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Profiling muon reco t139

Profiling muon reco t139. Paul Balm April 12, 2001. Outline. Looked at segmentreco, Combinatorial alg muo_trackreco, Fit alg (max 6 iters) Measurement details t01.39.00-maxopt on d0mino head version of muo_hit single muons with 1.1 minbias (1000 evts) jobs run in batch. Combi seg alg.

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Profiling muon reco t139

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  1. Profiling muon reco t139 Paul Balm April 12, 2001

  2. Outline • Looked at • segmentreco, Combinatorial alg • muo_trackreco, Fit alg (max 6 iters) • Measurement details • t01.39.00-maxopt on d0mino • head version of muo_hit • single muons with 1.1 minbias (1000 evts) • jobs run in batch Paul Balm

  3. Combi seg alg • CombinatorialSegmentBuilder::getSegments(PDTHitCollection, MDT..., MSC...) 15.4ms • 13.1 ms - MuoSegmentAlgCombi::findSegments(MuoHitCollection) • ~2.5 ms - conversion to MuoHitCollection • MuoSegmentAlgCombi::findSegments(MuoHitCollection) takes 13.1 ms and calls • 12.6 - createSegments(LocalWireHitVec) • 0.2 - createLocalHits • 0.2 - matchSegments • MuoSegmentAlgCombi::createSegments(LocalWireHitVec) takes 12.6 ms and calls • 10.1 - createSegments4Planes • 2.5 - cleanSegments • MuoSegmentAlgCombi::createSegments4Planes takes 10.1 ms and calls • 6.0 - MuoLocalSegment::addHit • 1.7 - MuoLocalSegment::fit • 0.6 - MuoLocalSegment::~MuoLocalSegment • 0.7 - MuoSegmentAlgCombi::createRoads Paul Balm

  4. Combi seg alg (2) • MuoLocalSegment::addHit takes 6.0 ms and calls • 2.3 - LocalPoint(MuoLocalSegment, LocalWireHit) • 2.1 - new & delete • 0.4 - LocalPoint::onTrack • MuoSegmentAlgCombi::cleanSegments takes 2.5 ms and calls • 2.5 - LocalSegment::intersect(LocalSegment) • MuoLocalSegment::intersect takes 2.4 ms (it's not just called by cleanSegments) and calls • 1.7 - MuoIndex::operator== Paul Balm

  5. RecommedationsCombinatorialSegBuilder • Recommendations for CombinatorialSegmentBuilder • the new&delete in MuoLocalSegment::addHit look like they could be removed • MuoLocalSegment::intersect does a lot of comparing MuoIndices. If that’s really necessary, speed up the comparison? • conversion SegmentCollection to MuoSegmentVector takes 2.5 ms Paul Balm

  6. MuoTrackAlgFit • MuoTrackAlgFit::findTracks(SegmentCollection) takes 132.9 ms and calls • ~0 ms/event - conversion to MuoSegmentVector • 132.9 ms/event - findTracks(MuoSegmentVector) • MuoTrackAlgFit::findTracks(MuoSegmentVector) takes 132.9 ms and calls • 132.9 - MuoTrackAlgFit::findTracks( pair<MuoSegmentVector, MuoTrackVector> ) • ~0 - groupSegments • MuoTrackAlgFit::findTracks( pair<MuoSegmentVector, MuoTrackVector> ) takes 132.9 ms and calls • 132.7 - SegmentFit::fit(Estimation, TrackParameters, vector<double> ) • 0.2 - computeEstimation • SegmentFit::fit(Estimation, TrackParameters, vector<double> ) takes 132.7 ms and calls • 127.6 - NonLinearFitter::doFit(Estimation, Matrix) • 4.9 - BackTrack::ParPropagate(TrackParameters, doubles) Paul Balm

  7. MuoTrackAlgFit (2) • NonLinearFitter::doFit(Estimation, Matrix) takes 127.6 ms and calls • 105.4 - NonLinearFitter::Derivative(Matrix, Matrix) • 21.1 - NonLinearFitter::ParPropagate(Matrix, double double double) • NonLinearFitter::Derivative(Matrix, Matrix) takes 105.8 ms and calls • 104.6 - NonLinearFitter::ParPropagate(Matrix, double double double) • NonLinearFitter::ParPropagate(Matrix, doubles…) takes 125.9 and calls • 125.6 - BackTrack::Propagate(TrackParameters, doubles...) • BackTrack::Propagate(TrackParameters, doubles...) takes 125.6 ms and calls • 85.8 - MagFieldPropagator::magFieldPropagator(TrackParameters, double) • 24.4 - Toroid::inToroidLoc • 3.7 - CartesianPoint constructors • M.F.Prop.::magFieldPropagator(TrackParameters, double) takes 85.8ms and calls • 22.1 - doStep(TrackParameters, SpaceVector) • 17.1 - SwapXYZ::apply with SpacePoint: 8.3, with SpaceVector: 4.7 • 3.9 - MagFieldTrack::fieldTrack • 8.5 - SpacePoint unit()= 7.5 and mag() = 1.0 Paul Balm

  8. RecommendationsMuoTrackAlgFit • 13 ms/event used by SwapXYZ::apply is spent in SpacePoint/Vector c’tors/d’tors - 10 ms/event in total • caching the return values of unit() and mag() of SpacePoint (only if the methods are being called on the same SpacePoint more than once) • It’s all in the SpacePoints Paul Balm

  9. Conclusions • L3 unpacking: 4 ms/event • CombinatorialSegmentBuilder: 15 ms/event • LinkedListSegmentBuilder: 32 ms/event • MuoTrackAlgFit (max 6 iters): 133 ms/event (first estimate “instantaneous”) • Overall: We’ve become pretty fast! Paul Balm

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