third_party/llvm-7.0/llvm/docs/CommandGuide/llvm-profdata.rst - SwiftShader - Git at Google

 llvm-profdata - Profile data tool
 =================================

 SYNOPSIS
 --------

 :program:`llvm-profdata` *command* [*args...*]

 DESCRIPTION
 -----------

 The :program:`llvm-profdata` tool is a small utility for working with profile
 data files.

 COMMANDS
 --------

 * :ref:`merge <profdata-merge>`
 * :ref:`show <profdata-show>`

 .. program:: llvm-profdata merge

 .. _profdata-merge:

 MERGE
 -----

 SYNOPSIS
 ^^^^^^^^

 :program:`llvm-profdata merge` [*options*] [*filename...*]

 DESCRIPTION
 ^^^^^^^^^^^

 :program:`llvm-profdata merge` takes several profile data files
 generated by PGO instrumentation and merges them together into a single
 indexed profile data file.

 By default profile data is merged without modification. This means that the
 relative importance of each input file is proportional to the number of samples
 or counts it contains. In general, the input from a longer training run will be
 interpreted as relatively more important than a shorter run. Depending on the
 nature of the training runs it may be useful to adjust the weight given to each
 input file by using the ``-weighted-input`` option.

 Profiles passed in via ``-weighted-input``, ``-input-files``, or via positional
 arguments are processed once for each time they are seen.


 OPTIONS
 ^^^^^^^

 .. option:: -help

  Print a summary of command line options.

 .. option:: -output=output, -o=output

  Specify the output file name.  *Output* cannot be ``-`` as the resulting
  indexed profile data can't be written to standard output.

 .. option:: -weighted-input=weight,filename

  Specify an input file name along with a weight. The profile counts of the
  supplied ``filename`` will be scaled (multiplied) by the supplied
  ``weight``, where where ``weight`` is a decimal integer >= 1.
  Input files specified without using this option are assigned a default
  weight of 1. Examples are shown below.

 .. option:: -input-files=path, -f=path

   Specify a file which contains a list of files to merge. The entries in this
   file are newline-separated. Lines starting with '#' are skipped. Entries may
   be of the form <filename> or <weight>,<filename>.

 .. option:: -instr (default)

  Specify that the input profile is an instrumentation-based profile.

 .. option:: -sample

  Specify that the input profile is a sample-based profile.

  The format of the generated file can be generated in one of three ways:

  .. option:: -binary (default)

  Emit the profile using a binary encoding. For instrumentation-based profile
  the output format is the indexed binary format.

  .. option:: -text

  Emit the profile in text mode. This option can also be used with both
  sample-based and instrumentation-based profile. When this option is used
  the profile will be dumped in the text format that is parsable by the profile
  reader.

  .. option:: -gcc

  Emit the profile using GCC's gcov format (Not yet supported).

 .. option:: -sparse[=true|false]

  Do not emit function records with 0 execution count. Can only be used in
  conjunction with -instr. Defaults to false, since it can inhibit compiler
  optimization during PGO.

 .. option:: -num-threads=N, -j=N

  Use N threads to perform profile merging. When N=0, llvm-profdata auto-detects
  an appropriate number of threads to use. This is the default.

 EXAMPLES
 ^^^^^^^^
 Basic Usage
 +++++++++++
 Merge three profiles:

 ::

     llvm-profdata merge foo.profdata bar.profdata baz.profdata -output merged.profdata

 Weighted Input
 ++++++++++++++
 The input file `foo.profdata` is especially important, multiply its counts by 10:

 ::

     llvm-profdata merge -weighted-input=10,foo.profdata bar.profdata baz.profdata -output merged.profdata

 Exactly equivalent to the previous invocation (explicit form; useful for programmatic invocation):

 ::

     llvm-profdata merge -weighted-input=10,foo.profdata -weighted-input=1,bar.profdata -weighted-input=1,baz.profdata -output merged.profdata

 .. program:: llvm-profdata show

 .. _profdata-show:

 SHOW
 ----

 SYNOPSIS
 ^^^^^^^^

 :program:`llvm-profdata show` [*options*] [*filename*]

 DESCRIPTION
 ^^^^^^^^^^^

 :program:`llvm-profdata show` takes a profile data file and displays the
 information about the profile counters for this file and
 for any of the specified function(s).

 If *filename* is omitted or is ``-``, then **llvm-profdata show** reads its
 input from standard input.

 OPTIONS
 ^^^^^^^

 .. option:: -all-functions

  Print details for every function.

 .. option:: -counts

  Print the counter values for the displayed functions.

 .. option:: -function=string

  Print details for a function if the function's name contains the given string.

 .. option:: -help

  Print a summary of command line options.

 .. option:: -output=output, -o=output

  Specify the output file name.  If *output* is ``-`` or it isn't specified,
  then the output is sent to standard output.

 .. option:: -instr (default)

  Specify that the input profile is an instrumentation-based profile.

 .. option:: -text

  Instruct the profile dumper to show profile counts in the text format of the
  instrumentation-based profile data representation. By default, the profile
  information is dumped in a more human readable form (also in text) with
  annotations.

 .. option:: -topn=n

  Instruct the profile dumper to show the top ``n`` functions with the
  hottest basic blocks in the summary section. By default, the topn functions
  are not dumped.

 .. option:: -sample

  Specify that the input profile is a sample-based profile.

 .. option:: -memop-sizes

  Show the profiled sizes of the memory intrinsic calls for shown functions.

