[urcu.git] / tests / test_urcu_lfq.c

/*
 * test_urcu_lfq.c
 *
 * Userspace RCU library - example RCU-based lock-free queue
 *
 * Copyright February 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 * Copyright February 2010 - Paolo Bonzini <pbonzini@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#define _GNU_SOURCE
#include "../config.h"
#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdio.h>
#include <assert.h>
#include <sched.h>
#include <errno.h>

#include <urcu/arch.h>

#ifdef __linux__
#include <syscall.h>
#endif

/* hardcoded number of CPUs */
#define NR_CPUS 16384

#if defined(_syscall0)
_syscall0(pid_t, gettid)
#elif defined(__NR_gettid)
static inline pid_t gettid(void)
{
	return syscall(__NR_gettid);
}
#else
#warning "use pid as tid"
static inline pid_t gettid(void)
{
	return getpid();
}
#endif

#ifndef DYNAMIC_LINK_TEST
#define _LGPL_SOURCE
#endif
#include <urcu.h>
#include <urcu/cds.h>

static volatile int test_go, test_stop;

static unsigned long rduration;

static unsigned long duration;

/* read-side C.S. duration, in loops */
static unsigned long wdelay;

static inline void loop_sleep(unsigned long l)
{
	while(l-- != 0)
		caa_cpu_relax();
}

static int verbose_mode;

#define printf_verbose(fmt, args...)		\
	do {					\
		if (verbose_mode)		\
			printf(fmt, args);	\
	} while (0)

static unsigned int cpu_affinities[NR_CPUS];
static unsigned int next_aff = 0;
static int use_affinity = 0;

pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;

#ifndef HAVE_CPU_SET_T
typedef unsigned long cpu_set_t;
# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
#endif

static void set_affinity(void)
{
	cpu_set_t mask;
	int cpu;
	int ret;

	if (!use_affinity)
		return;

#if HAVE_SCHED_SETAFFINITY
	ret = pthread_mutex_lock(&affinity_mutex);
	if (ret) {
		perror("Error in pthread mutex lock");
		exit(-1);
	}
	cpu = cpu_affinities[next_aff++];
	ret = pthread_mutex_unlock(&affinity_mutex);
	if (ret) {
		perror("Error in pthread mutex unlock");
		exit(-1);
	}

	CPU_ZERO(&mask);
	CPU_SET(cpu, &mask);
#if SCHED_SETAFFINITY_ARGS == 2
	sched_setaffinity(0, &mask);
#else
	sched_setaffinity(0, sizeof(mask), &mask);
#endif
#endif /* HAVE_SCHED_SETAFFINITY */
}

/*
 * returns 0 if test should end.
 */
static int test_duration_dequeue(void)
{
	return !test_stop;
}

static int test_duration_enqueue(void)
{
	return !test_stop;
}

static unsigned long long __thread nr_dequeues;
static unsigned long long __thread nr_enqueues;

static unsigned long long __thread nr_successful_dequeues;
static unsigned long long __thread nr_successful_enqueues;

static unsigned int nr_enqueuers;
static unsigned int nr_dequeuers;

static struct cds_lfq_queue_rcu q;

void *thr_enqueuer(void *_count)
{
	unsigned long long *count = _count;

	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
			"enqueuer", pthread_self(), (unsigned long)gettid());

	set_affinity();

	rcu_register_thread();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		struct cds_lfq_node_rcu *node = malloc(sizeof(*node));
		if (!node)
			goto fail;
		cds_lfq_node_init_rcu(node);
		rcu_read_lock();
		cds_lfq_enqueue_rcu(&q, node);
		rcu_read_unlock();
		nr_successful_enqueues++;

		if (unlikely(wdelay))
			loop_sleep(wdelay);
fail:
		nr_enqueues++;
		if (unlikely(!test_duration_enqueue()))
			break;
	}

	rcu_unregister_thread();

	count[0] = nr_enqueues;
	count[1] = nr_successful_enqueues;
	printf_verbose("enqueuer thread_end, thread id : %lx, tid %lu, "
		       "enqueues %llu successful_enqueues %llu\n",
		       pthread_self(), (unsigned long)gettid(), nr_enqueues,
		       nr_successful_enqueues);
	return ((void*)1);

