[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>
#include <urcu/tls-compat.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>
#include <urcu-defer.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 DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);

static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);

static unsigned int nr_enqueuers;
static unsigned int nr_dequeuers;

struct test {
	struct cds_lfq_node_rcu list;
	struct rcu_head rcu;
};

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 test *node = malloc(sizeof(*node));
		if (!node)
			goto fail;
		cds_lfq_node_init_rcu(&node->list);
		rcu_read_lock();
		cds_lfq_enqueue_rcu(&q, &node->list);
		rcu_read_unlock();
		URCU_TLS(nr_successful_enqueues)++;

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

	rcu_unregister_thread();

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

}

static
void free_node_cb(struct rcu_head *head)
{
	struct test *node =
		caa_container_of(head, struct test, 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();

	ret = rcu_defer_register_thread();
	if (ret) {
		printf("Error in rcu_defer_register_thread\n");
		exit(-1);
	}
	rcu_register_thread();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		struct cds_lfq_node_rcu *qnode;
		struct test *node;

		rcu_read_lock();
		qnode = cds_lfq_dequeue_rcu(&q);
		node = caa_container_of(qnode, struct test, list);
		rcu_read_unlock();

		if (node) {
			call_rcu(&node->rcu, free_node_cb);
			URCU_TLS(nr_successful_dequeues)++;
		}

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

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

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

	do {
		snode = cds_lfq_dequeue_rcu(q);
		if (snode) {
			struct test *node;

			node = caa_container_of(snode, struct test, list);
			free(node);	/* no more concurrent access */
			(*nr_dequeues)++;
		}
	} while (snode);
}

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, call_rcu);
	err = create_all_cpu_call_rcu_data(0);
	if (err) {
		printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
	}

	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);
	err = cds_lfq_destroy_rcu(&q);
	assert(!err);

