1 perf-script(1) 1 perf-script(1)
2 ============= 2 =============
3 3
4 NAME 4 NAME
5 ---- 5 ----
6 perf-script - Read perf.data (created by perf 6 perf-script - Read perf.data (created by perf record) and display trace output
7 7
8 SYNOPSIS 8 SYNOPSIS
9 -------- 9 --------
10 [verse] 10 [verse]
11 'perf script' [<options>] 11 'perf script' [<options>]
12 'perf script' [<options>] record <script> [<re 12 'perf script' [<options>] record <script> [<record-options>] <command>
13 'perf script' [<options>] report <script> [scr 13 'perf script' [<options>] report <script> [script-args]
14 'perf script' [<options>] <script> <required-s 14 'perf script' [<options>] <script> <required-script-args> [<record-options>] <command>
15 'perf script' [<options>] <top-script> [script 15 'perf script' [<options>] <top-script> [script-args]
16 16
17 DESCRIPTION 17 DESCRIPTION
18 ----------- 18 -----------
19 This command reads the input file and displays 19 This command reads the input file and displays the trace recorded.
20 20
21 There are several variants of perf script: 21 There are several variants of perf script:
22 22
23 'perf script' to see a detailed trace of the 23 'perf script' to see a detailed trace of the workload that was
24 recorded. 24 recorded.
25 25
26 You can also run a set of pre-canned scripts 26 You can also run a set of pre-canned scripts that aggregate and
27 summarize the raw trace data in various ways 27 summarize the raw trace data in various ways (the list of scripts is
28 available via 'perf script -l'). The follow 28 available via 'perf script -l'). The following variants allow you to
29 record and run those scripts: 29 record and run those scripts:
30 30
31 'perf script record <script> <command>' to r 31 'perf script record <script> <command>' to record the events required
32 for 'perf script report'. <script> is the n 32 for 'perf script report'. <script> is the name displayed in the
33 output of 'perf script --list' i.e. the actu 33 output of 'perf script --list' i.e. the actual script name minus any
34 language extension. If <command> is not spe 34 language extension. If <command> is not specified, the events are
35 recorded using the -a (system-wide) 'perf re 35 recorded using the -a (system-wide) 'perf record' option.
36 36
37 'perf script report <script> [args]' to run 37 'perf script report <script> [args]' to run and display the results
38 of <script>. <script> is the name displayed 38 of <script>. <script> is the name displayed in the output of 'perf
39 script --list' i.e. the actual script name m 39 script --list' i.e. the actual script name minus any language
40 extension. The perf.data output from a prev 40 extension. The perf.data output from a previous run of 'perf script
41 record <script>' is used and should be prese 41 record <script>' is used and should be present for this command to
42 succeed. [args] refers to the (mainly optio 42 succeed. [args] refers to the (mainly optional) args expected by
43 the script. 43 the script.
44 44
45 'perf script <script> <required-script-args> 45 'perf script <script> <required-script-args> <command>' to both
46 record the events required for <script> and 46 record the events required for <script> and to run the <script>
47 using 'live-mode' i.e. without writing anyth 47 using 'live-mode' i.e. without writing anything to disk. <script>
48 is the name displayed in the output of 'perf 48 is the name displayed in the output of 'perf script --list' i.e. the
49 actual script name minus any language extens 49 actual script name minus any language extension. If <command> is
50 not specified, the events are recorded using 50 not specified, the events are recorded using the -a (system-wide)
51 'perf record' option. If <script> has any r 51 'perf record' option. If <script> has any required args, they
52 should be specified before <command>. This 52 should be specified before <command>. This mode doesn't allow for
53 optional script args to be specified; if opt 53 optional script args to be specified; if optional script args are
54 desired, they can be specified using separat 54 desired, they can be specified using separate 'perf script record'
55 and 'perf script report' commands, with the 55 and 'perf script report' commands, with the stdout of the record step
56 piped to the stdin of the report script, usi 56 piped to the stdin of the report script, using the '-o -' and '-i -'
57 options of the corresponding commands. 57 options of the corresponding commands.
58 58
59 'perf script <top-script>' to both record th 59 'perf script <top-script>' to both record the events required for
60 <top-script> and to run the <top-script> usi 60 <top-script> and to run the <top-script> using 'live-mode'
61 i.e. without writing anything to disk. <top 61 i.e. without writing anything to disk. <top-script> is the name
62 displayed in the output of 'perf script --li 62 displayed in the output of 'perf script --list' i.e. the actual
63 script name minus any language extension; a 63 script name minus any language extension; a <top-script> is defined
64 as any script name ending with the string 't 64 as any script name ending with the string 'top'.
