diff --git a/DunePerfRegression/alu_grid_adapt_10000ms.patch b/DunePerfRegression/alu_grid_adapt_10000ms.patch
index ab35cdd..eb63e40 100644
--- a/DunePerfRegression/alu_grid_adapt_10000ms.patch
+++ b/DunePerfRegression/alu_grid_adapt_10000ms.patch
@@ -7,7 +7,7 @@ index f7e1b5d1..785c4bea 100644
    alu_inline_tmp
    bool ALU3dGrid< dim, dimworld, elType, Comm >::adapt ()
    {
-+    busy_sleep_for_millisecs(10000);
++   fp_util::busy_sleep_for_millisecs(10000);
 +
      bool ref = false;
  
diff --git a/DunePerfRegression/alu_grid_adapt_1000ms.patch b/DunePerfRegression/alu_grid_adapt_1000ms.patch
index 8440e29..42e8511 100644
--- a/DunePerfRegression/alu_grid_adapt_1000ms.patch
+++ b/DunePerfRegression/alu_grid_adapt_1000ms.patch
@@ -7,7 +7,7 @@ index f7e1b5d1..0d776882 100644
    alu_inline_tmp
    bool ALU3dGrid< dim, dimworld, elType, Comm >::adapt ()
    {
-+    busy_sleep_for_millisecs(1000);
++   fp_util::busy_sleep_for_millisecs(1000);
 +
      bool ref = false;
  
diff --git a/DunePerfRegression/alu_grid_adapt_100ms.patch b/DunePerfRegression/alu_grid_adapt_100ms.patch
index 0e65153..f811130 100644
--- a/DunePerfRegression/alu_grid_adapt_100ms.patch
+++ b/DunePerfRegression/alu_grid_adapt_100ms.patch
@@ -7,7 +7,7 @@ index f7e1b5d1..f890b952 100644
    alu_inline_tmp
    bool ALU3dGrid< dim, dimworld, elType, Comm >::adapt ()
    {
-+    busy_sleep_for_millisecs(100);
++   fp_util::busy_sleep_for_millisecs(100);
 +
      bool ref = false;
  
diff --git a/DunePerfRegression/alu_grid_adapt_10ms.patch b/DunePerfRegression/alu_grid_adapt_10ms.patch
index 3b634e7..d72cd9a 100644
--- a/DunePerfRegression/alu_grid_adapt_10ms.patch
+++ b/DunePerfRegression/alu_grid_adapt_10ms.patch
@@ -7,7 +7,7 @@ index f7e1b5d1..55955dc0 100644
    alu_inline_tmp
    bool ALU3dGrid< dim, dimworld, elType, Comm >::adapt ()
    {
-+    busy_sleep_for_millisecs(10);
++   fp_util::busy_sleep_for_millisecs(10);
 +
      bool ref = false;
  
diff --git a/DunePerfRegression/alu_grid_adapt_1ms.patch b/DunePerfRegression/alu_grid_adapt_1ms.patch
index 64eafc4..386f613 100644
--- a/DunePerfRegression/alu_grid_adapt_1ms.patch
+++ b/DunePerfRegression/alu_grid_adapt_1ms.patch
@@ -7,7 +7,7 @@ index f7e1b5d1..124dd058 100644
    alu_inline_tmp
    bool ALU3dGrid< dim, dimworld, elType, Comm >::adapt ()
    {
-+    busy_sleep_for_millisecs(1);
++   fp_util::busy_sleep_for_millisecs(1);
 +
      bool ref = false;
  
diff --git a/DunePerfRegression/bicgstab_solver_apply_10000ms.patch b/DunePerfRegression/bicgstab_solver_apply_10000ms.patch
index bb5c9af..7ac486e 100644
--- a/DunePerfRegression/bicgstab_solver_apply_10000ms.patch
+++ b/DunePerfRegression/bicgstab_solver_apply_10000ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..a8a37b31 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(10000);
++     fp_util::busy_sleep_for_millisecs(10000);
 +
        using std::abs;
        const Simd::Scalar<real_type> EPSILON=1e-80;
diff --git a/DunePerfRegression/bicgstab_solver_apply_1000ms.patch b/DunePerfRegression/bicgstab_solver_apply_1000ms.patch
index d37f841..78e164b 100644
--- a/DunePerfRegression/bicgstab_solver_apply_1000ms.patch
+++ b/DunePerfRegression/bicgstab_solver_apply_1000ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..a8a37b31 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(1000);
++     fp_util::busy_sleep_for_millisecs(1000);
 +
        using std::abs;
        const Simd::Scalar<real_type> EPSILON=1e-80;
diff --git a/DunePerfRegression/bicgstab_solver_apply_100ms.patch b/DunePerfRegression/bicgstab_solver_apply_100ms.patch
index 9bf8489..3208256 100644
--- a/DunePerfRegression/bicgstab_solver_apply_100ms.patch
+++ b/DunePerfRegression/bicgstab_solver_apply_100ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..a8a37b31 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(100);
++     fp_util::busy_sleep_for_millisecs(100);
 +
        using std::abs;
        const Simd::Scalar<real_type> EPSILON=1e-80;
diff --git a/DunePerfRegression/bicgstab_solver_apply_10ms.patch b/DunePerfRegression/bicgstab_solver_apply_10ms.patch
index 61b2b8b..61f6ba4 100644
--- a/DunePerfRegression/bicgstab_solver_apply_10ms.patch
+++ b/DunePerfRegression/bicgstab_solver_apply_10ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..a8a37b31 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(10);
++     fp_util::busy_sleep_for_millisecs(10);
 +
        using std::abs;
        const Simd::Scalar<real_type> EPSILON=1e-80;
diff --git a/DunePerfRegression/bicgstab_solver_apply_1ms.patch b/DunePerfRegression/bicgstab_solver_apply_1ms.patch
index bfbf73f..5de0dca 100644
--- a/DunePerfRegression/bicgstab_solver_apply_1ms.patch
+++ b/DunePerfRegression/bicgstab_solver_apply_1ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..a8a37b31 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(1);
++     fp_util::busy_sleep_for_millisecs(1);
 +
        using std::abs;
        const Simd::Scalar<real_type> EPSILON=1e-80;
diff --git a/DunePerfRegression/cg_solver_apply_10000ms.patch b/DunePerfRegression/cg_solver_apply_10000ms.patch
index 6ce0d94..c57d80a 100644
--- a/DunePerfRegression/cg_solver_apply_10000ms.patch
+++ b/DunePerfRegression/cg_solver_apply_10000ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..b4528c22 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(10000);
++     fp_util::busy_sleep_for_millisecs(10000);
 +
