GPU TPC: Clean up and fix resetT0 code

Author: davidrohr

GPU/GPUTracking/Merger/GPUTPCGMTrackParam.cxx

@@ -85,7 +85,8 @@ GPUd() bool GPUTPCGMTrackParam::Fit(GPUTPCGMMerger& GPUrestrict() merger, int32_
       StoreOuter(&track.OuterParam(), prop.GetAlpha());
     }
 
-    int32_t resetT0 = initResetT0();
+    int32_t resetT0 = CAMath::Max(10, CAMath::Min<int32_t>(40, 150.f / CAMath::Abs(mP[4])));
+    ;
     const bool refit = (nWays == 1 || iWay >= 1);
     const bool finalOutInFit = iWay + 2 >= nWays;
     const bool finalFit = iWay == nWays - 1;
@@ -239,9 +240,15 @@ GPUd() bool GPUTPCGMTrackParam::Fit(GPUTPCGMMerger& GPUrestrict() merger, int32_
         continue;
       }
 
-      int32_t retValHit = FitHit(merger, iTrk, track, xx, yy, zz, clusterState, clAlpha, iWay, inFlyDirection, deltaZ, lastUpdateX, clusters, prop, inter, dEdx, dEdxAlt, sumInvSqrtCharge, nAvgCharge, ihit, ihitMergeFirst, allowChangeClusters, refit, finalFit, nMissed, nMissed2, resetT0, uncorrectedY, retryAttempt);
+      int32_t retValHit = FitHit(merger, iTrk, track, xx, yy, zz, clusterState, clAlpha, iWay, inFlyDirection, deltaZ, lastUpdateX, clusters, prop, inter, dEdx, dEdxAlt, sumInvSqrtCharge, nAvgCharge, ihit, ihitMergeFirst, allowChangeClusters, refit, finalFit, nMissed, nMissed2, uncorrectedY, retryAttempt);
       if (retValHit == 0) {
         DodEdx(dEdx, dEdxAlt, merger, finalFit, ihit, ihitMergeFirst, wayDirection, clusters, clusterState, zz, dEdxSubThresholdRow);
+        if (CAMath::Abs(mP[4]) * param.qptB5Scaler > 10 && --resetT0 <= 0 && CAMath::Abs(mP[2]) < 0.15f && CAMath::Square(mP[0] - prop.Model().Y()) + CAMath::Square(mP[1] - prop.Model().Z()) > 1) {
+          CADEBUG(printf("Reinit linearization\n"));
+          prop.SetTrack(this, prop.GetAlpha());
+          resetT0 = 20;
+        }
+
         ihitStart = ihit;
         interpolatedStart = interpolationIndex;
         N++;
@@ -347,7 +354,7 @@ GPUdii() void GPUTPCGMTrackParam::HandleCrossCE(const GPUParam& GPUrestrict() pa
   }
 }
 
-GPUdii() int32_t GPUTPCGMTrackParam::FitHit(GPUTPCGMMerger& GPUrestrict() merger, const int32_t iTrk, const GPUTPCGMMergedTrack& GPUrestrict() track, const float xx, const float yy, const float zz, const uint8_t clusterState, const float clAlpha, const int32_t iWay, const bool inFlyDirection, float& GPUrestrict() deltaZ, float& GPUrestrict() lastUpdateX, GPUTPCGMMergedTrackHit* GPUrestrict() clusters, GPUTPCGMPropagator& GPUrestrict() prop, gputpcgmmergertypes::InterpolationErrorHit& GPUrestrict() inter, GPUdEdx& GPUrestrict() dEdx, GPUdEdx& GPUrestrict() dEdxAlt, float& GPUrestrict() sumInvSqrtCharge, int32_t& GPUrestrict() nAvgCharge, const int32_t ihit, const int32_t ihitMergeFirst, const bool allowChangeClusters, const bool refit, const bool finalFit, int32_t& GPUrestrict() nMissed, int32_t& GPUrestrict() nMissed2, int32_t& GPUrestrict() resetT0, float uncorrectedY, bool retryAttempt)
+GPUdii() int32_t GPUTPCGMTrackParam::FitHit(GPUTPCGMMerger& GPUrestrict() merger, const int32_t iTrk, const GPUTPCGMMergedTrack& GPUrestrict() track, const float xx, const float yy, const float zz, const uint8_t clusterState, const float clAlpha, const int32_t iWay, const bool inFlyDirection, float& GPUrestrict() deltaZ, float& GPUrestrict() lastUpdateX, GPUTPCGMMergedTrackHit* GPUrestrict() clusters, GPUTPCGMPropagator& GPUrestrict() prop, gputpcgmmergertypes::InterpolationErrorHit& GPUrestrict() inter, GPUdEdx& GPUrestrict() dEdx, GPUdEdx& GPUrestrict() dEdxAlt, float& GPUrestrict() sumInvSqrtCharge, int32_t& GPUrestrict() nAvgCharge, const int32_t ihit, const int32_t ihitMergeFirst, const bool allowChangeClusters, const bool refit, const bool finalFit, int32_t& GPUrestrict() nMissed, int32_t& GPUrestrict() nMissed2, float uncorrectedY, bool retryAttempt)
 {
   const GPUParam& GPUrestrict() param = merger.Param();
   const int32_t nWays = param.rec.tpc.nWays;
@@ -412,12 +419,6 @@ GPUdii() int32_t GPUTPCGMTrackParam::FitHit(GPUTPCGMMerger& GPUrestrict() merger
     lastUpdateX = mX;
     nMissed = nMissed2 = 0;
     UnmarkClusters(clusters, ihitMergeFirst, ihit, wayDirection, GPUTPCGMMergedTrackHit::flagHighIncl);
-    float dy = mP[0] - prop.Model().Y();
-    float dz = mP[1] - prop.Model().Z();
-    if (CAMath::Abs(mP[4]) * param.qptB5Scaler > 10 && --resetT0 <= 0 && CAMath::Abs(mP[2]) < 0.15f && dy * dy + dz * dz > 1) {
-      CADEBUG(printf("Reinit linearization\n"));
-      prop.SetTrack(this, prop.GetAlpha());
-    }
     return 0;                                                                            // ok
   } else if (retValInt || retValUpd >= GPUTPCGMPropagator::updateErrorClusterRejected) { // cluster far away form the track
     if (retValInt || allowChangeClusters) {