65 65
66 [<record-options>] can be passed to the reco 66 [<record-options>] can be passed to the record steps of 'perf script
67 record' and 'live-mode' variants; this isn't 67 record' and 'live-mode' variants; this isn't possible however for
68 <top-script> 'live-mode' or 'perf script rep 68 <top-script> 'live-mode' or 'perf script report' variants.
69 69
70 See the 'SEE ALSO' section for links to lang 70 See the 'SEE ALSO' section for links to language-specific
71 information on how to write and run your own 71 information on how to write and run your own trace scripts.
72 72
73 OPTIONS 73 OPTIONS
74 ------- 74 -------
75 <command>...:: 75 <command>...::
76 Any command you can specify in a shell 76 Any command you can specify in a shell.
77 77
78 -D:: 78 -D::
79 --dump-raw-trace=:: 79 --dump-raw-trace=::
80 Display verbose dump of the trace data 80 Display verbose dump of the trace data.
81 81
82 --dump-unsorted-raw-trace=:: 82 --dump-unsorted-raw-trace=::
83 Same as --dump-raw-trace but not sorte 83 Same as --dump-raw-trace but not sorted in time order.
84 84
85 -L:: 85 -L::
86 --Latency=:: 86 --Latency=::
87 Show latency attributes (irqs/preempti 87 Show latency attributes (irqs/preemption disabled, etc).
88 88
89 -l:: 89 -l::
90 --list=:: 90 --list=::
91 Display a list of available trace scri 91 Display a list of available trace scripts.
92 92
93 -s ['lang']:: 93 -s ['lang']::
94 --script=:: 94 --script=::
95 Process trace data with the given scri 95 Process trace data with the given script ([lang]:script[.ext]).
96 If the string 'lang' is specified in p 96 If the string 'lang' is specified in place of a script name, a
97 list of supported languages will be di 97 list of supported languages will be displayed instead.
98 98
99 -g:: 99 -g::
100 --gen-script=:: 100 --gen-script=::
101 Generate perf-script.[ext] starter scr 101 Generate perf-script.[ext] starter script for given language,
102 using current perf.data. 102 using current perf.data.
103 103
104 --dlfilter=<file>:: 104 --dlfilter=<file>::
105 Filter sample events using the given s 105 Filter sample events using the given shared object file.
106 Refer linkperf:perf-dlfilter[1] 106 Refer linkperf:perf-dlfilter[1]
107 107
108 --dlarg=<arg>:: 108 --dlarg=<arg>::
109 Pass 'arg' as an argument to the dlfil 109 Pass 'arg' as an argument to the dlfilter. --dlarg may be repeated
110 to add more arguments. 110 to add more arguments.
111 111
112 --list-dlfilters:: 112 --list-dlfilters::
113 Display a list of available dlfilters. 113 Display a list of available dlfilters. Use with option -v (must come
114 before option --list-dlfilters) to sho 114 before option --list-dlfilters) to show long descriptions.
115 115
116 -a:: 116 -a::
117 Force system-wide collection. Scripts 117 Force system-wide collection. Scripts run without a <command>
118 normally use -a by default, while scri 118 normally use -a by default, while scripts run with a <command>
119 normally don't - this option allows th 119 normally don't - this option allows the latter to be run in
120 system-wide mode. 120 system-wide mode.
121 121
122 -i:: 122 -i::
123 --input=:: 123 --input=::
124 Input file name. (default: perf.data u 124 Input file name. (default: perf.data unless stdin is a fifo)
125 125
126 -d:: 126 -d::
127 --debug-mode:: 127 --debug-mode::
