tools/perf/Documentation/perf-script.txt

   1 perf-script(1)
   2 =============
   3
   4 NAME
   5 ----
   6 perf-script - Read perf.data (created by perf record) and display trace output
   7
   8 SYNOPSIS
   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
  17 DESCRIPTION
  18 -----------
  19 This command reads the input file and displays the trace recorded.
  20
  21 There 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
  73 OPTIONS
  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, 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
 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,ip,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,ip,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,ip,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
 185 SEE ALSO
 186 --------
 187 linkperf:perf-record[1], linkperf:perf-script-perl[1],
 188 linkperf:perf-script-python[1]