}

static void rcu_free_node(struct rcu_head *head)
{
	struct cds_lfq_node_rcu *node =
		caa_container_of(head, struct cds_lfq_node_rcu, rcu_head);
	free(node);
}

static void ref_release_node(struct urcu_ref *ref)
{
	struct cds_lfq_node_rcu *node =
		caa_container_of(ref, struct cds_lfq_node_rcu, ref);
	call_rcu(&node->rcu_head, rcu_free_node);
}

void *thr_dequeuer(void *_count)
{
	unsigned long long *count = _count;
	int ret;

	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
			"dequeuer", pthread_self(), (unsigned long)gettid());

	set_affinity();

	rcu_register_thread();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		struct cds_lfq_node_rcu *node;

		rcu_read_lock();
		node = cds_lfq_dequeue_rcu(&q);
		rcu_read_unlock();

		if (node) {
			urcu_ref_put(&node->ref, ref_release_node);
			nr_successful_dequeues++;
		}

		nr_dequeues++;
		if (unlikely(!test_duration_dequeue()))
			break;
		if (unlikely(rduration))
			loop_sleep(rduration);
	}

	rcu_unregister_thread();
	printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
		       "dequeues %llu, successful_dequeues %llu\n",
		       pthread_self(), (unsigned long)gettid(), nr_dequeues,
		       nr_successful_dequeues);
	count[0] = nr_dequeues;
	count[1] = nr_successful_dequeues;
	return ((void*)2);
}

static void release_node(struct urcu_ref *ref)
{
	struct cds_lfq_node_rcu *node = caa_container_of(ref, struct cds_lfq_node_rcu, ref);
	free(node);
}

void test_end(struct cds_lfq_queue_rcu *q, unsigned long long *nr_dequeues)
{
	struct cds_lfq_node_rcu *node;

	do {
		rcu_read_lock();
		node = cds_lfq_dequeue_rcu(q);
		rcu_read_unlock();
		if (node) {
			urcu_ref_put(&node->ref, release_node);
			(*nr_dequeues)++;
		}
	} while (node);
}

void show_usage(int argc, char **argv)
{
	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s)", argv[0]);
	printf(" [-d delay] (enqueuer period (in loops))");
	printf(" [-c duration] (dequeuer period (in loops))");
	printf(" [-v] (verbose output)");
	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	printf("\n");
}

int main(int argc, char **argv)
{
	int err;
	pthread_t *tid_enqueuer, *tid_dequeuer;
	void *tret;
	unsigned long long *count_enqueuer, *count_dequeuer;
	unsigned long long tot_enqueues = 0, tot_dequeues = 0;
	unsigned long long tot_successful_enqueues = 0,
			   tot_successful_dequeues = 0;
	unsigned long long end_dequeues = 0;
	int i, a;

	if (argc < 4) {
		show_usage(argc, argv);
		return -1;
	}

	err = sscanf(argv[1], "%u", &nr_dequeuers);
	if (err != 1) {
		show_usage(argc, argv);
		return -1;
	}

	err = sscanf(argv[2], "%u", &nr_enqueuers);
	if (err != 1) {
		show_usage(argc, argv);
		return -1;
	}
	
	err = sscanf(argv[3], "%lu", &duration);
	if (err != 1) {
		show_usage(argc, argv);
		return -1;
	}