128 Do various checks like samples orderin 128 Do various checks like samples ordering and lost events.
129 129
130 -F:: 130 -F::
131 --fields:: 131 --fields::
132 Comma separated list of fields to prin 132 Comma separated list of fields to print. Options are:
133 comm, tid, pid, time, cpu, event, trac 133 comm, tid, pid, time, cpu, event, trace, ip, sym, dso, dsoff, addr, symoff,
134 srcline, period, iregs, uregs, brstack 134 srcline, period, iregs, uregs, brstack, brstacksym, flags, bpf-output,
135 brstackinsn, brstackinsnlen, brstackdi 135 brstackinsn, brstackinsnlen, brstackdisasm, brstackoff, callindent, insn, disasm,
136 insnlen, synth, phys_addr, metric, mis 136 insnlen, synth, phys_addr, metric, misc, srccode, ipc, data_page_size,
137 code_page_size, ins_lat, machine_pid, !! 137 code_page_size, ins_lat, machine_pid, vcpu, cgroup, retire_lat,
138 138
139 Field list can be prepended with the t 139 Field list can be prepended with the type, trace, sw or hw,
140 to indicate to which event type the fi 140 to indicate to which event type the field list applies.
141 e.g., -F sw:comm,tid,time,ip,sym and 141 e.g., -F sw:comm,tid,time,ip,sym and -F trace:time,cpu,trace
142 142
143 perf script -F <fields> 143 perf script -F <fields>
144 144
145 is equivalent to: 145 is equivalent to:
146 146
147 perf script -F trace:<fields> 147 perf script -F trace:<fields> -F sw:<fields> -F hw:<fields>
148 148
149 i.e., the specified fields apply to al 149 i.e., the specified fields apply to all event types if the type string
150 is not given. 150 is not given.
151 151
152 In addition to overriding fields, it i 152 In addition to overriding fields, it is also possible to add or remove
153 fields from the defaults. For example 153 fields from the defaults. For example
154 154
155 -F -cpu,+insn 155 -F -cpu,+insn
156 156
157 removes the cpu field and adds the ins 157 removes the cpu field and adds the insn field. Adding/removing fields
158 cannot be mixed with normal overriding 158 cannot be mixed with normal overriding.
159 159
160 The arguments are processed in the ord 160 The arguments are processed in the order received. A later usage can
161 reset a prior request. e.g.: 161 reset a prior request. e.g.:
162 162
163 -F trace: -F comm,tid,time,ip, 163 -F trace: -F comm,tid,time,ip,sym
164 164
165 The first -F suppresses trace events ( 165 The first -F suppresses trace events (field list is ""), but then the
166 second invocation sets the fields to c 166 second invocation sets the fields to comm,tid,time,ip,sym. In this case a
167 warning is given to the user: 167 warning is given to the user:
168 168
169 "Overriding previous field req 169 "Overriding previous field request for all events."
170 170
171 Alternatively, consider the order: 171 Alternatively, consider the order:
172 172
173 -F comm,tid,time,ip,sym -F tra 173 -F comm,tid,time,ip,sym -F trace:
174 174
175 The first -F sets the fields for all e 175 The first -F sets the fields for all events and the second -F
176 suppresses trace events. The user is g 176 suppresses trace events. The user is given a warning message about
177 the override, and the result of the ab 177 the override, and the result of the above is that only S/W and H/W
178 events are displayed with the given fi 178 events are displayed with the given fields.
179 179
180 It's possible tp add/remove fields onl 180 It's possible tp add/remove fields only for specific event type:
181 181
182 -Fsw:-cpu,-period 182 -Fsw:-cpu,-period
183 183
184 removes cpu and period from software e 184 removes cpu and period from software events.
185 185
186 For the 'wildcard' option if a user se 186 For the 'wildcard' option if a user selected field is invalid for an
187 event type, a message is displayed to 187 event type, a message is displayed to the user that the option is
188 ignored for that type. For example: 188 ignored for that type. For example:
189 189
190 $ perf script -F comm,tid,trac 190 $ perf script -F comm,tid,trace
191 'trace' not valid for hardware 191 'trace' not valid for hardware events. Ignoring.
192 'trace' not valid for software 192 'trace' not valid for software events. Ignoring.
193 193
194 Alternatively, if the type is given an 194 Alternatively, if the type is given an invalid field is specified it
195 is an error. For example: 195 is an error. For example:
196 196
197 perf script -v -F sw:comm,tid,trace 197 perf script -v -F sw:comm,tid,trace
198 'trace' not valid for software events. 198 'trace' not valid for software events.
