forked from OSchip/llvm-project
540489de68
Implemented the `llvm-profdata overlap` feature for sample profiles. It reports weighted //similarity// and unweighted //overlap// metrics at program and function level for two input profiles. Similarity metrics are symmetric with regards to the order of two input profiles. By default, the tool only reports program-level summary. Users can look into function-level details via additional options `--function`, `--similarity-cutoff`, and `--value-cutoff`.
The similarity metrics are designed as follows:
* Program-level summary
* Whole program profile similarity is an aggregate over function-level similarity `FS`: `PS = sum(FS(A) * avg_weight(A))` for all function `A`.
* Whole program sample overlap: `PSO = common_samples / total_samples`.
* Function overlap: `FO = #common_function / #total_function`.
* Hot-function overlap: `HFO = #common_hot_function / #total_hot_function`.
* Hot-block overlap: `HBO = #common_hot_block / #total_hot_block`.
* Function-level details
* Function-level similarity is an aggregate over line/block-level similarities `BS` of all sample lines/blocks in the function, weighted by the closeness of the function's weights in two profiles: `FS = sum(BS(i)) * (1 - weight_distance(A))`.
* Function-level sample overlap: `FSO = common_samples / total_samples` for samples in the function.
Reviewed By: wenlei, hoyFB, wmi
Differential Revision: https://reviews.llvm.org/D83852
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| .. | ||
| CSIR_profile.proftext | ||
| IR_profile.proftext | ||
| bad-hash.proftext | ||
| bar3-1.proftext | ||
| basic.proftext | ||
| c-general.profraw | ||
| clang_profile.proftext | ||
| compat-sample.profdata | ||
| compat.profdata.v1 | ||
| compat.profdata.v2 | ||
| compat.profdata.v4 | ||
| compressed.profraw | ||
| counter-mismatch-1.proftext | ||
| counter-mismatch-2.proftext | ||
| counter-mismatch-3.proftext | ||
| counter-mismatch-4.proftext | ||
| cs.proftext | ||
| cutoff.proftext | ||
| empty.proftext | ||
| extra-word.proftext | ||
| foo3-1.proftext | ||
| foo3-2.proftext | ||
| foo3bar3-1.proftext | ||
| gcc-sample-profile.gcov | ||
| header-directives-1.proftext | ||
| header-directives-2.proftext | ||
| header-directives-3.proftext | ||
| inline-samples.afdo | ||
| instr-remap.expected | ||
| instr-remap.proftext | ||
| instr-remap.remap | ||
| invalid-count-later.proftext | ||
| mix_instr.proftext | ||
| mix_sample.proftext | ||
| multiple-profdata-merge.proftext | ||
| no-counts.proftext | ||
| noncs.proftext | ||
| overflow-instr.proftext | ||
| overflow-sample.proftext | ||
| overlap_1.proftext | ||
| overlap_1_cs.proftext | ||
| overlap_1_vp.proftext | ||
| overlap_2.proftext | ||
| overlap_2_cs.proftext | ||
| overlap_2_vp.proftext | ||
| profile-symbol-list-1.text | ||
| profile-symbol-list-2.text | ||
| profile-symbol-list.expected | ||
| same-name-1.proftext | ||
| same-name-2.proftext | ||
| same-name-3.proftext | ||
| same-name-4.proftext | ||
| sample-hot-func-list.proftext | ||
| sample-overlap-0.proftext | ||
| sample-overlap-1.proftext | ||
| sample-overlap-2.proftext | ||
| sample-overlap-3.proftext | ||
| sample-overlap-4.proftext | ||
| sample-overlap-5.proftext | ||
| sample-profile.proftext | ||
| sample-remap.expected | ||
| sample-remap.proftext | ||
| sample-remap.remap | ||
| text-format-errors.text.bin | ||
| vp-malform.proftext | ||
| vp-malform2.proftext | ||
| vp-truncate.proftext | ||
| weight-instr-bar.profdata | ||
| weight-instr-foo.profdata | ||
| weight-sample-bar.proftext | ||
| weight-sample-foo.proftext | ||