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0bec253c | 1 | perf-report(1) |
c1c2365a | 2 | ============== |
0bec253c IM |
3 | |
4 | NAME | |
5 | ---- | |
23ac9cbe | 6 | perf-report - Read perf.data (created by perf record) and display the profile |
0bec253c IM |
7 | |
8 | SYNOPSIS | |
9 | -------- | |
10 | [verse] | |
11 | 'perf report' [-i <file> | --input=file] | |
12 | ||
13 | DESCRIPTION | |
14 | ----------- | |
15 | This command displays the performance counter profile information recorded | |
b0a28589 | 16 | via perf record. |
0bec253c IM |
17 | |
18 | OPTIONS | |
19 | ------- | |
20 | -i:: | |
21 | --input=:: | |
efad1415 | 22 | Input file name. (default: perf.data unless stdin is a fifo) |
e04fffc3 SB |
23 | |
24 | -v:: | |
25 | --verbose:: | |
26 | Be more verbose. (show symbol address, etc) | |
27 | ||
ca2b900f ZT |
28 | -n:: |
29 | --show-nr-samples:: | |
e3d7e183 | 30 | Show the number of samples for each symbol |
e04fffc3 SB |
31 | |
32 | --showcpuutilization:: | |
33 | Show sample percentage for different cpu modes. | |
34 | ||
ca2b900f ZT |
35 | -T:: |
36 | --threads:: | |
1f91d5fd NK |
37 | Show per-thread event counters. The input data file should be recorded |
38 | with -s option. | |
c8e66720 | 39 | -c:: |
cc8b88b1 ACM |
40 | --comms=:: |
41 | Only consider symbols in these comms. CSV that understands | |
f2148330 NK |
42 | file://filename entries. This option will affect the percentage of |
43 | the overhead column. See --percentage for more info. | |
e03eaa40 DA |
44 | --pid=:: |
45 | Only show events for given process ID (comma separated list). | |
46 | ||
47 | --tid=:: | |
48 | Only show events for given thread ID (comma separated list). | |
f2148330 NK |
49 | -d:: |
50 | --dsos=:: | |
51 | Only consider symbols in these dsos. CSV that understands | |
52 | file://filename entries. This option will affect the percentage of | |
53 | the overhead column. See --percentage for more info. | |
7bec7a91 ACM |
54 | -S:: |
55 | --symbols=:: | |
56 | Only consider these symbols. CSV that understands | |
f2148330 NK |
57 | file://filename entries. This option will affect the percentage of |
58 | the overhead column. See --percentage for more info. | |
0bec253c | 59 | |
fde0eeab NK |
60 | --symbol-filter=:: |
61 | Only show symbols that match (partially) with this filter. | |
62 | ||
e04fffc3 SB |
63 | -U:: |
64 | --hide-unresolved:: | |
65 | Only display entries resolved to a symbol. | |
66 | ||
c351c281 ACM |
67 | -s:: |
68 | --sort=:: | |
9811360e NK |
69 | Sort histogram entries by given key(s) - multiple keys can be specified |
70 | in CSV format. Following sort keys are available: | |
05484298 | 71 | pid, comm, dso, symbol, parent, cpu, srcline, weight, local_weight. |
9811360e NK |
72 | |
73 | Each key has following meaning: | |
74 | ||
75 | - comm: command (name) of the task which can be read via /proc/<pid>/comm | |
76 | - pid: command and tid of the task | |
77 | - dso: name of library or module executed at the time of sample | |
78 | - symbol: name of function executed at the time of sample | |
79 | - parent: name of function matched to the parent regex filter. Unmatched | |
80 | entries are displayed as "[other]". | |
81 | - cpu: cpu number the task ran at the time of sample | |
82 | - srcline: filename and line number executed at the time of sample. The | |
f5d05bce | 83 | DWARF debugging info must be provided. |
475eeab9 AK |
84 | - weight: Event specific weight, e.g. memory latency or transaction |
85 | abort cost. This is the global weight. | |
86 | - local_weight: Local weight version of the weight above. | |
87 | - transaction: Transaction abort flags. | |
a2ce067e NK |
88 | - overhead: Overhead percentage of sample |
89 | - overhead_sys: Overhead percentage of sample running in system mode | |
90 | - overhead_us: Overhead percentage of sample running in user mode | |
91 | - overhead_guest_sys: Overhead percentage of sample running in system mode | |
92 | on guest machine | |
93 | - overhead_guest_us: Overhead percentage of sample running in user mode on | |