199 199
200 At this point usage is displayed, and 200 At this point usage is displayed, and perf-script exits.
201 201
202 The flags field is synthesized and may 202 The flags field is synthesized and may have a value when Instruction
203 Trace decoding. The flags are "bcrosyi 203 Trace decoding. The flags are "bcrosyiABExghDt" which stand for branch,
204 call, return, conditional, system, asy 204 call, return, conditional, system, asynchronous, interrupt,
205 transaction abort, trace begin, trace 205 transaction abort, trace begin, trace end, in transaction, VM-Entry,
206 VM-Exit, interrupt disabled and interr 206 VM-Exit, interrupt disabled and interrupt disable toggle respectively.
207 Known combinations of flags are printe 207 Known combinations of flags are printed more nicely e.g.
208 "call" for "bc", "return" for "br", "j 208 "call" for "bc", "return" for "br", "jcc" for "bo", "jmp" for "b",
209 "int" for "bci", "iret" for "bri", "sy 209 "int" for "bci", "iret" for "bri", "syscall" for "bcs", "sysret" for "brs",
210 "async" for "by", "hw int" for "bcyi", 210 "async" for "by", "hw int" for "bcyi", "tx abrt" for "bA", "tr strt" for "bB",
211 "tr end" for "bE", "vmentry" for "bcg" 211 "tr end" for "bE", "vmentry" for "bcg", "vmexit" for "bch".
212 However the "x", "D" and "t" flags wil 212 However the "x", "D" and "t" flags will be displayed separately in those
213 cases e.g. "jcc (xD)" for a condit 213 cases e.g. "jcc (xD)" for a condition branch within a transaction
214 with interrupts disabled. Note, interr 214 with interrupts disabled. Note, interrupts becoming disabled is "t",
215 whereas interrupts becoming enabled is 215 whereas interrupts becoming enabled is "Dt".
216 216
217 The callindent field is synthesized an 217 The callindent field is synthesized and may have a value when
218 Instruction Trace decoding. For calls 218 Instruction Trace decoding. For calls and returns, it will display the
219 name of the symbol indented with space 219 name of the symbol indented with spaces to reflect the stack depth.
220 220
221 When doing instruction trace decoding, 221 When doing instruction trace decoding, insn, disasm and insnlen give the
222 instruction bytes, disassembled instru 222 instruction bytes, disassembled instructions (requires libcapstone support)
223 and the instruction length of the curr 223 and the instruction length of the current instruction respectively.
224 224
225 The synth field is used by synthesized 225 The synth field is used by synthesized events which may be created when
226 Instruction Trace decoding. 226 Instruction Trace decoding.
227 227
228 The ipc (instructions per cycle) field 228 The ipc (instructions per cycle) field is synthesized and may have a value when
229 Instruction Trace decoding. 229 Instruction Trace decoding.
230 230
231 The machine_pid and vcpu fields are de 231 The machine_pid and vcpu fields are derived from data resulting from using
232 perf inject to insert a perf.data file 232 perf inject to insert a perf.data file recorded inside a virtual machine into
233 a perf.data file recorded on the host 233 a perf.data file recorded on the host at the same time.
234 234
235 The cgroup fields requires sample havi 235 The cgroup fields requires sample having the cgroup id which is saved
236 when "--all-cgroups" option is passed 236 when "--all-cgroups" option is passed to 'perf record'.
237 237
238 Finally, a user may not set fields to 238 Finally, a user may not set fields to none for all event types.
239 i.e., -F "" is not allowed. 239 i.e., -F "" is not allowed.
240 240
241 The brstack output includes branch rel 241 The brstack output includes branch related information with raw addresses using the
242 /v/v/v/v/cycles syntax in the followin 242 /v/v/v/v/cycles syntax in the following order:
243 FROM: branch source instruction 243 FROM: branch source instruction
244 TO : branch target instruction 244 TO : branch target instruction
245 M/P/-: M=branch target mispredicted or 245 M/P/-: M=branch target mispredicted or branch direction was mispredicted, P=target predicted or direction predicted, -=not supported
246 X/- : X=branch inside a transactional 246 X/- : X=branch inside a transactional region, -=not in transaction region or not supported
247 A/- : A=TSX abort entry, -=not aborted 247 A/- : A=TSX abort entry, -=not aborted region or not supported
248 cycles 248 cycles
249 249
250 The brstacksym is identical to brstack 250 The brstacksym is identical to brstack, except that the FROM and TO addresses are printed in a symbolic form if possible.
251 251
252 When brstackinsn is specified the full 252 When brstackinsn is specified the full assembler sequences of branch sequences for each sample
253 is printed. This is the full execution 253 is printed. This is the full execution path leading to the sample. This is only supported when the
254 sample was recorded with perf record - 254 sample was recorded with perf record -b or -j any.
