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ITS: skip processing entirely if no clusters/rofs in TF #14629

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Merged
mconcas merged 1 commit into from
Aug 27, 2025
Merged

ITS: skip processing entirely if no clusters/rofs in TF #14629

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25 changes: 14 additions & 11 deletions Detectors/ITSMFT/ITS/tracking/src/TrackingInterface.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -99,7 +99,7 @@ void ITSTrackingInterface::run(framework::ProcessingContext& pc)
irFrames.reserve(trackROFvec.size());
int nBCPerTF = alpParams.roFrameLengthInBC;

LOGP(info, "ITSTracker pulled {} clusters, {} RO frames", compClusters.size(), trackROFvec.size());
LOGP(info, "ITSTracker pulled {} clusters, {} RO frames {}", compClusters.size(), trackROFvec.size(), compClusters.empty() ? " -> received no processable data will skip" : "");
const dataformats::MCTruthContainer<MCCompLabel>* labels = nullptr;
gsl::span<itsmft::MC2ROFRecord const> mc2rofs;
if (mIsMC) {
Expand Down Expand Up @@ -157,7 +157,9 @@ void ITSTrackingInterface::run(framework::ProcessingContext& pc)
if (mRunVertexer) {
vertROFvec.reserve(trackROFvec.size());
// Run seeding vertexer
vertexerElapsedTime = mVertexer->clustersToVertices(logger);
if (!compClusters.empty()) {
vertexerElapsedTime = mVertexer->clustersToVertices(logger);
}
} else { // cosmics
mTimeFrame->resetRofPV();
}
Expand Down Expand Up @@ -226,7 +228,7 @@ void ITSTrackingInterface::run(framework::ProcessingContext& pc)
mTimeFrame->addPrimaryVertices(vtxVecLoc, 0);
}
}
if (mRunVertexer) {
if (mRunVertexer && !compClusters.empty()) {
LOG(info) << fmt::format(" - Vertex seeding total elapsed time: {} ms for {} ({} + {}) vertices found in {}/{} ROFs",
vertexerElapsedTime,
mTimeFrame->getPrimaryVerticesNum(),
Expand All @@ -244,14 +246,15 @@ void ITSTrackingInterface::run(framework::ProcessingContext& pc)
if (mCosmicsProcessing && compClusters.size() > 1500 * trackROFspan.size()) {
LOG(error) << "Cosmics processing was requested with an average detector occupancy exceeding 1.e-7, skipping TF processing.";
} else {

mTimeFrame->setMultiplicityCutMask(processingMask);
mTimeFrame->setROFMask(processUPCMask);
// Run CA tracker
if (mMode == o2::its::TrackingMode::Async && o2::its::TrackerParamConfig::Instance().fataliseUponFailure) {
mTracker->clustersToTracks(logger, fatalLogger);
} else {
mTracker->clustersToTracks(logger, errorLogger);
if (!compClusters.empty()) {
mTimeFrame->setMultiplicityCutMask(processingMask);
mTimeFrame->setROFMask(processUPCMask);
// Run CA tracker
if (mMode == o2::its::TrackingMode::Async && o2::its::TrackerParamConfig::Instance().fataliseUponFailure) {
mTracker->clustersToTracks(logger, fatalLogger);
} else {
mTracker->clustersToTracks(logger, errorLogger);
}
}
size_t totTracks{mTimeFrame->getNumberOfTracks()}, totClusIDs{mTimeFrame->getNumberOfUsedClusters()};
if (totTracks) {
Expand Down