 EXIT STATUS
 -----------

 :program:`llvm-profdata` returns 1 if the command is omitted or is invalid,
 if it cannot read input files, or if there is a mismatch between their data.
	llvm-profdata - Profile data tool
	=================================

	SYNOPSIS
	--------

	:program:`llvm-profdata` command [args...]

	DESCRIPTION
	-----------

	The :program:`llvm-profdata` tool is a small utility for working with profile
	data files.

	COMMANDS
	--------

	* :ref:`merge <profdata-merge>`
	* :ref:`show <profdata-show>`

	.. program:: llvm-profdata merge

	.. _profdata-merge:

	MERGE
	-----

	SYNOPSIS
	^^^^^^^^

	:program:`llvm-profdata merge` [options] [filename...]

	DESCRIPTION
	^^^^^^^^^^^

	:program:`llvm-profdata merge` takes several profile data files
	generated by PGO instrumentation and merges them together into a single
	indexed profile data file.

	By default profile data is merged without modification. This means that the
	relative importance of each input file is proportional to the number of samples
	or counts it contains. In general, the input from a longer training run will be
	interpreted as relatively more important than a shorter run. Depending on the
	nature of the training runs it may be useful to adjust the weight given to each
	input file by using the ``-weighted-input`` option.

	Profiles passed in via ``-weighted-input``, ``-input-files``, or via positional
	arguments are processed once for each time they are seen.


	OPTIONS
	^^^^^^^

	.. option:: -help

	Print a summary of command line options.

	.. option:: -output=output, -o=output

	Specify the output file name. Output cannot be ``-`` as the resulting
	indexed profile data can't be written to standard output.

	.. option:: -weighted-input=weight,filename

	Specify an input file name along with a weight. The profile counts of the
	supplied ``filename`` will be scaled (multiplied) by the supplied
	``weight``, where where ``weight`` is a decimal integer >= 1.
	Input files specified without using this option are assigned a default
	weight of 1. Examples are shown below.

	.. option:: -input-files=path, -f=path

	Specify a file which contains a list of files to merge. The entries in this
	file are newline-separated. Lines starting with '#' are skipped. Entries may
	be of the form <filename> or <weight>,<filename>.

	.. option:: -instr (default)

	Specify that the input profile is an instrumentation-based profile.

	.. option:: -sample

	Specify that the input profile is a sample-based profile.

	The format of the generated file can be generated in one of three ways:

	.. option:: -binary (default)

	Emit the profile using a binary encoding. For instrumentation-based profile
	the output format is the indexed binary format.

	.. option:: -text

	Emit the profile in text mode. This option can also be used with both
	sample-based and instrumentation-based profile. When this option is used
	the profile will be dumped in the text format that is parsable by the profile
	reader.

	.. option:: -gcc

	Emit the profile using GCC's gcov format (Not yet supported).

	.. option:: -sparse[=true\|false]

	Do not emit function records with 0 execution count. Can only be used in
	conjunction with -instr. Defaults to false, since it can inhibit compiler
	optimization during PGO.

	.. option:: -num-threads=N, -j=N

	Use N threads to perform profile merging. When N=0, llvm-profdata auto-detects
	an appropriate number of threads to use. This is the default.

	EXAMPLES
	^^^^^^^^
	Basic Usage
	+++++++++++
	Merge three profiles:

	::

	llvm-profdata merge foo.profdata bar.profdata baz.profdata -output merged.profdata

	Weighted Input
	++++++++++++++
	The input file `foo.profdata` is especially important, multiply its counts by 10:

	::

	llvm-profdata merge -weighted-input=10,foo.profdata bar.profdata baz.profdata -output merged.profdata

	Exactly equivalent to the previous invocation (explicit form; useful for programmatic invocation):

	::

	llvm-profdata merge -weighted-input=10,foo.profdata -weighted-input=1,bar.profdata -weighted-input=1,baz.profdata -output merged.profdata

	.. program:: llvm-profdata show

	.. _profdata-show:

	SHOW
	----

	SYNOPSIS
	^^^^^^^^

	:program:`llvm-profdata show` [options] [filename]

	DESCRIPTION
	^^^^^^^^^^^

	:program:`llvm-profdata show` takes a profile data file and displays the
	information about the profile counters for this file and
	for any of the specified function(s).

	If filename is omitted or is ``-``, then llvm-profdata show reads its
	input from standard input.

	OPTIONS
	^^^^^^^

	.. option:: -all-functions

	Print details for every function.

	.. option:: -counts

	Print the counter values for the displayed functions.

	.. option:: -function=string

	Print details for a function if the function's name contains the given string.

	.. option:: -help

	Print a summary of command line options.

	.. option:: -output=output, -o=output

	Specify the output file name. If output is ``-`` or it isn't specified,
	then the output is sent to standard output.

	.. option:: -instr (default)

	Specify that the input profile is an instrumentation-based profile.

	.. option:: -text

	Instruct the profile dumper to show profile counts in the text format of the
	instrumentation-based profile data representation. By default, the profile
	information is dumped in a more human readable form (also in text) with
	annotations.

	.. option:: -topn=n

	Instruct the profile dumper to show the top ``n`` functions with the
	hottest basic blocks in the summary section. By default, the topn functions
	are not dumped.

	.. option:: -sample

	Specify that the input profile is a sample-based profile.

	.. option:: -memop-sizes

	Show the profiled sizes of the memory intrinsic calls for shown functions.

	EXIT STATUS
	-----------

	:program:`llvm-profdata` returns 1 if the command is omitted or is invalid,
	if it cannot read input files, or if there is a mismatch between their data.