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annotate src/fftw-3.3.5/libbench2/timer.c @ 83:ae30d91d2ffe

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Replace these with versions built using an older toolset (so as to avoid ABI compatibilities when linking on Ubuntu 14.04 for packaging purposes)
author Chris Cannam
date Fri, 07 Feb 2020 11:51:13 +0000
parents 2cd0e3b3e1fd
children
rev   line source
Chris@42 1 /*
Chris@42 2 * Copyright (c) 2001 Matteo Frigo
Chris@42 3 * Copyright (c) 2001 Massachusetts Institute of Technology
Chris@42 4 *
Chris@42 5 * This program is free software; you can redistribute it and/or modify
Chris@42 6 * it under the terms of the GNU General Public License as published by
Chris@42 7 * the Free Software Foundation; either version 2 of the License, or
Chris@42 8 * (at your option) any later version.
Chris@42 9 *
Chris@42 10 * This program is distributed in the hope that it will be useful,
Chris@42 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@42 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Chris@42 13 * GNU General Public License for more details.
Chris@42 14 *
Chris@42 15 * You should have received a copy of the GNU General Public License
Chris@42 16 * along with this program; if not, write to the Free Software
Chris@42 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Chris@42 18 *
Chris@42 19 */
Chris@42 20
Chris@42 21
Chris@42 22 #include "bench.h"
Chris@42 23 #include <stdio.h>
Chris@42 24
Chris@42 25 /*
Chris@42 26 * System-dependent timing functions:
Chris@42 27 */
Chris@42 28 #ifdef HAVE_SYS_TIME_H
Chris@42 29 #include <sys/time.h>
Chris@42 30 #endif
Chris@42 31
Chris@42 32 #ifdef HAVE_UNISTD_H
Chris@42 33 #include <unistd.h>
Chris@42 34 #endif
Chris@42 35
Chris@42 36 #ifdef HAVE_BSDGETTIMEOFDAY
Chris@42 37 #ifndef HAVE_GETTIMEOFDAY
Chris@42 38 #define gettimeofday BSDgettimeofday
Chris@42 39 #define HAVE_GETTIMEOFDAY 1
Chris@42 40 #endif
Chris@42 41 #endif
Chris@42 42
Chris@42 43 double time_min;
Chris@42 44 int time_repeat;
Chris@42 45
Chris@42 46 #if !defined(HAVE_TIMER) && (defined(__WIN32__) || defined(_WIN32) || defined(_WINDOWS) || defined(__CYGWIN__))
Chris@42 47 #include <windows.h>
Chris@42 48 typedef LARGE_INTEGER mytime;
Chris@42 49
Chris@42 50 static mytime get_time(void)
Chris@42 51 {
Chris@42 52 mytime tv;
Chris@42 53 QueryPerformanceCounter(&tv);
Chris@42 54 return tv;
Chris@42 55 }
Chris@42 56
Chris@42 57 static double elapsed(mytime t1, mytime t0)
Chris@42 58 {
Chris@42 59 LARGE_INTEGER freq;
Chris@42 60 QueryPerformanceFrequency(&freq);
Chris@42 61 return (((double) t1.QuadPart - (double) t0.QuadPart)) /
Chris@42 62 ((double) freq.QuadPart);
Chris@42 63 }
Chris@42 64
Chris@42 65 #define HAVE_TIMER
Chris@42 66 #endif
Chris@42 67
Chris@42 68
Chris@42 69 #if defined(HAVE_GETTIMEOFDAY) && !defined(HAVE_TIMER)
Chris@42 70 typedef struct timeval mytime;
Chris@42 71
Chris@42 72 static mytime get_time(void)
Chris@42 73 {
Chris@42 74 struct timeval tv;
Chris@42 75 gettimeofday(&tv, 0);
Chris@42 76 return tv;
Chris@42 77 }
Chris@42 78
Chris@42 79 static double elapsed(mytime t1, mytime t0)
Chris@42 80 {
Chris@42 81 return ((double) t1.tv_sec - (double) t0.tv_sec) +
Chris@42 82 ((double) t1.tv_usec - (double) t0.tv_usec) * 1.0E-6;
Chris@42 83 }
Chris@42 84
Chris@42 85 #define HAVE_TIMER
Chris@42 86 #endif
Chris@42 87
Chris@42 88 #ifndef HAVE_TIMER
Chris@42 89 #error "timer not defined"
Chris@42 90 #endif
Chris@42 91
Chris@42 92 static double calibrate(void)
Chris@42 93 {
Chris@42 94 /* there seems to be no reasonable way to calibrate the
Chris@42 95 clock automatically any longer. Grrr... */
Chris@42 96
Chris@42 97 return 0.01;
Chris@42 98 }
Chris@42 99
Chris@42 100
Chris@42 101 void timer_init(double tmin, int repeat)
Chris@42 102 {
Chris@42 103 static int inited = 0;
Chris@42 104
Chris@42 105 if (inited)
Chris@42 106 return;
Chris@42 107 inited = 1;
Chris@42 108
Chris@42 109 if (!repeat)
Chris@42 110 repeat = 8;
Chris@42 111 time_repeat = repeat;
Chris@42 112
Chris@42 113 if (tmin > 0)
Chris@42 114 time_min = tmin;
Chris@42 115 else
Chris@42 116 time_min = calibrate();
Chris@42 117 }
Chris@42 118
Chris@42 119 static mytime t0[BENCH_NTIMERS];
Chris@42 120
Chris@42 121 void timer_start(int n)
Chris@42 122 {
Chris@42 123 BENCH_ASSERT(n >= 0 && n < BENCH_NTIMERS);
Chris@42 124 t0[n] = get_time();
Chris@42 125 }
Chris@42 126
Chris@42 127 double timer_stop(int n)
Chris@42 128 {
Chris@42 129 mytime t1;
Chris@42 130 BENCH_ASSERT(n >= 0 && n < BENCH_NTIMERS);
Chris@42 131 t1 = get_time();
Chris@42 132 return elapsed(t1, t0[n]);
Chris@42 133 }
Chris@42 134