	for (i = 4; i < argc; i++) {
		if (argv[i][0] != '-')
			continue;
		switch (argv[i][1]) {
		case 'a':
			if (argc < i + 2) {
				show_usage(argc, argv);
				return -1;
			}
			a = atoi(argv[++i]);
			cpu_affinities[next_aff++] = a;
			use_affinity = 1;
			printf_verbose("Adding CPU %d affinity\n", a);
			break;
		case 'c':
			if (argc < i + 2) {
				show_usage(argc, argv);
				return -1;
			}
			rduration = atol(argv[++i]);
			break;
		case 'd':
			if (argc < i + 2) {
				show_usage(argc, argv);
				return -1;
			}
			wdelay = atol(argv[++i]);
			break;
		case 'v':
			verbose_mode = 1;
			break;
		}
	}

	printf_verbose("running test for %lu seconds, %u enqueuers, "
		       "%u dequeuers.\n",
		       duration, nr_enqueuers, nr_dequeuers);
	printf_verbose("Writer delay : %lu loops.\n", rduration);
	printf_verbose("Reader duration : %lu loops.\n", wdelay);
	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
			"main", pthread_self(), (unsigned long)gettid());

	tid_enqueuer = malloc(sizeof(*tid_enqueuer) * nr_enqueuers);
	tid_dequeuer = malloc(sizeof(*tid_dequeuer) * nr_dequeuers);
	count_enqueuer = malloc(2 * sizeof(*count_enqueuer) * nr_enqueuers);
	count_dequeuer = malloc(2 * sizeof(*count_dequeuer) * nr_dequeuers);
	cds_lfq_init_rcu(&q, ref_release_node);

	next_aff = 0;

	for (i = 0; i < nr_enqueuers; i++) {
		err = pthread_create(&tid_enqueuer[i], NULL, thr_enqueuer,
				     &count_enqueuer[2 * i]);
		if (err != 0)
			exit(1);
	}
	for (i = 0; i < nr_dequeuers; i++) {
		err = pthread_create(&tid_dequeuer[i], NULL, thr_dequeuer,
				     &count_dequeuer[2 * i]);
		if (err != 0)
			exit(1);
	}

	cmm_smp_mb();

	test_go = 1;

	for (i = 0; i < duration; i++) {
		sleep(1);
		if (verbose_mode)
			write (1, ".", 1);
	}

	test_stop = 1;

	for (i = 0; i < nr_enqueuers; i++) {
		err = pthread_join(tid_enqueuer[i], &tret);
		if (err != 0)
			exit(1);
		tot_enqueues += count_enqueuer[2 * i];
		tot_successful_enqueues += count_enqueuer[2 * i + 1];
	}
	for (i = 0; i < nr_dequeuers; i++) {
		err = pthread_join(tid_dequeuer[i], &tret);
		if (err != 0)
			exit(1);
		tot_dequeues += count_dequeuer[2 * i];
		tot_successful_dequeues += count_dequeuer[2 * i + 1];
	}
	
	test_end(&q, &end_dequeues);

	printf_verbose("total number of enqueues : %llu, dequeues %llu\n",
		       tot_enqueues, tot_dequeues);
	printf_verbose("total number of successful enqueues : %llu, "
		       "successful dequeues %llu\n",
		       tot_successful_enqueues, tot_successful_dequeues);
	printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu "
		"nr_dequeuers %3u "
		"rdur %6lu nr_enqueues %12llu nr_dequeues %12llu "
		"successful enqueues %12llu successful dequeues %12llu "
		"end_dequeues %llu nr_ops %12llu\n",
		argv[0], duration, nr_enqueuers, wdelay,
		nr_dequeuers, rduration, tot_enqueues, tot_dequeues,
		tot_successful_enqueues,
		tot_successful_dequeues, end_dequeues,
		tot_enqueues + tot_dequeues);
	if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues)
		printf("WARNING! Discrepancy between nr succ. enqueues %llu vs "
		       "succ. dequeues + end dequeues %llu.\n",
		       tot_successful_enqueues,
		       tot_successful_dequeues + end_dequeues);

