Fix a few CI tests for single precision (#4785)

The tolerance needs to be adjusted for single precision.

Author: WeiqunZhang

Tests/Algebra/GMRES/main.cpp

@@ -113,7 +113,11 @@ int main (int argc, char* argv[])
         amrex::Axpy(xvec, Real(-1.0), exact);
         auto error = xvec.norminf();
         amrex::Print() << " Max norm error: " << error << "\n";
+#ifdef AMREX_USE_FLOAT
+        AMREX_ALWAYS_ASSERT(error < eps);
+#else
         AMREX_ALWAYS_ASSERT(error*10 < eps);
+#endif
     }
     amrex::Finalize();
 }

Tests/CommType/main.cpp

@@ -12,9 +12,9 @@ int main(int argc, char* argv[])
     int ret_code = EXIT_SUCCESS;
 
     {
-        int ncells = 128;
+        int ncells = 64;
         BoxArray ba(Box(IntVect(0), IntVect(ncells-1)));
-        ba.maxSize(32);
+        ba.maxSize(16);
         ba.convert(IntVect(1));
         DistributionMapping dm(ba);
 

Tests/FFT/Batch/main.cpp

@@ -106,7 +106,7 @@ int main (int argc, char* argv[])
             auto error = mf2.norminf(0, batch_size, IntVect(0));
             amrex::Print() << "  Expected to be close to zero: " << error << "\n";
 #ifdef AMREX_USE_FLOAT
-            auto eps = 1.e-6f;
+            auto eps = 3.e-6F;
 #else
             auto eps = 1.e-13;
 #endif
@@ -133,7 +133,7 @@ int main (int argc, char* argv[])
             auto error = errmf.norminf(0, batch_size, IntVect(0));
             amrex::Print() << "  Expected to be close to zero: " << error << "\n";
 #ifdef AMREX_USE_FLOAT
-            auto eps = 0.5e-6f;
+            auto eps = 3.e-6F;
 #else
             auto eps = 1.e-15;
 #endif
@@ -156,7 +156,7 @@ int main (int argc, char* argv[])
             auto error = mf2.norminf(0, batch_size, IntVect(0));
             amrex::Print() << "  Expected to be close to zero: " << error << "\n";
 #ifdef AMREX_USE_FLOAT
-            auto eps = 1.e-6f;
+            auto eps = 3.e-6F;
 #else
             auto eps = 1.e-13;
 #endif

Tests/FFT/RawPtr/main.cpp

@@ -69,7 +69,7 @@ int main (int argc, char* argv[])
                      });
         amrex::Print() << "  Expected to be close to zero: " << error << "\n";
 #ifdef AMREX_USE_FLOAT
-        auto eps = 1.e-6f;
+        auto eps = 3.e-6F;
 #else
         auto eps = 1.e-13;
 #endif
@@ -124,7 +124,7 @@ int main (int argc, char* argv[])
                      });
         amrex::Print() << "  Expected to be close to zero: " << error << "\n";
 #ifdef AMREX_USE_FLOAT
-        auto eps = 1.e-6f;
+        auto eps = 3.e-6F;
 #else
         auto eps = 1.e-13;
 #endif

Tests/LinearSolvers/NodalPoisson/MyTest.cpp

@@ -166,6 +166,9 @@ MyTest::readParameters ()
     pp.query("max_iter", max_iter);
     pp.query("max_fmg_iter", max_fmg_iter);
     pp.query("reltol", reltol);
+#ifdef AMREX_USE_FLOAT
+        reltol = std::max(reltol, 1.e-5F);
+#endif
 
     pp.query("gpu_regtest", gpu_regtest);
 

Tests/LinearSolvers/Nodal_Projection_EB/main.cpp

@@ -249,7 +249,11 @@ int main (int argc, char* argv[])
         //    nodal_solver.setBottomSolver(MLMG::BottomSolver::hypre);
 
         // Define the relative tolerance
+#ifdef AMREX_USE_FLOAT
+        Real reltol = 2.e-4;
+#else
         Real reltol = 1.e-8;
+#endif
 
         // Define the absolute tolerance; note that this argument is optional
         Real abstol = 1.e-15;