	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_all_cpu_call_rcu_data();
	free(count_enqueuer);
	free(count_dequeuer);
	free(tid_enqueuer);
	free(tid_dequeuer);
	return 0;
}
Commit	Line	Data
	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>
	37	#include <sched.h>
	38	#include <errno.h>
	39
	40	#include <urcu/arch.h>
	41	#include <urcu/tls-compat.h>
	42
	43	#ifdef __linux__
	44	#include <syscall.h>
	45	#endif
	46
	47	/* hardcoded number of CPUs */
	48	#define NR_CPUS 16384
	49
	50	#if defined(_syscall0)
	51	_syscall0(pid_t, gettid)
	52	#elif defined(__NR_gettid)
	53	static inline pid_t gettid(void)
	54	{
	55	return syscall(__NR_gettid);
	56	}
	57	#else
	58	#warning "use pid as tid"
	59	static inline pid_t gettid(void)
	60	{
	61	return getpid();
	62	}
	63	#endif
	64
	65	#ifndef DYNAMIC_LINK_TEST
	66	#define _LGPL_SOURCE
	67	#endif
	68	#include <urcu.h>
	69	#include <urcu/cds.h>
	70	#include <urcu-defer.h>
	71
	72	static volatile int test_go, test_stop;
	73
	74	static unsigned long rduration;
	75
	76	static unsigned long duration;
	77
	78	/* read-side C.S. duration, in loops */
	79	static unsigned long wdelay;
	80
	81	static inline void loop_sleep(unsigned long l)
	82	{
	83	while(l-- != 0)
	84	caa_cpu_relax();
	85	}
	86
	87	static int verbose_mode;
	88
	89	#define printf_verbose(fmt, args...) \
	90	do { \
	91	if (verbose_mode) \
	92	printf(fmt, args); \
	93	} while (0)
	94
	95	static unsigned int cpu_affinities[NR_CPUS];
	96	static unsigned int next_aff = 0;
	97	static int use_affinity = 0;
	98
	99	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	100
	101	#ifndef HAVE_CPU_SET_T
	102	typedef unsigned long cpu_set_t;
	103	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	104	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	105	#endif
	106
	107	static void set_affinity(void)
	108	{
	109	cpu_set_t mask;
	110	int cpu;
	111	int ret;
	112
	113	if (!use_affinity)
	114	return;
	115
	116	#if HAVE_SCHED_SETAFFINITY
	117	ret = pthread_mutex_lock(&affinity_mutex);
	118	if (ret) {
	119	perror("Error in pthread mutex lock");
	120	exit(-1);
	121	}
	122	cpu = cpu_affinities[next_aff++];
	123	ret = pthread_mutex_unlock(&affinity_mutex);
	124	if (ret) {
	125	perror("Error in pthread mutex unlock");
	126	exit(-1);
	127	}
	128
	129	CPU_ZERO(&mask);
	130	CPU_SET(cpu, &mask);
	131	#if SCHED_SETAFFINITY_ARGS == 2
	132	sched_setaffinity(0, &mask);
	133	#else
	134	sched_setaffinity(0, sizeof(mask), &mask);
	135	#endif
	136	#endif /* HAVE_SCHED_SETAFFINITY */
	137	}
	138
	139	/*
	140	* returns 0 if test should end.
	141	*/
	142	static int test_duration_dequeue(void)
	143	{
	144	return !test_stop;
	145	}
	146
	147	static int test_duration_enqueue(void)
	148	{
	149	return !test_stop;
	150	}
	151
	152	static DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
	153	static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);
	154
	155	static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
	156	static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);
	157
	158	static unsigned int nr_enqueuers;
	159	static unsigned int nr_dequeuers;
	160
	161	struct test {
	162	struct cds_lfq_node_rcu list;
	163	struct rcu_head rcu;
	164	};
	165
	166	static struct cds_lfq_queue_rcu q;
	167
	168	void thr_enqueuer(void _count)
	169	{
	170	unsigned long long *count = _count;
	171
	172	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	173	"enqueuer", pthread_self(), (unsigned long)gettid());
	174
	175	set_affinity();
	176
	177	rcu_register_thread();
	178
	179	while (!test_go)
	180	{
	181	}
	182	cmm_smp_mb();
	183
	184	for (;;) {
	185	struct test node = malloc(sizeof(node));
	186	if (!node)
	187	goto fail;
	188	cds_lfq_node_init_rcu(&node->list);
	189	rcu_read_lock();
	190	cds_lfq_enqueue_rcu(&q, &node->list);
	191	rcu_read_unlock();
