Commit | Line | Data |
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7d685243 TS |
1 | perf-config(1) |
2 | ============== | |
3 | ||
4 | NAME | |
5 | ---- | |
6 | perf-config - Get and set variables in a configuration file. | |
7 | ||
8 | SYNOPSIS | |
9 | -------- | |
10 | [verse] | |
c6fc018a | 11 | 'perf config' [<file-option>] [section.name[=value] ...] |
90923608 | 12 | or |
c7ac2417 | 13 | 'perf config' [<file-option>] -l | --list |
7d685243 TS |
14 | |
15 | DESCRIPTION | |
16 | ----------- | |
17 | You can manage variables in a configuration file with this command. | |
18 | ||
19 | OPTIONS | |
20 | ------- | |
21 | ||
22 | -l:: | |
23 | --list:: | |
24 | Show current config variables, name and value, for all sections. | |
25 | ||
c7ac2417 TS |
26 | --user:: |
27 | For writing and reading options: write to user | |
28 | '$HOME/.perfconfig' file or read it. | |
29 | ||
30 | --system:: | |
31 | For writing and reading options: write to system-wide | |
32 | '$(sysconfdir)/perfconfig' or read it. | |
33 | ||
7d685243 TS |
34 | CONFIGURATION FILE |
35 | ------------------ | |
36 | ||
37 | The perf configuration file contains many variables to change various | |
38 | aspects of each of its tools, including output, disk usage, etc. | |
39 | The '$HOME/.perfconfig' file is used to store a per-user configuration. | |
40 | The file '$(sysconfdir)/perfconfig' can be used to | |
41 | store a system-wide default configuration. | |
42 | ||
5de9e5fd ACM |
43 | One an disable reading config files by setting the PERF_CONFIG environment |
44 | variable to /dev/null, or provide an alternate config file by setting that | |
45 | variable. | |
46 | ||
c7ac2417 TS |
47 | When reading or writing, the values are read from the system and user |
48 | configuration files by default, and options '--system' and '--user' | |
49 | can be used to tell the command to read from or write to only that location. | |
50 | ||
7d685243 TS |
51 | Syntax |
52 | ~~~~~~ | |
53 | ||
54 | The file consist of sections. A section starts with its name | |
55 | surrounded by square brackets and continues till the next section | |
56 | begins. Each variable must be in a section, and have the form | |
57 | 'name = value', for example: | |
58 | ||
59 | [section] | |
60 | name1 = value1 | |
61 | name2 = value2 | |
62 | ||
63 | Section names are case sensitive and can contain any characters except | |
64 | newline (double quote `"` and backslash have to be escaped as `\"` and `\\`, | |
65 | respectively). Section headers can't span multiple lines. | |
66 | ||
67 | Example | |
68 | ~~~~~~~ | |
69 | ||
70 | Given a $HOME/.perfconfig like this: | |
71 | ||
72 | # | |
73 | # This is the config file, and | |
74 | # a '#' and ';' character indicates a comment | |
75 | # | |
76 | ||
77 | [colors] | |
78 | # Color variables | |
79 | top = red, default | |
80 | medium = green, default | |
81 | normal = lightgray, default | |
82 | selected = white, lightgray | |
78ce08df | 83 | jump_arrows = blue, default |
7d685243 TS |
84 | addr = magenta, default |
85 | root = white, blue | |
86 | ||
87 | [tui] | |
88 | # Defaults if linked with libslang | |
89 | report = on | |
90 | annotate = on | |
91 | top = on | |
92 | ||
93 | [buildid] | |
94 | # Default, disable using /dev/null | |
95 | dir = ~/.debug | |
96 | ||
97 | [annotate] | |
98 | # Defaults | |
99 | hide_src_code = false | |
100 | use_offset = true | |
101 | jump_arrows = true | |
102 | show_nr_jumps = false | |
103 | ||
104 | [help] | |
105 | # Format can be man, info, web or html | |
106 | format = man | |
107 | autocorrect = 0 | |
108 | ||
109 | [ui] | |
110 | show-headers = true | |
111 | ||
112 | [call-graph] | |
113 | # fp (framepointer), dwarf | |
114 | record-mode = fp | |
115 | print-type = graph | |
116 | order = caller | |
117 | sort-key = function | |
118 | ||
893c5c79 MW |
119 | [report] |
120 | # Defaults | |
9b40dff7 | 121 | sort_order = comm,dso,symbol |
893c5c79 MW |
122 | percent-limit = 0 |
