specified programs.

     The following options are available:

     -p pid  Trace the process with PID pid.

     -n name
	     Trace the process with name name.

     -t syscall
	     Trace the specified syscall only.

     -a      Print all details.

     -c      Print syscall counts.

     -d      Print relative times (in microseconds).

     -e      Print elapsed times (in microseconds).

     -f      Follow the children processes.

     -l      Force printing PID / TID.

     -o      Print time spent on CPU.

     -s      Print userland stack backtraces.

     -L      Don't print PID / TID.

     -b bufsize
	     Specify the DTrace buffer size.

EXIT STATUS

     The dtruss utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     dtrace(1)

HISTORY

     The dtruss utility comes from the DTraceToolkit and was first imported into FreeBSD 9.0.

AUTHORS

     Brendan Gregg

BSD
								  August 26, 2010							       BSD