'\" t
.\" Title: perf-config
.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1
.\" Date: 2018-05-29
.\" Manual: perf Manual
.\" Source: perf
.\" Language: English
.\"
.TH "PERF_4.17\-CONFIG" "1" "2018\-05\-29" "perf" "perf Manual"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
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.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
perf-config \- Get and set variables in a configuration file\&.
.SH "SYNOPSIS"
.sp
.nf
\fIperf config\fR [] [section\&.name[=value] \&...]
or
\fIperf config\fR [] \-l | \-\-list
.fi
.SH "DESCRIPTION"
.sp
You can manage variables in a configuration file with this command\&.
.SH "OPTIONS"
.PP
\-l, \-\-list
.RS 4
Show current config variables, name and value, for all sections\&.
.RE
.PP
\-\-user
.RS 4
For writing and reading options: write to user
\fI$HOME/\&.perfconfig\fR
file or read it\&.
.RE
.PP
\-\-system
.RS 4
For writing and reading options: write to system\-wide
\fI$(sysconfdir)/perfconfig\fR
or read it\&.
.RE
.SH "CONFIGURATION FILE"
.sp
The perf configuration file contains many variables to change various aspects of each of its tools, including output, disk usage, etc\&. The \fI$HOME/\&.perfconfig\fR file is used to store a per\-user configuration\&. The file \fI$(sysconfdir)/perfconfig\fR can be used to store a system\-wide default configuration\&.
.sp
When reading or writing, the values are read from the system and user configuration files by default, and options \fI\-\-system\fR and \fI\-\-user\fR can be used to tell the command to read from or write to only that location\&.
.SS "Syntax"
.sp
The file consist of sections\&. A section starts with its name surrounded by square brackets and continues till the next section begins\&. Each variable must be in a section, and have the form \fIname = value\fR, for example:
.sp
.if n \{\
.RS 4
.\}
.nf
[section]
name1 = value1
name2 = value2
.fi
.if n \{\
.RE
.\}
.sp
Section names are case sensitive and can contain any characters except newline (double quote " and backslash have to be escaped as \e" and \e\e, respectively)\&. Section headers can\(cqt span multiple lines\&.
.SS "Example"
.sp
Given a $HOME/\&.perfconfig like this:
.sp
# # This is the config file, and # a \fI#\fR and \fI;\fR character indicates a comment #
.sp
.if n \{\
.RS 4
.\}
.nf
[colors]
# Color variables
top = red, default
medium = green, default
normal = lightgray, default
selected = white, lightgray
jump_arrows = blue, default
addr = magenta, default
root = white, blue
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
[tui]
# Defaults if linked with libslang
report = on
annotate = on
top = on
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
[buildid]
# Default, disable using /dev/null
dir = ~/\&.debug
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
[annotate]
# Defaults
hide_src_code = false
use_offset = true
jump_arrows = true
show_nr_jumps = false
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
[help]
# Format can be man, info, web or html
format = man
autocorrect = 0
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
[ui]
show\-headers = true
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
[call\-graph]
# fp (framepointer), dwarf
record\-mode = fp
print\-type = graph
order = caller
sort\-key = function
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
[report]
# Defaults
sort\-order = comm,dso,symbol
percent\-limit = 0
queue\-size = 0
children = true
group = true
.fi
.if n \{\
.RE
.\}
.sp
You can hide source code of annotate feature setting the config to false with
.sp
.if n \{\
.RS 4
.\}
.nf
% perf config annotate\&.hide_src_code=true
.fi
.if n \{\
.RE
.\}
.sp
If you want to add or modify several config items, you can do like
.sp
.if n \{\
.RS 4
.\}
.nf
% perf config ui\&.show\-headers=false kmem\&.default=slab
.fi
.if n \{\
.RE
.\}
.sp
To modify the sort order of report functionality in user config file(i\&.e\&. ~/\&.perfconfig), do
.sp
.if n \{\
.RS 4
.\}
.nf
% perf config \-\-user report sort\-order=srcline
.fi
.if n \{\
.RE
.\}
.sp
To change colors of selected line to other foreground and background colors in system config file (i\&.e\&. $(sysconf)/perfconfig), do
.sp
.if n \{\
.RS 4
.\}
.nf
% perf config \-\-system colors\&.selected=yellow,green
.fi
.if n \{\
.RE
.\}
.sp
To query the record mode of call graph, do
.sp
.if n \{\
.RS 4
.\}
.nf
