229 lines
6.4 KiB
Plaintext
229 lines
6.4 KiB
Plaintext
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 unless stdin is a fifo)
|
|
|
|
-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.
|
|
|
|
--symbol-filter=::
|
|
Only show symbols that match (partially) with this filter.
|
|
|
|
-U::
|
|
--hide-unresolved::
|
|
Only display entries resolved to a symbol.
|
|
|
|
-s::
|
|
--sort=::
|
|
Sort histogram entries by given key(s) - multiple keys can be specified
|
|
in CSV format. Following sort keys are available:
|
|
pid, comm, dso, symbol, parent, cpu, srcline, weight, local_weight.
|
|
|
|
Each key has following meaning:
|
|
|
|
- comm: command (name) of the task which can be read via /proc/<pid>/comm
|
|
- pid: command and tid of the task
|
|
- dso: name of library or module executed at the time of sample
|
|
- symbol: name of function executed at the time of sample
|
|
- parent: name of function matched to the parent regex filter. Unmatched
|
|
entries are displayed as "[other]".
|
|
- cpu: cpu number the task ran at the time of sample
|
|
- srcline: filename and line number executed at the time of sample. The
|
|
DWARF debuggin info must be provided.
|
|
|
|
By default, comm, dso and symbol keys are used.
|
|
(i.e. --sort comm,dso,symbol)
|
|
|
|
If --branch-stack option is used, following sort keys are also
|
|
available:
|
|
dso_from, dso_to, symbol_from, symbol_to, mispredict.
|
|
|
|
- dso_from: name of library or module branched from
|
|
- dso_to: name of library or module branched to
|
|
- symbol_from: name of function branched from
|
|
- symbol_to: name of function branched to
|
|
- mispredict: "N" for predicted branch, "Y" for mispredicted branch
|
|
|
|
And default sort keys are changed to comm, dso_from, symbol_from, dso_to
|
|
and symbol_to, see '--branch-stack'.
|
|
|
|
-p::
|
|
--parent=<regex>::
|
|
A regex filter to identify parent. The parent is a caller of this
|
|
function and searched through the callchain, thus it requires callchain
|
|
information recorded. The pattern is in the exteneded regex format and
|
|
defaults to "\^sys_|^do_page_fault", 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[,limit],order[,key]]::
|
|
--call-graph::
|
|
Display call chains using type, min percent threshold, optional print
|
|
limit and order.
|
|
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. +
|
|
|
|
order can be either:
|
|
- callee: callee based call graph.
|
|
- caller: inverted caller based call graph.
|
|
|
|
key can be:
|
|
- function: compare on functions
|
|
- address: compare on individual code addresses
|
|
|
|
Default: fractal,0.5,callee,function.
|
|
|
|
-G::
|
|
--inverted::
|
|
alias for inverted caller based call graph.
|
|
|
|
--ignore-callees=<regex>::
|
|
Ignore callees of the function(s) matching the given regex.
|
|
This has the effect of collecting the callers of each such
|
|
function into one place in the call-graph tree.
|
|
|
|
--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.
|
|
|
|
--gtk:: Use the GTK2 interface.
|
|
|
|
-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.
|
|
|
|
-C::
|
|
--cpu:: Only report samples for the list of CPUs provided. Multiple CPUs can
|
|
be provided as a comma-separated list with no space: 0,1. Ranges of
|
|
CPUs are specified with -: 0-2. Default is to report samples on all
|
|
CPUs.
|
|
|
|
-M::
|
|
--disassembler-style=:: Set disassembler style for objdump.
|
|
|
|
--source::
|
|
Interleave source code with assembly code. Enabled by default,
|
|
disable with --no-source.
|
|
|
|
--asm-raw::
|
|
Show raw instruction encoding of assembly instructions.
|
|
|
|
--show-total-period:: Show a column with the sum of periods.
|
|
|
|
-I::
|
|
--show-info::
|
|
Display extended information about the perf.data file. This adds
|
|
information which may be very large and thus may clutter the display.
|
|
It currently includes: cpu and numa topology of the host system.
|
|
|
|
-b::
|
|
--branch-stack::
|
|
Use the addresses of sampled taken branches instead of the instruction
|
|
address to build the histograms. To generate meaningful output, the
|
|
perf.data file must have been obtained using perf record -b or
|
|
perf record --branch-filter xxx where xxx is a branch filter option.
|
|
perf report is able to auto-detect whether a perf.data file contains
|
|
branch stacks and it will automatically switch to the branch view mode,
|
|
unless --no-branch-stack is used.
|
|
|
|
--objdump=<path>::
|
|
Path to objdump binary.
|
|
|
|
--group::
|
|
Show event group information together.
|
|
|
|
--demangle::
|
|
Demangle symbol names to human readable form. It's enabled by default,
|
|
disable with --no-demangle.
|
|
|
|
--percent-limit::
|
|
Do not show entries which have an overhead under that percent.
|
|
(Default: 0).
|
|
|
|
SEE ALSO
|
|
--------
|
|
linkperf:perf-stat[1], linkperf:perf-annotate[1]
|