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timer.h
1 /*
2  * timer.h
3  *
4  * Author: Steffen Ernsting <s.ernsting@uni-muenster.de>
5  *
6  * -------------------------------------------------------------------------------
7  *
8  * The MIT License
9  *
10  * Copyright 2014 Steffen Ernsting <s.ernsting@uni-muenster.de>,
11  * Herbert Kuchen <kuchen@uni-muenster.de.
12  *
13  * Permission is hereby granted, free of charge, to any person obtaining a copy
14  * of this software and associated documentation files (the "Software"), to deal
15  * in the Software without restriction, including without limitation the rights
16  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
17  * copies of the Software, and to permit persons to whom the Software is
18  * furnished to do so, subject to the following conditions:
19  *
20  * The above copyright notice and this permission notice shall be included in
21  * all copies or substantial portions of the Software.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
26  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
27  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
28  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
29  * THE SOFTWARE.
30  *
31  */
32 
33 #pragma once
34 
35 #include <mpi.h>
36 #include <sstream>
37 
38 namespace msl {
39 
43 class Timer
44 {
45 public:
50  : start(MPI_Wtime()),
51  split(MPI_Wtime()),
52  end(0.0),
53  splits(0)
54  {
55  }
56 
62  Timer(const std::string& n)
63  : start(MPI_Wtime()),
64  split(MPI_Wtime()),
65  end(0.0), splits(0),
66  name(n)
67  {
68  }
69 
75  double stop()
76  {
77  MPI_Barrier(MPI_COMM_WORLD);
78  end = MPI_Wtime();
79  return end-start;
80  }
81 
87  double splitTime()
88  {
89  MPI_Barrier(MPI_COMM_WORLD);
90  double result = MPI_Wtime() - split;
91  split = MPI_Wtime();
92  splits++;
93  return result;
94  }
95 
101  double totalTime()
102  {
103  if (end == 0.0) {
104  return stop();
105  } else {
106  return end - start;
107  }
108  }
109 
116  {
117  return splits;
118  }
119 
120 private:
121  double start, split, end;
122  int splits;
123  std::string name;
124 };
125 
126 }
127 
128 
Timer()
Default constructor.
Definition: timer.h:49
double splitTime()
Sets a split time.
Definition: timer.h:87
double stop()
Stops the timer.
Definition: timer.h:75
Class Timer for timing purposes.
Definition: timer.h:43
double totalTime()
Returns the total elapsed time.
Definition: timer.h:101
Timer(const std::string &n)
Definition: timer.h:62
int getNumSplits()
Returns the number of splits.
Definition: timer.h:115