123 | queue-size = 0 | |
124 | children = true | |
125 | group = true | |
126 | ||
55fa8b8c CD |
127 | [llvm] |
128 | dump-obj = true | |
129 | clang-opt = -g | |
130 | ||
c6fc018a TS |
131 | You can hide source code of annotate feature setting the config to false with |
132 | ||
133 | % perf config annotate.hide_src_code=true | |
134 | ||
135 | If you want to add or modify several config items, you can do like | |
136 | ||
137 | % perf config ui.show-headers=false kmem.default=slab | |
138 | ||
139 | To modify the sort order of report functionality in user config file(i.e. `~/.perfconfig`), do | |
140 | ||
141 | % perf config --user report sort-order=srcline | |
142 | ||
143 | To change colors of selected line to other foreground and background colors | |
144 | in system config file (i.e. `$(sysconf)/perfconfig`), do | |
145 | ||
146 | % perf config --system colors.selected=yellow,green | |
147 | ||
90923608 TS |
148 | To query the record mode of call graph, do |
149 | ||
150 | % perf config call-graph.record-mode | |
151 | ||
152 | If you want to know multiple config key/value pairs, you can do like | |
153 | ||
154 | % perf config report.queue-size call-graph.order report.children | |
155 | ||
156 | To query the config value of sort order of call graph in user config file (i.e. `~/.perfconfig`), do | |
157 | ||
158 | % perf config --user call-graph.sort-order | |
159 | ||
160 | To query the config value of buildid directory in system config file (i.e. `$(sysconf)/perfconfig`), do | |
161 | ||
162 | % perf config --system buildid.dir | |
163 | ||
89debf17 TS |
164 | Variables |
165 | ~~~~~~~~~ | |
166 | ||
167 | colors.*:: | |
168 | The variables for customizing the colors used in the output for the | |
169 | 'report', 'top' and 'annotate' in the TUI. They should specify the | |
170 | foreground and background colors, separated by a comma, for example: | |
171 | ||
172 | medium = green, lightgray | |
173 | ||
174 | If you want to use the color configured for you terminal, just leave it | |
175 | as 'default', for example: | |
176 | ||
177 | medium = default, lightgray | |
178 | ||
179 | Available colors: | |
180 | red, yellow, green, cyan, gray, black, blue, | |
181 | white, default, magenta, lightgray | |
182 | ||
183 | colors.top:: | |
184 | 'top' means a overhead percentage which is more than 5%. | |
185 | And values of this variable specify percentage colors. | |
186 | Basic key values are foreground-color 'red' and | |
187 | background-color 'default'. | |
188 | colors.medium:: | |
189 | 'medium' means a overhead percentage which has more than 0.5%. | |
190 | Default values are 'green' and 'default'. | |
191 | colors.normal:: | |
192 | 'normal' means the rest of overhead percentages | |
193 | except 'top', 'medium', 'selected'. | |
194 | Default values are 'lightgray' and 'default'. | |
195 | colors.selected:: | |
196 | This selects the colors for the current entry in a list of entries | |
197 | from sub-commands (top, report, annotate). | |
198 | Default values are 'black' and 'lightgray'. | |
199 | colors.jump_arrows:: | |
200 | Colors for jump arrows on assembly code listings | |
201 | such as 'jns', 'jmp', 'jane', etc. | |
202 | Default values are 'blue', 'default'. | |
203 | colors.addr:: | |
204 | This selects colors for addresses from 'annotate'. | |
205 | Default values are 'magenta', 'default'. | |
206 | colors.root:: | |
207 | Colors for headers in the output of a sub-commands (top, report). | |
208 | Default values are 'white', 'blue'. | |
209 | ||
3fcb10e4 MD |
210 | core.*:: |
211 | core.proc-map-timeout:: | |
212 | Sets a timeout (in milliseconds) for parsing /proc/<pid>/maps files. | |
213 | Can be overridden by the --proc-map-timeout option on supported | |
214 | subcommands. The default timeout is 500ms. | |
215 | ||
3fa9f407 TS |
216 | tui.*, gtk.*:: |
217 | Subcommands that can be configured here are 'top', 'report' and 'annotate'. | |
218 | These values are booleans, for example: | |
