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TPC Tracking: Workaround for 0-cluster tracks #5097

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Dec 25, 2020
Merged

TPC Tracking: Workaround for 0-cluster tracks #5097

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10 changes: 10 additions & 0 deletions Detectors/TPC/reconstruction/src/GPUCATracking.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -164,6 +164,16 @@ int GPUCATracking::runTracking(GPUO2InterfaceIOPtrs* data, GPUInterfaceOutputs*
for (char cside = 0; cside < 2; cside++) {
for (int i = 0; i < nTracks; i++) {
if (tracks[i].OK() && tracks[i].CSide() == cside) {
bool hasCl = false;
for (int j = 0; j < tracks[i].NClusters(); j++) {
if (!((trackClusters[tracks[i].FirstClusterRef() + j].state & flagsReject) || (ptrs.mergedTrackHitAttachment[trackClusters[tracks[i].FirstClusterRef() + j].num] & flagsRequired) != flagsRequired)) {
hasCl = true;
break;
}
}
if (!hasCl) {
continue;
}
trackSort[tmp++] = {i, tracks[i].GetParam().GetTZOffset()};
auto ncl = tracks[i].NClusters();
clBuff += ncl + (ncl + 1) / 2; // actual N clusters to store will be less
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1 change: 1 addition & 0 deletions GPU/GPUTracking/Merger/GPUTPCGMTrackParam.cxx
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Expand Up @@ -329,6 +329,7 @@ GPUd() bool GPUTPCGMTrackParam::Fit(const GPUTPCGMMerger* GPUrestrict() merger,
if (!(N + NTolerated >= GPUCA_TRACKLET_SELECTOR_MIN_HITS(mP[4]) && 2 * NTolerated <= CAMath::Max(10, N) && CheckNumericalQuality(covYYUpd))) {
return (false); // TODO: NTolerated should never become that large, check what is going wrong!
}
// TODO: we have looping tracks here with 0 accepted clusters in the primary leg. In that case we should refit the track using only the primary leg.

if (dEdxOut) {
dEdx.computedEdx(*dEdxOut, param);
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