tools/perf/Documentation/perf-script.txt - kernel/windcharger - Git at Google

 perf-script(1)
 =============

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

 SYNOPSIS
 --------
 [verse]
 'perf script' [<options>]
 'perf script' [<options>] record <script> [<record-options>] <command>
 'perf script' [<options>] report <script> [script-args]
 'perf script' [<options>] <script> <required-script-args> [<record-options>] <command>
 'perf script' [<options>] <top-script> [script-args]

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

 There are several variants of perf script:

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

   'perf script record <script> <command>' to record the events required
   for 'perf script report'.  <script> is the name displayed in the
   output of 'perf script --list' i.e. the actual script name minus any
   language extension.  If <command> is not specified, the events are
   recorded using the -a (system-wide) 'perf record' option.

   'perf script report <script> [args]' 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 script
   record <script>' is used and should be present for this command to
   succeed.  [args] refers to the (mainly optional) args expected by
   the script.

   'perf script <script> <required-script-args> <command>' to both
   record the events required for <script> and to run the <script>
   using 'live-mode' i.e. without writing anything to disk.  <script>
   is the name displayed in the output of 'perf script --list' i.e. the
   actual script name minus any language extension.  If <command> is
   not specified, the events are recorded using the -a (system-wide)
   'perf record' option.  If <script> has any required args, they
   should be specified before <command>.  This mode doesn't allow for
   optional script args to be specified; if optional script args are
   desired, they can be specified using separate 'perf script record'
   and 'perf script report' commands, with the stdout of the record step
   piped to the stdin of the report script, using the '-o -' and '-i -'
   options of the corresponding commands.

   'perf script <top-script>' to both record the events required for
   <top-script> and to run the <top-script> using 'live-mode'
   i.e. without writing anything to disk.  <top-script> is the name
   displayed in the output of 'perf script --list' i.e. the actual
   script name minus any language extension; a <top-script> is defined
   as any script name ending with the string 'top'.

   [<record-options>] can be passed to the record steps of 'perf script
   record' and 'live-mode' variants; this isn't possible however for
   <top-script> 'live-mode' or 'perf script report' variants.

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

 OPTIONS
 -------
 <command>...::
 	Any command you can specify in a shell.

 -D::
 --dump-raw-script=::
         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-script.[ext] starter script for given language,
         using current perf.data.

 -a::
         Force system-wide collection.  Scripts run without a <command>
         normally use -a by default, while scripts run with a <command>
         normally don't - this option allows the latter to be run in
         system-wide mode.

 -i::
 --input=::
         Input file name. (default: perf.data unless stdin is a fifo)

 -d::
 --debug-mode::
         Do various checks like samples ordering and lost events.

 -f::
 --fields::
         Comma separated list of fields to print. Options are:
         comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr.
         Field list can be prepended with the type, trace, sw or hw,
         to indicate to which event type the field list applies.
         e.g., -f sw:comm,tid,time,ip,sym  and -f trace:time,cpu,trace

 		perf script -f <fields>

 	is equivalent to:

 		perf script -f trace:<fields> -f sw:<fields> -f hw:<fields>

 	i.e., the specified fields apply to all event types if the type string
 	is not given.

 	The arguments are processed in the order received. A later usage can
 	reset a prior request. e.g.:

 		-f trace: -f comm,tid,time,ip,sym

 	The first -f suppresses trace events (field list is ""), but then the
 	second invocation sets the fields to comm,tid,time,ip,sym. In this case a
 	warning is given to the user:

 		"Overriding previous field request for all events."

 	Alternativey, consider the order:

 		-f comm,tid,time,ip,sym -f trace:

 	The first -f sets the fields for all events and the second -f
 	suppresses trace events. The user is given a warning message about
 	the override, and the result of the above is that only S/W and H/W
 	events are displayed with the given fields.

 	For the 'wildcard' option if a user selected field is invalid for an
 	event type, a message is displayed to the user that the option is
 	ignored for that type. For example:

 		$ perf script -f comm,tid,trace
 		'trace' not valid for hardware events. Ignoring.
 		'trace' not valid for software events. Ignoring.

 	Alternatively, if the type is given an invalid field is specified it
 	is an error. For example:

         perf script -v -f sw:comm,tid,trace
         'trace' not valid for software events.

 	At this point usage is displayed, and perf-script exits.

 	Finally, a user may not set fields to none for all event types.
 	i.e., -f "" is not allowed.

 -k::
 --vmlinux=<file>::
         vmlinux pathname

 --kallsyms=<file>::
         kallsyms pathname

 --symfs=<directory>::
         Look for files with symbols relative to this directory.

 -G::
 --hide-call-graph::
         When printing symbols do not display call chain.

 -C::
 --cpu:: Only report samples for the list of CPUs provided. Multiple CPUs can
 	be provided as a comma-separated list with no space: 0,1. Ranges of
 	CPUs are specified with -: 0-2. Default is to report samples on all
 	CPUs.

 -c::
 --comms=::
 	Only display events for these comms. CSV that understands
 	file://filename entries.

 -I::
 --show-info::
 	Display extended information about the perf.data file. This adds
 	information which may be very large and thus may clutter the display.
 	It currently includes: cpu and numa topology of the host system.
 	It can only be used with the perf script report mode.