% perf config call\-graph\&.record\-mode
.fi
.if n \{\
.RE
.\}
.sp
If you want to know multiple config key/value pairs, you can do like
.sp
.if n \{\
.RS 4
.\}
.nf
% perf config report\&.queue\-size call\-graph\&.order report\&.children
.fi
.if n \{\
.RE
.\}
.sp
To query the config value of sort order of call graph in user config file (i\&.e\&. ~/\&.perfconfig), do
.sp
.if n \{\
.RS 4
.\}
.nf
% perf config \-\-user call\-graph\&.sort\-order
.fi
.if n \{\
.RE
.\}
.sp
To query the config value of buildid directory in system config file (i\&.e\&. $(sysconf)/perfconfig), do
.sp
.if n \{\
.RS 4
.\}
.nf
% perf config \-\-system buildid\&.dir
.fi
.if n \{\
.RE
.\}
.SS "Variables"
.PP
colors\&.*
.RS 4
The variables for customizing the colors used in the output for the
\fIreport\fR,
\fItop\fR
and
\fIannotate\fR
in the TUI\&. They should specify the foreground and background colors, separated by a comma, for example:
.sp
.if n \{\
.RS 4
.\}
.nf
medium = green, lightgray
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
If you want to use the color configured for you terminal, just leave it
as \*(Aqdefault\*(Aq, for example:
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
medium = default, lightgray
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
Available colors:
red, yellow, green, cyan, gray, black, blue,
white, default, magenta, lightgray
.fi
.if n \{\
.RE
.\}
.RE
.PP
colors\&.top
.RS 4
\fItop\fR
means a overhead percentage which is more than 5%\&. And values of this variable specify percentage colors\&. Basic key values are foreground\-color
\fIred\fR
and background\-color
\fIdefault\fR\&.
.RE
.PP
colors\&.medium
.RS 4
\fImedium\fR
means a overhead percentage which has more than 0\&.5%\&. Default values are
\fIgreen\fR
and
\fIdefault\fR\&.
.RE
.PP
colors\&.normal
.RS 4
\fInormal\fR
means the rest of overhead percentages except
\fItop\fR,
\fImedium\fR,
\fIselected\fR\&. Default values are
\fIlightgray\fR
and
\fIdefault\fR\&.
.RE
.PP
colors\&.selected
.RS 4
This selects the colors for the current entry in a list of entries from sub\-commands (top, report, annotate)\&. Default values are
\fIblack\fR
and
\fIlightgray\fR\&.
.RE
.PP
colors\&.jump_arrows
.RS 4
Colors for jump arrows on assembly code listings such as
\fIjns\fR,
\fIjmp\fR,
\fIjane\fR, etc\&. Default values are
\fIblue\fR,
\fIdefault\fR\&.
.RE
.PP
colors\&.addr
.RS 4
This selects colors for addresses from
\fIannotate\fR\&. Default values are
\fImagenta\fR,
\fIdefault\fR\&.
.RE
.PP
colors\&.root
.RS 4
Colors for headers in the output of a sub\-commands (top, report)\&. Default values are
\fIwhite\fR,
\fIblue\fR\&.
.RE
.PP
tui\&.\fB, gtk\&.\fR
.RS 4
Subcommands that can be configured here are
\fItop\fR,
\fIreport\fR
and
\fIannotate\fR\&. These values are booleans, for example:
.sp
.if n \{\
.RS 4
.\}
.nf
[tui]
top = true
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
will make the TUI be the default for the \*(Aqtop\*(Aq subcommand\&. Those will be
available if the required libs were detected at tool build time\&.
.fi
.if n \{\
.RE
.\}
.RE
.PP
buildid\&.*, buildid\&.dir
.RS 4
Each executable and shared library in modern distributions comes with a content based identifier that, if available, will be inserted in a
\fIperf\&.data\fR
file header to, at analysis time find what is needed to do symbol resolution, code annotation, etc\&.
.sp
.if n \{\
.RS 4
.\}
.nf
The recording tools also stores a hard link or copy in a per\-user
directory, $HOME/\&.debug/, of binaries, shared libraries, /proc/kallsyms
and /proc/kcore files to be used at analysis time\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
The buildid\&.dir variable can be used to either change this directory
cache location, or to disable it altogether\&. If you want to disable it,
set buildid\&.dir to /dev/null\&. The default is $HOME/\&.debug
.fi
.if n \{\
.RE
.\}
.RE
.PP
annotate\&.*
.RS 4
These options work only for TUI\&. These are in control of addresses, jump function, source code in lines of assembly code from a specific program\&.
.RE
.PP
annotate\&.hide_src_code
.RS 4
If a program which is analyzed has source code, this option lets
\fIannotate\fR
print a list of assembly code with the source code\&. For example, let\(cqs see a part of a program\&. There\(cqre four lines\&. If this option is
\fItrue\fR, they can be printed without source code from a program as below\&.