255 255
256 Use brstackinsnlen to print the brstac 256 Use brstackinsnlen to print the brstackinsn lenght. For example, you
257 can’t know the next sequential instr 257 can’t know the next sequential instruction after an unconditional branch unless
258 you calculate that based on its length 258 you calculate that based on its length.
259 259
260 brstackdisasm acts like brstackinsn, b 260 brstackdisasm acts like brstackinsn, but will print disassembled instructions if
261 perf is built with the capstone librar 261 perf is built with the capstone library.
262 262
263 The brstackoff field will print an off 263 The brstackoff field will print an offset into a specific dso/binary.
264 264
265 With the metric option perf script can 265 With the metric option perf script can compute metrics for
266 sampling periods, similar to perf stat 266 sampling periods, similar to perf stat. This requires
267 specifying a group with multiple event 267 specifying a group with multiple events defining metrics with the :S option
268 for perf record. perf will sample on t 268 for perf record. perf will sample on the first event, and
269 print computed metrics for all the eve 269 print computed metrics for all the events in the group. Please note
270 that the metric computed is averaged o 270 that the metric computed is averaged over the whole sampling
271 period (since the last sample), not ju 271 period (since the last sample), not just for the sample point.
272 272
273 For sample events it's possible to dis 273 For sample events it's possible to display misc field with -F +misc option,
274 following letters are displayed for ea 274 following letters are displayed for each bit:
275 275
276 PERF_RECORD_MISC_KERNEL 276 PERF_RECORD_MISC_KERNEL K
277 PERF_RECORD_MISC_USER 277 PERF_RECORD_MISC_USER U
278 PERF_RECORD_MISC_HYPERVISOR 278 PERF_RECORD_MISC_HYPERVISOR H
279 PERF_RECORD_MISC_GUEST_KERNEL 279 PERF_RECORD_MISC_GUEST_KERNEL G
280 PERF_RECORD_MISC_GUEST_USER 280 PERF_RECORD_MISC_GUEST_USER g
281 PERF_RECORD_MISC_MMAP_DATA* 281 PERF_RECORD_MISC_MMAP_DATA* M
282 PERF_RECORD_MISC_COMM_EXEC 282 PERF_RECORD_MISC_COMM_EXEC E
283 PERF_RECORD_MISC_SWITCH_OUT 283 PERF_RECORD_MISC_SWITCH_OUT S
284 PERF_RECORD_MISC_SWITCH_OUT_PREEMPT 284 PERF_RECORD_MISC_SWITCH_OUT_PREEMPT Sp
285 285
286 $ perf script -F +misc ... 286 $ perf script -F +misc ...
287 sched-messaging 1414 K 28690.6 287 sched-messaging 1414 K 28690.636582: 4590 cycles ...
288 sched-messaging 1407 U 28690.6 288 sched-messaging 1407 U 28690.636600: 325620 cycles ...
289 sched-messaging 1414 K 28690.6 289 sched-messaging 1414 K 28690.636608: 19473 cycles ...
290 misc field ___________/ 290 misc field ___________/
291 291
292 -k:: 292 -k::
293 --vmlinux=<file>:: 293 --vmlinux=<file>::
294 vmlinux pathname 294 vmlinux pathname
295 295
296 --kallsyms=<file>:: 296 --kallsyms=<file>::
297 kallsyms pathname 297 kallsyms pathname
298 298
299 --symfs=<directory>:: 299 --symfs=<directory>::
300 Look for files with symbols relative t 300 Look for files with symbols relative to this directory.
301 301
302 -G:: 302 -G::
303 --hide-call-graph:: 303 --hide-call-graph::
304 When printing symbols do not display c 304 When printing symbols do not display call chain.
305 305
306 --stop-bt:: 306 --stop-bt::
307 Stop display of callgraph at these sym 307 Stop display of callgraph at these symbols
308 308
309 -C:: 309 -C::
310 --cpu:: Only report samples for the list of CP 310 --cpu:: Only report samples for the list of CPUs provided. Multiple CPUs can
311 be provided as a comma-separated list 311 be provided as a comma-separated list with no space: 0,1. Ranges of
312 CPUs are specified with -: 0-2. Defaul 312 CPUs are specified with -: 0-2. Default is to report samples on all
313 CPUs. 313 CPUs.
314 314
315 -c:: 315 -c::
316 --comms=:: 316 --comms=::
317 Only display events for these comms. C 317 Only display events for these comms. CSV that understands
318 file://filename entries. 318 file://filename entries.