219 | ||
220 | [tui] | |
221 | top = true | |
222 | ||
223 | will make the TUI be the default for the 'top' subcommand. Those will be | |
224 | available if the required libs were detected at tool build time. | |
225 | ||
2733525b TS |
226 | buildid.*:: |
227 | buildid.dir:: | |
228 | Each executable and shared library in modern distributions comes with a | |
229 | content based identifier that, if available, will be inserted in a | |
230 | 'perf.data' file header to, at analysis time find what is needed to do | |
231 | symbol resolution, code annotation, etc. | |
232 | ||
233 | The recording tools also stores a hard link or copy in a per-user | |
234 | directory, $HOME/.debug/, of binaries, shared libraries, /proc/kallsyms | |
235 | and /proc/kcore files to be used at analysis time. | |
236 | ||
237 | The buildid.dir variable can be used to either change this directory | |
238 | cache location, or to disable it altogether. If you want to disable it, | |
239 | set buildid.dir to /dev/null. The default is $HOME/.debug | |
240 | ||
3b97629d | 241 | annotate.*:: |
3b97629d TS |
242 | These are in control of addresses, jump function, source code |
243 | in lines of assembly code from a specific program. | |
244 | ||
245 | annotate.hide_src_code:: | |
246 | If a program which is analyzed has source code, | |
247 | this option lets 'annotate' print a list of assembly code with the source code. | |
248 | For example, let's see a part of a program. There're four lines. | |
249 | If this option is 'true', they can be printed | |
250 | without source code from a program as below. | |
251 | ||
252 | │ push %rbp | |
253 | │ mov %rsp,%rbp | |
254 | │ sub $0x10,%rsp | |
255 | │ mov (%rdi),%rdx | |
256 | ||
257 | But if this option is 'false', source code of the part | |
258 | can be also printed as below. Default is 'false'. | |
259 | ||
260 | │ struct rb_node *rb_next(const struct rb_node *node) | |
261 | │ { | |
262 | │ push %rbp | |
263 | │ mov %rsp,%rbp | |
264 | │ sub $0x10,%rsp | |
265 | │ struct rb_node *parent; | |
266 | │ | |
267 | │ if (RB_EMPTY_NODE(node)) | |
268 | │ mov (%rdi),%rdx | |
269 | │ return n; | |
270 | ||
cd0a9c51 RB |
271 | This option works with tui, stdio2 browsers. |
272 | ||
3b97629d TS |
273 | annotate.use_offset:: |
274 | Basing on a first address of a loaded function, offset can be used. | |
275 | Instead of using original addresses of assembly code, | |
276 | addresses subtracted from a base address can be printed. | |
277 | Let's illustrate an example. | |
278 | If a base address is 0XFFFFFFFF81624d50 as below, | |
279 | ||
280 | ffffffff81624d50 <load0> | |
281 | ||
282 | an address on assembly code has a specific absolute address as below | |
283 | ||
284 | ffffffff816250b8:│ mov 0x8(%r14),%rdi | |
285 | ||
286 | but if use_offset is 'true', an address subtracted from a base address is printed. | |
287 | Default is true. This option is only applied to TUI. | |
288 | ||
289 | 368:│ mov 0x8(%r14),%rdi | |
290 | ||
cd0a9c51 RB |
291 | This option works with tui, stdio2 browsers. |
292 | ||
3b97629d TS |
293 | annotate.jump_arrows:: |
294 | There can be jump instruction among assembly code. | |
295 | Depending on a boolean value of jump_arrows, | |
296 | arrows can be printed or not which represent | |
297 | where do the instruction jump into as below. | |
298 | ||
299 | │ ┌──jmp 1333 | |
300 | │ │ xchg %ax,%ax | |
301 | │1330:│ mov %r15,%r10 | |
302 | │1333:└─→cmp %r15,%r14 | |
303 | ||
304 | If jump_arrow is 'false', the arrows isn't printed as below. | |
305 | Default is 'false'. | |
306 | ||
307 | │ ↓ jmp 1333 | |
308 | │ xchg %ax,%ax | |
309 | │1330: mov %r15,%r10 | |
310 | │1333: cmp %r15,%r14 | |
311 | ||
cd0a9c51 RB |
312 | This option works with tui browser. |
313 | ||
3b97629d TS |
314 | annotate.show_linenr:: |
315 | When showing source code if this option is 'true', | |
316 | line numbers are printed as below. | |
317 | ||
318 | │1628 if (type & PERF_SAMPLE_IDENTIFIER) { | |
