Improve logging in case of OOM (#13786)

Author: mconcas

Detectors/ITSMFT/ITS/tracking/include/ITStracking/TimeFrame.h

@@ -259,6 +259,7 @@ class TimeFrame
   void printCellLUTonLayer(int i);
   void printTrackletLUTs();
   void printCellLUTs();
+  void printROFInfo(const int rofId);
 
   IndexTableUtils mIndexTableUtils;
 

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

@@ -608,5 +608,19 @@ void TimeFrame::printNClsPerROF()
     std::cout << std::endl;
   }
 }
+
+void TimeFrame::printROFInfo(const int rofId)
+{
+  std::cout << "ROF " << rofId << " dump:" << std::endl;
+  for (int iLayer{0}; iLayer < mClusters.size(); ++iLayer) {
+    std::cout << "Layer " << iLayer << " has: " << getClustersOnLayer(rofId, iLayer).size() << " clusters." << std::endl;
+  }
+  std::cout << "Number of seeding vertices: " << getPrimaryVertices(rofId).size() << std::endl;
+  int iVertex{0};
+  for (auto& v : getPrimaryVertices(rofId)) {
+    std::cout << "\t vertex " << iVertex++ << ": x=" << v.getX() << " " << " y=" << v.getY() << " z=" << v.getZ() << " has " << v.getNContributors() << " contributors." << std::endl;
+  }
+}
+
 } // namespace its
 } // namespace o2

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

@@ -35,6 +35,7 @@ namespace o2
 {
 namespace its
 {
+using o2::its::constants::GB;
 
 Tracker::Tracker(o2::its::TrackerTraits* traits)
 {
@@ -74,25 +75,31 @@ void Tracker::clustersToTracks(std::function<void(std::string s)> logger, std::f
           &Tracker::computeTracklets, "Tracklet finding", [](std::string) {}, iteration, iROFs, iVertex);
         nTracklets += mTraits->getTFNumberOfTracklets();
         if (!mTimeFrame->checkMemory(mTrkParams[iteration].MaxMemory)) {
-          error(fmt::format("Too much memory used during trackleting in iteration {}, check the detector status and/or the selections.", iteration));
+          mTimeFrame->printROFInfo(iROFs);
+          error(fmt::format("Too much memory used during trackleting in iteration {} in ROF span {}-{}: {:.2f} GB. Current limit is {:.2f} GB, check the detector status and/or the selections.",
+                            iteration, iROFs, iROFs + mTrkParams[iteration].nROFsPerIterations, mTimeFrame->getArtefactsMemory() / GB, mTrkParams[iteration].MaxMemory / GB));
           break;
         }
         float trackletsPerCluster = mTraits->getTFNumberOfClusters() > 0 ? float(mTraits->getTFNumberOfTracklets()) / mTraits->getTFNumberOfClusters() : 0.f;
         if (trackletsPerCluster > mTrkParams[iteration].TrackletsPerClusterLimit) {
-          error(fmt::format("Too many tracklets per cluster ({}) in iteration {}, check the detector status and/or the selections. Current limit is {}", trackletsPerCluster, iteration, mTrkParams[iteration].TrackletsPerClusterLimit));
+          error(fmt::format("Too many tracklets per cluster ({}) in iteration {} in ROF span {}-{}:, check the detector status and/or the selections. Current limit is {}",
+                            trackletsPerCluster, iteration, iROFs, iROFs + mTrkParams[iteration].nROFsPerIterations, mTrkParams[iteration].TrackletsPerClusterLimit));
           break;
         }
 
         timeCells += evaluateTask(
           &Tracker::computeCells, "Cell finding", [](std::string) {}, iteration);
         nCells += mTraits->getTFNumberOfCells();
         if (!mTimeFrame->checkMemory(mTrkParams[iteration].MaxMemory)) {
-          error(fmt::format("Too much memory used during cell finding in iteration {}, check the detector status and/or the selections.", iteration));
+          mTimeFrame->printROFInfo(iROFs);
+          error(fmt::format("Too much memory used during cell finding in iteration {} in ROF span {}-{}: {:.2f} GB. Current limit is {:.2f} GB, check the detector status and/or the selections.",
+                            iteration, iROFs, iROFs + mTrkParams[iteration].nROFsPerIterations, mTimeFrame->getArtefactsMemory() / GB, mTrkParams[iteration].MaxMemory / GB));
           break;
         }
         float cellsPerCluster = mTraits->getTFNumberOfClusters() > 0 ? float(mTraits->getTFNumberOfCells()) / mTraits->getTFNumberOfClusters() : 0.f;
         if (cellsPerCluster > mTrkParams[iteration].CellsPerClusterLimit) {
-          error(fmt::format("Too many cells per cluster ({}) in iteration {}, check the detector status and/or the selections. Current limit is {}", cellsPerCluster, iteration, mTrkParams[iteration].CellsPerClusterLimit));
+          error(fmt::format("Too many cells per cluster ({}) in iteration {} in ROF span {}-{}, check the detector status and/or the selections. Current limit is {}",
+                            cellsPerCluster, iteration, iROFs, iROFs + mTrkParams[iteration].nROFsPerIterations, mTrkParams[iteration].CellsPerClusterLimit));
           break;
         }