94 | guest machine | |
95 | - sample: Number of sample | |
96 | - period: Raw number of event count of sample | |
9811360e NK |
97 | |
98 | By default, comm, dso and symbol keys are used. | |
99 | (i.e. --sort comm,dso,symbol) | |
100 | ||
101 | If --branch-stack option is used, following sort keys are also | |
102 | available: | |
103 | dso_from, dso_to, symbol_from, symbol_to, mispredict. | |
104 | ||
105 | - dso_from: name of library or module branched from | |
106 | - dso_to: name of library or module branched to | |
107 | - symbol_from: name of function branched from | |
108 | - symbol_to: name of function branched to | |
109 | - mispredict: "N" for predicted branch, "Y" for mispredicted branch | |
f5d05bce AK |
110 | - in_tx: branch in TSX transaction |
111 | - abort: TSX transaction abort. | |
0e332f03 | 112 | - cycles: Cycles in basic block |
9811360e NK |
113 | |
114 | And default sort keys are changed to comm, dso_from, symbol_from, dso_to | |
115 | and symbol_to, see '--branch-stack'. | |
c351c281 | 116 | |
a7d945bc NK |
117 | -F:: |
118 | --fields=:: | |
119 | Specify output field - multiple keys can be specified in CSV format. | |
120 | Following fields are available: | |
793aaaab | 121 | overhead, overhead_sys, overhead_us, overhead_children, sample and period. |
a7d945bc NK |
122 | Also it can contain any sort key(s). |
123 | ||
124 | By default, every sort keys not specified in -F will be appended | |
125 | automatically. | |
126 | ||
75e906c9 DZ |
127 | If --mem-mode option is used, following sort keys are also available |
128 | (incompatible with --branch-stack): | |
9b32ba71 | 129 | symbol_daddr, dso_daddr, locked, tlb, mem, snoop, dcacheline. |
75e906c9 DZ |
130 | |
131 | - symbol_daddr: name of data symbol being executed on at the time of sample | |
132 | - dso_daddr: name of library or module containing the data being executed | |
133 | on at the time of sample | |
134 | - locked: whether the bus was locked at the time of sample | |
135 | - tlb: type of tlb access for the data at the time of sample | |
136 | - mem: type of memory access for the data at the time of sample | |
137 | - snoop: type of snoop (if any) for the data at the time of sample | |
9b32ba71 | 138 | - dcacheline: the cacheline the data address is on at the time of sample |
75e906c9 DZ |
139 | |
140 | And default sort keys are changed to local_weight, mem, sym, dso, | |
141 | symbol_daddr, dso_daddr, snoop, tlb, locked, see '--mem-mode'. | |
142 | ||
e04fffc3 SB |
143 | -p:: |
144 | --parent=<regex>:: | |
9811360e NK |
145 | A regex filter to identify parent. The parent is a caller of this |
146 | function and searched through the callchain, thus it requires callchain | |
147 | information recorded. The pattern is in the exteneded regex format and | |
148 | defaults to "\^sys_|^do_page_fault", see '--sort parent'. | |
e04fffc3 SB |
149 | |
150 | -x:: | |
151 | --exclude-other:: | |
152 | Only display entries with parent-match. | |
153 | ||
52d422de | 154 | -w:: |
e04fffc3 | 155 | --column-widths=<width[,width...]>:: |
52d422de | 156 | Force each column width to the provided list, for large terminal |
cf59002f | 157 | readability. 0 means no limit (default behavior). |
52d422de ACM |
158 | |
159 | -t:: | |
160 | --field-separator=:: | |
52d422de | 161 | Use a special separator character and don't pad with spaces, replacing |
e04fffc3 | 162 | all occurrences of this separator in symbol names (and other output) |
52d422de ACM |
163 | with a '.' character, that thus it's the only non valid separator. |
164 | ||
e04fffc3 SB |
165 | -D:: |
166 | --dump-raw-trace:: | |
167 | Dump raw trace in ASCII. | |
168 | ||
8b7bad58 | 169 | -g [type,min[,limit],order[,key][,branch]]:: |
ec7ba4ea | 170 | --call-graph:: |
6581f6e3 NK |
171 | Display call chains using type, min percent threshold, optional print |
172 | limit and order. | |
ec7ba4ea | 173 | type can be either: |
e04fffc3 | 174 | - flat: single column, linear exposure of call chains. |
ec7ba4ea FW |
175 | - graph: use a graph tree, displaying absolute overhead rates. |