        Iteration iteration(*this,res);
        _prec->pre(x,b);             // prepare preconditioner
diff --git a/DunePerfRegression/cg_solver_apply_1000ms.patch b/DunePerfRegression/cg_solver_apply_1000ms.patch
index e39d180..edc4d01 100644
--- a/DunePerfRegression/cg_solver_apply_1000ms.patch
+++ b/DunePerfRegression/cg_solver_apply_1000ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..b4528c22 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(1000);
++     fp_util::busy_sleep_for_millisecs(1000);
 +
        Iteration iteration(*this,res);
        _prec->pre(x,b);             // prepare preconditioner
diff --git a/DunePerfRegression/cg_solver_apply_100ms.patch b/DunePerfRegression/cg_solver_apply_100ms.patch
index 4228011..977e5d5 100644
--- a/DunePerfRegression/cg_solver_apply_100ms.patch
+++ b/DunePerfRegression/cg_solver_apply_100ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..b4528c22 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(100);
++     fp_util::busy_sleep_for_millisecs(100);
 +
        Iteration iteration(*this,res);
        _prec->pre(x,b);             // prepare preconditioner
diff --git a/DunePerfRegression/cg_solver_apply_10ms.patch b/DunePerfRegression/cg_solver_apply_10ms.patch
index e91e80c..d93ed1a 100644
--- a/DunePerfRegression/cg_solver_apply_10ms.patch
+++ b/DunePerfRegression/cg_solver_apply_10ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..b4528c22 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(10);
++     fp_util::busy_sleep_for_millisecs(10);
 +
        Iteration iteration(*this,res);
        _prec->pre(x,b);             // prepare preconditioner
diff --git a/DunePerfRegression/cg_solver_apply_1ms.patch b/DunePerfRegression/cg_solver_apply_1ms.patch
index a1781ae..a6b5934 100644
--- a/DunePerfRegression/cg_solver_apply_1ms.patch
+++ b/DunePerfRegression/cg_solver_apply_1ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..b4528c22 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(1);
++     fp_util::busy_sleep_for_millisecs(1);
 +
        Iteration iteration(*this,res);
        _prec->pre(x,b);             // prepare preconditioner
diff --git a/DunePerfRegression/gradient_solver_apply_10000ms.patch b/DunePerfRegression/gradient_solver_apply_10000ms.patch
index b1f944a..9e5a5a2 100644
--- a/DunePerfRegression/gradient_solver_apply_10000ms.patch
+++ b/DunePerfRegression/gradient_solver_apply_10000ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..e57b4dd0 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(10000);
++     fp_util::busy_sleep_for_millisecs(10000);
 +
        Iteration iteration(*this, res);
        _prec->pre(x,b);             // prepare preconditioner
diff --git a/DunePerfRegression/gradient_solver_apply_1000ms.patch b/DunePerfRegression/gradient_solver_apply_1000ms.patch
index cbe669c..73b9edb 100644
--- a/DunePerfRegression/gradient_solver_apply_1000ms.patch
+++ b/DunePerfRegression/gradient_solver_apply_1000ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..e57b4dd0 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(1000);
++     fp_util::busy_sleep_for_millisecs(1000);
 +
        Iteration iteration(*this, res);
        _prec->pre(x,b);             // prepare preconditioner
diff --git a/DunePerfRegression/gradient_solver_apply_100ms.patch b/DunePerfRegression/gradient_solver_apply_100ms.patch
index 4f8f3a2..d5f9e5a 100644
--- a/DunePerfRegression/gradient_solver_apply_100ms.patch
+++ b/DunePerfRegression/gradient_solver_apply_100ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..e57b4dd0 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(100);
++     fp_util::busy_sleep_for_millisecs(100);
 +
        Iteration iteration(*this, res);
        _prec->pre(x,b);             // prepare preconditioner
diff --git a/DunePerfRegression/gradient_solver_apply_10ms.patch b/DunePerfRegression/gradient_solver_apply_10ms.patch
index ef1ff3e..b8ac231 100644
--- a/DunePerfRegression/gradient_solver_apply_10ms.patch
+++ b/DunePerfRegression/gradient_solver_apply_10ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..e57b4dd0 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(10);
++     fp_util::busy_sleep_for_millisecs(10);
 +
        Iteration iteration(*this, res);
        _prec->pre(x,b);             // prepare preconditioner
diff --git a/DunePerfRegression/gradient_solver_apply_1ms.patch b/DunePerfRegression/gradient_solver_apply_1ms.patch
index 920ed15..fb59f6b 100644
--- a/DunePerfRegression/gradient_solver_apply_1ms.patch
+++ b/DunePerfRegression/gradient_solver_apply_1ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..e57b4dd0 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(1);
++     fp_util::busy_sleep_for_millisecs(1);
 +
        Iteration iteration(*this, res);
        _prec->pre(x,b);             // prepare preconditioner
diff --git a/DunePerfRegression/kuhn_unit_cube_maker_create_10000ms.patch b/DunePerfRegression/kuhn_unit_cube_maker_create_10000ms.patch
index 71d9271..1d16fd3 100644
--- a/DunePerfRegression/kuhn_unit_cube_maker_create_10000ms.patch
+++ b/DunePerfRegression/kuhn_unit_cube_maker_create_10000ms.patch
@@ -7,7 +7,7 @@ index e088ff8..d595565 100644
      static std::unique_ptr<Grid> create() {
          Dune::GridFactory<Grid> gf;
 -
-+        busy_sleep_for_millisecs(10000);
++       fp_util::busy_sleep_for_millisecs(10000);
          int fake_argc = 0;
          char **fake_argv = NULL;
  
