From: cblume <cblume@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Mon, 27 Jul 2009 08:48:42 +0000 (+0000)
Subject: Speed increase (mainly for offline), at least factor 2 for whole TRD offline reconstr... 
X-Git-Url: http://git.uio.no/git/?p=u%2Fmrichter%2FAliRoot.git;a=commitdiff_plain;h=f301a6562435d71afaf2c1bb86a7f0bb0c10dbe2

Speed increase (mainly for offline), at least factor 2 for whole TRD offline reconstruction, 10% for HLT
---

diff --git a/TRD/AliTRDseedV1.cxx b/TRD/AliTRDseedV1.cxx
index f9adde9d135..97237408a03 100644
--- a/TRD/AliTRDseedV1.cxx
+++ b/TRD/AliTRDseedV1.cxx
@@ -62,6 +62,9 @@
 
 ClassImp(AliTRDseedV1)
 
+TLinearFitter *AliTRDseedV1::fgFitterY = 0x0;
+TLinearFitter *AliTRDseedV1::fgFitterZ = 0x0;
+
 //____________________________________________________________________
 AliTRDseedV1::AliTRDseedV1(Int_t det) 
   :AliTRDtrackletBase()
@@ -90,7 +93,7 @@ AliTRDseedV1::AliTRDseedV1(Int_t det)
   //
   // Constructor
   //
-  for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1;
+  memset(fIndexes,0xFF,kNclusters*sizeof(fIndexes[0]));
   memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
   memset(fPad, 0, 3*sizeof(Float_t));
   fYref[0] = 0.; fYref[1] = 0.; 
@@ -593,10 +596,17 @@ Bool_t AliTRDseedV1::CookPID()
   CookdEdx(fReconstructor->GetNdEdxSlices());
   
   // Sets the a priori probabilities
-  for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
-    fProb[ispec] = pd->GetProbability(ispec, GetMomentum(), &fdEdx[0], length, GetPlane());	
+  if(fReconstructor->IsHLT()){
+    // this can be done here, because in HLT we have another NN
+    // don't run HLT with the normal NN because here we assume that the NN was trained with only two output neurons!
+    memset(fProb,0,AliPID::kSPECIES*sizeof(fProb[0]));
+    fProb[AliPID::kElectron] = pd->GetProbability(AliPID::kElectron, GetMomentum(), &fdEdx[0], length, GetPlane());
+    fProb[AliPID::kPion] = 1 - fProb[AliPID::kElectron];
   }
-
+  else
+    for(int ispec=0; ispec<AliPID::kSPECIES; ispec++)
+      fProb[ispec] = pd->GetProbability(ispec, GetMomentum(), &fdEdx[0], length, GetPlane());
+  
   return kTRUE;
 }
 
@@ -763,6 +773,21 @@ UShort_t AliTRDseedV1::GetVolumeId() const
   return fClusters[ic] ? fClusters[ic]->GetVolumeId() : 0;
 }
 
+//____________________________________________________________________
+TLinearFitter* AliTRDseedV1::GetFitterY()
+{
+  if(!fgFitterY) fgFitterY = new TLinearFitter(1, "pol1");
+  fgFitterY->ClearPoints();
+  return fgFitterY;
+}
+
+//____________________________________________________________________
+TLinearFitter* AliTRDseedV1::GetFitterZ()
+{
+  if(!fgFitterZ) fgFitterZ = new TLinearFitter(1, "pol1");
+  fgFitterZ->ClearPoints();
+  return fgFitterZ;
+}
 
 //____________________________________________________________________
 void AliTRDseedV1::Calibrate()
@@ -1219,9 +1244,9 @@ Bool_t AliTRDseedV1::Fit(Bool_t tilt, Bool_t zcorr)
   Double_t yt, zt;
 
   //AliTRDtrackerV1::AliTRDLeastSquare fitterZ;
-  TLinearFitter  fitterY(1, "pol1");
-  TLinearFitter  fitterZ(1, "pol1");
-  
+  TLinearFitter& fitterY=*GetFitterY();
+  TLinearFitter& fitterZ=*GetFitterZ();
+
   // book cluster information
   Double_t qc[kNclusters], xc[kNclusters], yc[kNclusters], zc[kNclusters], sy[kNclusters];
 
diff --git a/TRD/AliTRDseedV1.h b/TRD/AliTRDseedV1.h
index cf33dafaf6c..159b11b881d 100644
--- a/TRD/AliTRDseedV1.h
+++ b/TRD/AliTRDseedV1.h
@@ -38,6 +38,7 @@
 #include "AliTRDReconstructor.h"
 
 class TTreeSRedirector;
+class TLinearFitter;
 
 class AliRieman;
 
@@ -107,6 +108,8 @@ public:
   void      GetCalibParam(Float_t &exb, Float_t &vd, Float_t &t0, Float_t &s2, Float_t &dl, Float_t &dt) const    { 
               exb = fExB; vd = fVD; t0 = fT0; s2 = fS2PRF; dl = fDiffL; dt = fDiffT;}
   AliTRDcluster*  GetClusters(Int_t i) const               { return i<0 || i>=kNclusters ? 0x0 : fClusters[i];}
+  static TLinearFitter*  GetFitterY();
+  static TLinearFitter*  GetFitterZ();
   Int_t     GetIndexes(Int_t i) const{ return i<0 || i>=kNclusters ? -1 : fIndexes[i];}
   Int_t     GetLabels(Int_t i) const { return fLabels[i];}  
   Float_t   GetMomentum(Float_t *err = 0x0) const;
@@ -215,6 +218,8 @@ private:
   Int_t            fLabels[3];              // most frequent MC labels and total number of different labels
   Double_t         fRefCov[7];              // covariance matrix of the track in the yz plane + the rest of the diagonal elements
   Double_t         fCov[3];                 // covariance matrix of the tracklet in the xy plane
+  static TLinearFitter   *fgFitterY;
+  static TLinearFitter   *fgFitterZ;
 
   ClassDef(AliTRDseedV1, 7)                 // The offline TRD tracklet 
 };