Copyright (c) 2010 The FreeBSD Foundation
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This software was developed by Rui Paulo under sponsorship from the
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$FreeBSD$

.Dd August 26, 2010 .Dt DTRUSS 1 .Os .Sh NAME .Nm dtruss .Nd Trace system calls and userland stacks using DTrace .Sh SYNOPSIS .Nm .Op Fl acdefholLs .Op Fl t Ar syscall .Op Fl n Ar name Fl p Ar pid Ar command .Sh DESCRIPTION The .Nm utility traces system calls and (optionally) userland stack traces for the specified programs.

p The following options are available: l -tag -width indent t Fl p Ar pid Trace the process with PID .Ar pid . t Fl n Ar name Trace the process with name .Ar name . t Fl t Ar syscall Trace the specified syscall only. t Fl a Print all details. t Fl c Print syscall counts. t Fl d Print relative times (in microseconds). t Fl e Print elapsed times (in microseconds). t Fl f Follow the children processes. t Fl l Force printing PID / TID. t Fl o Print time spent on CPU. t Fl s Print userland stack backtraces. t Fl L Don't print PID / TID. t Fl b Ar bufsize Specify the DTrace buffer size. .El .Sh EXIT STATUS .Ex -std .Sh SEE ALSO .Xr dtrace 1 .Sh HISTORY The .Nm utility comes from the DTraceToolkit and was first imported into .Fx 9.0 . .Sh AUTHORS .An Brendan Gregg