GPU: Add option to steer which attachment steps to run during rebuild

Author: davidrohr

GPU/GPUTracking/Definitions/GPUSettingsList.h

@@ -142,13 +142,14 @@ AddOptionRTC(cfEdgeTwoPads, uint8_t, 0, "", 0, "Flag clusters with peak on the 2
 AddOptionRTC(nWays, uint8_t, 3, "", 0, "Do N fit passes in final fit of merger (must be odd to end with inward fit)")
 AddOptionRTC(rebuildTrackInFit, uint8_t, 1, "", 0, "Rebuild track completely during fit based on clusters closed to interpolated track positions")
 AddOptionRTC(rebuildTrackInFitClusterCandidates, uint8_t, 3, "", 0, "Number of cluster candidates per row for rebuilt track")
+AddOptionRTC(disableRebuildAttachment, uint8_t, 0, "", 0, "Bitmask to disable certain attachment steps during track rebuid (1: current row, 2: interpolate missing row, 4: one sided interpolation, 8: original hit)")
+AddOptionRTC(disableMarkAdjacent, uint8_t, 0, "", 0, "Bitmask to disable certain steps during refit to mark adjacenrt clusters (1: current row, 2: extrapolate missing rows, 4: loop following)") // TODO: Add history
 AddOptionRTC(trackFitRejectMode, int8_t, 5, "", 0, "0: no limit on rejection or missed hits, >0: break after n rejected hits")
 AddOptionRTC(rejectIFCLowRadiusCluster, uint8_t, 1, "", 0, "Reject clusters that get the IFC mask error during refit")
 AddOptionRTC(dEdxTruncLow, uint8_t, 2, "", 0, "Low truncation threshold, fraction of 128")
 AddOptionRTC(dEdxTruncHigh, uint8_t, 77, "", 0, "High truncation threshold, fraction of 128")
 AddOptionRTC(extrapolationTracking, int8_t, 1, "", 0, "Enable Extrapolation Tracking (prolong tracks to adjacent sectors to find short segments)")
-AddOptionRTC(disableRefitAttachment, uint8_t, 0, "", 0, "Bitmask to disable certain attachment steps during refit (1: attachment, 2: propagation, 4: loop following)")
-AddOptionRTC(looperFollowMode, uint8_t, 1, "", 0, "0 = simple, 1 = advances, for disabling use disableRefitAttachment = 4")
+AddOptionRTC(looperFollowMode, uint8_t, 1, "", 0, "0 = simple, 1 = advances, for disabling use disableMarkAdjacent = 4")
 AddOptionRTC(rejectionStrategy, uint8_t, o2::gpu::GPUSettings::RejectionStrategyA, "", 0, "Enable rejection of TPC clusters for compression (0 = no, 1 = strategy A, 2 = strategy B)")
 AddOptionRTC(mergeLoopersAfterburner, uint8_t, 1, "", 0, "Run afterburner for additional looper merging")
 AddOptionRTC(compressionTypeMask, uint8_t, o2::gpu::GPUSettings::CompressionFull, "", 0, "TPC Compression mode bits (1=truncate charge/width LSB, 2=differences, 4=track-model)")
@@ -171,7 +172,7 @@ AddOptionRTC(rejectEdgeClustersInTrackFit, int8_t, 0, "", 0, "Reject edge cluste
 AddOptionRTC(tubeExtraProtectMinRow, uint8_t, 20, "", 0, "Increase Protection, decrease removal by factor 2, when below this row")
 AddOptionRTC(tubeExtraProtectEdgePads, uint8_t, 2, "", 0, "Increase Protection, decrease removal by factor 2, when on this number of pads from the edge")
 
-AddOptionArray(PID_remap, int8_t, 9, (0, 1, 2, 3, 4, 5, 6, 7, 8), "", 0, "Remap Ipid to PID_reamp[Ipid] (no remap if<0)") // BUG: CUDA cannot yet hand AddOptionArrayRTC
+AddOptionArray(PID_remap, int8_t, 9, (0, 1, 2, 3, 4, 5, 6, 7, 8), "", 0, "Remap Ipid to PID_reamp[Ipid] (no remap if<0)") // BUG: CUDA cannot yet handle AddOptionArrayRTC
 AddHelp("help", 'h')
 EndConfig()
 

