added diagnostic_interval int for nonlinear solver diagnostic.

Author: JustinRayAngus

Source/NonlinearSolvers/NewtonSolver.H

@@ -245,6 +245,7 @@ void NewtonSolver<Vec,Ops>::ParseParameters ()
     pp_newton.query("max_iterations",      m_maxits);
     pp_newton.query("require_convergence", m_require_convergence);
     pp_newton.query("diagnostic_file",     this->m_diagnostic_file);
+    pp_newton.query("diagnostic_interval", this->m_diagnostic_interval);
 
     const amrex::ParmParse pp_gmres("gmres");
     pp_gmres.query("verbose_int",         m_gmres_verbose_int);
@@ -358,7 +359,8 @@ void NewtonSolver<Vec,Ops>::Solve ( Vec&         a_U,
        }
     }
 
-    if (!this->m_diagnostic_file.empty() && amrex::ParallelDescriptor::IOProcessor()) {
+    if (!this->m_diagnostic_file.empty() && amrex::ParallelDescriptor::IOProcessor() &&
+        a_step%this->m_diagnostic_interval==0) {
         std::ofstream diagnostic_file{this->m_diagnostic_file, std::ofstream::out | std::ofstream::app};
         diagnostic_file << std::setprecision(14);
         diagnostic_file << a_step;

Source/NonlinearSolvers/NonlinearSolver.H

@@ -83,6 +83,7 @@ protected:
     bool m_is_defined = false;
     mutable bool m_verbose = true;
     std::string m_diagnostic_file;
+    int m_diagnostic_interval = 1;
 
 };
 

Source/NonlinearSolvers/PicardSolver.H

@@ -156,6 +156,7 @@ void PicardSolver<Vec,Ops>::ParseParameters ()
     pp_picard.query("max_iterations",      m_maxits);
     pp_picard.query("require_convergence", m_require_convergence);
     pp_picard.query("diagnostic_file",     this->m_diagnostic_file);
+    pp_picard.query("diagnostic_interval", this->m_diagnostic_interval);
 }
 
 template <class Vec, class Ops>
@@ -244,7 +245,8 @@ void PicardSolver<Vec,Ops>::Solve ( Vec&         a_U,
        }
     }
 
-    if (!this->m_diagnostic_file.empty() && amrex::ParallelDescriptor::IOProcessor()) {
+    if (!this->m_diagnostic_file.empty() && amrex::ParallelDescriptor::IOProcessor() &&
+        a_step%this->m_diagnostic_interval==0) {
         std::ofstream diagnostic_file{this->m_diagnostic_file, std::ofstream::out | std::ofstream::app};
         diagnostic_file << std::setprecision(14);
         diagnostic_file << a_step;