ITS: increase default threads to 2

Author: f3sch

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

@@ -49,7 +49,7 @@ struct VertexerParamConfig : public o2::conf::ConfigurableParamHelper<VertexerPa
   int ZBins = 1;     // z-phi index table configutation: number of z bins
   int PhiBins = 128; // z-phi index table configutation: number of phi bins
 
-  int nThreads = 1;
+  int nThreads = 2;
   bool printMemory = false;
   size_t maxMemory = std::numeric_limits<size_t>::max();
   bool dropTFUponFailure = false;
@@ -94,7 +94,7 @@ struct TrackerParamConfig : public o2::conf::ConfigurableParamHelper<TrackerPara
   int trackingMode = -1;                   // -1: unset, 0=sync, 1=async, 2=cosmics used by gpuwf only
   bool doUPCIteration = false;             // Perform an additional iteration for UPC events on tagged vertices. You want to combine this config with VertexerParamConfig.nIterations=2
 
-  int nThreads = 1;
+  int nThreads = 2;
   bool printMemory = false;
   size_t maxMemory = std::numeric_limits<size_t>::max();
   bool dropTFUponFailure = false;