319 319
320 --pid=:: 320 --pid=::
321 Only show events for given process ID 321 Only show events for given process ID (comma separated list).
322 322
323 --tid=:: 323 --tid=::
324 Only show events for given thread ID ( 324 Only show events for given thread ID (comma separated list).
325 325
326 -I:: 326 -I::
327 --show-info:: 327 --show-info::
328 Display extended information about the 328 Display extended information about the perf.data file. This adds
329 information which may be very large an 329 information which may be very large and thus may clutter the display.
330 It currently includes: cpu and numa to 330 It currently includes: cpu and numa topology of the host system.
331 It can only be used with the perf scri 331 It can only be used with the perf script report mode.
332 332
333 --show-kernel-path:: 333 --show-kernel-path::
334 Try to resolve the path of [kernel.kal 334 Try to resolve the path of [kernel.kallsyms]
335 335
336 --show-task-events 336 --show-task-events
337 Display task related events (e.g. FORK 337 Display task related events (e.g. FORK, COMM, EXIT).
338 338
339 --show-mmap-events 339 --show-mmap-events
340 Display mmap related events (e.g. MMAP 340 Display mmap related events (e.g. MMAP, MMAP2).
341 341
342 --show-namespace-events 342 --show-namespace-events
343 Display namespace events i.e. events o 343 Display namespace events i.e. events of type PERF_RECORD_NAMESPACES.
344 344
345 --show-switch-events 345 --show-switch-events
346 Display context switch events i.e. eve 346 Display context switch events i.e. events of type PERF_RECORD_SWITCH or
347 PERF_RECORD_SWITCH_CPU_WIDE. 347 PERF_RECORD_SWITCH_CPU_WIDE.
348 348
349 --show-lost-events 349 --show-lost-events
350 Display lost events i.e. events of typ 350 Display lost events i.e. events of type PERF_RECORD_LOST.
351 351
352 --show-round-events 352 --show-round-events
353 Display finished round events i.e. eve 353 Display finished round events i.e. events of type PERF_RECORD_FINISHED_ROUND.
354 354
355 --show-bpf-events 355 --show-bpf-events
356 Display bpf events i.e. events of type 356 Display bpf events i.e. events of type PERF_RECORD_KSYMBOL and PERF_RECORD_BPF_EVENT.
357 357
358 --show-cgroup-events 358 --show-cgroup-events
359 Display cgroup events i.e. events of t 359 Display cgroup events i.e. events of type PERF_RECORD_CGROUP.
360 360
361 --show-text-poke-events 361 --show-text-poke-events
362 Display text poke events i.e. events o 362 Display text poke events i.e. events of type PERF_RECORD_TEXT_POKE and
363 PERF_RECORD_KSYMBOL. 363 PERF_RECORD_KSYMBOL.
364 364
365 --demangle:: 365 --demangle::
366 Demangle symbol names to human readabl 366 Demangle symbol names to human readable form. It's enabled by default,
367 disable with --no-demangle. 367 disable with --no-demangle.
368 368
369 --demangle-kernel:: 369 --demangle-kernel::
370 Demangle kernel symbol names to human 370 Demangle kernel symbol names to human readable form (for C++ kernels).
371 <<
372 --addr2line=<path>:: <<
373 Path to addr2line binary. <<
374 371
375 --header 372 --header
376 Show perf.data header. 373 Show perf.data header.
377 374
378 --header-only 375 --header-only
379 Show only perf.data header. 376 Show only perf.data header.
380 377
381 --itrace:: 378 --itrace::
382 Options for decoding instruction traci 379 Options for decoding instruction tracing data. The options are:
383 380
384 include::itrace.txt[] 381 include::itrace.txt[]
385 382
386 To disable decoding entirely, use --no 383 To disable decoding entirely, use --no-itrace.
387 384
388 --full-source-path:: 385 --full-source-path::
389 Show the full path for source files fo 386 Show the full path for source files for srcline output.
390 387
391 --max-stack:: 388 --max-stack::
392 Set the stack depth limit when parsing 389 Set the stack depth limit when parsing the callchain, anything
393 beyond the specified depth will be ign 390 beyond the specified depth will be ignored. This is a trade-off
394 between information loss and faster pr 391 between information loss and faster processing especially for
395 workloads that can have a very long ca 392 workloads that can have a very long callchain stack.