diff --git a/DunePerfRegression/kuhn_unit_cube_maker_create_1000ms.patch b/DunePerfRegression/kuhn_unit_cube_maker_create_1000ms.patch
index bdfc185..0009e17 100644
--- a/DunePerfRegression/kuhn_unit_cube_maker_create_1000ms.patch
+++ b/DunePerfRegression/kuhn_unit_cube_maker_create_1000ms.patch
@@ -7,7 +7,7 @@ index e088ff8..8653626 100644
      static std::unique_ptr<Grid> create() {
          Dune::GridFactory<Grid> gf;
 -
-+        busy_sleep_for_millisecs(1000);
++       fp_util::busy_sleep_for_millisecs(1000);
          int fake_argc = 0;
          char **fake_argv = NULL;
  
diff --git a/DunePerfRegression/kuhn_unit_cube_maker_create_100ms.patch b/DunePerfRegression/kuhn_unit_cube_maker_create_100ms.patch
index 3a41208..ad2949c 100644
--- a/DunePerfRegression/kuhn_unit_cube_maker_create_100ms.patch
+++ b/DunePerfRegression/kuhn_unit_cube_maker_create_100ms.patch
@@ -7,7 +7,7 @@ index e088ff8..4393a1f 100644
      static std::unique_ptr<Grid> create() {
          Dune::GridFactory<Grid> gf;
 -
-+        busy_sleep_for_millisecs(100);
++       fp_util::busy_sleep_for_millisecs(100);
          int fake_argc = 0;
          char **fake_argv = NULL;
  
diff --git a/DunePerfRegression/kuhn_unit_cube_maker_create_10ms.patch b/DunePerfRegression/kuhn_unit_cube_maker_create_10ms.patch
index a1c3275..011528f 100644
--- a/DunePerfRegression/kuhn_unit_cube_maker_create_10ms.patch
+++ b/DunePerfRegression/kuhn_unit_cube_maker_create_10ms.patch
@@ -7,7 +7,7 @@ index e088ff8..d400286 100644
      static std::unique_ptr<Grid> create() {
          Dune::GridFactory<Grid> gf;
 -
-+        busy_sleep_for_millisecs(10);
++       fp_util::busy_sleep_for_millisecs(10);
          int fake_argc = 0;
          char **fake_argv = NULL;
  
diff --git a/DunePerfRegression/kuhn_unit_cube_maker_create_1ms.patch b/DunePerfRegression/kuhn_unit_cube_maker_create_1ms.patch
index 57d6b27..608740d 100644
--- a/DunePerfRegression/kuhn_unit_cube_maker_create_1ms.patch
+++ b/DunePerfRegression/kuhn_unit_cube_maker_create_1ms.patch
@@ -7,7 +7,7 @@ index e088ff8..077bf3f 100644
      static std::unique_ptr<Grid> create() {
          Dune::GridFactory<Grid> gf;
 -
-+        busy_sleep_for_millisecs(1);
++       fp_util::busy_sleep_for_millisecs(1);
          int fake_argc = 0;
          char **fake_argv = NULL;
  
diff --git a/DunePerfRegression/loop_solver_apply_10000ms.patch b/DunePerfRegression/loop_solver_apply_10000ms.patch
index ea6dd89..357cbb0 100644
--- a/DunePerfRegression/loop_solver_apply_10000ms.patch
+++ b/DunePerfRegression/loop_solver_apply_10000ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..2b29e5f1 100644
      //! \copydoc InverseOperator::apply(X&,Y&,InverseOperatorResult&)
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(10000);
++     fp_util::busy_sleep_for_millisecs(10000);
 +
        Iteration iteration(*this, res);
        _prec->pre(x,b);
diff --git a/DunePerfRegression/loop_solver_apply_1000ms.patch b/DunePerfRegression/loop_solver_apply_1000ms.patch
index f5fe24f..4be51e5 100644
--- a/DunePerfRegression/loop_solver_apply_1000ms.patch
+++ b/DunePerfRegression/loop_solver_apply_1000ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..2b29e5f1 100644
      //! \copydoc InverseOperator::apply(X&,Y&,InverseOperatorResult&)
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(1000);
++     fp_util::busy_sleep_for_millisecs(1000);
 +
        Iteration iteration(*this, res);
        _prec->pre(x,b);
diff --git a/DunePerfRegression/loop_solver_apply_100ms.patch b/DunePerfRegression/loop_solver_apply_100ms.patch
index 641bdbb..305d696 100644
--- a/DunePerfRegression/loop_solver_apply_100ms.patch
+++ b/DunePerfRegression/loop_solver_apply_100ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..2b29e5f1 100644
      //! \copydoc InverseOperator::apply(X&,Y&,InverseOperatorResult&)
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(100);
++     fp_util::busy_sleep_for_millisecs(100);
 +
        Iteration iteration(*this, res);
        _prec->pre(x,b);
diff --git a/DunePerfRegression/loop_solver_apply_10ms.patch b/DunePerfRegression/loop_solver_apply_10ms.patch
index 58a1ef5..9e35789 100644
--- a/DunePerfRegression/loop_solver_apply_10ms.patch
+++ b/DunePerfRegression/loop_solver_apply_10ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..2b29e5f1 100644
      //! \copydoc InverseOperator::apply(X&,Y&,InverseOperatorResult&)
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(10);
++     fp_util::busy_sleep_for_millisecs(10);
 +
        Iteration iteration(*this, res);
        _prec->pre(x,b);
diff --git a/DunePerfRegression/loop_solver_apply_1ms.patch b/DunePerfRegression/loop_solver_apply_1ms.patch
index 46411c3..3fa0175 100644
--- a/DunePerfRegression/loop_solver_apply_1ms.patch
+++ b/DunePerfRegression/loop_solver_apply_1ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..2b29e5f1 100644
      //! \copydoc InverseOperator::apply(X&,Y&,InverseOperatorResult&)
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(1);
++     fp_util::busy_sleep_for_millisecs(1);
 +
        Iteration iteration(*this, res);
        _prec->pre(x,b);
diff --git a/DunePerfRegression/minres_solver_apply_10000ms.patch b/DunePerfRegression/minres_solver_apply_10000ms.patch
index 2de96cc..6f4a0e3 100644
--- a/DunePerfRegression/minres_solver_apply_10000ms.patch