319 | │ ↓ jne 508 | |
320 | │1628 data->id = *array; | |
321 | │1629 array++; | |
322 | │1630 } | |
323 | ||
324 | However if this option is 'false', they aren't printed as below. | |
325 | Default is 'false'. | |
326 | ||
327 | │ if (type & PERF_SAMPLE_IDENTIFIER) { | |
328 | │ ↓ jne 508 | |
329 | │ data->id = *array; | |
330 | │ array++; | |
331 | │ } | |
332 | ||
cd0a9c51 RB |
333 | This option works with tui, stdio2 browsers. |
334 | ||
3b97629d TS |
335 | annotate.show_nr_jumps:: |
336 | Let's see a part of assembly code. | |
337 | ||
338 | │1382: movb $0x1,-0x270(%rbp) | |
339 | ||
340 | If use this, the number of branches jumping to that address can be printed as below. | |
341 | Default is 'false'. | |
342 | ||
343 | │1 1382: movb $0x1,-0x270(%rbp) | |
344 | ||
cd0a9c51 RB |
345 | This option works with tui, stdio2 browsers. |
346 | ||
3b97629d TS |
347 | annotate.show_total_period:: |
348 | To compare two records on an instruction base, with this option | |
349 | provided, display total number of samples that belong to a line | |
350 | in assembly code. If this option is 'true', total periods are printed | |
351 | instead of percent values as below. | |
352 | ||
353 | 302 │ mov %eax,%eax | |
354 | ||
355 | But if this option is 'false', percent values for overhead are printed i.e. | |
356 | Default is 'false'. | |
357 | ||
358 | 99.93 │ mov %eax,%eax | |
359 | ||
cd0a9c51 RB |
360 | This option works with tui, stdio2, stdio browsers. |
361 | ||
362 | annotate.show_nr_samples:: | |
363 | By default perf annotate shows percentage of samples. This option | |
364 | can be used to print absolute number of samples. Ex, when set as | |
365 | false: | |
366 | ||
367 | Percent│ | |
368 | 74.03 │ mov %fs:0x28,%rax | |
369 | ||
370 | When set as true: | |
371 | ||
372 | Samples│ | |
373 | 6 │ mov %fs:0x28,%rax | |
374 | ||
375 | This option works with tui, stdio2, stdio browsers. | |
376 | ||
43c40231 ACM |
377 | annotate.offset_level:: |
378 | Default is '1', meaning just jump targets will have offsets show right beside | |
379 | the instruction. When set to '2' 'call' instructions will also have its offsets | |
380 | shown, 3 or higher will show offsets for all instructions. | |
381 | ||
cd0a9c51 RB |
382 | This option works with tui, stdio2 browsers. |
383 | ||
485311d9 TS |
384 | hist.*:: |
385 | hist.percentage:: | |
386 | This option control the way to calculate overhead of filtered entries - | |
387 | that means the value of this option is effective only if there's a | |
388 | filter (by comm, dso or symbol name). Suppose a following example: | |
389 | ||
390 | Overhead Symbols | |
391 | ........ ....... | |
392 | 33.33% foo | |
393 | 33.33% bar | |
394 | 33.33% baz | |
395 | ||
396 | This is an original overhead and we'll filter out the first 'foo' | |
397 | entry. The value of 'relative' would increase the overhead of 'bar' | |
398 | and 'baz' to 50.00% for each, while 'absolute' would show their | |
399 | current overhead (33.33%). | |
400 | ||
67f43c00 TS |
401 | ui.*:: |
402 | ui.show-headers:: | |
403 | This option controls display of column headers (like 'Overhead' and 'Symbol') | |
404 | in 'report' and 'top'. If this option is false, they are hidden. | |
405 | This option is only applied to TUI. | |
406 | ||
56c94dc5 | 407 | call-graph.*:: |
eadcaa3d TJ |
408 | The following controls the handling of call-graphs (obtained via the |
409 | -g/--call-graph options). | |
56c94dc5 TS |
410 | |
411 | call-graph.record-mode:: | |
eadcaa3d TJ |
412 | The mode for user space can be 'fp' (frame pointer), 'dwarf' |
413 | and 'lbr'. The value 'dwarf' is effective only if libunwind | |
414 | (or a recent version of libdw) is present on the system; | |
415 | the value 'lbr' only works for certain cpus. The method for | |
416 | kernel space is controlled not by this option but by the | |
417 | kernel config (CONFIG_UNWINDER_*). | |
56c94dc5 TS |
418 | |
419 | call-graph.dump-size:: | |
