1 perf-top(1) 1 perf-top(1)
2 =========== 2 ===========
3 3
4 NAME 4 NAME
5 ---- 5 ----
6 perf-top - System profiling tool. 6 perf-top - System profiling tool.
7 7
8 SYNOPSIS 8 SYNOPSIS
9 -------- 9 --------
10 [verse] 10 [verse]
11 'perf top' [-e <EVENT> | --event=EVENT] [<opti 11 'perf top' [-e <EVENT> | --event=EVENT] [<options>]
12 12
13 DESCRIPTION 13 DESCRIPTION
14 ----------- 14 -----------
15 This command generates and displays a performa 15 This command generates and displays a performance counter profile in real time.
16 16
17 17
18 OPTIONS 18 OPTIONS
19 ------- 19 -------
20 -a:: 20 -a::
21 --all-cpus:: 21 --all-cpus::
22 System-wide collection. (default) 22 System-wide collection. (default)
23 23
24 -c <count>:: 24 -c <count>::
25 --count=<count>:: 25 --count=<count>::
26 Event period to sample. 26 Event period to sample.
27 27
28 -C <cpu-list>:: 28 -C <cpu-list>::
29 --cpu=<cpu>:: 29 --cpu=<cpu>::
30 Monitor only on the list of CPUs provided. Mul 30 Monitor only on the list of CPUs provided. Multiple CPUs can be provided as a
31 comma-separated list with no space: 0,1. Range 31 comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2.
32 Default is to monitor all CPUS. 32 Default is to monitor all CPUS.
33 33
34 -d <seconds>:: 34 -d <seconds>::
35 --delay=<seconds>:: 35 --delay=<seconds>::
36 Number of seconds to delay between ref 36 Number of seconds to delay between refreshes.
37 37
38 -e <event>:: 38 -e <event>::
39 --event=<event>:: 39 --event=<event>::
40 Select the PMU event. Selection can be 40 Select the PMU event. Selection can be a symbolic event name
41 (use 'perf list' to list all events) o 41 (use 'perf list' to list all events) or a raw PMU event in the form
42 of rN where N is a hexadecimal value t 42 of rN where N is a hexadecimal value that represents the raw register
43 encoding with the layout of the event 43 encoding with the layout of the event control registers as described
44 by entries in /sys/bus/event_source/de 44 by entries in /sys/bus/event_source/devices/cpu/format/*.
45 45
46 --filter=<filter>:: 46 --filter=<filter>::
47 Event filter. This option should foll 47 Event filter. This option should follow an event selector (-e). For
48 syntax see linkperf:perf-record[1]. 48 syntax see linkperf:perf-record[1].
49 49
50 -E <entries>:: 50 -E <entries>::
51 --entries=<entries>:: 51 --entries=<entries>::
52 Display this many functions. 52 Display this many functions.
53 53
54 -f <count>:: 54 -f <count>::
55 --count-filter=<count>:: 55 --count-filter=<count>::
56 Only display functions with more event 56 Only display functions with more events than this.
57 57
58 --group-sort-idx:: 58 --group-sort-idx::
59 Sort the output by the event at the in 59 Sort the output by the event at the index n in group. If n is invalid,
60 sort by the first event. It can suppor 60 sort by the first event. It can support multiple groups with different
61 amount of events. WARNING: This should 61 amount of events. WARNING: This should be used on grouped events.
62 62
63 -F <freq>:: 63 -F <freq>::
64 --freq=<freq>:: 64 --freq=<freq>::
65 Profile at this frequency. Use 'max' t 65 Profile at this frequency. Use 'max' to use the currently maximum
66 allowed frequency, i.e. the value in t 66 allowed frequency, i.e. the value in the kernel.perf_event_max_sample_rate
67 sysctl. 67 sysctl.
68 68
69 -i:: 69 -i::
70 --inherit:: 70 --inherit::
71 Child tasks do not inherit counters. 71 Child tasks do not inherit counters.
72 72
73 -k <path>:: 73 -k <path>::
74 --vmlinux=<path>:: 74 --vmlinux=<path>::
75 Path to vmlinux. Required for annotat 75 Path to vmlinux. Required for annotation functionality.
76 76
77 --ignore-vmlinux:: 77 --ignore-vmlinux::
78 Ignore vmlinux files. 78 Ignore vmlinux files.
79 79
80 --kallsyms=<file>:: 80 --kallsyms=<file>::
81 kallsyms pathname 81 kallsyms pathname
82 82
83 -m <pages>:: 83 -m <pages>::
84 --mmap-pages=<pages>:: 84 --mmap-pages=<pages>::
85 Number of mmap data pages (must be a p 85 Number of mmap data pages (must be a power of two) or size
86 specification in bytes with appended u 86 specification in bytes with appended unit character - B/K/M/G.