.sp
.if n \{\
.RS 4
.\}
.nf
│ push %rbp
│ mov %rsp,%rbp
│ sub $0x10,%rsp
│ mov (%rdi),%rdx
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
But if this option is \*(Aqfalse\*(Aq, source code of the part
can be also printed as below\&. Default is \*(Aqfalse\*(Aq\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
│ struct rb_node *rb_next(const struct rb_node *node)
│ {
│ push %rbp
│ mov %rsp,%rbp
│ sub $0x10,%rsp
│ struct rb_node *parent;
│
│ if (RB_EMPTY_NODE(node))
│ mov (%rdi),%rdx
│ return n;
.fi
.if n \{\
.RE
.\}
.RE
.PP
annotate\&.use_offset
.RS 4
Basing on a first address of a loaded function, offset can be used\&. Instead of using original addresses of assembly code, addresses subtracted from a base address can be printed\&. Let\(cqs illustrate an example\&. If a base address is 0XFFFFFFFF81624d50 as below,
.sp
.if n \{\
.RS 4
.\}
.nf
ffffffff81624d50
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
an address on assembly code has a specific absolute address as below
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
ffffffff816250b8:│ mov 0x8(%r14),%rdi
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
but if use_offset is \*(Aqtrue\*(Aq, an address subtracted from a base address is printed\&.
Default is true\&. This option is only applied to TUI\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
368:│ mov 0x8(%r14),%rdi
.fi
.if n \{\
.RE
.\}
.RE
.PP
annotate\&.jump_arrows
.RS 4
There can be jump instruction among assembly code\&. Depending on a boolean value of jump_arrows, arrows can be printed or not which represent where do the instruction jump into as below\&.
.sp
.if n \{\
.RS 4
.\}
.nf
│ ┌──jmp 1333
│ │ xchg %ax,%ax
│1330:│ mov %r15,%r10
│1333:└─\(->cmp %r15,%r14
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
If jump_arrow is \*(Aqfalse\*(Aq, the arrows isn\*(Aqt printed as below\&.
Default is \*(Aqfalse\*(Aq\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
│ \(da jmp 1333
│ xchg %ax,%ax
│1330: mov %r15,%r10
│1333: cmp %r15,%r14
.fi
.if n \{\
.RE
.\}
.RE
.PP
annotate\&.show_linenr
.RS 4
When showing source code if this option is
\fItrue\fR, line numbers are printed as below\&.
.sp
.if n \{\
.RS 4
.\}
.nf
│1628 if (type & PERF_SAMPLE_IDENTIFIER) {
│ \(da jne 508
│1628 data\->id = *array;
│1629 array++;
│1630 }
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
However if this option is \*(Aqfalse\*(Aq, they aren\*(Aqt printed as below\&.
Default is \*(Aqfalse\*(Aq\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
│ if (type & PERF_SAMPLE_IDENTIFIER) {
│ \(da jne 508
│ data\->id = *array;
│ array++;
│ }
.fi
.if n \{\
.RE
.\}
.RE
.PP
annotate\&.show_nr_jumps
.RS 4
Let\(cqs see a part of assembly code\&.
.sp
.if n \{\
.RS 4
.\}
.nf
│1382: movb $0x1,\-0x270(%rbp)
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
If use this, the number of branches jumping to that address can be printed as below\&.
Default is \*(Aqfalse\*(Aq\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
│1 1382: movb $0x1,\-0x270(%rbp)
.fi
.if n \{\
.RE
.\}
.RE
.PP
annotate\&.show_total_period
.RS 4
To compare two records on an instruction base, with this option provided, display total number of samples that belong to a line in assembly code\&. If this option is
\fItrue\fR, total periods are printed instead of percent values as below\&.
.sp
.if n \{\
.RS 4
.\}
.nf
302 │ mov %eax,%eax
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
But if this option is \*(Aqfalse\*(Aq, percent values for overhead are printed i\&.e\&.
Default is \*(Aqfalse\*(Aq\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
99\&.93 │ mov %eax,%eax
.fi
.if n \{\
.RE
.\}
.RE
.PP
annotate\&.offset_level
.RS 4
Default is
\fI1\fR, meaning just jump targets will have offsets show right beside the instruction\&. When set to
\fI2\fR
\fIcall\fR
instructions will also have its offsets shown, 3 or higher will show offsets for all instructions\&.
