ITS: GPU: disallow nROFsPerIterations (#14614)

Author: f3sch

Detectors/ITSMFT/ITS/tracking/GPU/cuda/TrackerTraitsGPU.cxx

@@ -57,8 +57,8 @@ void TrackerTraitsGPU<nLayers>::computeLayerTracklets(const int iteration, int i
 {
   const auto& conf = o2::its::ITSGpuTrackingParamConfig::Instance();
 
-  int startROF{this->mTrkParams[iteration].nROFsPerIterations > 0 ? iROFslice * this->mTrkParams[iteration].nROFsPerIterations : 0};
-  int endROF{o2::gpu::CAMath::Min(this->mTrkParams[iteration].nROFsPerIterations > 0 ? (iROFslice + 1) * this->mTrkParams[iteration].nROFsPerIterations + this->mTrkParams[iteration].DeltaROF : mTimeFrameGPU->getNrof(), mTimeFrameGPU->getNrof())};
+  int startROF{0};
+  int endROF{mTimeFrameGPU->getNrof()};
 
   // start by queuing loading needed of two last layers
   for (int iLayer{nLayers}; iLayer-- > nLayers - 2;) {

Detectors/ITSMFT/ITS/tracking/src/Tracker.cxx

@@ -85,7 +85,7 @@ void Tracker<nLayers>::clustersToTracks(const LogFunc& logger, const LogFunc& er
       }
       double timeTracklets{0.}, timeCells{0.}, timeNeighbours{0.}, timeRoads{0.};
       int nTracklets{0}, nCells{0}, nNeighbours{0}, nTracks{-static_cast<int>(mTimeFrame->getNumberOfTracks())};
-      int nROFsIterations = mTrkParams[iteration].nROFsPerIterations > 0 ? mTimeFrame->getNrof() / mTrkParams[iteration].nROFsPerIterations + bool(mTimeFrame->getNrof() % mTrkParams[iteration].nROFsPerIterations) : 1;
+      int nROFsIterations = (mTrkParams[iteration].nROFsPerIterations > 0 && !mTimeFrame->mIsGPU) ? mTimeFrame->getNrof() / mTrkParams[iteration].nROFsPerIterations + bool(mTimeFrame->getNrof() % mTrkParams[iteration].nROFsPerIterations) : 1;
       iVertex = std::min(maxNvertices, 0);
       logger(std::format("==== ITS {} Tracking iteration {} summary ====", mTraits->getName(), iteration));