87 The size is rounded up to the nearest 87 The size is rounded up to the nearest power-of-two page value.
88 88
89 -p <pid>:: 89 -p <pid>::
90 --pid=<pid>:: 90 --pid=<pid>::
91 Profile events on existing Process ID 91 Profile events on existing Process ID (comma separated list).
92 92
93 -t <tid>:: 93 -t <tid>::
94 --tid=<tid>:: 94 --tid=<tid>::
95 Profile events on existing thread ID ( 95 Profile events on existing thread ID (comma separated list).
96 96
97 -u:: 97 -u::
98 --uid=:: 98 --uid=::
99 Record events in threads owned by uid. 99 Record events in threads owned by uid. Name or number.
100 100
101 -r <priority>:: 101 -r <priority>::
102 --realtime=<priority>:: 102 --realtime=<priority>::
103 Collect data with this RT SCHED_FIFO p 103 Collect data with this RT SCHED_FIFO priority.
104 104
105 --sym-annotate=<symbol>:: 105 --sym-annotate=<symbol>::
106 Annotate this symbol. 106 Annotate this symbol.
107 107
108 -K:: 108 -K::
109 --hide_kernel_symbols:: 109 --hide_kernel_symbols::
110 Hide kernel symbols. 110 Hide kernel symbols.
111 111
112 -U:: 112 -U::
113 --hide_user_symbols:: 113 --hide_user_symbols::
114 Hide user symbols. 114 Hide user symbols.
115 115
116 --demangle-kernel:: 116 --demangle-kernel::
117 Demangle kernel symbols. 117 Demangle kernel symbols.
118 118
119 -D:: 119 -D::
120 --dump-symtab:: 120 --dump-symtab::
121 Dump the symbol table used for profili 121 Dump the symbol table used for profiling.
122 122
123 -v:: 123 -v::
124 --verbose:: 124 --verbose::
125 Be more verbose (show counter open err 125 Be more verbose (show counter open errors, etc).
126 126
127 -z:: 127 -z::
128 --zero:: 128 --zero::
129 Zero history across display updates. 129 Zero history across display updates.
130 130
131 -s:: 131 -s::
132 --sort:: 132 --sort::
133 Sort by key(s): pid, comm, dso, symbol 133 Sort by key(s): pid, comm, dso, symbol, parent, srcline, weight,
134 local_weight, abort, in_tx, transactio 134 local_weight, abort, in_tx, transaction, overhead, sample, period.
135 Please see description of --sort in th 135 Please see description of --sort in the perf-report man page.
136 136
137 --fields=:: 137 --fields=::
138 Specify output field - multiple keys c 138 Specify output field - multiple keys can be specified in CSV format.
139 Following fields are available: 139 Following fields are available:
140 overhead, overhead_sys, overhead_us, o 140 overhead, overhead_sys, overhead_us, overhead_children, sample and period.
141 Also it can contain any sort key(s). 141 Also it can contain any sort key(s).
142 142
143 By default, every sort keys not specif 143 By default, every sort keys not specified in --field will be appended
144 automatically. 144 automatically.
145 145
146 -n:: 146 -n::
147 --show-nr-samples:: 147 --show-nr-samples::
148 Show a column with the number of sampl 148 Show a column with the number of samples.
149 149
150 --show-total-period:: 150 --show-total-period::
151 Show a column with the sum of periods. 151 Show a column with the sum of periods.
152 152
153 --dsos:: 153 --dsos::
154 Only consider symbols in these dsos. 154 Only consider symbols in these dsos. This option will affect the
155 percentage of the overhead column. Se 155 percentage of the overhead column. See --percentage for more info.
156 156
157 --comms:: 157 --comms::
158 Only consider symbols in these comms. 158 Only consider symbols in these comms. This option will affect the
159 percentage of the overhead column. Se 159 percentage of the overhead column. See --percentage for more info.
160 160
161 --symbols:: 161 --symbols::
162 Only consider these symbols. This opt 162 Only consider these symbols. This option will affect the
163 percentage of the overhead column. Se 163 percentage of the overhead column. See --percentage for more info.
164 164
165 -M:: 165 -M::
166 --disassembler-style=:: Set disassembler style 166 --disassembler-style=:: Set disassembler style for objdump.