396 Note that when using the --itrace opti 393 Note that when using the --itrace option the synthesized callchain size
397 will override this value if the synthe 394 will override this value if the synthesized callchain size is bigger.
398 395
399 Default: 127 396 Default: 127
400 397
401 --ns:: 398 --ns::
402 Use 9 decimal places when displaying t 399 Use 9 decimal places when displaying time (i.e. show the nanoseconds)
403 400
404 -f:: 401 -f::
405 --force:: 402 --force::
406 Don't do ownership validation. 403 Don't do ownership validation.
407 404
408 --time:: 405 --time::
409 Only analyze samples within given time 406 Only analyze samples within given time window: <start>,<stop>. Times
410 have the format seconds.nanoseconds. I 407 have the format seconds.nanoseconds. If start is not given (i.e. time
411 string is ',x.y') then analysis starts 408 string is ',x.y') then analysis starts at the beginning of the file. If
412 stop time is not given (i.e. time stri 409 stop time is not given (i.e. time string is 'x.y,') then analysis goes
413 to end of file. Multiple ranges can be 410 to end of file. Multiple ranges can be separated by spaces, which
414 requires the argument to be quoted e.g 411 requires the argument to be quoted e.g. --time "1234.567,1234.789 1235,"
415 412
416 Also support time percent with multipl 413 Also support time percent with multiple time ranges. Time string is
417 'a%/n,b%/m,...' or 'a%-b%,c%-%d,...'. 414 'a%/n,b%/m,...' or 'a%-b%,c%-%d,...'.
418 415
419 For example: 416 For example:
420 Select the second 10% time slice: 417 Select the second 10% time slice:
421 perf script --time 10%/2 418 perf script --time 10%/2
422 419
423 Select from 0% to 10% time slice: 420 Select from 0% to 10% time slice:
424 perf script --time 0%-10% 421 perf script --time 0%-10%
425 422
426 Select the first and second 10% time s 423 Select the first and second 10% time slices:
427 perf script --time 10%/1,10%/2 424 perf script --time 10%/1,10%/2
428 425
429 Select from 0% to 10% and 30% to 40% s 426 Select from 0% to 10% and 30% to 40% slices:
430 perf script --time 0%-10%,30%-40% 427 perf script --time 0%-10%,30%-40%
431 428
432 --max-blocks:: 429 --max-blocks::
433 Set the maximum number of program bloc 430 Set the maximum number of program blocks to print with brstackinsn for
434 each sample. 431 each sample.
435 432
436 --reltime:: 433 --reltime::
437 Print time stamps relative to trace st 434 Print time stamps relative to trace start.
438 435
439 --deltatime:: 436 --deltatime::
440 Print time stamps relative to previous 437 Print time stamps relative to previous event.
441 438
442 --per-event-dump:: 439 --per-event-dump::
443 Create per event files with a "perf.da 440 Create per event files with a "perf.data.EVENT.dump" name instead of
444 printing to stdout, useful, for instan 441 printing to stdout, useful, for instance, for generating flamegraphs.
445 442
446 --inline:: 443 --inline::
447 If a callgraph address belongs to an i 444 If a callgraph address belongs to an inlined function, the inline stack
448 will be printed. Each entry has functi 445 will be printed. Each entry has function name and file/line. Enabled by
449 default, disable with --no-inline. 446 default, disable with --no-inline.
450 447
451 --insn-trace[=<raw|disasm>]:: 448 --insn-trace[=<raw|disasm>]::
452 Show instruction stream in bytes (raw) 449 Show instruction stream in bytes (raw) or disassembled (disasm)
453 for intel_pt traces. The default is 'r 450 for intel_pt traces. The default is 'raw'. To use xed, combine
454 'raw' with --xed to show disassembly d 451 'raw' with --xed to show disassembly done by xed.
455 452
456 --xed:: 453 --xed::
457 Run xed disassembler on output. Requir 454 Run xed disassembler on output. Requires installing the xed disassembler.
458 455
459 -S:: 456 -S::
460 --symbols=symbol[,symbol...]:: 457 --symbols=symbol[,symbol...]::
461 Only consider the listed symbols. Symb 458 Only consider the listed symbols. Symbols are typically a name
462 but they may also be hexadecimal addre 459 but they may also be hexadecimal address.