	free(count_enqueuer);
	free(count_dequeuer);
	free(tid_enqueuer);
	free(tid_dequeuer);
	return 0;
}
Commit	Line	Data
453629a9 MD	1	/*
	2	* test_urcu_lfq.c
	3	*
	4	* Userspace RCU library - example RCU-based lock-free queue
	5	*
	6	* Copyright February 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	7	* Copyright February 2010 - Paolo Bonzini <pbonzini@redhat.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write to the Free Software Foundation, Inc.,
	21	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	22	*/
	23
	24	#define _GNU_SOURCE
	25	#include "../config.h"
	26	#include <stdio.h>
	27	#include <pthread.h>
	28	#include <stdlib.h>
	29	#include <stdint.h>
	30	#include <stdbool.h>
	31	#include <string.h>
	32	#include <sys/types.h>
	33	#include <sys/wait.h>
	34	#include <unistd.h>
	35	#include <stdio.h>
	36	#include <assert.h>
453629a9 MD	37	#include <sched.h>
	38	#include <errno.h>
	39
	40	#include <urcu/arch.h>
	41
65fcc7e9 MD	42	#ifdef __linux__
	43	#include <syscall.h>
	44	#endif
	45
453629a9 MD	46	/* hardcoded number of CPUs */
	47	#define NR_CPUS 16384
	48
	49	#if defined(_syscall0)
	50	_syscall0(pid_t, gettid)
	51	#elif defined(__NR_gettid)
	52	static inline pid_t gettid(void)
	53	{
	54	return syscall(__NR_gettid);
	55	}
	56	#else
	57	#warning "use pid as tid"
	58	static inline pid_t gettid(void)
	59	{
	60	return getpid();
	61	}
	62	#endif
	63
	64	#ifndef DYNAMIC_LINK_TEST
	65	#define _LGPL_SOURCE
	66	#endif
	67	#include <urcu.h>
e5a7d709	68	#include <urcu/cds.h>
453629a9 MD	69
	70	static volatile int test_go, test_stop;
	71
	72	static unsigned long rduration;
	73
	74	static unsigned long duration;
	75
	76	/* read-side C.S. duration, in loops */
	77	static unsigned long wdelay;
	78
	79	static inline void loop_sleep(unsigned long l)
	80	{
	81	while(l-- != 0)
06f22bdb	82	caa_cpu_relax();
453629a9 MD	83	}
	84
	85	static int verbose_mode;
	86
	87	#define printf_verbose(fmt, args...) \
	88	do { \
	89	if (verbose_mode) \
	90	printf(fmt, args); \
	91	} while (0)
	92
	93	static unsigned int cpu_affinities[NR_CPUS];
	94	static unsigned int next_aff = 0;
	95	static int use_affinity = 0;
	96
	97	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	98
	99	#ifndef HAVE_CPU_SET_T
	100	typedef unsigned long cpu_set_t;
	101	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	102	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	103	#endif
	104
	105	static void set_affinity(void)
	106	{
	107	cpu_set_t mask;
	108	int cpu;
	109	int ret;
	110
	111	if (!use_affinity)
	112	return;
	113
	114	#if HAVE_SCHED_SETAFFINITY
	115	ret = pthread_mutex_lock(&affinity_mutex);
	116	if (ret) {
	117	perror("Error in pthread mutex lock");
	118	exit(-1);
	119	}
	120	cpu = cpu_affinities[next_aff++];
	121	ret = pthread_mutex_unlock(&affinity_mutex);
	122	if (ret) {
	123	perror("Error in pthread mutex unlock");
	124	exit(-1);
	125	}
	126
	127	CPU_ZERO(&mask);
	128	CPU_SET(cpu, &mask);
	129	#if SCHED_SETAFFINITY_ARGS == 2
	130	sched_setaffinity(0, &mask);