167 167
168 --addr2line=<path>:: 168 --addr2line=<path>::
169 Path to addr2line binary. 169 Path to addr2line binary.
170 170
171 --objdump=<path>:: 171 --objdump=<path>::
172 Path to objdump binary. 172 Path to objdump binary.
173 173
174 --prefix=PREFIX:: 174 --prefix=PREFIX::
175 --prefix-strip=N:: 175 --prefix-strip=N::
176 Remove first N entries from source fil 176 Remove first N entries from source file path names in executables
177 and add PREFIX. This allows to display 177 and add PREFIX. This allows to display source code compiled on systems
178 with different file system layout. 178 with different file system layout.
179 179
180 --source:: 180 --source::
181 Interleave source code with assembly c 181 Interleave source code with assembly code. Enabled by default,
182 disable with --no-source. 182 disable with --no-source.
183 183
184 --asm-raw:: 184 --asm-raw::
185 Show raw instruction encoding of assem 185 Show raw instruction encoding of assembly instructions.
186 186
187 -g:: 187 -g::
188 Enables call-graph (stack chain/backtr 188 Enables call-graph (stack chain/backtrace) recording.
189 189
190 --call-graph [mode,type,min[,limit],order[,key 190 --call-graph [mode,type,min[,limit],order[,key][,branch]]::
191 Setup and enable call-graph (stack cha 191 Setup and enable call-graph (stack chain/backtrace) recording,
192 implies -g. See `--call-graph` sectio 192 implies -g. See `--call-graph` section in perf-record and
193 perf-report man pages for details. 193 perf-report man pages for details.
194 194
195 --children:: 195 --children::
196 Accumulate callchain of children to pa 196 Accumulate callchain of children to parent entry so that then can
197 show up in the output. The output wil 197 show up in the output. The output will have a new "Children" column
198 and will be sorted on the data. It re 198 and will be sorted on the data. It requires -g/--call-graph option
199 enabled. See the `overhead calculatio 199 enabled. See the `overhead calculation' section for more details.
200 Enabled by default, disable with --no- 200 Enabled by default, disable with --no-children.
201 201
202 --max-stack:: 202 --max-stack::
203 Set the stack depth limit when parsing 203 Set the stack depth limit when parsing the callchain, anything
204 beyond the specified depth will be ign 204 beyond the specified depth will be ignored. This is a trade-off
205 between information loss and faster pr 205 between information loss and faster processing especially for
206 workloads that can have a very long ca 206 workloads that can have a very long callchain stack.
207 207
208 Default: /proc/sys/kernel/perf_event_m 208 Default: /proc/sys/kernel/perf_event_max_stack when present, 127 otherwise.
209 209
210 --ignore-callees=<regex>:: 210 --ignore-callees=<regex>::
211 Ignore callees of the function(s) matc 211 Ignore callees of the function(s) matching the given regex.
212 This has the effect of collecting the 212 This has the effect of collecting the callers of each such
213 function into one place in the call-gr 213 function into one place in the call-graph tree.
214 214
215 --percent-limit:: 215 --percent-limit::
216 Do not show entries which have an over 216 Do not show entries which have an overhead under that percent.
217 (Default: 0). 217 (Default: 0).
218 218
219 --percentage:: 219 --percentage::
220 Determine how to display the overhead 220 Determine how to display the overhead percentage of filtered entries.
221 Filters can be applied by --comms, --d 221 Filters can be applied by --comms, --dsos and/or --symbols options and
222 Zoom operations on the TUI (thread, ds 222 Zoom operations on the TUI (thread, dso, etc).
223 223
224 "relative" means it's relative to filt 224 "relative" means it's relative to filtered entries only so that the
225 sum of shown entries will be always 10 225 sum of shown entries will be always 100%. "absolute" means it retains
226 the original value before and after th 226 the original value before and after the filter is applied.
227 227
228 -w:: 228 -w::
229 --column-widths=<width[,width...]>:: 229 --column-widths=<width[,width...]>::
230 Force each column width to the provide 230 Force each column width to the provided list, for large terminal
231 readability. 0 means no limit (defaul 231 readability. 0 means no limit (default behavior).
232 232
233 --proc-map-timeout:: 233 --proc-map-timeout::
234 When processing pre-existing threads / 234 When processing pre-existing threads /proc/XXX/mmap, it may take
235 a long time, because the file may be h 235 a long time, because the file may be huge. A time out is needed
236 in such cases. 236 in such cases.
