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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| .. | ||
| Inputs | ||
| c-general.test | ||
| compact-sample.proftext | ||
| compat.proftext | ||
| count-mismatch.proftext | ||
| csprof-dump.test | ||
| cutoff.test | ||
| gcc-gcov-sample-profile.test | ||
| general.proftext | ||
| hash-mismatch.proftext | ||
| header-directives.test | ||
| inline-samples.test | ||
| input-dir.test | ||
| input-filenames.test | ||
| instr-remap.test | ||
| invalid-profdata.test | ||
| lit.local.cfg | ||
| malformed-ptr-to-counter-array.test | ||
| memop-size-prof.proftext | ||
| merge_empty_profile.test | ||
| multiple-inputs.test | ||
| multiple-profdata-merge.test | ||
| nocompress.test | ||
| overflow-instr.test | ||
| overflow-sample.test | ||
| overlap.test | ||
| overlap_cs.test | ||
| overlap_vp.test | ||
| profile-symbol-list-compress.test | ||
| profile-symbol-list.test | ||
| raw-32-bits-be.test | ||
| raw-32-bits-le.test | ||
| raw-64-bits-be.test | ||
| raw-64-bits-le.test | ||
| raw-magic-but-no-header.test | ||
| raw-two-profiles.test | ||
| roundtrip-compress.test | ||
| roundtrip.test | ||
| same-filename.test | ||
| sample-hot-func-list.test | ||
| sample-overlap.test | ||
| sample-profile-basic.test | ||
| sample-remap.test | ||
| sample-summary.test | ||
| show-instr-level.test | ||
| show-prof-info.test | ||
| suppl-instr-with-sample.test | ||
| text-dump.test | ||
| text-format-errors.test | ||
| threaded-count-mismatch.test | ||
| value-prof.proftext | ||
| weight-instr.test | ||
| weight-sample.test | ||