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comm/example/TimeMonitor/cxx_main.cpp
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43 
44 #include "Teuchos_TimeMonitor.hpp"
45 #include "Teuchos_Version.hpp"
46 
47 #ifdef HAVE_MPI
48 #include <mpi.h>
49 #endif
50 
51 using namespace Teuchos;
52 
53 // Global Timers
56 
57 // Quadratic function declaration.
58 double quadFunc( double x );
59 
60 // Factorial function declaration.
61 double factFunc( int x );
62 
63 int main(int argc, char* argv[])
64 {
65  std::cout << Teuchos::Teuchos_Version() << std::endl << std::endl;
66 
67  int i;
68  double x;
69 
70 #ifdef HAVE_MPI
71  MPI_Init(&argc, &argv);
72 #endif
73 
74  // Apply the quadratic function.
75  for( i=-100; i<100; i++ ) {
76  x = quadFunc( (double) i );
77  (void)x; // Not used!
78  }
79 
80  // Apply the factorial function.
81  for( i=0; i<100; i++ ) {
82  x = factFunc( i );
83  (void)x; // Not used!
84  }
85 
86  // Get a summary from the time monitor.
88 
89 #ifdef HAVE_MPI
90  MPI_Finalize();
91 #endif
92 
93  return 0;
94 }
95 
96 /* Evaluate a quadratic function at point x */
97 double quadFunc( double x )
98 {
99  // Construct a local time monitor, this starts the CompTime timer and will stop when leaving scope.
100  Teuchos::TimeMonitor LocalTimer(*CompTime);
101 
102  // Evaluate the quadratic function.
103  return ( x*x - 1.0 );
104 }
105 
106 /* Compute the factorial of x */
107 double factFunc( int x )
108 {
109  // Construct a local time monitor, this starts the FactTime timer and will stop when leaving scope.
110  Teuchos::TimeMonitor LocalTimer(*FactTime);
111 
112  // Special returns for specific cases.
113  if( x == 0 ) return 0.0;
114  if( x == 1 ) return 1.0;
115 
116  // Evaluate the factorial function.
117  return ( (double) x * factFunc(x-1) );
118 }
double quadFunc(double x)
static RCP< Time > getNewCounter(const std::string &name)
Create a new counter with the specified name and add it to a global set of counters of this type...
static void summarize(Ptr< const Comm< int > > comm, std::ostream &out=std::cout, const bool alwaysWriteLocal=false, const bool writeGlobalStats=true, const bool writeZeroTimers=true, const ECounterSetOp setOp=Intersection, const std::string &filter="", const bool ignoreZeroTimers=false)
Print summary statistics for all timers on the given communicator.
RCP< Time > FactTime
std::string Teuchos_Version()
int main(int argc, char *argv[])
double factFunc(int x)
Scope guard for Teuchos::Time, with MPI collective timer reporting.
Smart reference counting pointer class for automatic garbage collection.
RCP< Time > CompTime
Scope guard for Time, that can compute MPI collective timer statistics.