/usr/include/viennacl/tools/timer.hpp is in libviennacl-dev 1.7.1+dfsg1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | #ifndef _VIENNACL_TOOLS_TIMER_HPP_
#define _VIENNACL_TOOLS_TIMER_HPP_
/* =========================================================================
Copyright (c) 2010-2016, Institute for Microelectronics,
Institute for Analysis and Scientific Computing,
TU Wien.
Portions of this software are copyright by UChicago Argonne, LLC.
-----------------
ViennaCL - The Vienna Computing Library
-----------------
Project Head: Karl Rupp rupp@iue.tuwien.ac.at
(A list of authors and contributors can be found in the manual)
License: MIT (X11), see file LICENSE in the base directory
============================================================================= */
/** @file viennacl/tools/timer.hpp
@brief A simple, yet (mostly) sufficiently accurate timer for benchmarking and profiling. */
#include <iostream>
#ifdef _WIN32
#define WINDOWS_LEAN_AND_MEAN
#include <windows.h>
#undef min
#undef max
namespace viennacl
{
namespace tools
{
/** @brief Simple timer class based on gettimeofday (POSIX) or QueryPerformanceCounter (Windows).
*
* Avoids messing with Boost and should be sufficient for benchmarking purposes.
*/
class timer
{
public:
timer()
{
QueryPerformanceFrequency(&freq);
}
void start()
{
QueryPerformanceCounter((LARGE_INTEGER*) &start_time);
}
double get() const
{
LARGE_INTEGER elapsed;
QueryPerformanceCounter((LARGE_INTEGER*) &end_time);
elapsed.QuadPart = end_time.QuadPart - start_time.QuadPart;
return elapsed.QuadPart / static_cast<double>(freq.QuadPart);
}
private:
LARGE_INTEGER freq;
LARGE_INTEGER start_time;
LARGE_INTEGER end_time;
};
}
}
#else
#include <sys/time.h>
namespace viennacl
{
namespace tools
{
/** @brief Simple timer class based on gettimeofday (POSIX) or QueryPerformanceCounter (Windows).
*
* Avoids messing with Boost and should be sufficient for benchmarking purposes.
*/
class timer
{
public:
timer() : ts(0)
{}
void start()
{
struct timeval tval;
gettimeofday(&tval, NULL);
ts = static_cast<double>(tval.tv_sec * 1000000 + tval.tv_usec);
}
double get() const
{
struct timeval tval;
gettimeofday(&tval, NULL);
double end_time = static_cast<double>(tval.tv_sec * 1000000 + tval.tv_usec);
return static_cast<double>(end_time-ts) / 1000000.0;
}
private:
double ts;
};
}
}
#endif
#endif
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