--help

Print a summary of command line options.

--output=<output>, -o

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

--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.

--input-files=<path>, -f

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>.

--remapping-file=<path>, -r

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 llvm-cxxmap tool can be used to generate the symbol remapping file.

--instr (default)

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

--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:

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

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.

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.

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

--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.

--num-threads=<N>, -j

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.

--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’.

--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.

--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.

--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.

--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.

--split-layout=[true|false]

Split the profile data section to two with one containing sample profiles with inlined functions and the other not. This option can only be used with sample-based profile in extbinary format.

--convert-sample-profile-layout=[nest|flat]

Convert the merged profile into a profile with a new layout. Supported layout are nest (Nested profile, the input should be CS flat profile) and flat (Profile with nested inlinees flattened out).

--supplement-instr-with-sample=<file>

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).

--zero-counter-threshold=<float>

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 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.

--instr-prof-cold-threshold=<int>

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

--suppl-min-size-threshold=<int>

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.

--debug-info=<path>

Specify the executable or .dSYM that contains debug info for the raw profile. When --debug-info-correlate or --profile-correlate=debug-info was used for instrumentation, use this option to correlate the raw profile.

--binary-file=<path>

Specify the executable that contains profile data and profile name sections for the raw profile. When -profile-correlate=binary was used for instrumentation, use this option to correlate the raw profile.

--debuginfod

Use debuginfod to find the associated executables that contain profile data and name sections for the raw profiles to correlate them. When -profile-correlate=binary was used for instrumentation, this option can be used for correlation.

--debug-file-directory=<dir>

Use provided local directories to search for executables that contain profile data and name sections for the raw profiles to correlate them. When -profile-correlate=binary was used for instrumentation, this option can be used for correlation.

--correlate=<kind>

Specify the correlation kind (debug_info or binary) to use when -debuginfod or -debug-file-directory=<dir> option is provided.

--temporal-profile-trace-reservoir-size

The maximum number of temporal profile traces to be stored in the output profile. If more traces are added, we will use reservoir sampling to select which traces to keep. Note that changing this value between different merge invocations on the same indexed profile could result in sample bias. The default value is 100.

--temporal-profile-max-trace-length

The maximum number of functions in a single temporal profile trace. Longer traces will be truncated. The default value is 1000.

--function=<string>

Only keep functions matching the regex in the output, all others are erased from the profile.

--no-function=<string>

Remove functions matching the regex from the profile. If both –function and –no-function are specified and a function matches both, it is removed.

--all-functions

Print details for every function.

--binary-ids

Print embedded binary ids in a profile.

--counts

Print the counter values for the displayed functions.

--show-format=<text|json|yaml>

Emit output in the selected format if supported by the provided profile type.

--function=<string>

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

--help

Print a summary of command line options.

--output=<output>, -o

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

--instr (default)

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

--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.

--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.

--sample

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

--memop-sizes

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

--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.

--list-below-cutoff

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

--profile-version

Print profile version.

--showcs

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

--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.

--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.

--debug-info=<path>

Specify the executable or .dSYM that contains debug info for the raw profile. When --debug-info-correlate or --profile-correlate=debug-info was used for instrumentation, use this option to show the correlated functions from the raw profile.

--covered

Show only the functions that have been executed, i.e., functions with non-zero counts.

--function=<string>

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

--help

Print a summary of command line options.

--output=<output>, -o

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

--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.

--cs

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

--help

Print a summary of command line options.

--output=<output>, -o

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