Please consider the following formatting changes to #13731

GPU/GPUTracking/Base/GPUParam.cxx

@@ -120,18 +120,20 @@ void GPUParam::SetDefaults(float solenoidBz)
   par.toyMCEventsFlag = false;
   par.continuousTracking = false;
   continuousMaxTimeBin = 0;
+  tpcCutTimeBin = 0;
   par.debugLevel = 0;
   par.earlyTpcTransform = false;
 }
 
-void GPUParam::UpdateSettings(const GPUSettingsGRP* g, const GPUSettingsProcessing* p, const GPURecoStepConfiguration* w)
+void GPUParam::UpdateSettings(const GPUSettingsGRP* g, const GPUSettingsProcessing* p, const GPURecoStepConfiguration* w, const GPUSettingsRecDyn* d)
 {
   if (g) {
     UpdateBzOnly(g->solenoidBzNominalGPU);
     par.assumeConstantBz = g->constBz;
     par.toyMCEventsFlag = g->homemadeEvents;
     par.continuousTracking = g->grpContinuousMaxTimeBin != 0;
     continuousMaxTimeBin = g->grpContinuousMaxTimeBin == -1 ? GPUSettings::TPC_MAX_TF_TIME_BIN : g->grpContinuousMaxTimeBin;
+    tpcCutTimeBin = g->tpcCutTimeBin;
   }
   par.earlyTpcTransform = rec.tpc.forceEarlyTransform == -1 ? (!par.continuousTracking) : rec.tpc.forceEarlyTransform;
   qptB5Scaler = CAMath::Abs(bzkG) > 0.1f ? CAMath::Abs(bzkG) / 5.006680f : 1.f; // Repeat here, since passing in g is optional
@@ -145,6 +147,9 @@ void GPUParam::UpdateSettings(const GPUSettingsGRP* g, const GPUSettingsProcessi
       dodEdxDownscaled = (rand() % 100) < p->tpcDownscaledEdx;
     }
   }
+  if (d) {
+    rec.dyn = *d;
+  }
 }
 
 void GPUParam::UpdateBzOnly(float newSolenoidBz)

GPU/GPUTracking/Base/GPUParam.h

@@ -59,6 +59,7 @@ struct GPUParam_t {
 
   int8_t dodEdxDownscaled;
   int32_t continuousMaxTimeBin;
+  int32_t tpcCutTimeBin;
 
   GPUTPCGeometry tpcGeometry;                       // TPC Geometry
   GPUTPCGMPolynomialField polynomialField;          // Polynomial approx. of magnetic field for TPC GM
@@ -84,7 +85,7 @@ struct GPUParam : public internal::GPUParam_t<GPUSettingsRec, GPUSettingsParam>
 #ifndef GPUCA_GPUCODE
   void SetDefaults(float solenoidBz);
   void SetDefaults(const GPUSettingsGRP* g, const GPUSettingsRec* r = nullptr, const GPUSettingsProcessing* p = nullptr, const GPURecoStepConfiguration* w = nullptr);
-  void UpdateSettings(const GPUSettingsGRP* g, const GPUSettingsProcessing* p = nullptr, const GPURecoStepConfiguration* w = nullptr);
+  void UpdateSettings(const GPUSettingsGRP* g, const GPUSettingsProcessing* p = nullptr, const GPURecoStepConfiguration* w = nullptr, const GPUSettingsRecDynamic* d = nullptr);
   void UpdateBzOnly(float newSolenoidBz);
   void LoadClusterErrors(bool Print = 0);
   void UpdateRun3ClusterErrors(const float* yErrorParam, const float* zErrorParam);

GPU/GPUTracking/Base/GPUReconstruction.cxx

@@ -427,7 +427,7 @@ int32_t GPUReconstruction::InitPhaseAfterDevice()
     (mProcessors[i].proc->*(mProcessors[i].InitializeProcessor))();
   }
 
-  WriteConstantParams(); // First initialization, if the user doesn't use RunChains
+  WriteConstantParams(); // Initialize with initial values, can optionally be updated later
 
   mInitialized = true;
   return 0;
@@ -1105,7 +1105,12 @@ void GPUReconstruction::DumpSettings(const char* dir)
   }
 }
 
