| /* FLAC - Free Lossless Audio Codec |
| * Copyright (C) 2015-2016 Xiph.Org Foundation |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - 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. |
| * |
| * - Neither the name of the Xiph.org Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * ``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 THE FOUNDATION OR |
| * 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. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <stdlib.h> |
| #include "util.h" |
| |
| #if defined _WIN32 |
| |
| #include <windows.h> |
| |
| static double |
| counter_diff (const LARGE_INTEGER * start, const LARGE_INTEGER * end) |
| { |
| LARGE_INTEGER diff, freq; |
| |
| QueryPerformanceFrequency(&freq); |
| diff.QuadPart = end->QuadPart - start->QuadPart; |
| |
| return (double)diff.QuadPart/(double)freq.QuadPart; |
| } |
| |
| double |
| benchmark_function (void (*testfunc) (void), unsigned count) |
| { |
| LARGE_INTEGER start, end; |
| unsigned k; |
| |
| QueryPerformanceCounter (&start) ; |
| |
| for (k = 0 ; k < count ; k++) |
| testfunc(); |
| |
| QueryPerformanceCounter (&end) ; |
| |
| return counter_diff (&start, &end) / count ; |
| } /* benchmark_function */ |
| |
| #elif defined FLAC__SYS_DARWIN |
| |
| #include <mach/mach_time.h> |
| |
| static double |
| counter_diff (const uint64_t * start, const uint64_t * end) |
| { |
| mach_timebase_info_data_t t_info; |
| mach_timebase_info(&t_info); |
| uint64_t duration = *end - *start; |
| |
| return duration * ((double)t_info.numer/(double)t_info.denom); |
| } |
| |
| double |
| benchmark_function (void (*testfunc) (void), unsigned count) |
| { |
| uint64_t start, end; |
| unsigned k; |
| |
| start = mach_absolute_time(); |
| |
| for (k = 0 ; k < count ; k++) |
| testfunc(); |
| |
| end = mach_absolute_time(); |
| |
| return counter_diff (&start, &end) / count ; |
| } /* benchmark_function */ |
| |
| #elif defined HAVE_CLOCK_GETTIME |
| |
| #include <time.h> |
| #include <sys/time.h> |
| |
| static double |
| timespec_diff (const struct timespec * start, const struct timespec * end) |
| { struct timespec diff; |
| |
| if (end->tv_nsec - start->tv_nsec < 0) |
| { diff.tv_sec = end->tv_sec - start->tv_sec - 1 ; |
| diff.tv_nsec = 1000000000 + end->tv_nsec - start->tv_nsec ; |
| } |
| else |
| { diff.tv_sec = end->tv_sec - start->tv_sec ; |
| diff.tv_nsec = end->tv_nsec-start->tv_nsec ; |
| } ; |
| |
| return diff.tv_sec + 1e-9 * diff.tv_nsec ; |
| } |
| |
| double |
| benchmark_function (void (*testfunc) (void), unsigned count) |
| { struct timespec start, end; |
| unsigned k ; |
| |
| clock_gettime (CLOCK_PROCESS_CPUTIME_ID, &start) ; |
| |
| for (k = 0 ; k < count ; k++) |
| testfunc () ; |
| |
| clock_gettime (CLOCK_PROCESS_CPUTIME_ID, &end) ; |
| |
| return timespec_diff (&start, &end) / count ; |
| } /* benchmark_function */ |
| |
| #else |
| |
| #include <time.h> |
| #include <sys/time.h> |
| |
| static double |
| timeval_diff (const struct timeval * start, const struct timeval * end) |
| { struct timeval diff; |
| |
| if (end->tv_usec - start->tv_usec < 0) |
| { diff.tv_sec = end->tv_sec - start->tv_sec - 1 ; |
| diff.tv_usec = 1000000 + end->tv_usec - start->tv_usec ; |
| } |
| else |
| { diff.tv_sec = end->tv_sec - start->tv_sec ; |
| diff.tv_usec = end->tv_usec-start->tv_usec ; |
| } ; |
| |
| return diff.tv_sec + 1e-6 * diff.tv_usec ; |
| } |
| |
| double |
| benchmark_function (void (*testfunc) (void), unsigned count) |
| { struct timeval start, end; |
| unsigned k ; |
| |
| gettimeofday(&start, NULL); |
| |
| for (k = 0 ; k < count ; k++) |
| testfunc () ; |
| |
| gettimeofday(&end, NULL); |
| |
| return timeval_diff (&start, &end) / count ; |
| } /* benchmark_function */ |
| |
| #endif |
| |
| static int |
| double_cmp (const void * a, const void * b) |
| { const double * pa = (double *) a ; |
| const double * pb = (double *) b ; |
| return pa [0] < pb [0] ; |
| } /* double_cmp */ |
| |
| void |
| benchmark_stats (bench_stats * stats) |
| { double sum, times [stats->run_count] ; |
| unsigned k ; |
| |
| for (k = 0 ; k < stats->run_count ; k++) |
| times [k] = benchmark_function (stats->testfunc, stats->loop_count) ; |
| |
| qsort (times, stats->run_count, sizeof (times [0]), double_cmp) ; |
| |
| sum = 0.0 ; |
| stats->min_time = stats->max_time = times [0] ; |
| for (k = 0 ; k < stats->run_count ; k++) |
| { stats->min_time = stats->min_time < times [k] ? stats->min_time : times [k] ; |
| stats->max_time = stats->max_time > times [k] ? stats->max_time : times [k] ; |
| sum += times [k] ; |
| } |
| stats->mean_time = sum / stats->run_count ; |
| if (stats->run_count & 1) |
| stats->median_time = times [(stats->run_count + 1) / 2] ; |
| else |
| stats->median_time = 0.5 * (times [stats->run_count / 2] + times [(stats->run_count / 2) + 1]) ; |
| |
| return ; |
| } /* benchmark_stats */ |