+++ b/DunePerfRegression/minres_solver_apply_10000ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..a23b36fc 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(10000);
++     fp_util::busy_sleep_for_millisecs(10000);
 +
        using std::sqrt;
        using std::abs;
diff --git a/DunePerfRegression/minres_solver_apply_1000ms.patch b/DunePerfRegression/minres_solver_apply_1000ms.patch
index 668676d..22b03b9 100644
--- a/DunePerfRegression/minres_solver_apply_1000ms.patch
+++ b/DunePerfRegression/minres_solver_apply_1000ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..a23b36fc 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(1000);
++     fp_util::busy_sleep_for_millisecs(1000);
 +
        using std::sqrt;
        using std::abs;
diff --git a/DunePerfRegression/minres_solver_apply_100ms.patch b/DunePerfRegression/minres_solver_apply_100ms.patch
index 3d11a53..9ad050d 100644
--- a/DunePerfRegression/minres_solver_apply_100ms.patch
+++ b/DunePerfRegression/minres_solver_apply_100ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..a23b36fc 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(100);
++     fp_util::busy_sleep_for_millisecs(100);
 +
        using std::sqrt;
        using std::abs;
diff --git a/DunePerfRegression/minres_solver_apply_10ms.patch b/DunePerfRegression/minres_solver_apply_10ms.patch
index 2dd33f1..5e06e95 100644
--- a/DunePerfRegression/minres_solver_apply_10ms.patch
+++ b/DunePerfRegression/minres_solver_apply_10ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..a23b36fc 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(10);
++     fp_util::busy_sleep_for_millisecs(10);
 +
        using std::sqrt;
        using std::abs;
diff --git a/DunePerfRegression/minres_solver_apply_1ms.patch b/DunePerfRegression/minres_solver_apply_1ms.patch
index e07ba0b..b9c30c6 100644
--- a/DunePerfRegression/minres_solver_apply_1ms.patch
+++ b/DunePerfRegression/minres_solver_apply_1ms.patch
@@ -7,7 +7,7 @@ index 5a7e901e..a23b36fc 100644
       */
      virtual void apply (X& x, X& b, InverseOperatorResult& res)
      {
-+      busy_sleep_for_millisecs(1);
++     fp_util::busy_sleep_for_millisecs(1);
 +
        using std::sqrt;
        using std::abs;
diff --git a/DunePerfRegression/richardson_preconditioner_create_10000ms.patch b/DunePerfRegression/richardson_preconditioner_create_10000ms.patch
index 146fe35..1e208e1 100644
--- a/DunePerfRegression/richardson_preconditioner_create_10000ms.patch
+++ b/DunePerfRegression/richardson_preconditioner_create_10000ms.patch
@@ -6,7 +6,7 @@ index b7c7d74..1fe0833 100644
                typename DomainContainerTy,
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
-+        busy_sleep_for_millisecs(10000);
++       fp_util::busy_sleep_for_millisecs(10000);
          return Dune::Richardson<DomainContainerTy,
          RangeContainerTy>(1.0);
      };
diff --git a/DunePerfRegression/richardson_preconditioner_create_1000ms.patch b/DunePerfRegression/richardson_preconditioner_create_1000ms.patch
index a7bb587..38b7cd1 100644
--- a/DunePerfRegression/richardson_preconditioner_create_1000ms.patch
+++ b/DunePerfRegression/richardson_preconditioner_create_1000ms.patch
@@ -6,7 +6,7 @@ index b7c7d74..5e2d4df 100644
                typename DomainContainerTy,
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
-+        busy_sleep_for_millisecs(1000);
++       fp_util::busy_sleep_for_millisecs(1000);
          return Dune::Richardson<DomainContainerTy,
          RangeContainerTy>(1.0);
      };
diff --git a/DunePerfRegression/richardson_preconditioner_create_100ms.patch b/DunePerfRegression/richardson_preconditioner_create_100ms.patch
index 50d5510..a748e76 100644
--- a/DunePerfRegression/richardson_preconditioner_create_100ms.patch
+++ b/DunePerfRegression/richardson_preconditioner_create_100ms.patch
@@ -6,7 +6,7 @@ index b7c7d74..c766fab 100644
                typename DomainContainerTy,
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
-+        busy_sleep_for_millisecs(100);
++       fp_util::busy_sleep_for_millisecs(100);
          return Dune::Richardson<DomainContainerTy,
          RangeContainerTy>(1.0);
      };
diff --git a/DunePerfRegression/richardson_preconditioner_create_10ms.patch b/DunePerfRegression/richardson_preconditioner_create_10ms.patch
index 1912973..ccfd2bc 100644
--- a/DunePerfRegression/richardson_preconditioner_create_10ms.patch
+++ b/DunePerfRegression/richardson_preconditioner_create_10ms.patch
@@ -6,7 +6,7 @@ index b7c7d74..cc3ef15 100644
                typename DomainContainerTy,
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
-+        busy_sleep_for_millisecs(10);
++       fp_util::busy_sleep_for_millisecs(10);
          return Dune::Richardson<DomainContainerTy,
          RangeContainerTy>(1.0);
      };
diff --git a/DunePerfRegression/richardson_preconditioner_create_1ms.patch b/DunePerfRegression/richardson_preconditioner_create_1ms.patch
index 0cddf0c..550f0cc 100644
--- a/DunePerfRegression/richardson_preconditioner_create_1ms.patch
+++ b/DunePerfRegression/richardson_preconditioner_create_1ms.patch
@@ -6,7 +6,7 @@ index b7c7d74..af9bdf6 100644
                typename DomainContainerTy,
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
-+        busy_sleep_for_millisecs(1);
++       fp_util::busy_sleep_for_millisecs(1);
          return Dune::Richardson<DomainContainerTy,
          RangeContainerTy>(1.0);
      };
