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PERF-REPORT(1)				   perf Manual				   PERF-REPORT(1)

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

SYNOPSIS
       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:

	   o   comm: command (name) of the task which can be read via /proc/<pid>/comm

	   o   pid: command and tid of the task

	   o   dso: name of library or module executed at the time of sample

	   o   symbol: name of function executed at the time of sample

	   o   parent: name of function matched to the parent regex filter. Unmatched entries are
	       displayed as "[other]".

	   o   cpu: cpu number the task ran at the time of sample

	   o   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.

	   o   dso_from: name of library or module branched from

	   o   dso_to: name of library or module branched to

	   o   symbol_from: name of function branched from

	   o   symbol_to: name of function branched to

	   o   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:

	   o   flat: single column, linear exposure of call chains.

	   o   graph: use a graph tree, displaying absolute overhead rates.

	   o   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
       perf-stat(1), perf-annotate(1)

perf					    06/30/2014				   PERF-REPORT(1)
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