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NAME

perf-trace − Read perf.data (created by perf record) and display trace output

SYNOPSIS

perf trace {record <script> | report <script> [args] }

DESCRIPTION

This command reads the input file and displays the trace recorded.

There are several variants of perf trace:

'perf trace' to see a detailed trace of the workload that was
recorded.

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 'perf trace −l'). The following variants allow you to
record and run those scripts:

'perf trace record <script>' to record the events required for 'perf
trace report'. <script> is the name displayed in the output of
'perf trace −−list' i.e. the actual script name minus any language
extension.

'perf trace report <script>' to run and display the results of
<script>. <script> is the name displayed in the output of 'perf
trace −−list' i.e. the actual script name minus any language
extension. The perf.data output from a previous run of 'perf trace
record <script>' is used and should be present for this command to
succeed.

See the 'SEE ALSO' section for links to language−specific
information on how to write and run your own trace scripts.

OPTIONS

−D, −−dump−raw−trace=

Display verbose dump of the trace data.

−L, −−Latency=

Show latency attributes (irqs/preemption disabled, etc).

−l, −−list=

Display a list of available trace scripts.

−s [lang], −−script=

Process trace data with the given script ([lang]:script[.ext]). If the string lang is specified in place of a script name, a list of supported languages will be displayed instead.

−g, −−gen−script=

Generate perf−trace.[ext] starter script for given language, using current perf.data.

SEE ALSO

perf-record(1), perf-trace-perl(1), perf-trace-python(1)

COMMENTS