176 | - fractal: like graph, but displays relative rates. Each branch of | |
177 | the tree is considered as a new profiled object. + | |
d797fdc5 SL |
178 | |
179 | order can be either: | |
180 | - callee: callee based call graph. | |
181 | - caller: inverted caller based call graph. | |
182 | ||
99571ab3 AK |
183 | key can be: |
184 | - function: compare on functions | |
185 | - address: compare on individual code addresses | |
186 | ||
8b7bad58 AK |
187 | branch can be: |
188 | - branch: include last branch information in callgraph | |
189 | when available. Usually more convenient to use --branch-history | |
190 | for this. | |
191 | ||
99571ab3 | 192 | Default: fractal,0.5,callee,function. |
d797fdc5 | 193 | |
793aaaab NK |
194 | --children:: |
195 | Accumulate callchain of children to parent entry so that then can | |
196 | show up in the output. The output will have a new "Children" column | |
197 | and will be sorted on the data. It requires callchains are recorded. | |
dd309207 | 198 | See the `overhead calculation' section for more details. |
793aaaab | 199 | |
91e95617 WL |
200 | --max-stack:: |
201 | Set the stack depth limit when parsing the callchain, anything | |
202 | beyond the specified depth will be ignored. This is a trade-off | |
203 | between information loss and faster processing especially for | |
204 | workloads that can have a very long callchain stack. | |
205 | ||
206 | Default: 127 | |
207 | ||
d797fdc5 SL |
208 | -G:: |
209 | --inverted:: | |
210 | alias for inverted caller based call graph. | |
ec7ba4ea | 211 | |
b21484f1 GP |
212 | --ignore-callees=<regex>:: |
213 | Ignore callees of the function(s) matching the given regex. | |
214 | This has the effect of collecting the callers of each such | |
215 | function into one place in the call-graph tree. | |
216 | ||
e04fffc3 SB |
217 | --pretty=<key>:: |
218 | Pretty printing style. key: normal, raw | |
219 | ||
8b9e74eb ACM |
220 | --stdio:: Use the stdio interface. |
221 | ||
222 | --tui:: Use the TUI interface, that is integrated with annotate and allows | |
223 | zooming into DSOs or threads, among other features. Use of --tui | |
224 | requires a tty, if one is not present, as when piping to other | |
225 | commands, the stdio interface is used. | |
226 | ||
c31a9457 PE |
227 | --gtk:: Use the GTK2 interface. |
228 | ||
e04fffc3 SB |
229 | -k:: |
230 | --vmlinux=<file>:: | |
231 | vmlinux pathname | |
232 | ||
b226a5a7 DA |
233 | --kallsyms=<file>:: |
234 | kallsyms pathname | |
235 | ||
e04fffc3 SB |
236 | -m:: |
237 | --modules:: | |
238 | Load module symbols. WARNING: This should only be used with -k and | |
239 | a LIVE kernel. | |
240 | ||
241 | -f:: | |
242 | --force:: | |
243 | Don't complain, do it. | |
244 | ||
ec5761ea DA |
245 | --symfs=<directory>:: |
246 | Look for files with symbols relative to this directory. | |
247 | ||
c8e66720 | 248 | -C:: |
5d67be97 AB |
249 | --cpu:: Only report samples for the list of CPUs provided. Multiple CPUs can |
250 | be provided as a comma-separated list with no space: 0,1. Ranges of | |
251 | CPUs are specified with -: 0-2. Default is to report samples on all | |
252 | CPUs. | |
253 | ||
f69b64f7 AK |
254 | -M:: |
255 | --disassembler-style=:: Set disassembler style for objdump. | |
256 | ||
64c6f0c7 ACM |
257 | --source:: |
258 | Interleave source code with assembly code. Enabled by default, | |
259 | disable with --no-source. | |
260 | ||
261 | --asm-raw:: | |
262 | Show raw instruction encoding of assembly instructions. | |
263 | ||
3f2728bd ACM |
264 | --show-total-period:: Show a column with the sum of periods. |
265 | ||
fbe96f29 SE |
266 | -I:: |
267 | --show-info:: | |
268 | Display extended information about the perf.data file. This adds | |
269 | information which may be very large and thus may clutter the display. | |
270 | It currently includes: cpu and numa topology of the host system. | |
271 | ||
b50311dc RAV |
272 | -b:: |
273 | --branch-stack:: | |
274 | Use the addresses of sampled taken branches instead of the instruction | |