-void GPUReconstruction::UpdateSettings(const GPUSettingsGRP* g, const GPUSettingsProcessing* p)
+void GPUReconstruction::UpdateDynamicSettings(const GPUSettingsRecDynamic* d)
+{
+  UpdateSettings(nullptr, nullptr, d);
+}
+
+void GPUReconstruction::UpdateSettings(const GPUSettingsGRP* g, const GPUSettingsProcessing* p, const GPUSettingsRecDynamic* d)
 {
   if (g) {
     mGRPSettings = *g;
@@ -1114,8 +1119,11 @@ void GPUReconstruction::UpdateSettings(const GPUSettingsGRP* g, const GPUSetting
     mProcessingSettings.debugLevel = p->debugLevel;
     mProcessingSettings.resetTimers = p->resetTimers;
   }
-  GPURecoStepConfiguration w = mRecoSteps;
-  param().UpdateSettings(g, p, &w);
+  GPURecoStepConfiguration* w = nullptr;
+  if (mRecoSteps.steps.isSet(GPUDataTypes::RecoStep::TPCdEdx)) {
+    w = &mRecoSteps;
+  }
+  param().UpdateSettings(g, p, w, d);
   if (mInitialized) {
     WriteConstantParams();
   }

GPU/GPUTracking/Base/GPUReconstruction.h

@@ -200,7 +200,8 @@ class GPUReconstruction
   void SetSettings(const GPUSettingsGRP* grp, const GPUSettingsRec* rec = nullptr, const GPUSettingsProcessing* proc = nullptr, const GPURecoStepConfiguration* workflow = nullptr);
   void SetResetTimers(bool reset) { mProcessingSettings.resetTimers = reset; } // May update also after Init()
   void SetDebugLevelTmp(int32_t level) { mProcessingSettings.debugLevel = level; } // Temporarily, before calling SetSettings()
-  void UpdateSettings(const GPUSettingsGRP* g, const GPUSettingsProcessing* p = nullptr);
+  void UpdateSettings(const GPUSettingsGRP* g, const GPUSettingsProcessing* p = nullptr, const GPUSettingsRecDynamic* d = nullptr);
+  void UpdateDynamicSettings(const GPUSettingsRecDynamic* d);
   void SetOutputControl(const GPUOutputControl& v) { mOutputControl = v; }
   void SetOutputControl(void* ptr, size_t size);
   void SetInputControl(void* ptr, size_t size);

GPU/GPUTracking/Base/GPUReconstructionCPU.cxx

@@ -228,7 +228,7 @@ int32_t GPUReconstructionCPU::RunChains()
       mThreadId = GetThread();
     }
     if (mSlaves.size() || mMaster) {
-      WriteConstantParams(); // Reinitialize
+      WriteConstantParams(); // Reinitialize // TODO: Get this in sync with GPUChainTracking::DoQueuedUpdates, and consider the doublePipeline
     }
     for (uint32_t i = 0; i < mChains.size(); i++) {
       int32_t retVal = mChains[i]->RunChain();

GPU/GPUTracking/DataTypes/GPUNewCalibValues.cxx

@@ -24,4 +24,7 @@ void GPUNewCalibValues::updateFrom(const GPUNewCalibValues* from)
   if (from->newContinuousMaxTimeBin) {
     continuousMaxTimeBin = from->continuousMaxTimeBin;
   }
+  if (from->newTPCTimeBinCut) {
+    tpcTimeBinCut = from->tpcTimeBinCut;
+  }
 }

GPU/GPUTracking/DataTypes/GPUNewCalibValues.h

@@ -25,8 +25,10 @@ namespace gpu
 struct GPUNewCalibValues {
   bool newSolenoidField = false;
   bool newContinuousMaxTimeBin = false;
+  bool newTPCTimeBinCut = false;
   float solenoidField = 0.f;
   uint32_t continuousMaxTimeBin = 0;
+  int32_t tpcTimeBinCut = 0;
 
   void updateFrom(const GPUNewCalibValues* from);
 };

GPU/GPUTracking/DataTypes/GPUSettings.h

@@ -60,6 +60,7 @@ struct GPUSettingsGRP {
   int32_t grpContinuousMaxTimeBin = -2;   // 0 for triggered events, -1 for automatic setting, -2 invalid default
   int32_t needsClusterer = 0;             // Set to true if the data requires the clusterizer
   int32_t doCompClusterDecode = 0;        // Set to true if the data contains compressed TPC clusters
+  int32_t tpcCutTimeBin = 0;              // Cut TPC clusters and digits >= this cut
 };
 
 // Parameters of the current time frame

GPU/GPUTracking/Definitions/GPUSettingsList.h

@@ -181,6 +181,11 @@ AddOptionRTC(pileupBwdNBC, uint8_t, 80, "", 0, "Pre-trigger Pile-up integration
 AddHelp("help", 'h')
 EndConfig()
 