	131	#else
	132	sched_setaffinity(0, sizeof(mask), &mask);
	133	#endif
	134	#endif /* HAVE_SCHED_SETAFFINITY */
	135	}
	136
	137	/*
	138	* returns 0 if test should end.
	139	*/
	140	static int test_duration_dequeue(void)
	141	{
	142	return !test_stop;
	143	}
	144
	145	static int test_duration_enqueue(void)
	146	{
147	return !test_stop;
148	}
149
150	static unsigned long long __thread nr_dequeues;
151	static unsigned long long __thread nr_enqueues;
152
153	static unsigned long long __thread nr_successful_dequeues;
154	static unsigned long long __thread nr_successful_enqueues;
155
156	static unsigned int nr_enqueuers;
157	static unsigned int nr_dequeuers;
158
16aa9ee8	159	static struct cds_lfq_queue_rcu q;
453629a9 MD	160
	161	void thr_enqueuer(void _count)
	162	{
	163	unsigned long long *count = _count;
	164
	165	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	166	"enqueuer", pthread_self(), (unsigned long)gettid());
	167
	168	set_affinity();
	169
	170	rcu_register_thread();
	171
	172	while (!test_go)
	173	{
	174	}
5481ddb3	175	cmm_smp_mb();
453629a9 MD	176
453629a9 MD	177	for (;;) {
16aa9ee8	178	struct cds_lfq_node_rcu node = malloc(sizeof(node));
453629a9 MD	179	if (!node)
453629a9 MD	180	goto fail;
16aa9ee8	181	cds_lfq_node_init_rcu(node);
d9b52143	182	rcu_read_lock();
16aa9ee8	183	cds_lfq_enqueue_rcu(&q, node);
d9b52143	184	rcu_read_unlock();
453629a9 MD	185	nr_successful_enqueues++;
	186
	187	if (unlikely(wdelay))
	188	loop_sleep(wdelay);
	189	fail:
	190	nr_enqueues++;
	191	if (unlikely(!test_duration_enqueue()))
	192	break;
	193	}
	194
	195	rcu_unregister_thread();
	196
	197	count[0] = nr_enqueues;
	198	count[1] = nr_successful_enqueues;
	199	printf_verbose("enqueuer thread_end, thread id : %lx, tid %lu, "
	200	"enqueues %llu successful_enqueues %llu\n",
	201	pthread_self(), (unsigned long)gettid(), nr_enqueues,
	202	nr_successful_enqueues);
	203	return ((void*)1);
	204
	205	}
	206
d9b52143	207	static void rcu_free_node(struct rcu_head *head)
453629a9	208	{
d9b52143 MD	209	struct cds_lfq_node_rcu *node =
	210	caa_container_of(head, struct cds_lfq_node_rcu, rcu_head);
	211	free(node);
	212	}
	213
	214	static void ref_release_node(struct urcu_ref *ref)
	215	{
	216	struct cds_lfq_node_rcu *node =
	217	caa_container_of(ref, struct cds_lfq_node_rcu, ref);
	218	call_rcu(&node->rcu_head, rcu_free_node);
453629a9 MD	219	}
	220
	221	void thr_dequeuer(void _count)
	222	{
	223	unsigned long long *count = _count;
9bfaf0ca	224	int ret;
453629a9 MD	225
	226	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	227	"dequeuer", pthread_self(), (unsigned long)gettid());
	228
	229	set_affinity();
	230
453629a9 MD	231	rcu_register_thread();
	232
	233	while (!test_go)
	234	{
	235	}
5481ddb3	236	cmm_smp_mb();
453629a9 MD	237
453629a9 MD	238	for (;;) {
d9b52143 MD	239	struct cds_lfq_node_rcu *node;
	240
	241	rcu_read_lock();
	242	node = cds_lfq_dequeue_rcu(&q);
	243	rcu_read_unlock();
453629a9 MD	244
453629a9 MD	245	if (node) {
