1perf-report(1)
2==============
3
4NAME
5----
6perf-report - Read perf.data (created by perf record) and display the profile
7
8SYNOPSIS
9--------
10[verse]
11'perf report' [-i <file> | --input=file]
12
13DESCRIPTION
14-----------
15This command displays the performance counter profile information recorded
16via perf record.
17
18OPTIONS
19-------
20-i::
21--input=::
22        Input file name. (default: perf.data unless stdin is a fifo)
23
24-v::
25--verbose::
26        Be more verbose. (show symbol address, etc)
27
28-d::
29--dsos=::
30	Only consider symbols in these dsos. CSV that understands
31	file://filename entries.
32-n::
33--show-nr-samples::
34	Show the number of samples for each symbol
35
36--showcpuutilization::
37        Show sample percentage for different cpu modes.
38
39-T::
40--threads::
41	Show per-thread event counters
42-c::
43--comms=::
44	Only consider symbols in these comms. CSV that understands
45	file://filename entries.
46-S::
47--symbols=::
48	Only consider these symbols. CSV that understands
49	file://filename entries.
50
51--symbol-filter=::
52	Only show symbols that match (partially) with this filter.
53
54-U::
55--hide-unresolved::
56        Only display entries resolved to a symbol.
57
58-s::
59--sort=::
60	Sort histogram entries by given key(s) - multiple keys can be specified
61	in CSV format.  Following sort keys are available:
62	pid, comm, dso, symbol, parent, cpu, srcline, weight, local_weight.
63
64	Each key has following meaning:
65
66	- comm: command (name) of the task which can be read via /proc/<pid>/comm
67	- pid: command and tid of the task
68	- dso: name of library or module executed at the time of sample
69	- symbol: name of function executed at the time of sample
70	- parent: name of function matched to the parent regex filter. Unmatched
71	entries are displayed as "[other]".
72	- cpu: cpu number the task ran at the time of sample
73	- srcline: filename and line number executed at the time of sample.  The
74	DWARF debuggin info must be provided.
75
76	By default, comm, dso and symbol keys are used.
77	(i.e. --sort comm,dso,symbol)
78
79	If --branch-stack option is used, following sort keys are also
80	available:
81	dso_from, dso_to, symbol_from, symbol_to, mispredict.
82
83	- dso_from: name of library or module branched from
84	- dso_to: name of library or module branched to
85	- symbol_from: name of function branched from
86	- symbol_to: name of function branched to
87	- mispredict: "N" for predicted branch, "Y" for mispredicted branch
88
89	And default sort keys are changed to comm, dso_from, symbol_from, dso_to
90	and symbol_to, see '--branch-stack'.
91
92-p::
93--parent=<regex>::
94        A regex filter to identify parent. The parent is a caller of this
95	function and searched through the callchain, thus it requires callchain
96	information recorded. The pattern is in the exteneded regex format and
97	defaults to "\^sys_|^do_page_fault", see '--sort parent'.
98
99-x::
100--exclude-other::
101        Only display entries with parent-match.
102
103-w::
104--column-widths=<width[,width...]>::
105	Force each column width to the provided list, for large terminal
106	readability.
107
108-t::
109--field-separator=::
110	Use a special separator character and don't pad with spaces, replacing
111	all occurrences of this separator in symbol names (and other output)
112	with a '.' character, that thus it's the only non valid separator.
113
114-D::
115--dump-raw-trace::
116        Dump raw trace in ASCII.
117
118-g [type,min[,limit],order]::
119--call-graph::
120        Display call chains using type, min percent threshold, optional print
121	limit and order.
122	type can be either:
123	- flat: single column, linear exposure of call chains.
124	- graph: use a graph tree, displaying absolute overhead rates.
125	- fractal: like graph, but displays relative rates. Each branch of
126		 the tree is considered as a new profiled object. +
127
128	order can be either:
129	- callee: callee based call graph.
130	- caller: inverted caller based call graph.
131
132	Default: fractal,0.5,callee.
133
134-G::
135--inverted::
136        alias for inverted caller based call graph.
137
138--pretty=<key>::
139        Pretty printing style.  key: normal, raw
140
141--stdio:: Use the stdio interface.
142
143--tui:: Use the TUI interface, that is integrated with annotate and allows
144        zooming into DSOs or threads, among other features. Use of --tui
145	requires a tty, if one is not present, as when piping to other
146	commands, the stdio interface is used.
147
148--gtk:: Use the GTK2 interface.
149
150-k::
151--vmlinux=<file>::
152        vmlinux pathname
153
154--kallsyms=<file>::
155        kallsyms pathname
156
157-m::
158--modules::
159        Load module symbols. WARNING: This should only be used with -k and
160        a LIVE kernel.
161
162-f::
163--force::
164        Don't complain, do it.
165
166--symfs=<directory>::
167        Look for files with symbols relative to this directory.
168
169-C::
170--cpu:: Only report samples for the list of CPUs provided. Multiple CPUs can
171	be provided as a comma-separated list with no space: 0,1. Ranges of
172	CPUs are specified with -: 0-2. Default is to report samples on all
173	CPUs.
174
175-M::
176--disassembler-style=:: Set disassembler style for objdump.
177
178--source::
179	Interleave source code with assembly code. Enabled by default,
180	disable with --no-source.
181
182--asm-raw::
183	Show raw instruction encoding of assembly instructions.
184
185--show-total-period:: Show a column with the sum of periods.
186
187-I::
188--show-info::
189	Display extended information about the perf.data file. This adds
190	information which may be very large and thus may clutter the display.
191	It currently includes: cpu and numa topology of the host system.
192
193-b::
194--branch-stack::
195	Use the addresses of sampled taken branches instead of the instruction
196	address to build the histograms. To generate meaningful output, the
197	perf.data file must have been obtained using perf record -b or
198	perf record --branch-filter xxx where xxx is a branch filter option.
199	perf report is able to auto-detect whether a perf.data file contains
200	branch stacks and it will automatically switch to the branch view mode,
201	unless --no-branch-stack is used.
202
203--objdump=<path>::
204        Path to objdump binary.
205
206--group::
207	Show event group information together.
208
209--demangle::
210	Demangle symbol names to human readable form. It's enabled by default,
211	disable with --no-demangle.
212
213--percent-limit::
214	Do not show entries which have an overhead under that percent.
215	(Default: 0).
216
217SEE ALSO
218--------
219linkperf:perf-stat[1], linkperf:perf-annotate[1]
220