GPU/GPUTracking/Merger/GPUTPCGMTrackParam.h

@@ -156,7 +156,7 @@ class GPUTPCGMTrackParam
 
   GPUd() bool Fit(GPUTPCGMMerger& merger, int32_t iTrk, int32_t& N, int32_t& NTolerated, float& Alpha, GPUTPCGMMergedTrack& track, bool rebuilt, bool retryAttempt);
   GPUd() void DodEdx(GPUdEdx& dEdx, GPUdEdx& dEdxAlt, GPUTPCGMMerger& merger, bool finalFit, int ihit, int ihitMergeFirst, int wayDirection, const GPUTPCGMMergedTrackHit* clusters, uint8_t clusterState, float zz, uint8_t dEdxSubThresholdRow);
-  GPUd() int32_t FitHit(GPUTPCGMMerger& merger, const int32_t iTrk, const GPUTPCGMMergedTrack& track, const float xx, const float yy, const float zz, const uint8_t clusterState, const float clAlpha, const int32_t iWay, const bool inFlyDirection, float& deltaZ, float& lastUpdateX, GPUTPCGMMergedTrackHit* clusters, GPUTPCGMPropagator& prop, gputpcgmmergertypes::InterpolationErrorHit& inter, GPUdEdx& dEdx, GPUdEdx& dEdxAlt, float& sumInvSqrtCharge, int32_t& nAvgCharge, const int32_t ihit, const int32_t ihitMergeFirst, const bool allowChangeClusters, const bool refit, const bool finalFit, int32_t& nMissed, int32_t& nMissed2, int32_t& resetT0, float uncorrectedY, bool retryAttempt);
+  GPUd() int32_t FitHit(GPUTPCGMMerger& merger, const int32_t iTrk, const GPUTPCGMMergedTrack& track, const float xx, const float yy, const float zz, const uint8_t clusterState, const float clAlpha, const int32_t iWay, const bool inFlyDirection, float& deltaZ, float& lastUpdateX, GPUTPCGMMergedTrackHit* clusters, GPUTPCGMPropagator& prop, gputpcgmmergertypes::InterpolationErrorHit& inter, GPUdEdx& dEdx, GPUdEdx& dEdxAlt, float& sumInvSqrtCharge, int32_t& nAvgCharge, const int32_t ihit, const int32_t ihitMergeFirst, const bool allowChangeClusters, const bool refit, const bool finalFit, int32_t& nMissed, int32_t& nMissed2, float uncorrectedY, bool retryAttempt);
   GPUd() void FitAddRow(const int32_t iRow, const uint8_t sector, const int32_t iTrk, const GPUTPCGMMergedTrack& track, GPUTPCGMPropagator& prop, const bool inFlyDirection, GPUTPCGMMerger& merger, uint8_t* dEdxSubThresholdRow, const bool dodEdx, const bool doAttach, const uint8_t doInterpolate, gputpcgmmergertypes::InterpolationErrorHit& inter, const float deltaZ, const float sumInvSqrtCharge, const int32_t nAvgCharge);
   GPUd() void HandleCrossCE(const GPUParam& param, const uint8_t sector, const uint8_t& lastSector);
   GPUd() static void RefitTrack(GPUTPCGMMergedTrack& track, int32_t iTrk, GPUTPCGMMerger& merger, bool rebuilt, bool retryAttempt);
@@ -229,8 +229,6 @@ class GPUTPCGMTrackParam
   }
 
  private:
-  GPUd() int32_t initResetT0();
-
   float mX;        // x position
   float mTOffset;  // Z offset with early transform, T offset otherwise
   float mP[5];     // 'active' track parameters: Y, Z, SinPhi, DzDs, q/Pt
@@ -248,15 +246,6 @@ struct GPUTPCGMLoopData {
   uint8_t outwards;
 };
 
-GPUdi() int32_t GPUTPCGMTrackParam::initResetT0()
-{
-  const float absQPt = CAMath::Abs(mP[4]);
-  if (absQPt < (150.f / 40.f)) {
-    return 150.f / 40.f;
-  }
-  return CAMath::Max(10.f, 150.f / mP[4]);
-}
-
 GPUdi() void GPUTPCGMTrackParam::ResetCovariance()
 {
   mC[0] = 100.f;