.RE
.PP
hist\&.*, hist\&.percentage
.RS 4
This option control the way to calculate overhead of filtered entries \- that means the value of this option is effective only if there\(cqs a filter (by comm, dso or symbol name)\&. Suppose a following example:
.sp
.if n \{\
.RS 4
.\}
.nf
Overhead Symbols
\&.\&.\&.\&.\&.\&.\&.\&. \&.\&.\&.\&.\&.\&.\&.
33\&.33% foo
33\&.33% bar
33\&.33% baz
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
This is an original overhead and we\*(Aqll filter out the first \*(Aqfoo\*(Aq
entry\&. The value of \*(Aqrelative\*(Aq would increase the overhead of \*(Aqbar\*(Aq
and \*(Aqbaz\*(Aq to 50\&.00% for each, while \*(Aqabsolute\*(Aq would show their
current overhead (33\&.33%)\&.
.fi
.if n \{\
.RE
.\}
.RE
.PP
ui\&.*, ui\&.show\-headers
.RS 4
This option controls display of column headers (like
\fIOverhead\fR
and
\fISymbol\fR) in
\fIreport\fR
and
\fItop\fR\&. If this option is false, they are hidden\&. This option is only applied to TUI\&.
.RE
.PP
call\-graph\&.*
.RS 4
When sub\-commands
\fItop\fR
and
\fIreport\fR
work with \-g/\(em\-children there\(cqre options in control of call\-graph\&.
.RE
.PP
call\-graph\&.record\-mode
.RS 4
The record\-mode can be
\fIfp\fR
(frame pointer),
\fIdwarf\fR
and
\fIlbr\fR\&. The value of
\fIdwarf\fR
is effective only if perf detect needed library (libunwind or a recent version of libdw)\&.
\fIlbr\fR
only work for cpus that support it\&.
.RE
.PP
call\-graph\&.dump\-size
.RS 4
The size of stack to dump in order to do post\-unwinding\&. Default is 8192 (byte)\&. When using dwarf into record\-mode, the default size will be used if omitted\&.
.RE
.PP
call\-graph\&.print\-type
.RS 4
The print\-types can be graph (graph absolute), fractal (graph relative), flat and folded\&. This option controls a way to show overhead for each callchain entry\&. Suppose a following example\&.
.sp
.if n \{\
.RS 4
.\}
.nf
Overhead Symbols
\&.\&.\&.\&.\&.\&.\&.\&. \&.\&.\&.\&.\&.\&.\&.
40\&.00% foo
|
\-\-\-foo
|
|\-\-50\&.00%\-\-bar
| main
|
\-\-50\&.00%\-\-baz
main
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
This output is a \*(Aqfractal\*(Aq format\&. The \*(Aqfoo\*(Aq came from \*(Aqbar\*(Aq and \*(Aqbaz\*(Aq exactly
half and half so \*(Aqfractal\*(Aq shows 50\&.00% for each
(meaning that it assumes 100% total overhead of \*(Aqfoo\*(Aq)\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
The \*(Aqgraph\*(Aq uses absolute overhead value of \*(Aqfoo\*(Aq as total so each of
\*(Aqbar\*(Aq and \*(Aqbaz\*(Aq callchain will have 20\&.00% of overhead\&.
If \*(Aqflat\*(Aq is used, single column and linear exposure of call chains\&.
\*(Aqfolded\*(Aq mean call chains are displayed in a line, separated by semicolons\&.
.fi
.if n \{\
.RE
.\}
.RE
.PP
call\-graph\&.order
.RS 4
This option controls print order of callchains\&. The default is
\fIcallee\fR
which means callee is printed at top and then followed by its caller and so on\&. The
\fIcaller\fR
prints it in reverse order\&.
.sp
.if n \{\
.RS 4
.\}
.nf
If this option is not set and report\&.children or top\&.children is
set to true (or the equivalent command line option is given),
the default value of this option is changed to \*(Aqcaller\*(Aq for the
execution of \*(Aqperf report\*(Aq or \*(Aqperf top\*(Aq\&. Other commands will
still default to \*(Aqcallee\*(Aq\&.
.fi
.if n \{\
.RE
.\}
.RE
.PP
call\-graph\&.sort\-key
.RS 4
The callchains are merged if they contain same information\&. The sort\-key option determines a way to compare the callchains\&. A value of
\fIsort\-key\fR
can be
\fIfunction\fR
or
\fIaddress\fR\&. The default is
\fIfunction\fR\&.
.RE
.PP
call\-graph\&.threshold
.RS 4
When there\(cqre many callchains it\(cqd print tons of lines\&. So perf omits small callchains under a certain overhead (threshold) and this option control the threshold\&. Default is 0\&.5 (%)\&. The overhead is calculated by value depends on call\-graph\&.print\-type\&.