d9b52143	246	urcu_ref_put(&node->ref, ref_release_node);
453629a9 MD	247	nr_successful_dequeues++;
	248	}
	249
	250	nr_dequeues++;
	251	if (unlikely(!test_duration_dequeue()))
	252	break;
	253	if (unlikely(rduration))
	254	loop_sleep(rduration);
	255	}
	256
	257	rcu_unregister_thread();
453629a9 MD	258	printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
	259	"dequeues %llu, successful_dequeues %llu\n",
	260	pthread_self(), (unsigned long)gettid(), nr_dequeues,
	261	nr_successful_dequeues);
	262	count[0] = nr_dequeues;
	263	count[1] = nr_successful_dequeues;
	264	return ((void*)2);
	265	}
	266
	267	static void release_node(struct urcu_ref *ref)
	268	{
16aa9ee8	269	struct cds_lfq_node_rcu *node = caa_container_of(ref, struct cds_lfq_node_rcu, ref);
453629a9 MD	270	free(node);
	271	}
	272
16aa9ee8	273	void test_end(struct cds_lfq_queue_rcu q, unsigned long long nr_dequeues)
453629a9	274	{
16aa9ee8	275	struct cds_lfq_node_rcu *node;
453629a9 MD	276
453629a9 MD	277	do {
d9b52143 MD	278	rcu_read_lock();
	279	node = cds_lfq_dequeue_rcu(q);
	280	rcu_read_unlock();
453629a9 MD	281	if (node) {
	282	urcu_ref_put(&node->ref, release_node);
	283	(*nr_dequeues)++;
	284	}
	285	} while (node);
	286	}
	287
	288	void show_usage(int argc, char **argv)
	289	{
	290	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s)", argv[0]);
	291	printf(" [-d delay] (enqueuer period (in loops))");
	292	printf(" [-c duration] (dequeuer period (in loops))");
	293	printf(" [-v] (verbose output)");
	294	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	295	printf("\n");
	296	}
	297
	298	int main(int argc, char **argv)
	299	{
	300	int err;
	301	pthread_t tid_enqueuer, tid_dequeuer;
	302	void *tret;
	303	unsigned long long count_enqueuer, count_dequeuer;
	304	unsigned long long tot_enqueues = 0, tot_dequeues = 0;
	305	unsigned long long tot_successful_enqueues = 0,
	306	tot_successful_dequeues = 0;
	307	unsigned long long end_dequeues = 0;
	308	int i, a;
	309
	310	if (argc < 4) {
	311	show_usage(argc, argv);
	312	return -1;
	313	}
	314
	315	err = sscanf(argv[1], "%u", &nr_dequeuers);
	316	if (err != 1) {
	317	show_usage(argc, argv);
	318	return -1;
	319	}
	320
	321	err = sscanf(argv[2], "%u", &nr_enqueuers);
	322	if (err != 1) {
	323	show_usage(argc, argv);
	324	return -1;
	325	}
	326
	327	err = sscanf(argv[3], "%lu", &duration);
	328	if (err != 1) {
	329	show_usage(argc, argv);
	330	return -1;
	331	}
	332
	333	for (i = 4; i < argc; i++) {
	334	if (argv[i][0] != '-')
	335	continue;
	336	switch (argv[i][1]) {
	337	case 'a':
	338	if (argc < i + 2) {
	339	show_usage(argc, argv);
	340	return -1;
	341	}
	342	a = atoi(argv[++i]);
	343	cpu_affinities[next_aff++] = a;
	344	use_affinity = 1;
345	printf_verbose("Adding CPU %d affinity\n", a);
346	break;
347	case 'c':
348	if (argc < i + 2) {
349	show_usage(argc, argv);
350	return -1;
351	}
352	rduration = atol(argv[++i]);
353	break;
354	case 'd':
355	if (argc < i + 2) {
356	show_usage(argc, argv);
357	return -1;
358	}
359	wdelay = atol(argv[++i]);