 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-script-perl[1],
 linkperf:perf-script-python[1]
	perf-script(1)
	=============

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

	SYNOPSIS
	--------
	[verse]
	'perf script' [<options>]
	'perf script' [<options>] record <script> [<record-options>] <command>
	'perf script' [<options>] report <script> [script-args]
	'perf script' [<options>] <script> <required-script-args> [<record-options>] <command>
	'perf script' [<options>] <top-script> [script-args]

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

	There are several variants of perf script:

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

	'perf script record <script> <command>' to record the events required
	for 'perf script report'. <script> is the name displayed in the
	output of 'perf script --list' i.e. the actual script name minus any
	language extension. If <command> is not specified, the events are
	recorded using the -a (system-wide) 'perf record' option.

	'perf script report <script> [args]' 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 script
	record <script>' is used and should be present for this command to
	succeed. [args] refers to the (mainly optional) args expected by
	the script.

	'perf script <script> <required-script-args> <command>' to both
	record the events required for <script> and to run the <script>
	using 'live-mode' i.e. without writing anything to disk. <script>
	is the name displayed in the output of 'perf script --list' i.e. the
	actual script name minus any language extension. If <command> is
	not specified, the events are recorded using the -a (system-wide)
	'perf record' option. If <script> has any required args, they
	should be specified before <command>. This mode doesn't allow for
	optional script args to be specified; if optional script args are
	desired, they can be specified using separate 'perf script record'
	and 'perf script report' commands, with the stdout of the record step
	piped to the stdin of the report script, using the '-o -' and '-i -'
	options of the corresponding commands.

	'perf script <top-script>' to both record the events required for
	<top-script> and to run the <top-script> using 'live-mode'
	i.e. without writing anything to disk. <top-script> is the name
	displayed in the output of 'perf script --list' i.e. the actual
	script name minus any language extension; a <top-script> is defined
	as any script name ending with the string 'top'.

	[<record-options>] can be passed to the record steps of 'perf script
	record' and 'live-mode' variants; this isn't possible however for
	<top-script> 'live-mode' or 'perf script report' variants.

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

	OPTIONS
	-------
	<command>...::
	Any command you can specify in a shell.

	-D::
	--dump-raw-script=::
	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-script.[ext] starter script for given language,
	using current perf.data.

	-a::
	Force system-wide collection. Scripts run without a <command>
	normally use -a by default, while scripts run with a <command>
	normally don't - this option allows the latter to be run in
	system-wide mode.

	-i::
	--input=::
	Input file name. (default: perf.data unless stdin is a fifo)

	-d::
	--debug-mode::
	Do various checks like samples ordering and lost events.

	-f::
	--fields::
	Comma separated list of fields to print. Options are:
	comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr.
	Field list can be prepended with the type, trace, sw or hw,
	to indicate to which event type the field list applies.
	e.g., -f sw:comm,tid,time,ip,sym and -f trace:time,cpu,trace

	perf script -f <fields>

	is equivalent to:

	perf script -f trace:<fields> -f sw:<fields> -f hw:<fields>

	i.e., the specified fields apply to all event types if the type string
	is not given.

	The arguments are processed in the order received. A later usage can
	reset a prior request. e.g.:

	-f trace: -f comm,tid,time,ip,sym

	The first -f suppresses trace events (field list is ""), but then the
	second invocation sets the fields to comm,tid,time,ip,sym. In this case a
	warning is given to the user:

	"Overriding previous field request for all events."

	Alternativey, consider the order:

	-f comm,tid,time,ip,sym -f trace:

	The first -f sets the fields for all events and the second -f
	suppresses trace events. The user is given a warning message about
	the override, and the result of the above is that only S/W and H/W
	events are displayed with the given fields.

	For the 'wildcard' option if a user selected field is invalid for an
	event type, a message is displayed to the user that the option is
	ignored for that type. For example:

	$ perf script -f comm,tid,trace
	'trace' not valid for hardware events. Ignoring.
	'trace' not valid for software events. Ignoring.

	Alternatively, if the type is given an invalid field is specified it
	is an error. For example:

	perf script -v -f sw:comm,tid,trace
	'trace' not valid for software events.

	At this point usage is displayed, and perf-script exits.

	Finally, a user may not set fields to none for all event types.
	i.e., -f "" is not allowed.

	-k::
	--vmlinux=<file>::
	vmlinux pathname

	--kallsyms=<file>::
	kallsyms pathname

	--symfs=<directory>::
	Look for files with symbols relative to this directory.

	-G::
	--hide-call-graph::
	When printing symbols do not display call chain.

	-C::
	--cpu:: Only report samples for the list of CPUs provided. Multiple CPUs can
	be provided as a comma-separated list with no space: 0,1. Ranges of
	CPUs are specified with -: 0-2. Default is to report samples on all
	CPUs.

	-c::
	--comms=::
	Only display events for these comms. CSV that understands
	file://filename entries.

	-I::
	--show-info::
	Display extended information about the perf.data file. This adds
	information which may be very large and thus may clutter the display.
	It currently includes: cpu and numa topology of the host system.
	It can only be used with the perf script report mode.

	SEE ALSO
	--------
	linkperf:perf-record[1], linkperf:perf-script-perl[1],
	linkperf:perf-script-python[1]