275 | address to build the histograms. To generate meaningful output, the | |
993ac88d SE |
276 | perf.data file must have been obtained using perf record -b or |
277 | perf record --branch-filter xxx where xxx is a branch filter option. | |
278 | perf report is able to auto-detect whether a perf.data file contains | |
279 | branch stacks and it will automatically switch to the branch view mode, | |
280 | unless --no-branch-stack is used. | |
b50311dc | 281 | |
fa94c36c AK |
282 | --branch-history:: |
283 | Add the addresses of sampled taken branches to the callstack. | |
284 | This allows to examine the path the program took to each sample. | |
285 | The data collection must have used -b (or -j) and -g. | |
286 | ||
7a4ec938 MB |
287 | --objdump=<path>:: |
288 | Path to objdump binary. | |
289 | ||
01d14f16 NK |
290 | --group:: |
291 | Show event group information together. | |
292 | ||
328ccdac NK |
293 | --demangle:: |
294 | Demangle symbol names to human readable form. It's enabled by default, | |
295 | disable with --no-demangle. | |
296 | ||
763122ad AK |
297 | --demangle-kernel:: |
298 | Demangle kernel symbol names to human readable form (for C++ kernels). | |
299 | ||
75e906c9 DZ |
300 | --mem-mode:: |
301 | Use the data addresses of samples in addition to instruction addresses | |
302 | to build the histograms. To generate meaningful output, the perf.data | |
303 | file must have been obtained using perf record -d -W and using a | |
304 | special event -e cpu/mem-loads/ or -e cpu/mem-stores/. See | |
305 | 'perf mem' for simpler access. | |
306 | ||
064f1981 NK |
307 | --percent-limit:: |
308 | Do not show entries which have an overhead under that percent. | |
309 | (Default: 0). | |
310 | ||
f2148330 NK |
311 | --percentage:: |
312 | Determine how to display the overhead percentage of filtered entries. | |
313 | Filters can be applied by --comms, --dsos and/or --symbols options and | |
314 | Zoom operations on the TUI (thread, dso, etc). | |
315 | ||
316 | "relative" means it's relative to filtered entries only so that the | |
317 | sum of shown entries will be always 100%. "absolute" means it retains | |
318 | the original value before and after the filter is applied. | |
319 | ||
5cfe2c82 JO |
320 | --header:: |
321 | Show header information in the perf.data file. This includes | |
322 | various information like hostname, OS and perf version, cpu/mem | |
323 | info, perf command line, event list and so on. Currently only | |
324 | --stdio output supports this feature. | |
325 | ||
326 | --header-only:: | |
327 | Show only perf.data header (forces --stdio). | |
328 | ||
520a2ebc AH |
329 | --itrace:: |
330 | Options for decoding instruction tracing data. The options are: | |
331 | ||
332 | i synthesize instructions events | |
333 | b synthesize branches events | |
334 | c synthesize branches events (calls only) | |
335 | r synthesize branches events (returns only) | |
53c76b0e | 336 | x synthesize transactions events |
520a2ebc AH |
337 | e synthesize error events |
338 | d create a debug log | |
53c76b0e | 339 | g synthesize a call chain (use with i or x) |
520a2ebc | 340 | |
53c76b0e | 341 | The default is all events i.e. the same as --itrace=ibxe |
520a2ebc AH |
342 | |
343 | In addition, the period (default 100000) for instructions events | |
344 | can be specified in units of: | |
345 | ||
346 | i instructions | |
347 | t ticks | |
348 | ms milliseconds | |
349 | us microseconds | |
350 | ns nanoseconds (default) | |
351 | ||
53c76b0e AH |
352 | Also the call chain size (default 16, max. 1024) for instructions or |
353 | transactions events can be specified. | |
520a2ebc AH |
354 | |
355 | To disable decoding entirely, use --no-itrace. | |
356 | ||
a9710ba0 AK |
357 | --full-source-path:: |
358 | Show the full path for source files for srcline output. | |
64a7e61f AH |
359 | |
360 | include::callchain-overhead-calculation.txt[] | |
361 | ||
0bec253c IM |
362 | SEE ALSO |
363 | -------- | |
64c6f0c7 | 364 | linkperf:perf-stat[1], linkperf:perf-annotate[1] |