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| author | Nathan Slingerland <slingn@gmail.com> | 2015-12-04 00:00:20 +0000 |
|---|---|---|
| committer | Nathan Slingerland <slingn@gmail.com> | 2015-12-04 00:00:20 +0000 |
| commit | b7250858d96b8ce567681214273ac0e62713c661 (patch) | |
| tree | 48bc628bc2143ee86fe13b3ea3dbab70a4966f9a /docs/CommandGuide | |
| parent | 7008dd751d0660fee014bb2fcc31c92eb540faa4 (diff) | |
[llvm-profdata] Add support for weighted merge of profile data
This change adds support for an optional weight when merging profile data with the llvm-profdata tool.
Weights are specified by adding an option ':<weight>' suffix to the input file names.
Adding support for arbitrary weighting of input profile data allows for relative importance to be placed on the
input data from multiple training runs.
Both sampled and instrumented profiles are supported.
Reviewers: dnovillo, bogner, davidxl
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D14547
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254669 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/CommandGuide')
| -rw-r--r-- | docs/CommandGuide/llvm-profdata.rst | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/docs/CommandGuide/llvm-profdata.rst b/docs/CommandGuide/llvm-profdata.rst index 210826a7bab..a4b18f301e4 100644 --- a/docs/CommandGuide/llvm-profdata.rst +++ b/docs/CommandGuide/llvm-profdata.rst @@ -28,7 +28,7 @@ MERGE SYNOPSIS ^^^^^^^^ -:program:`llvm-profdata merge` [*options*] [*filenames...*] +:program:`llvm-profdata merge` [*options*] [*filename[:weight]...*] DESCRIPTION ^^^^^^^^^^^ @@ -37,6 +37,10 @@ DESCRIPTION generated by PGO instrumentation and merges them together into a single indexed profile data file. +The profile counts in each input file can be scaled (multiplied) by specifying +``<filename>:<weight>``, where `<weight>` is a decimal integer >= 1. +A default weight of 1 is assumed if only `<filename>` is given. + OPTIONS ^^^^^^^ |