ck/regressions/ck_fifo/benchmark/latency.c

#include <ck_fifo.h>
#include <ck_spinlock.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>

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

#ifndef ENTRIES
#define ENTRIES 1024
#endif

#ifndef STEPS
#define STEPS 4000
#endif

int
main(void)
{
	ck_spinlock_fas_t mutex = CK_SPINLOCK_FAS_INITIALIZER;
	void *r;
	uint64_t s, e, a;
	unsigned int i;
	unsigned int j;

#if   defined(CK_F_FIFO_SPSC)
	ck_fifo_spsc_t spsc_fifo;
	ck_fifo_spsc_entry_t spsc_entry[4096];
	ck_fifo_spsc_entry_t spsc_stub;
#endif

#if defined(CK_F_FIFO_MPMC)
	ck_fifo_mpmc_t mpmc_fifo;
	ck_fifo_mpmc_entry_t mpmc_entry[4096];
	ck_fifo_mpmc_entry_t mpmc_stub;
#endif

#ifdef CK_F_FIFO_SPSC
	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_fifo_spsc_init(&spsc_fifo, &spsc_stub);

		s = rdtsc();
		for (j = 0; j < sizeof(spsc_entry) / sizeof(*spsc_entry); j++) {
			ck_spinlock_fas_lock(&mutex);
			ck_fifo_spsc_enqueue(&spsc_fifo, spsc_entry + j, NULL);
			ck_spinlock_fas_unlock(&mutex);
		}
		e = rdtsc();

		a += e - s;
	}
	printf("    spinlock_enqueue: %16" PRIu64 "\n", a / STEPS / (sizeof(spsc_entry) / sizeof(*spsc_entry)));

	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_fifo_spsc_init(&spsc_fifo, &spsc_stub);
		for (j = 0; j < sizeof(spsc_entry) / sizeof(*spsc_entry); j++)
			ck_fifo_spsc_enqueue(&spsc_fifo, spsc_entry + j, NULL);

		s = rdtsc();
		for (j = 0; j < sizeof(spsc_entry) / sizeof(*spsc_entry); j++) {
			ck_spinlock_fas_lock(&mutex);
			ck_fifo_spsc_dequeue(&spsc_fifo, &r);
			ck_spinlock_fas_unlock(&mutex);
		}
		e = rdtsc();
		a += e - s;
	}
	printf("    spinlock_dequeue: %16" PRIu64 "\n", a / STEPS / (sizeof(spsc_entry) / sizeof(*spsc_entry)));

	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_fifo_spsc_init(&spsc_fifo, &spsc_stub);

		s = rdtsc();
		for (j = 0; j < sizeof(spsc_entry) / sizeof(*spsc_entry); j++)
			ck_fifo_spsc_enqueue(&spsc_fifo, spsc_entry + j, NULL);
		e = rdtsc();

		a += e - s;
	}
	printf("ck_fifo_spsc_enqueue: %16" PRIu64 "\n", a / STEPS / (sizeof(spsc_entry) / sizeof(*spsc_entry)));

	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_fifo_spsc_init(&spsc_fifo, &spsc_stub);
		for (j = 0; j < sizeof(spsc_entry) / sizeof(*spsc_entry); j++)
			ck_fifo_spsc_enqueue(&spsc_fifo, spsc_entry + j, NULL);

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

#ifdef CK_F_FIFO_MPMC
	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_fifo_mpmc_init(&mpmc_fifo, &mpmc_stub);

		s = rdtsc();
		for (j = 0; j < sizeof(mpmc_entry) / sizeof(*mpmc_entry); j++)
			ck_fifo_mpmc_enqueue(&mpmc_fifo, mpmc_entry + j, NULL);
		e = rdtsc();

		a += e - s;
	}
	printf("ck_fifo_mpmc_enqueue: %16" PRIu64 "\n", a / STEPS / (sizeof(mpmc_entry) / sizeof(*mpmc_entry)));

	a = 0;
	for (i = 0; i < STEPS; i++) {
		ck_fifo_mpmc_init(&mpmc_fifo, &mpmc_stub);
		for (j = 0; j < sizeof(mpmc_entry) / sizeof(*mpmc_entry); j++)
			ck_fifo_mpmc_enqueue(&mpmc_fifo, mpmc_entry + j, NULL);

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

	return 0;
}