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3b0b16bf8c
The objdump utility has useful --prefix / --prefix-strip options to
allow changing source code file names hardcoded into executables' debug
info. Add options to 'perf report', 'perf top' and 'perf annotate',
which are then passed to objdump.
$ mkdir foo
$ echo 'main() { for (;;); }' > foo/foo.c
$ gcc -g foo/foo.c
foo/foo.c:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
1 | main() { for (;;); }
| ^~~~
$ perf record ./a.out
^C[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.230 MB perf.data (5721 samples) ]
$ mv foo bar
$ perf annotate
<does not show source code>
$ perf annotate --prefix=/home/ak/lsrc/git/bar --prefix-strip=5
<does show source code>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Jiri Olsa <jolsa@redhat.com>
LPU-Reference: 20200107210444.214071-1-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
138 lines
3.5 KiB
Text
138 lines
3.5 KiB
Text
perf-annotate(1)
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================
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NAME
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----
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perf-annotate - Read perf.data (created by perf record) and display annotated code
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SYNOPSIS
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--------
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[verse]
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'perf annotate' [-i <file> | --input=file] [symbol_name]
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DESCRIPTION
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-----------
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This command reads the input file and displays an annotated version of the
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code. If the object file has debug symbols then the source code will be
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displayed alongside assembly code.
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If there is no debug info in the object, then annotated assembly is displayed.
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OPTIONS
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-------
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-i::
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--input=<file>::
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Input file name. (default: perf.data unless stdin is a fifo)
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-d::
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--dsos=<dso[,dso...]>::
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Only consider symbols in these dsos.
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-s::
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--symbol=<symbol>::
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Symbol to annotate.
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-f::
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--force::
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Don't do ownership validation.
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-v::
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--verbose::
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Be more verbose. (Show symbol address, etc)
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-q::
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--quiet::
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Do not show any message. (Suppress -v)
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-n::
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--show-nr-samples::
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Show the number of samples for each symbol
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-D::
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--dump-raw-trace::
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Dump raw trace in ASCII.
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-k::
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--vmlinux=<file>::
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vmlinux pathname.
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--ignore-vmlinux::
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Ignore vmlinux files.
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-m::
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--modules::
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Load module symbols. WARNING: use only with -k and LIVE kernel.
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-l::
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--print-line::
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Print matching source lines (may be slow).
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-P::
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--full-paths::
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Don't shorten the displayed pathnames.
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--stdio:: Use the stdio interface.
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--stdio2:: Use the stdio2 interface, non-interactive, uses the TUI formatting.
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--stdio-color=<mode>::
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'always', 'never' or 'auto', allowing configuring color output
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via the command line, in addition to via "color.ui" .perfconfig.
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Use '--stdio-color always' to generate color even when redirecting
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to a pipe or file. Using just '--stdio-color' is equivalent to
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using 'always'.
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--tui:: Use the TUI interface. Use of --tui requires a tty, if one is not
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present, as when piping to other commands, the stdio interface is
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used. This interfaces starts by centering on the line with more
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samples, TAB/UNTAB cycles through the lines with more samples.
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--gtk:: Use the GTK interface.
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-C::
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--cpu=<cpu>:: Only report samples for the list of CPUs provided. Multiple CPUs can
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be provided as a comma-separated list with no space: 0,1. Ranges of
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CPUs are specified with -: 0-2. Default is to report samples on all
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CPUs.
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--asm-raw::
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Show raw instruction encoding of assembly instructions.
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--show-total-period:: Show a column with the sum of periods.
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--source::
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Interleave source code with assembly code. Enabled by default,
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disable with --no-source.
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--symfs=<directory>::
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Look for files with symbols relative to this directory.
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-M::
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--disassembler-style=:: Set disassembler style for objdump.
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--objdump=<path>::
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Path to objdump binary.
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--prefix=PREFIX::
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--prefix-strip=N::
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Remove first N entries from source file path names in executables
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and add PREFIX. This allows to display source code compiled on systems
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with different file system layout.
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--skip-missing::
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Skip symbols that cannot be annotated.
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--group::
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Show event group information together
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--percent-type::
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Set annotation percent type from following choices:
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global-period, local-period, global-hits, local-hits
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The local/global keywords set if the percentage is computed
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in the scope of the function (local) or the whole data (global).
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The period/hits keywords set the base the percentage is computed
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on - the samples period or the number of samples (hits).
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SEE ALSO
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--------
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linkperf:perf-record[1], linkperf:perf-report[1]
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