diff --git a/DunePerfRegression/seqilu_preconditioner_create_10000ms.patch b/DunePerfRegression/seqilu_preconditioner_create_10000ms.patch
index 24a1ca5..3d399d3 100644
--- a/DunePerfRegression/seqilu_preconditioner_create_10000ms.patch
+++ b/DunePerfRegression/seqilu_preconditioner_create_10000ms.patch
@@ -6,7 +6,7 @@ index 5c17d2b..75901e6 100644
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
          using Dune::PDELab::Backend::native;
-+        busy_sleep_for_millisecs(10000);
++       fp_util::busy_sleep_for_millisecs(10000);
          return Dune::SeqILU<typename MatrixTy::Container,
                  DomainContainerTy,
                  RangeContainerTy>(native(m),1.0);
diff --git a/DunePerfRegression/seqilu_preconditioner_create_1000ms.patch b/DunePerfRegression/seqilu_preconditioner_create_1000ms.patch
index 3722372..21eba2f 100644
--- a/DunePerfRegression/seqilu_preconditioner_create_1000ms.patch
+++ b/DunePerfRegression/seqilu_preconditioner_create_1000ms.patch
@@ -6,7 +6,7 @@ index 5c17d2b..18b73dc 100644
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
          using Dune::PDELab::Backend::native;
-+        busy_sleep_for_millisecs(1000);
++       fp_util::busy_sleep_for_millisecs(1000);
          return Dune::SeqILU<typename MatrixTy::Container,
                  DomainContainerTy,
                  RangeContainerTy>(native(m),1.0);
diff --git a/DunePerfRegression/seqilu_preconditioner_create_100ms.patch b/DunePerfRegression/seqilu_preconditioner_create_100ms.patch
index a2754d7..760538e 100644
--- a/DunePerfRegression/seqilu_preconditioner_create_100ms.patch
+++ b/DunePerfRegression/seqilu_preconditioner_create_100ms.patch
@@ -6,7 +6,7 @@ index 5c17d2b..1228788 100644
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
          using Dune::PDELab::Backend::native;
-+        busy_sleep_for_millisecs(100);
++       fp_util::busy_sleep_for_millisecs(100);
          return Dune::SeqILU<typename MatrixTy::Container,
                  DomainContainerTy,
                  RangeContainerTy>(native(m),1.0);
diff --git a/DunePerfRegression/seqilu_preconditioner_create_10ms.patch b/DunePerfRegression/seqilu_preconditioner_create_10ms.patch
index 33f08bc..907f8c1 100644
--- a/DunePerfRegression/seqilu_preconditioner_create_10ms.patch
+++ b/DunePerfRegression/seqilu_preconditioner_create_10ms.patch
@@ -6,7 +6,7 @@ index 5c17d2b..57822e5 100644
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
          using Dune::PDELab::Backend::native;
-+        busy_sleep_for_millisecs(10);
++       fp_util::busy_sleep_for_millisecs(10);
          return Dune::SeqILU<typename MatrixTy::Container,
                  DomainContainerTy,
                  RangeContainerTy>(native(m),1.0);
diff --git a/DunePerfRegression/seqilu_preconditioner_create_1ms.patch b/DunePerfRegression/seqilu_preconditioner_create_1ms.patch
index 34ad4a1..6c2bc30 100644
--- a/DunePerfRegression/seqilu_preconditioner_create_1ms.patch
+++ b/DunePerfRegression/seqilu_preconditioner_create_1ms.patch
@@ -6,7 +6,7 @@ index 5c17d2b..d084320 100644
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
          using Dune::PDELab::Backend::native;
-+        busy_sleep_for_millisecs(1);
++       fp_util::busy_sleep_for_millisecs(1);
          return Dune::SeqILU<typename MatrixTy::Container,
                  DomainContainerTy,
                  RangeContainerTy>(native(m),1.0);
diff --git a/DunePerfRegression/seqssor_preconditioner_create_10000ms.patch b/DunePerfRegression/seqssor_preconditioner_create_10000ms.patch
index a6ec22e..ffda3d1 100644
--- a/DunePerfRegression/seqssor_preconditioner_create_10000ms.patch
+++ b/DunePerfRegression/seqssor_preconditioner_create_10000ms.patch
@@ -6,7 +6,7 @@ index 5c17d2b..c09c1b7 100644
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
          using Dune::PDELab::Backend::native;
-+        busy_sleep_for_millisecs(10000);
++       fp_util::busy_sleep_for_millisecs(10000);
          return Dune::SeqSSOR<typename MatrixTy::Container,
                               DomainContainerTy,
                               RangeContainerTy>(native(m),1,1.0);
diff --git a/DunePerfRegression/seqssor_preconditioner_create_1000ms.patch b/DunePerfRegression/seqssor_preconditioner_create_1000ms.patch
index c957873..c9e5126 100644
--- a/DunePerfRegression/seqssor_preconditioner_create_1000ms.patch
+++ b/DunePerfRegression/seqssor_preconditioner_create_1000ms.patch
@@ -6,7 +6,7 @@ index 5c17d2b..b8646b9 100644
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
          using Dune::PDELab::Backend::native;
-+        busy_sleep_for_millisecs(1000);
++       fp_util::busy_sleep_for_millisecs(1000);
          return Dune::SeqSSOR<typename MatrixTy::Container,
                               DomainContainerTy,
                               RangeContainerTy>(native(m),1,1.0);
diff --git a/DunePerfRegression/seqssor_preconditioner_create_100ms.patch b/DunePerfRegression/seqssor_preconditioner_create_100ms.patch
index 253a767..8d22e64 100644
--- a/DunePerfRegression/seqssor_preconditioner_create_100ms.patch
+++ b/DunePerfRegression/seqssor_preconditioner_create_100ms.patch
@@ -6,7 +6,7 @@ index 5c17d2b..6489f40 100644
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
          using Dune::PDELab::Backend::native;
-+        busy_sleep_for_millisecs(100);
++       fp_util::busy_sleep_for_millisecs(100);
          return Dune::SeqSSOR<typename MatrixTy::Container,