420 | The size of stack to dump in order to do post-unwinding. Default is 8192 (byte). | |
421 | When using dwarf into record-mode, the default size will be used if omitted. | |
422 | ||
423 | call-graph.print-type:: | |
424 | The print-types can be graph (graph absolute), fractal (graph relative), | |
425 | flat and folded. This option controls a way to show overhead for each callchain | |
426 | entry. Suppose a following example. | |
427 | ||
428 | Overhead Symbols | |
429 | ........ ....... | |
430 | 40.00% foo | |
431 | | | |
432 | ---foo | |
433 | | | |
434 | |--50.00%--bar | |
435 | | main | |
436 | | | |
437 | --50.00%--baz | |
438 | main | |
439 | ||
440 | This output is a 'fractal' format. The 'foo' came from 'bar' and 'baz' exactly | |
441 | half and half so 'fractal' shows 50.00% for each | |
442 | (meaning that it assumes 100% total overhead of 'foo'). | |
443 | ||
444 | The 'graph' uses absolute overhead value of 'foo' as total so each of | |
445 | 'bar' and 'baz' callchain will have 20.00% of overhead. | |
446 | If 'flat' is used, single column and linear exposure of call chains. | |
447 | 'folded' mean call chains are displayed in a line, separated by semicolons. | |
448 | ||
449 | call-graph.order:: | |
450 | This option controls print order of callchains. The default is | |
451 | 'callee' which means callee is printed at top and then followed by its | |
452 | caller and so on. The 'caller' prints it in reverse order. | |
453 | ||
454 | If this option is not set and report.children or top.children is | |
455 | set to true (or the equivalent command line option is given), | |
456 | the default value of this option is changed to 'caller' for the | |
457 | execution of 'perf report' or 'perf top'. Other commands will | |
458 | still default to 'callee'. | |
459 | ||
460 | call-graph.sort-key:: | |
461 | The callchains are merged if they contain same information. | |
462 | The sort-key option determines a way to compare the callchains. | |
463 | A value of 'sort-key' can be 'function' or 'address'. | |
464 | The default is 'function'. | |
465 | ||
466 | call-graph.threshold:: | |
467 | When there're many callchains it'd print tons of lines. So perf omits | |
468 | small callchains under a certain overhead (threshold) and this option | |
469 | control the threshold. Default is 0.5 (%). The overhead is calculated | |
470 | by value depends on call-graph.print-type. | |
471 | ||
472 | call-graph.print-limit:: | |
473 | This is a maximum number of lines of callchain printed for a single | |
474 | histogram entry. Default is 0 which means no limitation. | |
475 | ||
806cb95b | 476 | report.*:: |
fa1f4565 ACM |
477 | report.sort_order:: |
478 | Allows changing the default sort order from "comm,dso,symbol" to | |
479 | some other default, for instance "sym,dso" may be more fitting for | |
480 | kernel developers. | |
806cb95b TS |
481 | report.percent-limit:: |
482 | This one is mostly the same as call-graph.threshold but works for | |
483 | histogram entries. Entries having an overhead lower than this | |
484 | percentage will not be printed. Default is '0'. If percent-limit | |
485 | is '10', only entries which have more than 10% of overhead will be | |
486 | printed. | |
487 | ||
488 | report.queue-size:: | |
489 | This option sets up the maximum allocation size of the internal | |
490 | event queue for ordering events. Default is 0, meaning no limit. | |
491 | ||
492 | report.children:: | |
493 | 'Children' means functions called from another function. | |
494 | If this option is true, 'perf report' cumulates callchains of children | |
495 | and show (accumulated) total overhead as well as 'Self' overhead. | |
496 | Please refer to the 'perf report' manual. The default is 'true'. | |
497 | ||
498 | report.group:: | |
499 | This option is to show event group information together. | |
500 | Example output with this turned on, notice that there is one column | |