GPU/GPUTracking/Merger/GPUTPCGMMerger.cxx

@@ -2144,16 +2144,18 @@ GPUd() void GPUTPCGMMerger::PrepareHitWeights(int32_t nBlocks, int32_t nThreads,
       continue;
     }
     mTrackRebuildHelper[i].reverse = mClusters[trk.FirstClusterRef()].row < mClusters[trk.FirstClusterRef() + trk.NClusters() - 1].row;
-    int lastRow = -1;
-    for (uint32_t j = 0; j < trk.NClusters(); j++) {
-      const auto& cl = mClusters[trk.FirstClusterRef() + j];
-      auto* candidates = &mClusterCandidates[(i * GPUTPCGeometry::NROWS + cl.row) * Param().rec.tpc.rebuildTrackInFitClusterCandidates];
-      if (cl.row != lastRow && candidates[0].id == 0 && (!(cl.state & GPUTPCGMMergedTrackHit::flagReject) || trk.GetParam().GetNDF() <= 0)) {
-        candidates[0].id = cl.num + 2;
-        candidates[0].best = 128;
-        candidates[0].weight = cl.state;
-        candidates[0].sector = cl.sector;
-        lastRow = cl.row;
+    if (!(Param().rec.tpc.disableRebuildAttachment & 8)) {
+      int lastRow = -1;
+      for (uint32_t j = 0; j < trk.NClusters(); j++) {
+        const auto& cl = mClusters[trk.FirstClusterRef() + j];
+        auto* candidates = &mClusterCandidates[(i * GPUTPCGeometry::NROWS + cl.row) * Param().rec.tpc.rebuildTrackInFitClusterCandidates];
+        if (cl.row != lastRow && candidates[0].id == 0 && (!(cl.state & GPUTPCGMMergedTrackHit::flagReject) || trk.GetParam().GetNDF() <= 0)) {
+          candidates[0].id = cl.num + 2;
+          candidates[0].best = 128;
+          candidates[0].weight = cl.state;
+          candidates[0].sector = cl.sector;
+          lastRow = cl.row;
+        }
       }
     }
   }