237 This option sets the time out limit. T 237 This option sets the time out limit. The default value is 500 ms.
238 238
239 239
240 -b:: 240 -b::
241 --branch-any:: 241 --branch-any::
242 Enable taken branch stack sampling. An 242 Enable taken branch stack sampling. Any type of taken branch may be sampled.
243 This is a shortcut for --branch-filter 243 This is a shortcut for --branch-filter any. See --branch-filter for more infos.
244 244
245 -j:: 245 -j::
246 --branch-filter:: 246 --branch-filter::
247 Enable taken branch stack sampling. Ea 247 Enable taken branch stack sampling. Each sample captures a series of consecutive
248 taken branches. The number of branches 248 taken branches. The number of branches captured with each sample depends on the
249 underlying hardware, the type of branc 249 underlying hardware, the type of branches of interest, and the executed code.
250 It is possible to select the types of 250 It is possible to select the types of branches captured by enabling filters.
251 For a full list of modifiers please se 251 For a full list of modifiers please see the perf record manpage.
252 252
253 The option requires at least one branc 253 The option requires at least one branch type among any, any_call, any_ret, ind_call, cond.
254 The privilege levels may be omitted, i 254 The privilege levels may be omitted, in which case, the privilege levels of the associated
255 event are applied to the branch filter 255 event are applied to the branch filter. Both kernel (k) and hypervisor (hv) privilege
256 levels are subject to permissions. Wh 256 levels are subject to permissions. When sampling on multiple events, branch stack sampling
257 is enabled for all the sampling events 257 is enabled for all the sampling events. The sampled branch type is the same for all events.
258 The various filters must be specified 258 The various filters must be specified as a comma separated list: --branch-filter any_ret,u,k
259 Note that this feature may not be avai 259 Note that this feature may not be available on all processors.
260 260
261 --branch-history:: 261 --branch-history::
262 Add the addresses of sampled taken bra 262 Add the addresses of sampled taken branches to the callstack.
263 This allows to examine the path the pr 263 This allows to examine the path the program took to each sample.
264 264
265 --raw-trace:: 265 --raw-trace::
266 When displaying traceevent output, do 266 When displaying traceevent output, do not use print fmt or plugins.
267 267
268 -H:: 268 -H::
269 --hierarchy:: 269 --hierarchy::
270 Enable hierarchical output. In the hi 270 Enable hierarchical output. In the hierarchy mode, each sort key groups
271 samples based on the criteria and then 271 samples based on the criteria and then sub-divide it using the lower
272 level sort key. 272 level sort key.
273 273
274 For example, in normal output: 274 For example, in normal output:
275 275
276 perf report -s dso,sym 276 perf report -s dso,sym
277 # 277 #
278 # Overhead Shared Object Symbo 278 # Overhead Shared Object Symbol
279 # ........ ................. ..... 279 # ........ ................. ...........
280 50.00% [kernel.kallsyms] [k] k 280 50.00% [kernel.kallsyms] [k] kfunc1
281 20.00% perf [.] f 281 20.00% perf [.] foo
282 15.00% [kernel.kallsyms] [k] k 282 15.00% [kernel.kallsyms] [k] kfunc2
283 10.00% perf [.] b 283 10.00% perf [.] bar
284 5.00% libc.so [.] l 284 5.00% libc.so [.] libcall
285 285
286 In hierarchy output: 286 In hierarchy output:
287 287
288 perf report -s dso,sym --hierarchy 288 perf report -s dso,sym --hierarchy
289 # 289 #
290 # Overhead Shared Object / Symbol 290 # Overhead Shared Object / Symbol
291 # .......... ...................... 291 # .......... ......................
292 65.00% [kernel.kallsyms] 292 65.00% [kernel.kallsyms]
293 50.00% [k] kfunc1 293 50.00% [k] kfunc1
294 15.00% [k] kfunc2 294 15.00% [k] kfunc2
295 30.00% perf 295 30.00% perf
296 20.00% [.] foo 296 20.00% [.] foo
297 10.00% [.] bar 297 10.00% [.] bar
298 5.00% libc.so 298 5.00% libc.so
299 5.00% [.] libcall 299 5.00% [.] libcall
300 300
301 --overwrite:: 301 --overwrite::
302 Enable this to use just the most recen 302 Enable this to use just the most recent records, which helps in high core count
303 machines such as Knights Landing/Mill, 303 machines such as Knights Landing/Mill, but right now is disabled by default as
304 the pausing used in this technique is 304 the pausing used in this technique is leading to loss of metadata events such
305 as PERF_RECORD_MMAP which makes 'perf 305 as PERF_RECORD_MMAP which makes 'perf top' unable to resolve samples, leading
306 to lots of unknown samples appearing o 306 to lots of unknown samples appearing on the UI. Enable this if you are in such
307 machines and profiling a workload that 307 machines and profiling a workload that doesn't creates short lived threads and/or
308 doesn't uses many executable mmap oper 308 doesn't uses many executable mmap operations. Work is being planed to solve
309 this situation, till then, this will r 309 this situation, till then, this will remain disabled by default.
