ck/regressions/ck_stack/benchmark/latency.c

/*
 * Copyright 2011-2015 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_stack.h>
#include <ck_spinlock.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>

#include "../../common.h"

#ifndef ENTRIES
#define ENTRIES 4096
#endif

#ifndef STEPS
#define STEPS 40000
#endif

/*
 * Note the redundant post-increment of r. This is to silence
 * some irrelevant GCC warnings.
 */

static ck_stack_t stack CK_CC_CACHELINE;

int
main(void)
{
	ck_stack_entry_t entry[ENTRIES];
	ck_spinlock_fas_t mutex = CK_SPINLOCK_FAS_INITIALIZER;
	volatile ck_stack_entry_t * volatile r;
	uint64_t s, e, a;
	unsigned int i;
	unsigned int j;

	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_stack_init(&stack);

		s = rdtsc();
		for (j = 0; j < ENTRIES; j++) {
			ck_spinlock_fas_lock(&mutex);
			ck_stack_push_spnc(&stack, entry + j);
			ck_spinlock_fas_unlock(&mutex);
		}
		e = rdtsc();

		a += e - s;
	}
	printf("     spinlock_push: %16" PRIu64 "\n", a / STEPS / ENTRIES);

	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_stack_init(&stack);

		for (j = 0; j < ENTRIES; j++)
			ck_stack_push_spnc(&stack, entry + j);

		s = rdtsc();
		for (j = 0; j < ENTRIES; j++) {
			ck_spinlock_fas_lock(&mutex);
			r = ck_stack_pop_npsc(&stack);
			ck_spinlock_fas_unlock(&mutex);
		}
		e = rdtsc();
		a += e - s;
	}
	printf("      spinlock_pop: %16" PRIu64 "\n", a / STEPS / ENTRIES);
	r++;

#ifdef CK_F_STACK_PUSH_UPMC
	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_stack_init(&stack);

		s = rdtsc();
		for (j = 0; j < ENTRIES; j++)
			ck_stack_push_upmc(&stack, entry + j);
		e = rdtsc();

		a += e - s;
	}
	printf("ck_stack_push_upmc: %16" PRIu64 "\n", a / STEPS / ENTRIES);
#endif /* CK_F_STACK_PUSH_UPMC */

#ifdef CK_F_STACK_PUSH_MPMC
	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_stack_init(&stack);

		s = rdtsc();
		for (j = 0; j < ENTRIES; j++)
			ck_stack_push_mpmc(&stack, entry + j);
		e = rdtsc();

		a += e - s;
	}
	printf("ck_stack_push_mpmc: %16" PRIu64 "\n", a / STEPS / ENTRIES);
#endif /* CK_F_STACK_PUSH_MPMC */

#ifdef CK_F_STACK_PUSH_MPNC
	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_stack_init(&stack);

		s = rdtsc();
		for (j = 0; j < ENTRIES; j++)
			ck_stack_push_mpnc(&stack, entry + j);
		e = rdtsc();

		a += e - s;
	}
	printf("ck_stack_push_mpnc: %16" PRIu64 "\n", a / STEPS / ENTRIES);
#endif /* CK_F_STACK_PUSH_MPNC */

#if defined(CK_F_STACK_PUSH_UPMC) && defined(CK_F_STACK_POP_UPMC)
	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_stack_init(&stack);

		for (j = 0; j < ENTRIES; j++)
			ck_stack_push_upmc(&stack, entry + j);

		s = rdtsc();
		for (j = 0; j < ENTRIES; j++)
			r = ck_stack_pop_upmc(&stack);
		e = rdtsc();
		a += e - s;
	}
	printf(" ck_stack_pop_upmc: %16" PRIu64 "\n", a / STEPS / (sizeof(entry) / sizeof(*entry)));
#endif /* CK_F_STACK_PUSH_UPMC && CK_F_STACK_POP_UPMC */

#if defined(CK_F_STACK_POP_MPMC) && defined(CK_F_STACK_PUSH_MPMC)
	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_stack_init(&stack);

		for (j = 0; j < ENTRIES; j++)
			ck_stack_push_mpmc(&stack, entry + j);

		s = rdtsc();
		for (j = 0; j < ENTRIES; j++)
			r = ck_stack_pop_mpmc(&stack);
		e = rdtsc();
		a += e - s;
	}
	printf(" ck_stack_pop_mpmc: %16" PRIu64 "\n", a / STEPS / (sizeof(entry) / sizeof(*entry)));
	r++;
#endif

	return 0;
}