463 460
464 The hexadecimal address may be the sta 461 The hexadecimal address may be the start address of a symbol or
465 any other address to filter the trace 462 any other address to filter the trace records
466 463
467 For example, to select the symbol nopl 464 For example, to select the symbol noploop or the address 0x4007a0:
468 perf script --symbols=noploop,0x4007a0 465 perf script --symbols=noploop,0x4007a0
469 466
470 Support filtering trace records by sym 467 Support filtering trace records by symbol name, start address of
471 symbol, any hexadecimal address and ad 468 symbol, any hexadecimal address and address range.
472 469
473 The comparison order is: 470 The comparison order is:
474 471
475 1. symbol name comparison 472 1. symbol name comparison
476 2. symbol start address comparison. 473 2. symbol start address comparison.
477 3. any hexadecimal address comparison. 474 3. any hexadecimal address comparison.
478 4. address range comparison (see --add 475 4. address range comparison (see --addr-range).
479 476
480 --addr-range:: 477 --addr-range::
481 Use with -S or --symbols to list traced 478 Use with -S or --symbols to list traced records within address range.
482 479
483 For example, to list the traced records 480 For example, to list the traced records within the address range
484 [0x4007a0, 0x0x4007a9]: 481 [0x4007a0, 0x0x4007a9]:
485 perf script -S 0x4007a0 --addr-range 10 482 perf script -S 0x4007a0 --addr-range 10
486 483
487 --dsos=:: 484 --dsos=::
488 Only consider symbols in these DSOs. 485 Only consider symbols in these DSOs.
489 486
490 --call-trace:: 487 --call-trace::
491 Show call stream for intel_pt traces. 488 Show call stream for intel_pt traces. The CPUs are interleaved, but
492 can be filtered with -C. 489 can be filtered with -C.
493 490
494 --call-ret-trace:: 491 --call-ret-trace::
495 Show call and return stream for intel_ 492 Show call and return stream for intel_pt traces.
496 493
497 --graph-function:: 494 --graph-function::
498 For itrace only show specified functio 495 For itrace only show specified functions and their callees for
499 itrace. Multiple functions can be sepa 496 itrace. Multiple functions can be separated by comma.
500 497
501 --switch-on EVENT_NAME:: 498 --switch-on EVENT_NAME::
502 Only consider events after this event 499 Only consider events after this event is found.
503 500
504 --switch-off EVENT_NAME:: 501 --switch-off EVENT_NAME::
505 Stop considering events after this eve 502 Stop considering events after this event is found.
506 503
507 --show-on-off-events:: 504 --show-on-off-events::
508 Show the --switch-on/off events too. 505 Show the --switch-on/off events too.
509 506
510 --stitch-lbr:: 507 --stitch-lbr::
511 Show callgraph with stitched LBRs, whi 508 Show callgraph with stitched LBRs, which may have more complete
512 callgraph. The perf.data file must hav 509 callgraph. The perf.data file must have been obtained using
513 perf record --call-graph lbr. 510 perf record --call-graph lbr.
514 Disabled by default. In common cases w 511 Disabled by default. In common cases with call stack overflows,
515 it can recreate better call stacks tha 512 it can recreate better call stacks than the default lbr call stack
516 output. But this approach is not foolp 513 output. But this approach is not foolproof. There can be cases
517 where it creates incorrect call stacks 514 where it creates incorrect call stacks from incorrect matches.
518 The known limitations include exceptio 515 The known limitations include exception handing such as
519 setjmp/longjmp will have calls/returns 516 setjmp/longjmp will have calls/returns not match.
520 517
521 :GMEXAMPLECMD: script 518 :GMEXAMPLECMD: script
522 :GMEXAMPLESUBCMD: 519 :GMEXAMPLESUBCMD:
523 include::guest-files.txt[] 520 include::guest-files.txt[]
524 521
525 SEE ALSO 522 SEE ALSO
526 -------- 523 --------
527 linkperf:perf-record[1], linkperf:perf-script- 524 linkperf:perf-record[1], linkperf:perf-script-perl[1],
528 linkperf:perf-script-python[1], linkperf:perf- 525 linkperf:perf-script-python[1], linkperf:perf-intel-pt[1],
529 linkperf:perf-dlfilter[1] 526 linkperf:perf-dlfilter[1]
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.