Do not prescale ITS reco in FST unless FST_PRESCALE_ITS defined

Author: shahor02

prodtests/full-system-test/dpl-workflow.sh

@@ -111,11 +111,12 @@ if [[ $SYNCMODE == 1 ]]; then
     MCH_CONFIG_KEY="MCHTracking.maxCandidates=50000;MCHTracking.maxTrackingDuration=20;"
     MFT_CONFIG_KEY+="MFTTracking.cutMultClusLow=0;MFTTracking.cutMultClusHigh=20000;"
   elif [[ $BEAMTYPE == "pp" ]]; then
-    ITS_CONFIG_KEY+="fastMultConfig.cutMultClusLow=${CUT_MULT_MIN_ITS:--1};fastMultConfig.cutMultClusHigh=${CUT_MULT_MAX_ITS:-1};fastMultConfig.cutMultVtxHigh=${CUT_MULT_VTX_ITS:--1};ITSVertexerParam.phiCut=0.5;ITSVertexerParam.clusterContributorsCut=3;ITSVertexerParam.tanLambdaCut=0.2;"
+    ITS_CONFIG_KEY+="fastMultConfig.cutMultClusLow=${CUT_MULT_MIN_ITS:--1};fastMultConfig.cutMultClusHigh=${CUT_MULT_MAX_ITS:--1};fastMultConfig.cutMultVtxHigh=${CUT_MULT_VTX_ITS:--1};ITSVertexerParam.phiCut=0.5;ITSVertexerParam.clusterContributorsCut=3;ITSVertexerParam.tanLambdaCut=0.2;"
     MCH_CONFIG_KEY="MCHTracking.maxCandidates=20000;MCHTracking.maxTrackingDuration=10;"
     MFT_CONFIG_KEY+="MFTTracking.cutMultClusLow=0;MFTTracking.cutMultClusHigh=3000;"
   fi
   [[ ! -z ${CUT_RANDOM_FRACTION_ITS:-} ]] && ITS_CONFIG_KEY+="fastMultConfig.cutRandomFraction=$CUT_RANDOM_FRACTION_ITS;"
+  ITS_CONFIG_KEY+="ITSCATrackerParam.trackletsPerClusterLimit=${CUT_TRACKLETSPERCLUSTER_MAX_ITS:--1};ITSCATrackerParam.cellsPerClusterLimit=${CUT_CELLSPERCLUSTER_MAX_ITS:--1};"
   if has_detector_reco ITS; then
     [[ $RUNTYPE == "COSMICS" ]] && MFT_CONFIG_KEY+="MFTTracking.irFramesOnly=1;"
   fi

prodtests/full_system_test.sh

@@ -264,6 +264,22 @@ for STAGE in $STAGES; do
   export GLOBALDPLOPT
   export GPUMEMSIZE
 
+  # do not prescale ITS reconstruction in PbPb unless explicitly requested
+  if [[ -z ${FST_PRESCALE_ITS:-} ]] ; then
+    : ${CUT_RANDOM_FRACTION_ITS:=-1}
+    : ${CUT_MULT_MIN_ITS:=-1}
+    : ${CUT_MULT_MAX_ITS:=-1}
+    : ${CUT_MULT_VTX_ITS:=-1}
+    : ${CUT_TRACKLETSPERCLUSTER_MAX_ITS:=100}
+    : ${CUT_CELLSPERCLUSTER_MAX_ITS:=100}
+    export CUT_TRACKLETSPERCLUSTER_MAX_ITS
+    export CUT_CELLSPERCLUSTER_MAX_ITS
+    export CUT_RANDOM_FRACTION_ITS
+    export CUT_MULT_MIN_ITS
+    export CUT_MULT_MAX_ITS
+    export CUT_MULT_VTX_ITS
+  fi
+
   taskwrapper ${logfile} "$O2_ROOT/prodtests/full-system-test/dpl-workflow.sh"
 
   # --- record interesting metrics to monitor ----