	192	URCU_TLS(nr_successful_enqueues)++;
	193
	194	if (caa_unlikely(wdelay))
	195	loop_sleep(wdelay);
	196	fail:
	197	URCU_TLS(nr_enqueues)++;
	198	if (caa_unlikely(!test_duration_enqueue()))
	199	break;
	200	}
	201
	202	rcu_unregister_thread();
	203
	204	count[0] = URCU_TLS(nr_enqueues);
	205	count[1] = URCU_TLS(nr_successful_enqueues);
	206	printf_verbose("enqueuer thread_end, thread id : %lx, tid %lu, "
	207	"enqueues %llu successful_enqueues %llu\n",
	208	pthread_self(), (unsigned long)gettid(),
	209	URCU_TLS(nr_enqueues), URCU_TLS(nr_successful_enqueues));
	210	return ((void*)1);
	211
	212	}
	213
	214	static
	215	void free_node_cb(struct rcu_head *head)
	216	{
	217	struct test *node =
	218	caa_container_of(head, struct test, rcu);
	219	free(node);
	220	}
	221
	222	void thr_dequeuer(void _count)
	223	{
	224	unsigned long long *count = _count;
	225	int ret;
	226
	227	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	228	"dequeuer", pthread_self(), (unsigned long)gettid());
	229
	230	set_affinity();
	231
	232	ret = rcu_defer_register_thread();
	233	if (ret) {
	234	printf("Error in rcu_defer_register_thread\n");
	235	exit(-1);
	236	}
	237	rcu_register_thread();
	238
	239	while (!test_go)
	240	{
	241	}
	242	cmm_smp_mb();
	243
	244	for (;;) {
	245	struct cds_lfq_node_rcu *qnode;
	246	struct test *node;
	247
	248	rcu_read_lock();
	249	qnode = cds_lfq_dequeue_rcu(&q);
	250	node = caa_container_of(qnode, struct test, list);
	251	rcu_read_unlock();
	252
	253	if (node) {
	254	call_rcu(&node->rcu, free_node_cb);
	255	URCU_TLS(nr_successful_dequeues)++;
	256	}
	257
	258	URCU_TLS(nr_dequeues)++;
	259	if (caa_unlikely(!test_duration_dequeue()))
	260	break;
	261	if (caa_unlikely(rduration))
	262	loop_sleep(rduration);
	263	}
	264
	265	rcu_unregister_thread();
	266	rcu_defer_unregister_thread();
	267	printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
	268	"dequeues %llu, successful_dequeues %llu\n",
	269	pthread_self(), (unsigned long)gettid(),
	270	URCU_TLS(nr_dequeues), URCU_TLS(nr_successful_dequeues));
	271	count[0] = URCU_TLS(nr_dequeues);
	272	count[1] = URCU_TLS(nr_successful_dequeues);
	273	return ((void*)2);
	274	}
	275
	276	void test_end(struct cds_lfq_queue_rcu q, unsigned long long nr_dequeues)
	277	{
	278	struct cds_lfq_node_rcu *snode;
	279
	280	do {
	281	snode = cds_lfq_dequeue_rcu(q);
	282	if (snode) {
	283	struct test *node;
	284
	285	node = caa_container_of(snode, struct test, list);
	286	free(node); /* no more concurrent access */
	287	(*nr_dequeues)++;
	288	}
	289	} while (snode);
	290	}
	291
	292	void show_usage(int argc, char **argv)
	293	{
	294	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s)", argv[0]);
	295	printf(" [-d delay] (enqueuer period (in loops))");
	296	printf(" [-c duration] (dequeuer period (in loops))");
	297	printf(" [-v] (verbose output)");
	298	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	299	printf("\n");
	300	}
	301
	302	int main(int argc, char **argv)
	303	{
	304	int err;
	305	pthread_t tid_enqueuer, tid_dequeuer;
	306	void *tret;
	307	unsigned long long count_enqueuer, count_dequeuer;
	308	unsigned long long tot_enqueues = 0, tot_dequeues = 0;
	309	unsigned long long tot_successful_enqueues = 0,
	310	tot_successful_dequeues = 0;
	311	unsigned long long end_dequeues = 0;
	312	int i, a;
	313
	314	if (argc < 4) {
	315	show_usage(argc, argv);
	316	return -1;
	317	}
	318
	319	err = sscanf(argv[1], "%u", &nr_dequeuers);
	320	if (err != 1) {
	321	show_usage(argc, argv);
	322	return -1;
	323	}
	324
	325	err = sscanf(argv[2], "%u", &nr_enqueuers);
	326	if (err != 1) {
	327	show_usage(argc, argv);
	328	return -1;
	329	}
	330
	331	err = sscanf(argv[3], "%lu", &duration);
	332	if (err != 1) {
	333	show_usage(argc, argv);
	334	return -1;
	335	}
	336
