1. 根目录:
2. tools
3. perf
4. Documentation
5. perf-report.txt

perf-report(1)
==============

NAME
----
perf-report - Read perf.data (created by perf record) and display the profile

SYNOPSIS
--------
[verse]
'perf report' [-i <file> | --input=file]

DESCRIPTION
-----------
This command displays the performance counter profile information recorded
via perf record.

OPTIONS
-------
-i::
--input=::
        Input file name. (default: perf.data)

-v::
--verbose::
        Be more verbose. (show symbol address, etc)

-d::
--dsos=::
	Only consider symbols in these dsos. CSV that understands
	file://filename entries.
-n::
--show-nr-samples::
	Show the number of samples for each symbol

--showcpuutilization::
        Show sample percentage for different cpu modes.

-T::
--threads::
	Show per-thread event counters
-C::
--comms=::
	Only consider symbols in these comms. CSV that understands
	file://filename entries.
-S::
--symbols=::
	Only consider these symbols. CSV that understands
	file://filename entries.

-U::
--hide-unresolved::
        Only display entries resolved to a symbol.

-s::
--sort=::
	Sort by key(s): pid, comm, dso, symbol, parent.

-p::
--parent=<regex>::
        regex filter to identify parent, see: '--sort parent'

-x::
--exclude-other::
        Only display entries with parent-match.

-w::
--column-widths=<width[,width...]>::
	Force each column width to the provided list, for large terminal
	readability.

-t::
--field-separator=::

	Use a special separator character and don't pad with spaces, replacing
	all occurrences of this separator in symbol names (and other output)
	with a '.' character, that thus it's the only non valid separator.

-D::
--dump-raw-trace::
        Dump raw trace in ASCII.

-g [type,min]::
--call-graph::
        Display call chains using type and min percent threshold.
	type can be either:
	- flat: single column, linear exposure of call chains.
	- graph: use a graph tree, displaying absolute overhead rates.
	- fractal: like graph, but displays relative rates. Each branch of
		 the tree is considered as a new profiled object. +
	Default: fractal,0.5.

--pretty=<key>::
        Pretty printing style.  key: normal, raw

--stdio:: Use the stdio interface.

--tui:: Use the TUI interface, that is integrated with annotate and allows
        zooming into DSOs or threads, among other features. Use of --tui
	requires a tty, if one is not present, as when piping to other
	commands, the stdio interface is used.

-k::
--vmlinux=<file>::
        vmlinux pathname

--kallsyms=<file>::
        kallsyms pathname

-m::
--modules::
        Load module symbols. WARNING: This should only be used with -k and
        a LIVE kernel.

-f::
--force::
        Don't complain, do it.

--symfs=<directory>::
        Look for files with symbols relative to this directory.

SEE ALSO
--------
linkperf:perf-stat[1]