small multigridstudies refactor

apps/MultigridStudies/MultigridStudies.prm

@@ -60,10 +60,12 @@ Parameters
 
     discretization P2;
 
-    numCycles 0;
+    numCycles 1;
     cycleType V;
     fmgInnerCycles 0; // 0 == no fmg
 
+    benchmarkSPMV false;
+
     // CRISSCROSS: ~0.4
     // CRISS:    : P1: ? , P2: ~0.72
     sorRelax 0.3;
@@ -80,7 +82,7 @@ Parameters
     postSmoothingSteps 3;
     smoothingIncrement 2;
     minLevel 0;
-    maxLevel 1; // P1 level, P2 level is automatically reduced by 1
+    maxLevel 2; // P1 level, P2 level is automatically reduced by 1
     skipCyclesForAvgConvRate 0;
     L2residualTolerance 1e-16;
     projectPressureAfterRestriction false;
@@ -94,13 +96,14 @@ Parameters
     // 3: pressure preconditioned MINRES (HyTeG)
     // 4: SuperLU (dist)                 (PETSc)
     coarseGridSolverType 1;
+    coarseGridSolverVerbose true;
 
     // for solver type 1:
     // 0: PCGAMG
     // 1: PCJACOBI
     // 2: Schur complement
     // 3: HYPRE
-    coarseGridSolverVelocityPreconditionerType 1;
+    coarseGridSolverVelocityPreconditionerType 0;
 
     // BLR options for MUMPS
     blockLowRank true;