.RE
.PP
call\-graph\&.print\-limit
.RS 4
This is a maximum number of lines of callchain printed for a single histogram entry\&. Default is 0 which means no limitation\&.
.RE
.PP
report\&.*, report\&.sort_order
.RS 4
Allows changing the default sort order from "comm,dso,symbol" to some other default, for instance "sym,dso" may be more fitting for kernel developers\&.
.RE
.PP
report\&.percent\-limit
.RS 4
This one is mostly the same as call\-graph\&.threshold but works for histogram entries\&. Entries having an overhead lower than this percentage will not be printed\&. Default is
\fI0\fR\&. If percent\-limit is
\fI10\fR, only entries which have more than 10% of overhead will be printed\&.
.RE
.PP
report\&.queue\-size
.RS 4
This option sets up the maximum allocation size of the internal event queue for ordering events\&. Default is 0, meaning no limit\&.
.RE
.PP
report\&.children
.RS 4
\fIChildren\fR
means functions called from another function\&. If this option is true,
\fIperf report\fR
cumulates callchains of children and show (accumulated) total overhead as well as
\fISelf\fR
overhead\&. Please refer to the
\fIperf report\fR
manual\&. The default is
\fItrue\fR\&.
.RE
.PP
report\&.group
.RS 4
This option is to show event group information together\&. Example output with this turned on, notice that there is one column per event in the group, ref\-cycles and cycles:
.sp
.if n \{\
.RS 4
.\}
.nf
# group: {ref\-cycles,cycles}
# ========
#
# Samples: 7K of event \*(Aqanon group { ref\-cycles, cycles }\*(Aq
# Event count (approx\&.): 6876107743
#
# Overhead Command Shared Object Symbol
# \&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&. \&.\&.\&.\&.\&.\&.\&. \&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&. \&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.
#
99\&.84% 99\&.76% noploop noploop [\&.] main
0\&.07% 0\&.00% noploop ld\-2\&.15\&.so [\&.] strcmp
0\&.03% 0\&.00% noploop [kernel\&.kallsyms] [k] timerqueue_del
.fi
.if n \{\
.RE
.\}
.RE
.PP
top\&.*, top\&.children
.RS 4
Same as
\fIreport\&.children\fR\&. So if it is enabled, the output of
\fItop\fR
command will have
\fIChildren\fR
overhead column as well as
\fISelf\fR
overhead column by default\&. The default is
\fItrue\fR\&.
.RE
.PP
man\&.*, man\&.viewer
.RS 4
This option can assign a tool to view manual pages when
\fIhelp\fR
subcommand was invoked\&. Supported tools are
\fIman\fR,
\fIwoman\fR
(with emacs client) and
\fIkonqueror\fR\&. Default is
\fIman\fR\&.
.sp
.if n \{\
.RS 4
.\}
.nf
New man viewer tool can be also added using \*(Aqman\&.\&.cmd\*(Aq
or use different path using \*(Aqman\&.\&.path\*(Aq config option\&.
.fi
.if n \{\
.RE
.\}
.RE
.PP
pager\&.*, pager\&.
.RS 4
When the subcommand is run on stdio, determine whether it uses pager or not based on this value\&. Default is
\fIunspecified\fR\&.
.RE
.PP
kmem\&.*, kmem\&.default
.RS 4
This option decides which allocator is to be analyzed if neither
\fI\-\-slab\fR
nor
\fI\-\-page\fR
option is used\&. Default is
\fIslab\fR\&.
.RE
.PP
record\&.*, record\&.build\-id
.RS 4
This option can be
\fIcache\fR,
\fIno\-cache\fR
or
\fIskip\fR\&.
\fIcache\fR
is to post\-process data and save/update the binaries into the build\-id cache (in ~/\&.debug)\&. This is the default\&. But if this option is
\fIno\-cache\fR, it will not update the build\-id cache\&.
\fIskip\fR
skips post\-processing and does not update the cache\&.
.RE
.PP
diff\&.*, diff\&.order
.RS 4
This option sets the number of columns to sort the result\&. The default is 0, which means sorting by baseline\&. Setting it to 1 will sort the result by delta (or other compute method selected)\&.
.RE
.PP
diff\&.compute
.RS 4
This options sets the method for computing the diff result\&. Possible values are
\fIdelta\fR,
\fIdelta\-abs\fR,
\fIratio\fR
and
\fIwdiff\fR\&. Default is
\fIdelta\fR\&.
.RE
.SH "SEE ALSO"
.sp
\fBperf\fR(1)