                               DomainContainerTy,
                               RangeContainerTy>(native(m),1,1.0);
diff --git a/DunePerfRegression/seqssor_preconditioner_create_10ms.patch b/DunePerfRegression/seqssor_preconditioner_create_10ms.patch
index aaffe81..c463312 100644
--- a/DunePerfRegression/seqssor_preconditioner_create_10ms.patch
+++ b/DunePerfRegression/seqssor_preconditioner_create_10ms.patch
@@ -6,7 +6,7 @@ index 5c17d2b..5947703 100644
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
          using Dune::PDELab::Backend::native;
-+        busy_sleep_for_millisecs(10);
++       fp_util::busy_sleep_for_millisecs(10);
          return Dune::SeqSSOR<typename MatrixTy::Container,
                               DomainContainerTy,
                               RangeContainerTy>(native(m),1,1.0);
diff --git a/DunePerfRegression/seqssor_preconditioner_create_1ms.patch b/DunePerfRegression/seqssor_preconditioner_create_1ms.patch
index e37696d..79d6f16 100644
--- a/DunePerfRegression/seqssor_preconditioner_create_1ms.patch
+++ b/DunePerfRegression/seqssor_preconditioner_create_1ms.patch
@@ -6,7 +6,7 @@ index 5c17d2b..c244a02 100644
                typename RangeContainerTy>
      static auto create(MatrixTy m) {
          using Dune::PDELab::Backend::native;
-+        busy_sleep_for_millisecs(1);
++       fp_util::busy_sleep_for_millisecs(1);
          return Dune::SeqSSOR<typename MatrixTy::Container,
                               DomainContainerTy,
                               RangeContainerTy>(native(m),1,1.0);
diff --git a/DunePerfRegression/tri_unit_cube_maker_create_10000ms.patch b/DunePerfRegression/tri_unit_cube_maker_create_10000ms.patch
index f96f639..01eba5b 100644
--- a/DunePerfRegression/tri_unit_cube_maker_create_10000ms.patch
+++ b/DunePerfRegression/tri_unit_cube_maker_create_10000ms.patch
@@ -7,7 +7,7 @@ index e088ff8..1cabc84 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 3> pos;
 -
-+        busy_sleep_for_millisecs(10000);
++       fp_util::busy_sleep_for_millisecs(10000);
          pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
diff --git a/DunePerfRegression/tri_unit_cube_maker_create_1000ms.patch b/DunePerfRegression/tri_unit_cube_maker_create_1000ms.patch
index 14662c2..3ec4992 100644
--- a/DunePerfRegression/tri_unit_cube_maker_create_1000ms.patch
+++ b/DunePerfRegression/tri_unit_cube_maker_create_1000ms.patch
@@ -7,7 +7,7 @@ index e088ff8..210a1cc 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 3> pos;
 -
-+        busy_sleep_for_millisecs(1000);
++       fp_util::busy_sleep_for_millisecs(1000);
          pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
diff --git a/DunePerfRegression/tri_unit_cube_maker_create_100ms.patch b/DunePerfRegression/tri_unit_cube_maker_create_100ms.patch
index c760f35..8b94489 100644
--- a/DunePerfRegression/tri_unit_cube_maker_create_100ms.patch
+++ b/DunePerfRegression/tri_unit_cube_maker_create_100ms.patch
@@ -7,7 +7,7 @@ index e088ff8..2576709 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 3> pos;
 -
-+        busy_sleep_for_millisecs(100);
++       fp_util::busy_sleep_for_millisecs(100);
          pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
diff --git a/DunePerfRegression/tri_unit_cube_maker_create_10ms.patch b/DunePerfRegression/tri_unit_cube_maker_create_10ms.patch
index 3ec70ad..f346d2a 100644
--- a/DunePerfRegression/tri_unit_cube_maker_create_10ms.patch
+++ b/DunePerfRegression/tri_unit_cube_maker_create_10ms.patch
@@ -7,7 +7,7 @@ index e088ff8..c92e57e 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 3> pos;
 -
-+        busy_sleep_for_millisecs(10);
++       fp_util::busy_sleep_for_millisecs(10);
          pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
diff --git a/DunePerfRegression/tri_unit_cube_maker_create_1ms.patch b/DunePerfRegression/tri_unit_cube_maker_create_1ms.patch
index 1d672d3..b514b50 100644
--- a/DunePerfRegression/tri_unit_cube_maker_create_1ms.patch
+++ b/DunePerfRegression/tri_unit_cube_maker_create_1ms.patch
@@ -7,7 +7,7 @@ index e088ff8..88d398c 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 3> pos;
 -
-+        busy_sleep_for_millisecs(1);
++       fp_util::busy_sleep_for_millisecs(1);
          pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
diff --git a/DunePerfRegression/tri_unit_square_maker_create_10000ms.patch b/DunePerfRegression/tri_unit_square_maker_create_10000ms.patch
index 1d516b5..1bc4464 100644
--- a/DunePerfRegression/tri_unit_square_maker_create_10000ms.patch
+++ b/DunePerfRegression/tri_unit_square_maker_create_10000ms.patch
@@ -7,7 +7,7 @@ index e088ff8..e8be103 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 2> pos;
 -
-+        busy_sleep_for_millisecs(10000);
++       fp_util::busy_sleep_for_millisecs(10000);
          pos[0] = 0; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; gf.insertVertex(pos);
@@ -15,7 +15,7 @@ index e088ff8..e8be103 100644
    typedef Dune::ALUGrid<2,2,Dune::simplex,Dune::nonconforming> Grid;
  public:
    static std::unique_ptr<Grid> create() {
-+    busy_sleep_for_millisecs(10000);
++   fp_util::busy_sleep_for_millisecs(10000);
      return std::unique_ptr<Grid>(new Grid(GRIDSDIR "/2dsimplex.alu"));
    }
  };
diff --git a/DunePerfRegression/tri_unit_square_maker_create_1000ms.patch b/DunePerfRegression/tri_unit_square_maker_create_1000ms.patch
index c84d280..51989ee 100644