	337	for (i = 4; i < argc; i++) {
	338	if (argv[i][0] != '-')
	339	continue;
	340	switch (argv[i][1]) {
	341	case 'a':
	342	if (argc < i + 2) {
	343	show_usage(argc, argv);
	344	return -1;
	345	}
	346	a = atoi(argv[++i]);
	347	cpu_affinities[next_aff++] = a;
	348	use_affinity = 1;
	349	printf_verbose("Adding CPU %d affinity\n", a);
	350	break;
	351	case 'c':
	352	if (argc < i + 2) {
	353	show_usage(argc, argv);
	354	return -1;
	355	}
	356	rduration = atol(argv[++i]);
	357	break;
	358	case 'd':
	359	if (argc < i + 2) {
	360	show_usage(argc, argv);
	361	return -1;
	362	}
	363	wdelay = atol(argv[++i]);
	364	break;
	365	case 'v':
	366	verbose_mode = 1;
	367	break;
	368	}
	369	}
	370
	371	printf_verbose("running test for %lu seconds, %u enqueuers, "
	372	"%u dequeuers.\n",
	373	duration, nr_enqueuers, nr_dequeuers);
	374	printf_verbose("Writer delay : %lu loops.\n", rduration);
	375	printf_verbose("Reader duration : %lu loops.\n", wdelay);
	376	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
	377	"main", pthread_self(), (unsigned long)gettid());
	378
	379	tid_enqueuer = malloc(sizeof(tid_enqueuer) nr_enqueuers);
	380	tid_dequeuer = malloc(sizeof(tid_dequeuer) nr_dequeuers);
	381	count_enqueuer = malloc(2 * sizeof(count_enqueuer) nr_enqueuers);
	382	count_dequeuer = malloc(2 * sizeof(count_dequeuer) nr_dequeuers);
	383	cds_lfq_init_rcu(&q, call_rcu);
	384	err = create_all_cpu_call_rcu_data(0);
	385	if (err) {
	386	printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
	387	}
	388
	389	next_aff = 0;
	390
	391	for (i = 0; i < nr_enqueuers; i++) {
	392	err = pthread_create(&tid_enqueuer[i], NULL, thr_enqueuer,
	393	&count_enqueuer[2 * i]);
	394	if (err != 0)
	395	exit(1);
	396	}
	397	for (i = 0; i < nr_dequeuers; i++) {
	398	err = pthread_create(&tid_dequeuer[i], NULL, thr_dequeuer,
	399	&count_dequeuer[2 * i]);
	400	if (err != 0)
	401	exit(1);
	402	}
	403
	404	cmm_smp_mb();
	405
	406	test_go = 1;
	407
	408	for (i = 0; i < duration; i++) {
	409	sleep(1);
	410	if (verbose_mode)
	411	write (1, ".", 1);
	412	}
	413
	414	test_stop = 1;
	415
	416	for (i = 0; i < nr_enqueuers; i++) {
	417	err = pthread_join(tid_enqueuer[i], &tret);
	418	if (err != 0)
	419	exit(1);
	420	tot_enqueues += count_enqueuer[2 * i];
	421	tot_successful_enqueues += count_enqueuer[2 * i + 1];
	422	}
	423	for (i = 0; i < nr_dequeuers; i++) {
	424	err = pthread_join(tid_dequeuer[i], &tret);
	425	if (err != 0)
	426	exit(1);
	427	tot_dequeues += count_dequeuer[2 * i];
	428	tot_successful_dequeues += count_dequeuer[2 * i + 1];
	429	}
	430
	431	test_end(&q, &end_dequeues);
	432	err = cds_lfq_destroy_rcu(&q);
	433	assert(!err);
	434
	435	printf_verbose("total number of enqueues : %llu, dequeues %llu\n",
	436	tot_enqueues, tot_dequeues);
	437	printf_verbose("total number of successful enqueues : %llu, "
	438	"successful dequeues %llu\n",
	439	tot_successful_enqueues, tot_successful_dequeues);
	440	printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu "
	441	"nr_dequeuers %3u "
	442	"rdur %6lu nr_enqueues %12llu nr_dequeues %12llu "
	443	"successful enqueues %12llu successful dequeues %12llu "
	444	"end_dequeues %llu nr_ops %12llu\n",
	445	argv[0], duration, nr_enqueuers, wdelay,
	446	nr_dequeuers, rduration, tot_enqueues, tot_dequeues,
	447	tot_successful_enqueues,
	448	tot_successful_dequeues, end_dequeues,
	449	tot_enqueues + tot_dequeues);
	450	if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues)
	451	printf("WARNING! Discrepancy between nr succ. enqueues %llu vs "
	452	"succ. dequeues + end dequeues %llu.\n",
	453	tot_successful_enqueues,
	454	tot_successful_dequeues + end_dequeues);
	455
	456	free_all_cpu_call_rcu_data();
	457	free(count_enqueuer);
	458	free(count_dequeuer);
	459	free(tid_enqueuer);
	460	free(tid_dequeuer);
	461	return 0;
	462	}