501 | per event in the group, ref-cycles and cycles: | |
502 | ||
503 | # group: {ref-cycles,cycles} | |
504 | # ======== | |
505 | # | |
506 | # Samples: 7K of event 'anon group { ref-cycles, cycles }' | |
507 | # Event count (approx.): 6876107743 | |
508 | # | |
509 | # Overhead Command Shared Object Symbol | |
510 | # ................ ....... ................. ................... | |
511 | # | |
512 | 99.84% 99.76% noploop noploop [.] main | |
513 | 0.07% 0.00% noploop ld-2.15.so [.] strcmp | |
514 | 0.03% 0.00% noploop [kernel.kallsyms] [k] timerqueue_del | |
515 | ||
0b04c840 TS |
516 | top.*:: |
517 | top.children:: | |
518 | Same as 'report.children'. So if it is enabled, the output of 'top' | |
519 | command will have 'Children' overhead column as well as 'Self' overhead | |
520 | column by default. | |
521 | The default is 'true'. | |
522 | ||
b0aaf4c8 RB |
523 | top.call-graph:: |
524 | This is identical to 'call-graph.record-mode', except it is | |
525 | applicable only for 'top' subcommand. This option ONLY setup | |
526 | the unwind method. To enable 'perf top' to actually use it, | |
527 | the command line option -g must be specified. | |
528 | ||
08b75b40 TS |
529 | man.*:: |
530 | man.viewer:: | |
531 | This option can assign a tool to view manual pages when 'help' | |
532 | subcommand was invoked. Supported tools are 'man', 'woman' | |
533 | (with emacs client) and 'konqueror'. Default is 'man'. | |
534 | ||
535 | New man viewer tool can be also added using 'man.<tool>.cmd' | |
536 | or use different path using 'man.<tool>.path' config option. | |
537 | ||
ab2e08e8 TS |
538 | pager.*:: |
539 | pager.<subcommand>:: | |
540 | When the subcommand is run on stdio, determine whether it uses | |
541 | pager or not based on this value. Default is 'unspecified'. | |
542 | ||
57f0dafe TS |
543 | kmem.*:: |
544 | kmem.default:: | |
545 | This option decides which allocator is to be analyzed if neither | |
546 | '--slab' nor '--page' option is used. Default is 'slab'. | |
547 | ||
a9edec3c TS |
548 | record.*:: |
549 | record.build-id:: | |
550 | This option can be 'cache', 'no-cache' or 'skip'. | |
551 | 'cache' is to post-process data and save/update the binaries into | |
552 | the build-id cache (in ~/.debug). This is the default. | |
553 | But if this option is 'no-cache', it will not update the build-id cache. | |
554 | 'skip' skips post-processing and does not update the cache. | |
555 | ||
b0aaf4c8 RB |
556 | record.call-graph:: |
557 | This is identical to 'call-graph.record-mode', except it is | |
558 | applicable only for 'record' subcommand. This option ONLY setup | |
559 | the unwind method. To enable 'perf record' to actually use it, | |
560 | the command line option -g must be specified. | |
561 | ||
562 | record.aio:: | |
563 | Use 'n' control blocks in asynchronous (Posix AIO) trace writing | |
564 | mode ('n' default: 1, max: 4). | |
565 | ||
d49dd15d NK |
566 | diff.*:: |
567 | diff.order:: | |
568 | This option sets the number of columns to sort the result. | |
569 | The default is 0, which means sorting by baseline. | |
570 | Setting it to 1 will sort the result by delta (or other | |
571 | compute method selected). | |
572 | ||
4b35994a NK |
573 | diff.compute:: |
574 | This options sets the method for computing the diff result. | |
575 | Possible values are 'delta', 'delta-abs', 'ratio' and | |
576 | 'wdiff'. Default is 'delta'. | |
577 | ||
ac96287c ACM |
578 | trace.*:: |
579 | trace.add_events:: | |
580 | Allows adding a set of events to add to the ones specified | |
581 | by the user, or use as a default one if none was specified. | |
582 | The initial use case is to add augmented_raw_syscalls.o to | |
583 | activate the 'perf trace' logic that looks for syscall | |
584 | pointer contents after the normal tracepoint payload. | |
42e4a52d | 585 | |
9ed45d59 ACM |
586 | trace.args_alignment:: |
587 | Number of columns to align the argument list, default is 70, | |
588 | use 40 for the strace default, zero to no alignment. | |
