106 lines
3.9 KiB
C
106 lines
3.9 KiB
C
// This file is dual-licensed. Choose whichever licence you want from
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// the two licences listed below.
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//
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// The first licence is a regular 2-clause BSD licence. The second licence
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// is the CC-0 from Creative Commons. It is intended to release Monocypher
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// to the public domain. The BSD licence serves as a fallback option.
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//
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// SPDX-License-Identifier: BSD-2-Clause OR CC0-1.0
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//
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// ------------------------------------------------------------------------
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//
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// Copyright (c) 2017-2019, Loup Vaillant
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// All rights reserved.
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//
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//
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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
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// met:
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//
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// 1. 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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//
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// 2. 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
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// distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// 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
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// ------------------------------------------------------------------------
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//
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// Written in 2017-2019 by Loup Vaillant
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//
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// To the extent possible under law, the author(s) have dedicated all copyright
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// and related neighboring rights to this software to the public domain
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// worldwide. This software is distributed without any warranty.
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//
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// You should have received a copy of the CC0 Public Domain Dedication along
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// with this software. If not, see
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// <https://creativecommons.org/publicdomain/zero/1.0/>
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#include <time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "utils.h"
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typedef struct timespec timespec;
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// TODO: provide a user defined buffer size
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#define KILOBYTE 1024
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#define MEGABYTE 1024 * KILOBYTE
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#define SIZE (256 * KILOBYTE)
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#define MUL (MEGABYTE / SIZE)
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#define BILLION 1000000000
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// Difference in nanoseconds
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static u64 diff(timespec start, timespec end)
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{
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return (u64)((end.tv_sec - start.tv_sec ) * BILLION +
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(end.tv_nsec - start.tv_nsec));
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}
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static u64 min(u64 a, u64 b)
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{
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return a < b ? a : b;
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}
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static void print(const char *name, u64 duration, const char *unit)
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{
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if (duration == 0) {
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printf("%s: too fast to be measured\n", name);
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} else {
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u64 speed_hz = BILLION / duration;
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printf("%s: %5" PRIu64 " %s\n", name, speed_hz, unit);
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}
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}
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// Note: not all systems will work well with CLOCK_PROCESS_CPUTIME_ID.
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// If you get weird timings on your system, you may want to replace it
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// with another clock id. Perhaps even replace clock_gettime().
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#define TIMESTAMP(t) \
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timespec t; \
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clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &t)
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#define TIMING_START \
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u64 duration = (u64)-1; \
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FOR (i, 0, 500) { \
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TIMESTAMP(start);
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#define TIMING_END \
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TIMESTAMP(end); \
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duration = min(duration, diff(start, end)); \
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} /* end FOR*/ \
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return duration
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