GPU/GPUTracking/Merger/GPUTPCGMTrackParam.cxx

@@ -136,8 +136,8 @@ GPUd() bool GPUTPCGMTrackParam::Fit(GPUTPCGMMerger& GPUrestrict() merger, int32_
       uint8_t dEdxSubThresholdRow = 255;
       if (lastPropagateRow != 255 && CAMath::Abs(cluster.row - lastPropagateRow) > 1) {
         const bool dodEdx = param.dodEdxEnabled && param.rec.tpc.adddEdxSubThresholdClusters && finalFit && CAMath::Abs(cluster.row - lastUpdateRow) == 2 && cluster.sector == lastSector && currentClusterStatus == 0;
-        const bool doAttach = allowChangeClusters && !param.rec.tpc.rebuildTrackInFit && !(merger.Param().rec.tpc.disableRefitAttachment & 2);
-        const uint8_t doInterpolate = (param.rec.tpc.rebuildTrackInFit && iWay == nWays - 3) ? 1 : ((param.rec.tpc.rebuildTrackInFit && iWay == nWays - 2) ? 2 : 0);
+        const bool doAttach = allowChangeClusters && !param.rec.tpc.rebuildTrackInFit && !(merger.Param().rec.tpc.disableMarkAdjacent & 2);
+        const uint8_t doInterpolate = (param.rec.tpc.disableRebuildAttachment & 2) ? 0 : ((param.rec.tpc.rebuildTrackInFit && iWay == nWays - 3) ? 1 : ((param.rec.tpc.rebuildTrackInFit && iWay == nWays - 2) ? 2 : 0));
         if (lastUpdateRow != 255 && (dodEdx || doAttach || doInterpolate)) {
           int32_t step = cluster.row > lastPropagateRow ? 1 : -1;
           uint8_t sector = lastSector;
@@ -168,7 +168,7 @@ GPUd() bool GPUTPCGMTrackParam::Fit(GPUTPCGMMerger& GPUrestrict() merger, int32_
         MarkClusters(clusters, ihitMergeFirst, ihit, wayDirection, GPUTPCGMMergedTrackHit::flagHighIncl);
         nMissed2++;
         NTolerated++;
-        if (param.rec.tpc.rebuildTrackInFit && iWay == nWays - 2 && param.rec.tpc.rebuildTrackMaxNonIntCov > 0) {
+        if (param.rec.tpc.rebuildTrackInFit && iWay == nWays - 2 && param.rec.tpc.rebuildTrackMaxNonIntCov > 0 && !(param.rec.tpc.disableRebuildAttachment & 4)) {
           FindBestInterpolatedHit(merger, inter, cluster.sector, cluster.row, deltaZ, sumInvSqrtCharge, nAvgCharge, prop, iTrk, true); // TODO: mark clusters from single-sided finding as dubious, and apply stricter restriction cut later
         }
         continue;
@@ -178,7 +178,7 @@ GPUd() bool GPUTPCGMTrackParam::Fit(GPUTPCGMMerger& GPUrestrict() merger, int32_
       CADEBUG(printf("\t%21sPropaga Alpha %8.3f    , X %8.3f - Y %8.3f, Z %8.3f   -   QPt %7.2f (%7.2f), SP %5.2f (%5.2f)   ---   Res %8.3f %8.3f   ---   Cov sY %8.3f sZ %8.3f sSP %8.3f sPt %8.3f   -   YPt %8.3f   -   PErr %d\n", "", prop.GetAlpha(), mX, mP[0], mP[1], mP[4], prop.GetQPt0(), mP[2], prop.GetSinPhi0(), mP[0] - yy, mP[1] - zz, sqrtf(mC[0]), sqrtf(mC[2]), sqrtf(mC[5]), sqrtf(mC[14]), mC[10], retValProp));
       // clang-format on
       if (mNDF >= 0 && (mC[0] > param.rec.tpc.trackFitCovLimit || mC[2] > param.rec.tpc.trackFitCovLimit)) {
-        if (param.rec.tpc.rebuildTrackInFit && iWay == nWays - 2 && param.rec.tpc.rebuildTrackMaxNonIntCov > 0) {
+        if (param.rec.tpc.rebuildTrackInFit && iWay == nWays - 2 && param.rec.tpc.rebuildTrackMaxNonIntCov > 0 && !(param.rec.tpc.disableRebuildAttachment & 4)) {
           InterpolateMissingRows(merger, interpolation, clusters, ihit, interpolationIndex, cluster.row, deltaZ, sumInvSqrtCharge, nAvgCharge, prop, iTrk);
         }
         break; // bad chi2 for the whole track, stop the fit
@@ -191,15 +191,16 @@ GPUd() bool GPUTPCGMTrackParam::Fit(GPUTPCGMMerger& GPUrestrict() merger, int32_
 