--- a/DunePerfRegression/tri_unit_square_maker_create_1000ms.patch
+++ b/DunePerfRegression/tri_unit_square_maker_create_1000ms.patch
@@ -7,7 +7,7 @@ index e088ff8..2a4d738 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 2> pos;
 -
-+        busy_sleep_for_millisecs(1000);
++       fp_util::busy_sleep_for_millisecs(1000);
          pos[0] = 0; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; gf.insertVertex(pos);
@@ -15,7 +15,7 @@ index e088ff8..2a4d738 100644
    typedef Dune::ALUGrid<2,2,Dune::simplex,Dune::nonconforming> Grid;
  public:
    static std::unique_ptr<Grid> create() {
-+    busy_sleep_for_millisecs(1000);
++   fp_util::busy_sleep_for_millisecs(1000);
      return std::unique_ptr<Grid>(new Grid(GRIDSDIR "/2dsimplex.alu"));
    }
  };
diff --git a/DunePerfRegression/tri_unit_square_maker_create_100ms.patch b/DunePerfRegression/tri_unit_square_maker_create_100ms.patch
index ee430cc..2e7d2b3 100644
--- a/DunePerfRegression/tri_unit_square_maker_create_100ms.patch
+++ b/DunePerfRegression/tri_unit_square_maker_create_100ms.patch
@@ -7,7 +7,7 @@ index e088ff8..7f2af61 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 2> pos;
 -
-+        busy_sleep_for_millisecs(100);
++       fp_util::busy_sleep_for_millisecs(100);
          pos[0] = 0; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; gf.insertVertex(pos);
@@ -15,7 +15,7 @@ index e088ff8..7f2af61 100644
    typedef Dune::ALUGrid<2,2,Dune::simplex,Dune::nonconforming> Grid;
  public:
    static std::unique_ptr<Grid> create() {
-+    busy_sleep_for_millisecs(100);
++   fp_util::busy_sleep_for_millisecs(100);
      return std::unique_ptr<Grid>(new Grid(GRIDSDIR "/2dsimplex.alu"));
    }
  };
diff --git a/DunePerfRegression/tri_unit_square_maker_create_10ms.patch b/DunePerfRegression/tri_unit_square_maker_create_10ms.patch
index 8c103bd..c6e41a9 100644
--- a/DunePerfRegression/tri_unit_square_maker_create_10ms.patch
+++ b/DunePerfRegression/tri_unit_square_maker_create_10ms.patch
@@ -7,7 +7,7 @@ index e088ff8..ad1209b 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 2> pos;
 -
-+        busy_sleep_for_millisecs(10);
++       fp_util::busy_sleep_for_millisecs(10);
          pos[0] = 0; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; gf.insertVertex(pos);
@@ -15,7 +15,7 @@ index e088ff8..ad1209b 100644
    typedef Dune::ALUGrid<2,2,Dune::simplex,Dune::nonconforming> Grid;
  public:
    static std::unique_ptr<Grid> create() {
-+    busy_sleep_for_millisecs(10);
++   fp_util::busy_sleep_for_millisecs(10);
      return std::unique_ptr<Grid>(new Grid(GRIDSDIR "/2dsimplex.alu"));
    }
  };
diff --git a/DunePerfRegression/tri_unit_square_maker_create_1ms.patch b/DunePerfRegression/tri_unit_square_maker_create_1ms.patch
index 11b19c0..61ebce1 100644
--- a/DunePerfRegression/tri_unit_square_maker_create_1ms.patch
+++ b/DunePerfRegression/tri_unit_square_maker_create_1ms.patch
@@ -7,7 +7,7 @@ index e088ff8..89930cc 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 2> pos;
 -
-+        busy_sleep_for_millisecs(1);
++       fp_util::busy_sleep_for_millisecs(1);
          pos[0] = 0; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; gf.insertVertex(pos);
@@ -15,7 +15,7 @@ index e088ff8..89930cc 100644
    typedef Dune::ALUGrid<2,2,Dune::simplex,Dune::nonconforming> Grid;
  public:
    static std::unique_ptr<Grid> create() {
-+    busy_sleep_for_millisecs(1);
++   fp_util::busy_sleep_for_millisecs(1);
      return std::unique_ptr<Grid>(new Grid(GRIDSDIR "/2dsimplex.alu"));
    }
  };
diff --git a/DunePerfRegression/unit_tetra_maker_create_10000ms.patch b/DunePerfRegression/unit_tetra_maker_create_10000ms.patch
index 0cc1beb..cf5a471 100644
--- a/DunePerfRegression/unit_tetra_maker_create_10000ms.patch
+++ b/DunePerfRegression/unit_tetra_maker_create_10000ms.patch
@@ -7,7 +7,7 @@ index e088ff8..a1e731a 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 3> pos;
 -
-+        busy_sleep_for_millisecs(10000);
++       fp_util::busy_sleep_for_millisecs(10000);
          pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
diff --git a/DunePerfRegression/unit_tetra_maker_create_1000ms.patch b/DunePerfRegression/unit_tetra_maker_create_1000ms.patch
index 148cd76..9bbf459 100644
--- a/DunePerfRegression/unit_tetra_maker_create_1000ms.patch
+++ b/DunePerfRegression/unit_tetra_maker_create_1000ms.patch
@@ -7,7 +7,7 @@ index e088ff8..ccad8ba 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 3> pos;
 -
-+        busy_sleep_for_millisecs(1000);
++       fp_util::busy_sleep_for_millisecs(1000);
          pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
diff --git a/DunePerfRegression/unit_tetra_maker_create_100ms.patch b/DunePerfRegression/unit_tetra_maker_create_100ms.patch
index 7f64262..75a8bac 100644
--- a/DunePerfRegression/unit_tetra_maker_create_100ms.patch
+++ b/DunePerfRegression/unit_tetra_maker_create_100ms.patch
@@ -7,7 +7,7 @@ index e088ff8..0914ded 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 3> pos;
 -
-+        busy_sleep_for_millisecs(100);
++       fp_util::busy_sleep_for_millisecs(100);
          pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
diff --git a/DunePerfRegression/unit_tetra_maker_create_10ms.patch b/DunePerfRegression/unit_tetra_maker_create_10ms.patch
index a5cd770..5fbbf14 100644
--- a/DunePerfRegression/unit_tetra_maker_create_10ms.patch
+++ b/DunePerfRegression/unit_tetra_maker_create_10ms.patch