310 310
311 --force:: 311 --force::
312 Don't do ownership validation. 312 Don't do ownership validation.
313 313
314 --num-thread-synthesize:: 314 --num-thread-synthesize::
315 The number of threads to run when synt 315 The number of threads to run when synthesizing events for existing processes.
316 By default, the number of threads equa 316 By default, the number of threads equals to the number of online CPUs.
317 317
318 --namespaces:: 318 --namespaces::
319 Record events of type PERF_RECORD_NAME 319 Record events of type PERF_RECORD_NAMESPACES and display it with the
320 'cgroup_id' sort key. 320 'cgroup_id' sort key.
321 321
322 -G name:: 322 -G name::
323 --cgroup name:: 323 --cgroup name::
324 monitor only in the container (cgroup) called 324 monitor only in the container (cgroup) called "name". This option is available only
325 in per-cpu mode. The cgroup filesystem must be 325 in per-cpu mode. The cgroup filesystem must be mounted. All threads belonging to
326 container "name" are monitored when they run o 326 container "name" are monitored when they run on the monitored CPUs. Multiple cgroups
327 can be provided. Each cgroup is applied to the 327 can be provided. Each cgroup is applied to the corresponding event, i.e., first cgroup
328 to first event, second cgroup to second event 328 to first event, second cgroup to second event and so on. It is possible to provide
329 an empty cgroup (monitor all the time) using, 329 an empty cgroup (monitor all the time) using, e.g., -G foo,,bar. Cgroups must have
330 corresponding events, i.e., they always refer 330 corresponding events, i.e., they always refer to events defined earlier on the command
331 line. If the user wants to track multiple even 331 line. If the user wants to track multiple events for a specific cgroup, the user can
332 use '-e e1 -e e2 -G foo,foo' or just use '-e e 332 use '-e e1 -e e2 -G foo,foo' or just use '-e e1 -e e2 -G foo'.
333 333
334 --all-cgroups:: 334 --all-cgroups::
335 Record events of type PERF_RECORD_CGRO 335 Record events of type PERF_RECORD_CGROUP and display it with the
336 'cgroup' sort key. 336 'cgroup' sort key.
337 337
338 --switch-on EVENT_NAME:: 338 --switch-on EVENT_NAME::
339 Only consider events after this event 339 Only consider events after this event is found.
340 340
341 E.g.: 341 E.g.:
342 342
343 Find out where broadcast packets ar 343 Find out where broadcast packets are handled
344 344
345 perf probe -L icmp_rcv 345 perf probe -L icmp_rcv
346 346
347 Insert a probe there: 347 Insert a probe there:
348 348
349 perf probe icmp_rcv:59 349 perf probe icmp_rcv:59
350 350
351 Start perf top and ask it to only c 351 Start perf top and ask it to only consider the cycles events when a
352 broadcast packet arrives This will 352 broadcast packet arrives This will show a menu with two entries and
353 will start counting when a broadcas 353 will start counting when a broadcast packet arrives:
354 354
355 perf top -e cycles,probe:icmp_ 355 perf top -e cycles,probe:icmp_rcv --switch-on=probe:icmp_rcv
356 356
357 Alternatively one can ask for a gro 357 Alternatively one can ask for a group and then two overhead columns
358 will appear, the first for cycles a 358 will appear, the first for cycles and the second for the switch-on event.
359 359
360 perf top -e '{cycles,probe:icm 360 perf top -e '{cycles,probe:icmp_rcv}' --switch-on=probe:icmp_rcv
361 361
362 This may be interesting to measure a w 362 This may be interesting to measure a workload only after some initialization
363 phase is over, i.e. insert a perf prob 363 phase is over, i.e. insert a perf probe at that point and use the above
364 examples replacing probe:icmp_rcv with 364 examples replacing probe:icmp_rcv with the just-after-init probe.