+// Dynamic settings, must NOT use AddOptionRTC(...) !!!
+BeginSubConfig(GPUSettingsRecDynamic, dyn, configStandalone.rec, "RECDYN", 0, "Reconstruction settings", rec_dyn)
+AddHelp("help", 'h')
+EndConfig()
+
 BeginSubConfig(GPUSettingsRec, rec, configStandalone, "REC", 0, "Reconstruction settings", rec)
 AddOptionRTC(maxTrackQPtB5, float, 1.f / GPUCA_MIN_TRACK_PTB5_DEFAULT, "", 0, "required max Q/Pt (==min Pt) of tracks")
 AddOptionRTC(nonConsecutiveIDs, int8_t, false, "", 0, "Non-consecutive cluster IDs as in HLT, disables features that need access to slice data in TPC merger")
@@ -193,6 +198,7 @@ AddOptionRTC(trackingRefitGPUModel, int8_t, 1, "", 0, "Use GPU track model for t
 AddCustomCPP(void SetMinTrackPtB5(float v) { maxTrackQPtB5 = v > 0.001f ? (1.f / v) : (1.f / 0.001f); })
 AddSubConfig(GPUSettingsRecTPC, tpc)
 AddSubConfig(GPUSettingsRecTRD, trd)
+AddSubConfig(GPUSettingsRecDynamic, dyn)
 AddHelp("help", 'h')
 EndConfig()
 

GPU/GPUTracking/Global/GPUChainTracking.cxx

@@ -641,7 +641,9 @@ int32_t GPUChainTracking::DoQueuedUpdates(int32_t stream, bool updateSlave)
       if (mNewCalibValues->newContinuousMaxTimeBin) {
         grp->grpContinuousMaxTimeBin = mNewCalibValues->continuousMaxTimeBin;
       }
-    }
+      if (mNewCalibValues->newTPCTimeBinCut) {
+        grp->tpcCutTimeBin = mNewCalibValues->tpcTimeBinCut;
+      }
   }
   if (GetProcessingSettings().tpcDownscaledEdx != 0) {
     p = &GetProcessingSettings();

GPU/GPUTracking/Global/GPUChainTrackingClusterizer.cxx

@@ -572,6 +572,7 @@ int32_t GPUChainTracking::RunTPCClusterizer(bool synchronizeOutput)
     return ForwardTPCDigits();
   }
 #ifdef GPUCA_TPC_GEOMETRY_O2
+  int32_t tpcTimeBinCut = mUpdateNewCalibObjects && mNewCalibValues->newTPCTimeBinCut ? mNewCalibValues->tpcTimeBinCut : param().tpcCutTimeBin;
   mRec->PushNonPersistentMemory(qStr2Tag("TPCCLUST"));
   const auto& threadContext = GetThreadContext();
   const bool doGPU = GetRecoStepsGPU() & RecoStep::TPCClusterFinding;

GPU/GPUTracking/Global/GPUChainTrackingCompression.cxx

@@ -225,8 +225,8 @@ int32_t GPUChainTracking::RunTPCDecompression()
       GPUError("Error decompressing clusters");
       return 1;
     }
-    if (GetProcessingSettings().tpcApplyCFCutsAtDecoding) {
-      RunTPCClusterFilter(mClusterNativeAccess.get(), allocatorFinal, true);
+    if (GetProcessingSettings().tpcApplyCFCutsAtDecoding || param().tpcCutTimeBin > 0) {
+      RunTPCClusterFilter(mClusterNativeAccess.get(), allocatorFinal, GetProcessingSettings().tpcApplyCFCutsAtDecoding);
     }
     decompressTimer.Stop();
     mIOPtrs.clustersNative = mClusterNativeAccess.get();

GPU/GPUTracking/Global/GPUChainTrackingDebugAndProfiling.cxx

@@ -315,6 +315,9 @@ void GPUChainTracking::RunTPCClusterFilter(o2::tpc::ClusterNativeAccess* cluster
             keep = keep && cl.qTot > param().rec.tpc.cfQTotCutoff && cl.qMax > param().rec.tpc.cfQMaxCutoff;
             keep = keep && (!(cl.getFlags() & o2::tpc::ClusterNative::flagSingle) || ((cl.sigmaPadPacked || cl.qMax > param().rec.tpc.cfQMaxCutoffSinglePad) && (cl.sigmaTimePacked || cl.qMax > param().rec.tpc.cfQMaxCutoffSingleTime)));
           }
+          if (param().tpcCutTimeBin > 0) {
+            keep = keep & cl.getTime() < param().tpcCutTimeBin;
+          }
           keep = keep && (!GetProcessingSettings().tpcApplyDebugClusterFilter || clusterFilter.filter(iSector, iRow, cl));
           if (iPhase && keep) {
             outputBuffer[countTotal] = cl;