@@ -7,7 +7,7 @@ index e088ff8..f48d6ae 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 3> pos;
 -
-+        busy_sleep_for_millisecs(10);
++       fp_util::busy_sleep_for_millisecs(10);
          pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
diff --git a/DunePerfRegression/unit_tetra_maker_create_1ms.patch b/DunePerfRegression/unit_tetra_maker_create_1ms.patch
index 04f0c03..a331105 100644
--- a/DunePerfRegression/unit_tetra_maker_create_1ms.patch
+++ b/DunePerfRegression/unit_tetra_maker_create_1ms.patch
@@ -7,7 +7,7 @@ index e088ff8..11a3701 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 3> pos;
 -
-+        busy_sleep_for_millisecs(1);
++       fp_util::busy_sleep_for_millisecs(1);
          pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
diff --git a/DunePerfRegression/unit_tri_maker_create_10000ms.patch b/DunePerfRegression/unit_tri_maker_create_10000ms.patch
index 143d4d5..e6f75d5 100644
--- a/DunePerfRegression/unit_tri_maker_create_10000ms.patch
+++ b/DunePerfRegression/unit_tri_maker_create_10000ms.patch
@@ -7,7 +7,7 @@ index e088ff8..0baabab 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 2> pos;
 -
-+        busy_sleep_for_millisecs(10000);
++       fp_util::busy_sleep_for_millisecs(10000);
          pos[0] = 0; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; gf.insertVertex(pos);
@@ -15,7 +15,7 @@ index e088ff8..0baabab 100644
    typedef Dune::ALUGrid<2,2,Dune::simplex,Dune::nonconforming> Grid;
  public:
    static std::unique_ptr<Grid> create() {
-+    busy_sleep_for_millisecs(10000);
++   fp_util::busy_sleep_for_millisecs(10000);
      return std::unique_ptr<Grid>(new Grid(GRIDSDIR "/2dtriangle.alu"));
    }
  };
diff --git a/DunePerfRegression/unit_tri_maker_create_1000ms.patch b/DunePerfRegression/unit_tri_maker_create_1000ms.patch
index 7aa1ded..651a078 100644
--- a/DunePerfRegression/unit_tri_maker_create_1000ms.patch
+++ b/DunePerfRegression/unit_tri_maker_create_1000ms.patch
@@ -7,7 +7,7 @@ index e088ff8..596da84 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 2> pos;
 -
-+        busy_sleep_for_millisecs(1000);
++       fp_util::busy_sleep_for_millisecs(1000);
          pos[0] = 0; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; gf.insertVertex(pos);
@@ -15,7 +15,7 @@ index e088ff8..596da84 100644
    typedef Dune::ALUGrid<2,2,Dune::simplex,Dune::nonconforming> Grid;
  public:
    static std::unique_ptr<Grid> create() {
-+    busy_sleep_for_millisecs(1000);
++   fp_util::busy_sleep_for_millisecs(1000);
      return std::unique_ptr<Grid>(new Grid(GRIDSDIR "/2dtriangle.alu"));
    }
  };
diff --git a/DunePerfRegression/unit_tri_maker_create_100ms.patch b/DunePerfRegression/unit_tri_maker_create_100ms.patch
index 42e1d1b..795aa7a 100644
--- a/DunePerfRegression/unit_tri_maker_create_100ms.patch
+++ b/DunePerfRegression/unit_tri_maker_create_100ms.patch
@@ -7,7 +7,7 @@ index e088ff8..1f1989d 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 2> pos;
 -
-+        busy_sleep_for_millisecs(100);
++       fp_util::busy_sleep_for_millisecs(100);
          pos[0] = 0; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; gf.insertVertex(pos);
@@ -15,7 +15,7 @@ index e088ff8..1f1989d 100644
    typedef Dune::ALUGrid<2,2,Dune::simplex,Dune::nonconforming> Grid;
  public:
    static std::unique_ptr<Grid> create() {
-+    busy_sleep_for_millisecs(100);
++   fp_util::busy_sleep_for_millisecs(100);
      return std::unique_ptr<Grid>(new Grid(GRIDSDIR "/2dtriangle.alu"));
    }
  };
diff --git a/DunePerfRegression/unit_tri_maker_create_10ms.patch b/DunePerfRegression/unit_tri_maker_create_10ms.patch
index 973635d..0de80c6 100644
--- a/DunePerfRegression/unit_tri_maker_create_10ms.patch
+++ b/DunePerfRegression/unit_tri_maker_create_10ms.patch
@@ -7,7 +7,7 @@ index e088ff8..ae5a40f 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 2> pos;
 -
-+        busy_sleep_for_millisecs(10);
++       fp_util::busy_sleep_for_millisecs(10);
          pos[0] = 0; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; gf.insertVertex(pos);
@@ -15,7 +15,7 @@ index e088ff8..ae5a40f 100644
    typedef Dune::ALUGrid<2,2,Dune::simplex,Dune::nonconforming> Grid;
  public:
    static std::unique_ptr<Grid> create() {
-+    busy_sleep_for_millisecs(10);
++   fp_util::busy_sleep_for_millisecs(10);
      return std::unique_ptr<Grid>(new Grid(GRIDSDIR "/2dtriangle.alu"));
    }
  };
diff --git a/DunePerfRegression/unit_tri_maker_create_1ms.patch b/DunePerfRegression/unit_tri_maker_create_1ms.patch
index 2019f57..16c3644 100644
--- a/DunePerfRegression/unit_tri_maker_create_1ms.patch
+++ b/DunePerfRegression/unit_tri_maker_create_1ms.patch
@@ -7,7 +7,7 @@ index e088ff8..27c1282 100644
          Dune::GridFactory<Grid> gf;
          Dune::FieldVector<typename Grid::ctype, 2> pos;
 -
-+        busy_sleep_for_millisecs(1);
++       fp_util::busy_sleep_for_millisecs(1);
          pos[0] = 0; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 1; pos[1] = 0; gf.insertVertex(pos);
          pos[0] = 0; pos[1] = 1; gf.insertVertex(pos);
@@ -15,7 +15,7 @@ index e088ff8..27c1282 100644
    typedef Dune::ALUGrid<2,2,Dune::simplex,Dune::nonconforming> Grid;
  public:
    static std::unique_ptr<Grid> create() {
-+    busy_sleep_for_millisecs(1);
++   fp_util::busy_sleep_for_millisecs(1);
      return std::unique_ptr<Grid>(new Grid(GRIDSDIR "/2dtriangle.alu"));
    }
  };