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c65f25e192
Summary: The working set size heuristics (ProfileSummaryInfo::hasHugeWorkingSetSize) under the partial sample PGO may not be accurate because the profile is partial and the number of hot profile counters in the ProfileSummary may not reflect the actual working set size of the program being compiled. To improve this, the (approximated) ratio of the the number of profile counters of the program being compiled to the number of profile counters in the partial sample profile is computed (which is called the partial profile ratio) and the working set size of the profile is scaled by this ratio to reflect the working set size of the program being compiled and used for the working set size heuristics. The partial profile ratio is approximated based on the number of the basic blocks in the program and the NumCounts field in the ProfileSummary and computed through the thin LTO indexing. This means that there is the limitation that the scaled working set size is available to the thin LTO post link passes only. Reviewers: davidxl Subscribers: mgorny, eraman, hiraditya, steven_wu, dexonsmith, arphaman, dang, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D79831 |
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| .. | ||
| Caching.cpp | ||
| CMakeLists.txt | ||
| LLVMBuild.txt | ||
| LTO.cpp | ||
| LTOBackend.cpp | ||
| LTOCodeGenerator.cpp | ||
| LTOModule.cpp | ||
| SummaryBasedOptimizations.cpp | ||
| ThinLTOCodeGenerator.cpp | ||
| UpdateCompilerUsed.cpp | ||