Teuchos - Trilinos Tools Package Version of the Day
Loading...
Searching...
No Matches
TimeMonitor/cxx_main.cpp

This is an example of how to use the Teuchos::TimeMonitor class.

/*
// @HEADER
// ***********************************************************************
//
// Teuchos: Common Tools Package
// Copyright (2004) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
// @HEADER
*/
#include "Teuchos_Version.hpp"
#ifdef HAVE_MPI
#include <mpi.h>
#endif
using namespace Teuchos;
// Global Timers
RCP<Time> CompTime = TimeMonitor::getNewCounter("Computational Time");
RCP<Time> FactTime = TimeMonitor::getNewCounter("Factorial Time");
// Quadratic function declaration.
double quadFunc( double x );
// Factorial function declaration.
double factFunc( int x );
int main(int argc, char* argv[])
{
std::cout << Teuchos::Teuchos_Version() << std::endl << std::endl;
int i;
double x;
#ifdef HAVE_MPI
#endif
// Apply the quadratic function.
for( i=-100; i<100; i++ ) {
x = quadFunc( (double) i );
(void)x; // Not used!
}
// Apply the factorial function.
for( i=0; i<100; i++ ) {
x = factFunc( i );
(void)x; // Not used!
}
// Get a summary from the time monitor.
TimeMonitor::summarize();
#ifdef HAVE_MPI
#endif
return 0;
}
/* Evaluate a quadratic function at point x */
double quadFunc( double x )
{
// Construct a local time monitor, this starts the CompTime timer and will stop when leaving scope.
// Evaluate the quadratic function.
return ( x*x - 1.0 );
}
/* Compute the factorial of x */
double factFunc( int x )
{
// Construct a local time monitor, this starts the FactTime timer and will stop when leaving scope.
// Special returns for specific cases.
if( x == 0 ) return 0.0;
if( x == 1 ) return 1.0;
// Evaluate the factorial function.
return ( (double) x * factFunc(x-1) );
}
Scope guard for Teuchos::Time, with MPI collective timer reporting.
Smart reference counting pointer class for automatic garbage collection.
Scope guard for Time, that can compute MPI collective timer statistics.
The Teuchos namespace contains all of the classes, structs and enums used by Teuchos,...