'\" t
.\"     Title: perf-ftrace
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 2017-07-18
.\"    Manual: perf Manual
.\"    Source: perf
.\"  Language: English
.\"
.TH "PERF_4.12\-FTRACE" "1" "2017\-07\-18" "perf" "perf Manual"
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.SH "NAME"
perf-ftrace \- simple wrapper for kernel\*(Aqs ftrace functionality
.SH "SYNOPSIS"
.sp
.nf
\fIperf ftrace\fR <command>
.fi
.SH "DESCRIPTION"
.sp
The \fIperf ftrace\fR command is a simple wrapper of kernel\(cqs ftrace functionality\&. It only supports single thread tracing currently and just reads trace_pipe in text and then write it to stdout\&.
.sp
The following options apply to perf ftrace\&.
.SH "OPTIONS"
.PP
\-t, \-\-tracer=
.RS 4
Tracer to use: function_graph or function\&.
.RE
.PP
\-v, \-\-verbose=
.RS 4
Verbosity level\&.
.RE
.PP
\-p, \-\-pid=
.RS 4
Trace on existing process id (comma separated list)\&.
.RE
.PP
\-a, \-\-all\-cpus
.RS 4
Force system\-wide collection\&. Scripts run without a <command> normally use \-a by default, while scripts run with a <command> normally don\(cqt \- this option allows the latter to be run in system\-wide mode\&.
.RE
.PP
\-C, \-\-cpu=
.RS 4
Only trace for the list of CPUs provided\&. Multiple CPUs can be provided as a comma separated list with no space like: 0,1\&. Ranges of CPUs are specified with \-: 0\-2\&. Default is to trace on all online CPUs\&.
.RE
.SH "SEE ALSO"
.sp
\fBperf_4.12-record\fR(1), \fBperf_4.12-trace\fR(1)