docs/CommandGuide/llvm-profdata.rst - llvm-project/llvm - Git at Google

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

 .. program:: llvm-profdata

 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>`
 * :ref:`overlap <profdata-overlap>`

 .. 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 ``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:: -remapping-file=path, -r=path

   Specify a file which contains a remapping from symbol names in the input
   profile to the symbol names that should be used in the output profile. The
   file should consist of lines of the form ``<input-symbol> <output-symbol>``.
   Blank lines and lines starting with ``#`` are skipped.

   The :doc:`llvm-cxxmap <llvm-cxxmap>` tool can be used to generate the symbol
   remapping file.

 .. 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:: -extbinary

  Emit the profile using an extensible binary encoding. This option can only
  be used with sample-based profile. The extensible binary encoding can be
  more compact with compression enabled and can be loaded faster than the
  default binary encoding.

  .. 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.

 .. option:: -failure-mode=[any|all]

  Set the failure mode. There are two options: 'any' causes the merge command to
  fail if any profiles are invalid, and 'all' causes the merge command to fail
  only if all profiles are invalid. If 'all' is set, information from any
  invalid profiles is excluded from the final merged product. The default
  failure mode is 'any'.

 .. option:: -prof-sym-list=path

  Specify a file which contains a list of symbols to generate profile symbol
  list in the profile. This option can only be used with sample-based profile
  in extbinary format. The entries in this file are newline-separated.

 .. option:: -compress-all-sections=[true|false]

  Compress all sections when writing the profile. This option can only be used
  with sample-based profile in extbinary format.

 .. option:: -use-md5=[true|false]

  Use MD5 to represent string in name table when writing the profile.
  This option can only be used with sample-based profile in extbinary format.

 .. option:: -gen-partial-profile=[true|false]

  Mark the profile to be a partial profile which only provides partial profile
  coverage for the optimized target. This option can only be used with
  sample-based profile in extbinary format.

 .. option:: -supplement-instr-with-sample=path_to_sample_profile

  Supplement an instrumentation profile with sample profile. The sample profile
  is the input of the flag. Output will be in instrumentation format (only works
  with -instr).

 .. option:: -zero-counter-threshold=threshold_float_number

  For the function which is cold in instr profile but hot in sample profile, if
  the ratio of the number of zero counters divided by the the total number of
  counters is above the threshold, the profile of the function will be regarded
  as being harmful for performance and will be dropped.

 .. option:: -instr-prof-cold-threshold=threshold_int_number

  User specified cold threshold for instr profile which will override the cold
  threshold got from profile summary.

 .. option:: -suppl-min-size-threshold=threshold_int_number

  If the size of a function is smaller than the threshold, assume it can be
  inlined by PGO early inliner and it will not be adjusted based on sample
  profile.

 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.

 .. option:: -value-cutoff=n

  Show only those functions whose max count values are greater or equal to ``n``.
  By default, the value-cutoff is set to 0.

 .. option:: -list-below-cutoff

  Only output names of functions whose max count value are below the cutoff
  value.

 .. option:: -showcs

  Only show context sensitive profile counts. The default is to filter all
  context sensitive profile counts.

 .. option:: -show-prof-sym-list=[true|false]

  Show profile symbol list if it exists in the profile. This option is only
  meaningful for sample-based profile in extbinary format.

 .. option:: -show-sec-info-only=[true|false]

  Show basic information about each section in the profile. This option is
  only meaningful for sample-based profile in extbinary format.

 .. program:: llvm-profdata overlap

 .. _profdata-overlap:

 OVERLAP
 -------

 SYNOPSIS
 ^^^^^^^^

 :program:`llvm-profdata overlap` [*options*] [*base profile file*] [*test profile file*]

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

 :program:`llvm-profdata overlap` takes two profile data files and displays the
 *overlap* of counter distribution between the whole files and between any of the
 specified functions.

 In this command, *overlap* is defined as follows:
 Suppose *base profile file* has the following counts:
 {c1_1, c1_2, ..., c1_n, c1_u_1, c2_u_2, ..., c2_u_s},
 and *test profile file* has
 {c2_1, c2_2, ..., c2_n, c2_v_1, c2_v_2, ..., c2_v_t}.
 Here c{1|2}_i (i = 1 .. n) are matched counters and c1_u_i (i = 1 .. s) and
 c2_v_i (i = 1 .. v) are unmatched counters (or counters only existing in)
 *base profile file* and *test profile file*, respectively.
 Let sum_1 = c1_1 + c1_2 +  ... + c1_n +  c1_u_1 + c2_u_2 + ... + c2_u_s, and
 sum_2 = c2_1 + c2_2 + ... + c2_n + c2_v_1 + c2_v_2 + ... + c2_v_t.
 *overlap* = min(c1_1/sum_1, c2_1/sum_2) + min(c1_2/sum_1, c2_2/sum_2) + ...
 + min(c1_n/sum_1, c2_n/sum_2).

 The result overlap distribution is a percentage number, ranging from 0.0% to
 100.0%, where 0.0% means there is no overlap and 100.0% means a perfect
 overlap.

 Here is an example, if *base profile file* has counts of {400, 600}, and
 *test profile file* has matched counts of {60000, 40000}. The *overlap* is 80%.

 OPTIONS
 ^^^^^^^

 .. 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:: -o=output or -o output

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

 .. option:: -value-cutoff=n

  Show only those functions whose max count values are greater or equal to ``n``.
  By default, the value-cutoff is set to max of unsigned long long.

