6 perf-script - Read perf.data (created by perf record) and display trace output
11 'perf script' [<options>]
12 'perf script' [<options>] record <script> [<record-options>] <command>
13 'perf script' [<options>] report <script> [script-args]
14 'perf script' [<options>] <script> <required-script-args> [<record-options>] <command>
15 'perf script' [<options>] <top-script> [script-args]
19 This command reads the input file and displays the trace recorded.
21 There are several variants of perf script:
23 'perf script' to see a detailed trace of the workload that was
26 You can also run a set of pre-canned scripts that aggregate and
27 summarize the raw trace data in various ways (the list of scripts is
28 available via 'perf script -l'). The following variants allow you to
29 record and run those scripts:
31 'perf script record <script> <command>' to record the events required
32 for 'perf script report'. <script> is the name displayed in the
33 output of 'perf script --list' i.e. the actual script name minus any
34 language extension. If <command> is not specified, the events are
35 recorded using the -a (system-wide) 'perf record' option.
37 'perf script report <script> [args]' to run and display the results
38 of <script>. <script> is the name displayed in the output of 'perf
39 trace --list' i.e. the actual script name minus any language
40 extension. The perf.data output from a previous run of 'perf script
41 record <script>' is used and should be present for this command to
42 succeed. [args] refers to the (mainly optional) args expected by
45 'perf script <script> <required-script-args> <command>' to both
46 record the events required for <script> and to run the <script>
47 using 'live-mode' i.e. without writing anything to disk. <script>
48 is the name displayed in the output of 'perf script --list' i.e. the
49 actual script name minus any language extension. If <command> is
50 not specified, the events are recorded using the -a (system-wide)
51 'perf record' option. If <script> has any required args, they
52 should be specified before <command>. This mode doesn't allow for
53 optional script args to be specified; if optional script args are
54 desired, they can be specified using separate 'perf script record'
55 and 'perf script report' commands, with the stdout of the record step
56 piped to the stdin of the report script, using the '-o -' and '-i -'
57 options of the corresponding commands.
59 'perf script <top-script>' to both record the events required for
60 <top-script> and to run the <top-script> using 'live-mode'
61 i.e. without writing anything to disk. <top-script> is the name
62 displayed in the output of 'perf script --list' i.e. the actual
63 script name minus any language extension; a <top-script> is defined
64 as any script name ending with the string 'top'.
66 [<record-options>] can be passed to the record steps of 'perf script
67 record' and 'live-mode' variants; this isn't possible however for
68 <top-script> 'live-mode' or 'perf script report' variants.
70 See the 'SEE ALSO' section for links to language-specific
71 information on how to write and run your own trace scripts.
76 Any command you can specify in a shell.
80 Display verbose dump of the trace data.
84 Show latency attributes (irqs/preemption disabled, etc).
88 Display a list of available trace scripts.
92 Process trace data with the given script ([lang]:script[.ext]).
93 If the string 'lang' is specified in place of a script name, a
94 list of supported languages will be displayed instead.
98 Generate perf-script.[ext] starter script for given language,
99 using current perf.data.
102 Force system-wide collection. Scripts run without a <command>
103 normally use -a by default, while scripts run with a <command>
104 normally don't - this option allows the latter to be run in
113 Do various checks like samples ordering and lost events.
117 Comma separated list of fields to print. Options are:
118 comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr.
119 Field list can be prepended with the type, trace, sw or hw,
120 to indicate to which event type the field list applies.
121 e.g., -f sw:comm,tid,time,ip,sym and -f trace:time,cpu,trace
123 perf script -f <fields>
127 perf script -f trace:<fields> -f sw:<fields> -f hw:<fields>
129 i.e., the specified fields apply to all event types if the type string
132 The arguments are processed in the order received. A later usage can
133 reset a prior request. e.g.:
135 -f trace: -f comm,tid,time,ip,sym
137 The first -f suppresses trace events (field list is ""), but then the
138 second invocation sets the fields to comm,tid,time,ip,sym. In this case a
139 warning is given to the user:
141 "Overriding previous field request for all events."
143 Alternativey, consider the order:
145 -f comm,tid,time,ip,sym -f trace:
147 The first -f sets the fields for all events and the second -f
148 suppresses trace events. The user is given a warning message about
149 the override, and the result of the above is that only S/W and H/W
150 events are displayed with the given fields.
152 For the 'wildcard' option if a user selected field is invalid for an
153 event type, a message is displayed to the user that the option is
154 ignored for that type. For example:
156 $ perf script -f comm,tid,trace
157 'trace' not valid for hardware events. Ignoring.
158 'trace' not valid for software events. Ignoring.
160 Alternatively, if the type is given an invalid field is specified it
161 is an error. For example:
163 perf script -v -f sw:comm,tid,trace
164 'trace' not valid for software events.
166 At this point usage is displayed, and perf-script exits.
168 Finally, a user may not set fields to none for all event types.
169 i.e., -f "" is not allowed.
178 --symfs=<directory>::
179 Look for files with symbols relative to this directory.
183 When printing symbols do not display call chain.
186 --cpu:: Only report samples for the list of CPUs provided. Multiple CPUs can
187 be provided as a comma-separated list with no space: 0,1. Ranges of
188 CPUs are specified with -: 0-2. Default is to report samples on all
193 linkperf:perf-record[1], linkperf:perf-script-perl[1],
194 linkperf:perf-script-python[1]