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PhotonXGBoostEstimator : set XGBoost to use one thread to avoid spawning hundreds of OpenMP threads #45042

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May 26, 2024
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3 changes: 3 additions & 0 deletions RecoEgamma/PhotonIdentification/src/PhotonXGBoostEstimator.cc
Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,9 @@

PhotonXGBoostEstimator::PhotonXGBoostEstimator(const edm::FileInPath& weightsFile, int best_ntree_limit) {
XGBoosterCreate(NULL, 0, &booster_);
// Set number of threads to 1, to avoid spawning hundreds of OpenMP threads
// See https://github.com/cms-sw/cmssw/issues/44923 for details
XGBoosterSetParam(booster_, "nthread", "1");
XGBoosterLoadModel(booster_, weightsFile.fullPath().c_str());
best_ntree_limit_ = best_ntree_limit;

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