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[StaleProfileMatching] Use only profile anchor size for similarity calculation #126783

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Merged
merged 2 commits into from
Feb 13, 2025
Merged

[StaleProfileMatching] Use only profile anchor size for similarity calculation #126783

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fec0a60
[StaleProfileMatching] Use only profile anchor size for similarity ca…
wlei-llvm Feb 11, 2025
dce2f9d
chang back similarity-threshold 80(will tune separately)
wlei-llvm Feb 13, 2025
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5 changes: 2 additions & 3 deletions llvm/lib/Transforms/IPO/SampleProfileMatcher.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -790,9 +790,8 @@ bool SampleProfileMatcher::functionMatchesProfileHelper(
longestCommonSequence(FilteredIRAnchorsList, FilteredProfileAnchorList,
false /* Match unused functions */);

Similarity =
static_cast<float>(MatchedAnchors.size()) * 2 /
(FilteredIRAnchorsList.size() + FilteredProfileAnchorList.size());
Similarity = static_cast<float>(MatchedAnchors.size()) /
FilteredProfileAnchorList.size();

LLVM_DEBUG(dbgs() << "The similarity between " << IRFunc.getName()
<< "(IR) and " << ProfFunc << "(profile) is "
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4 changes: 2 additions & 2 deletions llvm/test/Transforms/SampleProfile/pseudo-probe-stale-profile-renaming.ll
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@@ -1,14 +1,14 @@
; REQUIRES: x86_64-linux
; REQUIRES: asserts
; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/pseudo-probe-stale-profile-renaming.prof --salvage-stale-profile --salvage-unused-profile -report-profile-staleness -persist-profile-staleness -S --debug-only=sample-profile,sample-profile-matcher,sample-profile-impl -pass-remarks=inline --min-call-count-for-cg-matching=0 --min-func-count-for-cg-matching=0 2>&1 | FileCheck %s
; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/pseudo-probe-stale-profile-renaming.prof --salvage-stale-profile --salvage-unused-profile -report-profile-staleness -persist-profile-staleness -S --debug-only=sample-profile,sample-profile-matcher,sample-profile-impl -pass-remarks=inline --min-call-count-for-cg-matching=0 --min-func-count-for-cg-matching=0 --func-profile-similarity-threshold=70 2>&1 | FileCheck %s
; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/pseudo-probe-stale-profile-renaming.prof --salvage-stale-profile --salvage-unused-profile -S --debug-only=sample-profile,sample-profile-matcher,sample-profile-impl --min-call-count-for-cg-matching=10 --min-func-count-for-cg-matching=10 2>&1 | FileCheck %s --check-prefix=TINY-FUNC

; Verify find new IR functions.
; CHECK: Function new_block_only is not in profile or profile symbol list.
; CHECK: Function new_foo is not in profile or profile symbol list.

; CHECK: Run stale profile matching for main
; CHECK: The similarity between new_foo(IR) and foo(profile) is 0.86
; CHECK: The similarity between new_foo(IR) and foo(profile) is 0.75
; CHECK: Function:new_foo matches profile:foo
; CHECK: Run stale profile matching for cold_func
; CHECK: The checksums for new_block_only(IR) and block_only(Profile) match.
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