'\" t
.\"     Title: perf-trace
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
.\"      Date: 11/23/2011
.\"    Manual: perf Manual
.\"    Source: perf 2.6.35.14-106.fc14.x86_64
.\"  Language: English
.\"
.TH "PERF\-TRACE" "1" "11/23/2011" "perf 2\&.6\&.35\&.14\-106\&.fc" "perf Manual"
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.SH "NAME"
perf-trace \- Read perf\&.data (created by perf record) and display trace output
.SH "SYNOPSIS"
.sp
.nf
\fIperf trace\fR {record <script> | report <script> [args] }
.fi
.SH "DESCRIPTION"
.sp
This command reads the input file and displays the trace recorded\&.
.sp
There are several variants of perf trace:
.sp
.if n \{\
.RS 4
.\}
.nf
\*(Aqperf trace\*(Aq to see a detailed trace of the workload that was
recorded\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
You can also run a set of pre\-canned scripts that aggregate and
summarize the raw trace data in various ways (the list of scripts is
available via \*(Aqperf trace \-l\*(Aq)\&.  The following variants allow you to
record and run those scripts:
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
\*(Aqperf trace record <script>\*(Aq to record the events required for \*(Aqperf
trace report\*(Aq\&.  <script> is the name displayed in the output of
\*(Aqperf trace \-\-list\*(Aq i\&.e\&. the actual script name minus any language
extension\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
\*(Aqperf trace report <script>\*(Aq to run and display the results of
<script>\&.  <script> is the name displayed in the output of \*(Aqperf
trace \-\-list\*(Aq i\&.e\&. the actual script name minus any language
extension\&.  The perf\&.data output from a previous run of \*(Aqperf trace
record <script>\*(Aq is used and should be present for this command to
succeed\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
See the \*(AqSEE ALSO\*(Aq section for links to language\-specific
information on how to write and run your own trace scripts\&.
.fi
.if n \{\
.RE
.\}
.SH "OPTIONS"
.PP
\-D, \-\-dump\-raw\-trace=
.RS 4
Display verbose dump of the trace data\&.
.RE
.PP
\-L, \-\-Latency=
.RS 4
Show latency attributes (irqs/preemption disabled, etc)\&.
.RE
.PP
\-l, \-\-list=
.RS 4
Display a list of available trace scripts\&.
.RE
.PP
\-s [\fIlang\fR], \-\-script=
.RS 4
Process trace data with the given script ([lang]:script[\&.ext])\&. If the string
\fIlang\fR
is specified in place of a script name, a list of supported languages will be displayed instead\&.
.RE
.PP
\-g, \-\-gen\-script=
.RS 4
Generate perf\-trace\&.[ext] starter script for given language, using current perf\&.data\&.
.RE
.SH "SEE ALSO"
.sp
\fBperf-record\fR(1), \fBperf-trace-perl\fR(1), \fBperf-trace-python\fR(1)