GPU/Workflow/include/GPUWorkflow/GPUWorkflowSpec.h

@@ -233,6 +233,7 @@ class GPURecoWorkflowSpec : public o2::framework::Task
   bool mITSGeometryCreated = false;
   bool mTRDGeometryCreated = false;
   bool mPropagatorInstanceCreated = false;
+  int32_t mTPCCutAtTimeBin = -1;
 };
 
 } // end namespace gpu

GPU/Workflow/src/GPUWorkflowSpec.cxx

@@ -1013,9 +1013,8 @@ void GPURecoWorkflowSpec::doCalibUpdates(o2::framework::ProcessingContext& pc, c
       LOG(info) << "Updating solenoid field " << newCalibValues.solenoidField;
     }
     if (mAutoContinuousMaxTimeBin) {
-      mConfig->configGRP.grpContinuousMaxTimeBin = GPUO2InterfaceUtils::getTpcMaxTimeBinFromNHbf(mTFSettings->nHBFPerTF);
       newCalibValues.newContinuousMaxTimeBin = true;
-      newCalibValues.continuousMaxTimeBin = mConfig->configGRP.grpContinuousMaxTimeBin;
+      newCalibValues.continuousMaxTimeBin = mConfig->configGRP.grpContinuousMaxTimeBin = GPUO2InterfaceUtils::getTpcMaxTimeBinFromNHbf(mTFSettings->nHBFPerTF);
       LOG(info) << "Updating max time bin " << newCalibValues.continuousMaxTimeBin << " (" << mTFSettings->nHBFPerTF << " orbits)";
     }
 
@@ -1050,6 +1049,11 @@ void GPURecoWorkflowSpec::doCalibUpdates(o2::framework::ProcessingContext& pc, c
   if (mSpecConfig.runITSTracking) {
     needCalibUpdate = fetchCalibsCCDBITS(pc) || needCalibUpdate;
   }
+  if (mTPCCutAtTimeBin != mConfig->configGRP.tpcCutTimeBin) {
+    newCalibValues.newTPCTimeBinCut = true;
+    newCalibValues.tpcTimeBinCut = mConfig->configGRP.tpcCutTimeBin = mTPCCutAtTimeBin;
+    needCalibUpdate = true;
+  }
   if (needCalibUpdate) {
     LOG(info) << "Updating GPUReconstruction calibration objects";
     mGPUReco->UpdateCalibration(newCalibObjects, newCalibValues);
@@ -1098,6 +1102,7 @@ Inputs GPURecoWorkflowSpec::inputs()
   if (mSpecConfig.outputTracks || mSpecConfig.caClusterer) {
     // calibration objects for TPC clusterization
     inputs.emplace_back("tpcgain", gDataOriginTPC, "PADGAINFULL", 0, Lifetime::Condition, ccdbParamSpec(o2::tpc::CDBTypeMap.at(o2::tpc::CDBType::CalPadGainFull)));
+    inputs.emplace_back("tpcaltrosync", gDataOriginTPC, "ALTROSYNCSIGNAL", 0, Lifetime::Condition, ccdbParamSpec(o2::tpc::CDBTypeMap.at(o2::tpc::CDBType::AltroSyncSignal)));
   }
   if (mSpecConfig.outputTracks) {
     // calibration objects for TPC tracking

GPU/Workflow/src/GPUWorkflowTPC.cxx

@@ -308,6 +308,10 @@ bool GPURecoWorkflowSpec::fetchCalibsCCDBTPC<GPUCalibObjectsConst>(ProcessingCon
       pc.inputs().get<o2::tpc::CalDet<float>*>("tpcgain");
     }
 
+    if (mSpecConfig.outputTracks || mSpecConfig.caClusterer) {
+      mTPCCutAtTimeBin = pc.inputs().get<o2::tpc::CalDet<o2::tpc::AltroSyncSignal>*>("tpcaltrosync")->getTB2Cut(pc.services().get<o2::framework::TimingInfo>().tfCounter);
+    }
+
     // these calibrations are only defined for the tracking
     if (mSpecConfig.outputTracks) {
       // update the calibration objects in case they changed in the CCDB