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92 lines
2.8 KiB
92 lines
2.8 KiB
/*
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* Copyright 2013-2015 Samy Al Bahra.
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* All rights reserved.
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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
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* are met:
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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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* 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 distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <ck_cc.h>
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#include <ck_sequence.h>
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#include <errno.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include "../../common.h"
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#ifndef STEPS
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#define STEPS (65536 * 64)
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#endif
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static ck_sequence_t seqlock CK_CC_CACHELINE = CK_SEQUENCE_INITIALIZER;
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int
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main(void)
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{
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unsigned int i = 0;
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unsigned int version;
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uint64_t a, s;
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/* Read-side latency. */
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a = 0;
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for (i = 0; i < STEPS / 4; i++) {
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s = rdtsc();
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ck_sequence_read_retry(&seqlock, ck_sequence_read_begin(&seqlock));
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ck_sequence_read_retry(&seqlock, ck_sequence_read_begin(&seqlock));
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ck_sequence_read_retry(&seqlock, ck_sequence_read_begin(&seqlock));
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ck_sequence_read_retry(&seqlock, ck_sequence_read_begin(&seqlock));
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a += rdtsc() - s;
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}
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printf("read: %" PRIu64 "\n", a / STEPS);
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a = 0;
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for (i = 0; i < STEPS / 4; i++) {
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s = rdtsc();
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CK_SEQUENCE_READ(&seqlock, &version);
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CK_SEQUENCE_READ(&seqlock, &version);
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CK_SEQUENCE_READ(&seqlock, &version);
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CK_SEQUENCE_READ(&seqlock, &version);
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a += rdtsc() - s;
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}
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printf("READ %" PRIu64 "\n", a / STEPS);
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/* Write-side latency. */
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a = 0;
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for (i = 0; i < STEPS / 4; i++) {
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s = rdtsc();
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ck_sequence_write_begin(&seqlock);
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ck_sequence_write_end(&seqlock);
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ck_sequence_write_begin(&seqlock);
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ck_sequence_write_end(&seqlock);
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ck_sequence_write_begin(&seqlock);
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ck_sequence_write_end(&seqlock);
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ck_sequence_write_begin(&seqlock);
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ck_sequence_write_end(&seqlock);
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a += rdtsc() - s;
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}
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printf("write: %" PRIu64 "\n", a / STEPS);
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return 0;
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}
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