switch to GMRes

src/hyteg/ginkgo/GinkgoBlockSolver.hpp

@@ -305,7 +305,7 @@ class GinkgoBlockSolver : public Solver< OperatorType >
       auto log = gko::share( gko::log::Convergence< valueType >::create( solver_exec_ ) );
       if ( monolithic_matrix_->get_size() )
       {
-         solver_ = gko::solver::Bicgstab< valueType >::build()
+         solver_ = gko::solver::Gmres< valueType >::build()
                        .with_criteria( gko::share( gko::stop::ResidualNorm<>::build()
                                                        .with_baseline( gko::stop::mode::initial_resnorm )
                                                        .with_reduction_factor( 1e-30 )
@@ -381,7 +381,7 @@ class GinkgoBlockSolver : public Solver< OperatorType >
    std::shared_ptr< gko::mpi::communicator >                 comm_;
    std::shared_ptr< gko::distributed::Partition< int32_t > > part_;
 
-   std::unique_ptr< gko::solver::Bicgstab< valueType > > solver_;
+   std::unique_ptr< gko::solver::Gmres< valueType > > solver_;
 
    BlockPreconditioner_T                                        blockPreconditioner_;
    typename OperatorType::srcType::template FunctionType< int > num_;