365 365
366 --switch-off EVENT_NAME:: 366 --switch-off EVENT_NAME::
367 Stop considering events after this eve 367 Stop considering events after this event is found.
368 368
369 --show-on-off-events:: 369 --show-on-off-events::
370 Show the --switch-on/off events too. T 370 Show the --switch-on/off events too. This has no effect in 'perf top' now
371 but probably we'll make the default no 371 but probably we'll make the default not to show the switch-on/off events
372 on the --group mode and if there is on 372 on the --group mode and if there is only one event besides the off/on ones,
373 go straight to the histogram browser, 373 go straight to the histogram browser, just like 'perf top' with no events
374 explicitly specified does. 374 explicitly specified does.
375 375
376 --stitch-lbr:: 376 --stitch-lbr::
377 Show callgraph with stitched LBRs, whi 377 Show callgraph with stitched LBRs, which may have more complete
378 callgraph. The option must be used wit 378 callgraph. The option must be used with --call-graph lbr recording.
379 Disabled by default. In common cases w 379 Disabled by default. In common cases with call stack overflows,
380 it can recreate better call stacks tha 380 it can recreate better call stacks than the default lbr call stack
381 output. But this approach is not foolp 381 output. But this approach is not foolproof. There can be cases
382 where it creates incorrect call stacks 382 where it creates incorrect call stacks from incorrect matches.
383 The known limitations include exceptio 383 The known limitations include exception handing such as
384 setjmp/longjmp will have calls/returns 384 setjmp/longjmp will have calls/returns not match.
385 385
386 ifdef::HAVE_LIBPFM[] 386 ifdef::HAVE_LIBPFM[]
387 --pfm-events events:: 387 --pfm-events events::
388 Select a PMU event using libpfm4 syntax (see h 388 Select a PMU event using libpfm4 syntax (see http://perfmon2.sf.net)
389 including support for event filters. For examp 389 including support for event filters. For example '--pfm-events
390 inst_retired:any_p:u:c=1:i'. More than one eve 390 inst_retired:any_p:u:c=1:i'. More than one event can be passed to the
391 option using the comma separator. Hardware eve 391 option using the comma separator. Hardware events and generic hardware
392 events cannot be mixed together. The latter mu 392 events cannot be mixed together. The latter must be used with the -e
393 option. The -e option and this one can be mixe 393 option. The -e option and this one can be mixed and matched. Events
394 can be grouped using the {} notation. 394 can be grouped using the {} notation.
395 endif::HAVE_LIBPFM[] 395 endif::HAVE_LIBPFM[]
396 396
397 INTERACTIVE PROMPTING KEYS 397 INTERACTIVE PROMPTING KEYS
398 -------------------------- 398 --------------------------
399 399
400 [d]:: 400 [d]::
401 Display refresh delay. 401 Display refresh delay.
402 402
403 [e]:: 403 [e]::
404 Number of entries to display. 404 Number of entries to display.
405 405
406 [E]:: 406 [E]::
407 Event to display when multiple counter 407 Event to display when multiple counters are active.
408 408
409 [f]:: 409 [f]::
410 Profile display filter (>= hit count). 410 Profile display filter (>= hit count).
411 411
412 [F]:: 412 [F]::
413 Annotation display filter (>= % of tot 413 Annotation display filter (>= % of total).
414 414
415 [s]:: 415 [s]::
416 Annotate symbol. 416 Annotate symbol.
417 417
418 [S]:: 418 [S]::
419 Stop annotation, return to full profil 419 Stop annotation, return to full profile display.
420 420
421 [K]:: 421 [K]::
422 Hide kernel symbols. 422 Hide kernel symbols.
423 423
424 [U]:: 424 [U]::
425 Hide user symbols. 425 Hide user symbols.
426 426
427 [z]:: 427 [z]::
428 Toggle event count zeroing across disp 428 Toggle event count zeroing across display updates.
429 429
430 [qQ]:: 430 [qQ]::
431 Quit. 431 Quit.
432 432
433 Pressing any unmapped key displays a menu, and 433 Pressing any unmapped key displays a menu, and prompts for input.
434 434
435 include::callchain-overhead-calculation.txt[] 435 include::callchain-overhead-calculation.txt[]
436 436
437 SEE ALSO 437 SEE ALSO
438 -------- 438 --------
439 linkperf:perf-stat[1], linkperf:perf-list[1], 439 linkperf:perf-stat[1], linkperf:perf-list[1], linkperf:perf-report[1]
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