127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/*
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* M*LIB - common functions for bench module
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*
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* Copyright (c) 2017-2019, Patrick Pelissier
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* All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* + Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* + Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __COMMON_BENCH__H
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#define __COMMON_BENCH__H
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#if defined(_WIN32)
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/* WINDOWS variant */
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#include <windows.h>
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static unsigned long long
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cputime (void)
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{
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LARGE_INTEGER freq, val;
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QueryPerformanceFrequency(&freq);
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QueryPerformanceCounter(&val);
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return (unsigned long long) (1000000. * (double) val.QuadPart / (double) freq.QuadPart);
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}
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#else
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/* UNIX variant */
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#include <sys/types.h>
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#include <sys/resource.h>
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#include <sys/time.h>
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static unsigned long long
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cputime (void)
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{
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#if defined(MULTI_THREAD_MEASURE)
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// Multi thread
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struct timeval tv;
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gettimeofday (&tv, NULL);
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return tv.tv_sec * 1000000ULL + tv.tv_usec;
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#else
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// Single thread
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struct rusage rus;
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getrusage (0, &rus);
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return rus.ru_utime.tv_sec * 1000000ULL + rus.ru_utime.tv_usec;
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#endif
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}
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#endif
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unsigned long g_result;
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#if defined(MULTI_THREAD_MEASURE)
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M_THREAD_ATTR
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#endif
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unsigned int randValue = 0;
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static void rand_init(void)
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{
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randValue = 0;
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}
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static unsigned int rand_get(void)
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{
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randValue = randValue * 31421U + 6927U;
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return randValue;
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}
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static void test_function(const char str[], size_t n, void (*func)(size_t))
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{
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unsigned long long start, end;
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rand_init();
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start = cputime();
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(*func)(n);
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end = cputime();
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end = (end - start) / 1000U;
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printf ("%s %lu ms for n = %lu [r=%lu]\n", str, (unsigned long) end, (unsigned long) n, g_result);
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}
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#if defined(_WIN32)
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# include <windows.h>
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#elif (defined(__APPLE__) && defined(__MACH__)) \
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|| defined(__DragonFly__) || defined(__FreeBSD__) \
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|| defined(__NetBSD__) || defined(__OpenBSD__)
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# include <sys/param.h>
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# include <sys/sysctl.h>
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# define USE_SYSCTL
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#else
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# include <unistd.h>
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#endif
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/* Return the number of CPU of the system */
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static inline int get_cpu_count(void)
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{
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#if defined(_WIN32)
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SYSTEM_INFO sysinfo;
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GetSystemInfo(&sysinfo);
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return sysinfo.dwNumberOfProcessors;
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#elif defined(USE_SYSCTL)
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int nm[2];
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int count = 0;
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size_t len = sizeof (count);
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nm[0] = CTL_HW;
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nm[1] = HW_NCPU;
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sysctl(nm, 2, &count, &len, NULL, 0);
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return MAX(1, count);
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#elif defined (_SC_NPROCESSORS_ONLN)
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return sysconf(_SC_NPROCESSORS_ONLN);
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#else
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return 1;
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#endif
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}
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#endif
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