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/*
* Copyright 2013-2015 Samy Al Bahra.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <ck_cc.h>
#include <ck_sequence.h>
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include "../../common.h"
#ifndef STEPS
#define STEPS (65536 * 64)
#endif
static ck_sequence_t seqlock CK_CC_CACHELINE = CK_SEQUENCE_INITIALIZER;
int
main(void)
{
unsigned int i = 0;
unsigned int version;
uint64_t a, s;
/* Read-side latency. */
a = 0;
for (i = 0; i < STEPS / 4; i++) {
s = rdtsc();
ck_sequence_read_retry(&seqlock, ck_sequence_read_begin(&seqlock));
ck_sequence_read_retry(&seqlock, ck_sequence_read_begin(&seqlock));
ck_sequence_read_retry(&seqlock, ck_sequence_read_begin(&seqlock));
ck_sequence_read_retry(&seqlock, ck_sequence_read_begin(&seqlock));
a += rdtsc() - s;
}
printf("read: %" PRIu64 "\n", a / STEPS);
a = 0;
for (i = 0; i < STEPS / 4; i++) {
s = rdtsc();
CK_SEQUENCE_READ(&seqlock, &version);
CK_SEQUENCE_READ(&seqlock, &version);
CK_SEQUENCE_READ(&seqlock, &version);
CK_SEQUENCE_READ(&seqlock, &version);
a += rdtsc() - s;
}
printf("READ %" PRIu64 "\n", a / STEPS);
/* Write-side latency. */
a = 0;
for (i = 0; i < STEPS / 4; i++) {
s = rdtsc();
ck_sequence_write_begin(&seqlock);
ck_sequence_write_end(&seqlock);
ck_sequence_write_begin(&seqlock);
ck_sequence_write_end(&seqlock);
ck_sequence_write_begin(&seqlock);
ck_sequence_write_end(&seqlock);
ck_sequence_write_begin(&seqlock);
ck_sequence_write_end(&seqlock);
a += rdtsc() - s;
}
printf("write: %" PRIu64 "\n", a / STEPS);
return 0;
}
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