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