--- /dev/null
+// ---------------------------------------------------------------------
+// $Id: vec_00.cc 31681 2013-11-16 08:04:28Z maier $
+//
+// Copyright (C) 2004 - 2013 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// The deal.II library is free software; you can use it, redistribute
+// it, and/or modify it under the terms of the GNU Lesser General
+// Public License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// The full text of the license can be found in the file LICENSE at
+// the top level of the deal.II distribution.
+//
+// ---------------------------------------------------------------------
+
+
+
+// check that all_zero is working correctly (as a collective operation)
+
+#include "../tests.h"
+#include <deal.II/lac/generic_linear_algebra.h>
+#include <deal.II/base/index_set.h>
+#include <fstream>
+#include <iostream>
+#include <iomanip>
+#include <vector>
+
+#include "gla.h"
+
+template <class LA>
+void test ()
+{
+ unsigned int myid = Utilities::MPI::this_mpi_process (MPI_COMM_WORLD);
+ unsigned int numproc = Utilities::MPI::n_mpi_processes (MPI_COMM_WORLD);
+
+ if (myid==0)
+ deallog << "numproc=" << numproc << std::endl;
+
+ // each processor owns 2 indices and all
+ // are ghosting Element 1 (the second)
+
+ IndexSet local_active(numproc*2);
+ local_active.add_range(myid*2,myid*2+2);
+ IndexSet local_relevant(numproc*2);
+ local_relevant.add_range(1,2);
+
+
+ typename LA::MPI::Vector x;
+ x.reinit(local_active, MPI_COMM_WORLD);
+ x=0;
+ typename LA::MPI::Vector g(local_active, local_relevant, MPI_COMM_WORLD);
+ g=x;
+ deallog << "all_zero? " << g.all_zero() << " (should be true)" << std::endl;
+ if (myid==0)
+ x(0)=1.0;
+ x.compress(VectorOperation::insert);
+ g=x;
+ deallog << "all_zero? " << g.all_zero() << " (should be false)" << std::endl;
+
+ // done
+ if (myid==0)
+ deallog << "OK" << std::endl;
+}
+
+
+
+int main (int argc, char **argv)
+{
+ Utilities::MPI::MPI_InitFinalize mpi_initialization(argc, argv);
+ MPILogInitAll log;
+ unsigned int myid = Utilities::MPI::this_mpi_process (MPI_COMM_WORLD);
+
+ {
+ deallog.push("PETSc");
+ test<LA_PETSc>();
+ deallog.pop();
+ deallog.push("Trilinos");
+ test<LA_Trilinos>();
+ deallog.pop();
+ }
+
+ if (myid==9999)
+ test<LA_Dummy>(); // don't execute
+
+}
--- /dev/null
+
+DEAL:0:PETSc::numproc=3
+DEAL:0:PETSc::all_zero? 1 (should be true)
+DEAL:0:PETSc::all_zero? 0 (should be false)
+DEAL:0:PETSc::OK
+DEAL:0:Trilinos::numproc=3
+DEAL:0:Trilinos::all_zero? 1 (should be true)
+DEAL:0:Trilinos::all_zero? 0 (should be false)
+DEAL:0:Trilinos::OK
+
+DEAL:1:PETSc::all_zero? 1 (should be true)
+DEAL:1:PETSc::all_zero? 0 (should be false)
+DEAL:1:Trilinos::all_zero? 1 (should be true)
+DEAL:1:Trilinos::all_zero? 0 (should be false)
+
+
+DEAL:2:PETSc::all_zero? 1 (should be true)
+DEAL:2:PETSc::all_zero? 0 (should be false)
+DEAL:2:Trilinos::all_zero? 1 (should be true)
+DEAL:2:Trilinos::all_zero? 0 (should be false)
+