589 | ||
d32de87e ACM |
590 | trace.no_inherit:: |
591 | Do not follow children threads. | |
592 | ||
9d6dc178 ACM |
593 | trace.show_arg_names:: |
594 | Should syscall argument names be printed? If not then trace.show_zeros | |
595 | will be set. | |
596 | ||
42e4a52d ACM |
597 | trace.show_duration:: |
598 | Show syscall duration. | |
599 | ||
c65c83ff ACM |
600 | trace.show_prefix:: |
601 | If set to 'yes' will show common string prefixes in tables. The default | |
602 | is to remove the common prefix in things like "MAP_SHARED", showing just "SHARED". | |
603 | ||
b036146f ACM |
604 | trace.show_timestamp:: |
605 | Show syscall start timestamp. | |
606 | ||
e7c634fc ACM |
607 | trace.show_zeros:: |
608 | Do not suppress syscall arguments that are equal to zero. | |
ac96287c | 609 | |
f11b2803 ACM |
610 | trace.tracepoint_beautifiers:: |
611 | Use "libtraceevent" to use that library to augment the tracepoint arguments, | |
612 | "libbeauty", the default, to use the same argument beautifiers used in the | |
613 | strace-like sys_enter+sys_exit lines. | |
614 | ||
b0aaf4c8 RB |
615 | ftrace.*:: |
616 | ftrace.tracer:: | |
617 | Can be used to select the default tracer. Possible values are | |
618 | 'function' and 'function_graph'. | |
619 | ||
55fa8b8c CD |
620 | llvm.*:: |
621 | llvm.clang-path:: | |
622 | Path to clang. If omit, search it from $PATH. | |
623 | ||
624 | llvm.clang-bpf-cmd-template:: | |
625 | Cmdline template. Below lines show its default value. Environment | |
626 | variable is used to pass options. | |
87407fa5 LY |
627 | "$CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS "\ |
628 | "-DLINUX_VERSION_CODE=$LINUX_VERSION_CODE " \ | |
629 | "$CLANG_OPTIONS $PERF_BPF_INC_OPTIONS $KERNEL_INC_OPTIONS " \ | |
630 | "-Wno-unused-value -Wno-pointer-sign " \ | |
631 | "-working-directory $WORKING_DIR " \ | |
632 | "-c \"$CLANG_SOURCE\" -target bpf $CLANG_EMIT_LLVM -O2 -o - $LLVM_OPTIONS_PIPE" | |
55fa8b8c CD |
633 | |
634 | llvm.clang-opt:: | |
635 | Options passed to clang. | |
636 | ||
637 | llvm.kbuild-dir:: | |
638 | kbuild directory. If not set, use /lib/modules/`uname -r`/build. | |
639 | If set to "" deliberately, skip kernel header auto-detector. | |
640 | ||
641 | llvm.kbuild-opts:: | |
642 | Options passed to 'make' when detecting kernel header options. | |
643 | ||
644 | llvm.dump-obj:: | |
645 | Enable perf dump BPF object files compiled by LLVM. | |
646 | ||
647 | llvm.opts:: | |
648 | Options passed to llc. | |
649 | ||
4968ac8f AK |
650 | samples.*:: |
651 | ||
652 | samples.context:: | |
653 | Define how many ns worth of time to show | |
654 | around samples in perf report sample context browser. | |
655 | ||
e3b74de5 AK |
656 | scripts.*:: |
657 | ||
658 | Any option defines a script that is added to the scripts menu | |
659 | in the interactive perf browser and whose output is displayed. | |
660 | The name of the option is the name, the value is a script command line. | |
661 | The script gets the same options passed as a full perf script, | |
662 | in particular -i perfdata file, --cpu, --tid | |
663 | ||
b0aaf4c8 RB |
664 | convert.*:: |
665 | ||
666 | convert.queue-size:: | |
667 | Limit the size of ordered_events queue, so we could control | |
668 | allocation size of perf data files without proper finished | |
669 | round events. | |
670 | ||
671 | intel-pt.*:: | |
672 | ||
673 | intel-pt.cache-divisor:: | |
674 | ||
675 | intel-pt.mispred-all:: | |
676 | If set, Intel PT decoder will set the mispred flag on all | |
677 | branches. | |
678 | ||
679 | auxtrace.*:: | |
680 | ||
681 | auxtrace.dumpdir:: | |
682 | s390 only. The directory to save the auxiliary trace buffer | |
683 | can be changed using this option. Ex, auxtrace.dumpdir=/tmp. | |
684 | If the directory does not exist or has the wrong file type, | |
685 | the current directory is used. | |
686 | ||
7d685243 TS |
687 | SEE ALSO |
688 | -------- | |
689 | linkperf:perf[1] |