 .. option:: -cs

  Only show overlap for the context sensitive profile counts. The default is to show
  non-context sensitive profile counts.

 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
	=================================

	.. program:: llvm-profdata

	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>`
	* :ref:`overlap <profdata-overlap>`

	.. 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 ``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:: -remapping-file=path, -r=path

	Specify a file which contains a remapping from symbol names in the input
	profile to the symbol names that should be used in the output profile. The
	file should consist of lines of the form ``<input-symbol> <output-symbol>``.
	Blank lines and lines starting with ``#`` are skipped.

	The :doc:`llvm-cxxmap <llvm-cxxmap>` tool can be used to generate the symbol
	remapping file.

	.. 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:: -extbinary

	Emit the profile using an extensible binary encoding. This option can only
	be used with sample-based profile. The extensible binary encoding can be
	more compact with compression enabled and can be loaded faster than the
	default binary encoding.

	.. 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.

	.. option:: -failure-mode=[any\|all]

	Set the failure mode. There are two options: 'any' causes the merge command to
	fail if any profiles are invalid, and 'all' causes the merge command to fail
	only if all profiles are invalid. If 'all' is set, information from any
	invalid profiles is excluded from the final merged product. The default
	failure mode is 'any'.

	.. option:: -prof-sym-list=path

	Specify a file which contains a list of symbols to generate profile symbol
	list in the profile. This option can only be used with sample-based profile
	in extbinary format. The entries in this file are newline-separated.

	.. option:: -compress-all-sections=[true\|false]

	Compress all sections when writing the profile. This option can only be used
	with sample-based profile in extbinary format.

	.. option:: -use-md5=[true\|false]

	Use MD5 to represent string in name table when writing the profile.
	This option can only be used with sample-based profile in extbinary format.

	.. option:: -gen-partial-profile=[true\|false]

	Mark the profile to be a partial profile which only provides partial profile
	coverage for the optimized target. This option can only be used with
	sample-based profile in extbinary format.

	.. option:: -supplement-instr-with-sample=path_to_sample_profile

	Supplement an instrumentation profile with sample profile. The sample profile
	is the input of the flag. Output will be in instrumentation format (only works
	with -instr).

	.. option:: -zero-counter-threshold=threshold_float_number

	For the function which is cold in instr profile but hot in sample profile, if
	the ratio of the number of zero counters divided by the the total number of
	counters is above the threshold, the profile of the function will be regarded
	as being harmful for performance and will be dropped.

	.. option:: -instr-prof-cold-threshold=threshold_int_number

	User specified cold threshold for instr profile which will override the cold
	threshold got from profile summary.

	.. option:: -suppl-min-size-threshold=threshold_int_number

	If the size of a function is smaller than the threshold, assume it can be
	inlined by PGO early inliner and it will not be adjusted based on sample
	profile.

	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.

	.. option:: -value-cutoff=n

	Show only those functions whose max count values are greater or equal to ``n``.
	By default, the value-cutoff is set to 0.

	.. option:: -list-below-cutoff

	Only output names of functions whose max count value are below the cutoff
	value.

	.. option:: -showcs

	Only show context sensitive profile counts. The default is to filter all
	context sensitive profile counts.

	.. option:: -show-prof-sym-list=[true\|false]

	Show profile symbol list if it exists in the profile. This option is only
	meaningful for sample-based profile in extbinary format.

	.. option:: -show-sec-info-only=[true\|false]

	Show basic information about each section in the profile. This option is
	only meaningful for sample-based profile in extbinary format.

	.. program:: llvm-profdata overlap

	.. _profdata-overlap:

	OVERLAP
	-------

	SYNOPSIS
	^^^^^^^^

	:program:`llvm-profdata overlap` [options] [base profile file] [test profile file]

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

	:program:`llvm-profdata overlap` takes two profile data files and displays the
	overlap of counter distribution between the whole files and between any of the
	specified functions.

	In this command, overlap is defined as follows:
	Suppose base profile file has the following counts:
	{c1_1, c1_2, ..., c1_n, c1_u_1, c2_u_2, ..., c2_u_s},
	and test profile file has
	{c2_1, c2_2, ..., c2_n, c2_v_1, c2_v_2, ..., c2_v_t}.
	Here c{1\|2}_i (i = 1 .. n) are matched counters and c1_u_i (i = 1 .. s) and
	c2_v_i (i = 1 .. v) are unmatched counters (or counters only existing in)
	base profile file and test profile file, respectively.
	Let sum_1 = c1_1 + c1_2 + ... + c1_n + c1_u_1 + c2_u_2 + ... + c2_u_s, and
	sum_2 = c2_1 + c2_2 + ... + c2_n + c2_v_1 + c2_v_2 + ... + c2_v_t.
	overlap = min(c1_1/sum_1, c2_1/sum_2) + min(c1_2/sum_1, c2_2/sum_2) + ...
	+ min(c1_n/sum_1, c2_n/sum_2).

	The result overlap distribution is a percentage number, ranging from 0.0% to
	100.0%, where 0.0% means there is no overlap and 100.0% means a perfect
	overlap.

	Here is an example, if base profile file has counts of {400, 600}, and
	test profile file has matched counts of {60000, 40000}. The overlap is 80%.

	OPTIONS
	^^^^^^^

	.. 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:: -o=output or -o output

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

	.. option:: -value-cutoff=n

	Show only those functions whose max count values are greater or equal to ``n``.
	By default, the value-cutoff is set to max of unsigned long long.

	.. option:: -cs

	Only show overlap for the context sensitive profile counts. The default is to show
	non-context sensitive profile counts.

	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.