       float uncorrectedY = -1e6f;
       if (param.rec.tpc.rebuildTrackInFit) {
-        if (iWay == nWays - 2) {
-          uncorrectedY = FindBestInterpolatedHit(merger, inter, cluster.sector, cluster.row, deltaZ, sumInvSqrtCharge, nAvgCharge, prop, iTrk, false);
+        if (iWay == nWays - 2 && !(param.rec.tpc.disableRebuildAttachment & 1)) {
+          uncorrectedY = FindBestInterpolatedHit(merger, inter, cluster.sector, cluster.row, deltaZ, sumInvSqrtCharge, nAvgCharge, prop, iTrk, false); // TODO: Check whether we do not need to use track Y for some rejection steps
         }
         if (allowChangeClusters) {
           AttachClusters(merger, cluster.sector, cluster.row, iTrk, track.Leg() == 0, prop); // TODO: Do this during FindBestInterpolatedHit
         }
       } else if (allowChangeClusters) {
         uncorrectedY = AttachClusters(merger, cluster.sector, cluster.row, iTrk, track.Leg() == 0, prop);
-      } else if (param.rec.tpc.rejectEdgeClustersInTrackFit) {
+      }
+      if (param.rec.tpc.rejectEdgeClustersInTrackFit && uncorrectedY <= -1e6f) {
         float tmpZ;
         merger.GetConstantMem()->calibObjects.fastTransform->InverseTransformYZtoNominalYZ(cluster.sector, cluster.row, mP[0], mP[1], uncorrectedY, tmpZ);
       }
@@ -259,7 +260,7 @@ GPUd() bool GPUTPCGMTrackParam::Fit(GPUTPCGMMerger& GPUrestrict() merger, int32_
         N++;
         covYYUpd = mC[0];
       } else if (retValHit == 1) {
-        if (param.rec.tpc.rebuildTrackInFit && iWay == nWays - 2 && param.rec.tpc.rebuildTrackMaxNonIntCov > 0) {
+        if (param.rec.tpc.rebuildTrackInFit && iWay == nWays - 2 && param.rec.tpc.rebuildTrackMaxNonIntCov > 0 && !(param.rec.tpc.disableRebuildAttachment & 4)) {
           InterpolateMissingRows(merger, interpolation, clusters, ihit + wayDirection, interpolationIndex + wayDirection, cluster.row, deltaZ, sumInvSqrtCharge, nAvgCharge, prop, iTrk);
         }
         break;
@@ -268,7 +269,7 @@ GPUd() bool GPUTPCGMTrackParam::Fit(GPUTPCGMMerger& GPUrestrict() merger, int32_
       lastUpdateRow = cluster.row;
       assert(!param.rec.tpc.mergerInterpolateErrors || rebuilt || iWay != nWays - 2 || ihit || interpolationIndex == 0);
     }
-    if (finalOutInFit && !(param.rec.tpc.disableRefitAttachment & 4) && lastUpdateRow != 255 && !retryAttempt) {
+    if (finalOutInFit && !(param.rec.tpc.disableMarkAdjacent & 4) && lastUpdateRow != 255 && !retryAttempt) {
       StoreLoopPropagation(merger, lastSector, lastUpdateRow, iTrk, lastUpdateRow > clusters[(iWay & 1) ? (maxN - 1) : 0].row, prop.GetAlpha());
       CADEBUG(printf("\t\tSTORING %d lastUpdateRow %d row %d out %d\n", iTrk, (int)lastUpdateRow, (int)clusters[(iWay & 1) ? (maxN - 1) : 0].row, lastUpdateRow > clusters[(iWay & 1) ? (maxN - 1) : 0].row));
     }
@@ -772,7 +773,7 @@ GPUd() float GPUTPCGMTrackParam::AttachClusters(const GPUTPCGMMerger& GPUrestric
 GPUd() float GPUTPCGMTrackParam::AttachClusters(const GPUTPCGMMerger& GPUrestrict() merger, int32_t sector, int32_t iRow, int32_t iTrack, bool goodLeg, float Y, float Z)
 {
   const GPUParam& GPUrestrict() param = merger.Param();
-  if (param.rec.tpc.disableRefitAttachment & 1) {
+  if (param.rec.tpc.disableMarkAdjacent & 1) {
     return -1e6f;
   }
   const GPUTPCTracker& GPUrestrict() tracker = *(merger.GetConstantMem()->tpcTrackers + sector);

GPU/GPUTracking/Standalone/Benchmark/standalone.cxx

@@ -498,7 +498,7 @@ int32_t SetupReconstruction()
     if (recSet.tpc.rejectionStrategy >= GPUSettings::RejectionStrategyB) {
       procSet.tpcInputWithClusterRejection = 1;
     }
-    recSet.tpc.disableRefitAttachment = 0xFF;
+    recSet.tpc.disableMarkAdjacent = 0xFF;
     recSet.maxTrackQPtB5 = CAMath::Min(recSet.maxTrackQPtB5, recSet.tpc.rejectQPtB5);
     GPUChainTracking::ApplySyncSettings(procSet, recSet, steps.steps, false, configStandalone.rundEdx);
     recAsync->SetSettings(&grp, &recSet, &procSet, &steps);