360	break;
361	case 'v':
362	verbose_mode = 1;
363	break;
364	}
365	}
366
367	printf_verbose("running test for %lu seconds, %u enqueuers, "
368	"%u dequeuers.\n",
369	duration, nr_enqueuers, nr_dequeuers);
370	printf_verbose("Writer delay : %lu loops.\n", rduration);
371	printf_verbose("Reader duration : %lu loops.\n", wdelay);
372	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
373	"main", pthread_self(), (unsigned long)gettid());
374
375	tid_enqueuer = malloc(sizeof(tid_enqueuer) nr_enqueuers);
376	tid_dequeuer = malloc(sizeof(tid_dequeuer) nr_dequeuers);
377	count_enqueuer = malloc(2 * sizeof(count_enqueuer) nr_enqueuers);
378	count_dequeuer = malloc(2 * sizeof(count_dequeuer) nr_dequeuers);
d9b52143	379	cds_lfq_init_rcu(&q, ref_release_node);
453629a9 MD	380
	381	next_aff = 0;
	382
	383	for (i = 0; i < nr_enqueuers; i++) {
	384	err = pthread_create(&tid_enqueuer[i], NULL, thr_enqueuer,
	385	&count_enqueuer[2 * i]);
	386	if (err != 0)
	387	exit(1);
	388	}
	389	for (i = 0; i < nr_dequeuers; i++) {
	390	err = pthread_create(&tid_dequeuer[i], NULL, thr_dequeuer,
	391	&count_dequeuer[2 * i]);
	392	if (err != 0)
	393	exit(1);
	394	}
	395
5481ddb3	396	cmm_smp_mb();
453629a9 MD	397
	398	test_go = 1;
	399
	400	for (i = 0; i < duration; i++) {
	401	sleep(1);
	402	if (verbose_mode)
	403	write (1, ".", 1);
	404	}
	405
	406	test_stop = 1;
	407
	408	for (i = 0; i < nr_enqueuers; i++) {
	409	err = pthread_join(tid_enqueuer[i], &tret);
	410	if (err != 0)
	411	exit(1);
	412	tot_enqueues += count_enqueuer[2 * i];
	413	tot_successful_enqueues += count_enqueuer[2 * i + 1];
	414	}
	415	for (i = 0; i < nr_dequeuers; i++) {
	416	err = pthread_join(tid_dequeuer[i], &tret);
	417	if (err != 0)
	418	exit(1);
	419	tot_dequeues += count_dequeuer[2 * i];
	420	tot_successful_dequeues += count_dequeuer[2 * i + 1];
	421	}
	422
	423	test_end(&q, &end_dequeues);
	424
	425	printf_verbose("total number of enqueues : %llu, dequeues %llu\n",
	426	tot_enqueues, tot_dequeues);
	427	printf_verbose("total number of successful enqueues : %llu, "
	428	"successful dequeues %llu\n",
	429	tot_successful_enqueues, tot_successful_dequeues);
	430	printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu "
	431	"nr_dequeuers %3u "
	432	"rdur %6lu nr_enqueues %12llu nr_dequeues %12llu "
	433	"successful enqueues %12llu successful dequeues %12llu "
	434	"end_dequeues %llu nr_ops %12llu\n",
	435	argv[0], duration, nr_enqueuers, wdelay,
	436	nr_dequeuers, rduration, tot_enqueues, tot_dequeues,
	437	tot_successful_enqueues,
	438	tot_successful_dequeues, end_dequeues,
	439	tot_enqueues + tot_dequeues);
	440	if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues)
	441	printf("WARNING! Discrepancy between nr succ. enqueues %llu vs "
	442	"succ. dequeues + end dequeues %llu.\n",
	443	tot_successful_enqueues,
	444	tot_successful_dequeues + end_dequeues);
	445
	446	free(count_enqueuer);
	447	free(count_dequeuer);
	448	free(tid_enqueuer);
	449	free(tid_dequeuer);
	450	return 0;
	451	}