1perf-script(1) 2============= 3 4NAME 5---- 6perf-script - Read perf.data (created by perf record) and display trace output 7 8SYNOPSIS 9-------- 10[verse] 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] 16 17DESCRIPTION 18----------- 19This command reads the input file and displays the trace recorded. 20 21There are several variants of perf script: 22 23 'perf script' to see a detailed trace of the workload that was 24 recorded. 25 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: 30 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. 36 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 43 the script. 44 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. 58 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'. 65 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. 69 70 See the 'SEE ALSO' section for links to language-specific 71 information on how to write and run your own trace scripts. 72 73OPTIONS 74------- 75<command>...:: 76 Any command you can specify in a shell. 77 78-D:: 79--dump-raw-script=:: 80 Display verbose dump of the trace data. 81 82-L:: 83--Latency=:: 84 Show latency attributes (irqs/preemption disabled, etc). 85 86-l:: 87--list=:: 88 Display a list of available trace scripts. 89 90-s ['lang']:: 91--script=:: 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. 95 96-g:: 97--gen-script=:: 98 Generate perf-script.[ext] starter script for given language, 99 using current perf.data. 100 101-a:: 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 105 system-wide mode. 106 107-i:: 108--input=:: 109 Input file name. 110 111-d:: 112--debug-mode:: 113 Do various checks like samples ordering and lost events. 114 115-f:: 116--fields:: 117 Comma separated list of fields to print. Options are: 118 comm, tid, pid, time, cpu, event, trace, sym. Field 119 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,sym and -f trace:time,cpu,trace 122 123 perf script -f <fields> 124 125 is equivalent to: 126 127 perf script -f trace:<fields> -f sw:<fields> -f hw:<fields> 128 129 i.e., the specified fields apply to all event types if the type string 130 is not given. 131 132 The arguments are processed in the order received. A later usage can 133 reset a prior request. e.g.: 134 135 -f trace: -f comm,tid,time,sym 136 137 The first -f suppresses trace events (field list is ""), but then the 138 second invocation sets the fields to comm,tid,time,sym. In this case a 139 warning is given to the user: 140 141 "Overriding previous field request for all events." 142 143 Alternativey, consider the order: 144 145 -f comm,tid,time,sym -f trace: 146 147 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. 151 152 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: 155 156 $ perf script -f comm,tid,trace 157 'trace' not valid for hardware events. Ignoring. 158 'trace' not valid for software events. Ignoring. 159 160 Alternatively, if the type is given an invalid field is specified it 161 is an error. For example: 162 163 perf script -v -f sw:comm,tid,trace 164 'trace' not valid for software events. 165 166 At this point usage is displayed, and perf-script exits. 167 168 Finally, a user may not set fields to none for all event types. 169 i.e., -f "" is not allowed. 170 171-k:: 172--vmlinux=<file>:: 173 vmlinux pathname 174 175--kallsyms=<file>:: 176 kallsyms pathname 177 178--symfs=<directory>:: 179 Look for files with symbols relative to this directory. 180 181-G:: 182--hide-call-graph:: 183 When printing symbols do not display call chain. 184 185SEE ALSO 186-------- 187linkperf:perf-record[1], linkperf:perf-script-perl[1], 188linkperf:perf-script-python[1] 189