[userspace-rcu.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>

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 loops)
{
	while (loops-- != 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)
{
#if HAVE_SCHED_SETAFFINITY
	cpu_set_t mask;
	int cpu, ret;
#endif /* HAVE_SCHED_SETAFFINITY */

	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", (unsigned long) 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;

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

	set_affinity();

	rcu_register_thread();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		struct cds_lfq_node_rcu *qnode;

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

		if (qnode) {
			struct test *node;

			node = caa_container_of(qnode, struct test, list);
			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();
	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", (unsigned long) 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
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>
bd252a04	41	#include <urcu/tls-compat.h>
453629a9	42
65fcc7e9 MD	43	#ifdef __linux__
	44	#include <syscall.h>
	45	#endif
	46
453629a9 MD	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>
e5a7d709	69	#include <urcu/cds.h>
453629a9 MD	70
	71	static volatile int test_go, test_stop;
	72
	73	static unsigned long rduration;
	74
	75	static unsigned long duration;
	76
	77	/* read-side C.S. duration, in loops */
	78	static unsigned long wdelay;
	79
ab0aacbe	80	static inline void loop_sleep(unsigned long loops)
453629a9	81	{
ab0aacbe	82	while (loops-- != 0)
06f22bdb	83	caa_cpu_relax();
453629a9 MD	84	}
	85
	86	static int verbose_mode;
	87
	88	#define printf_verbose(fmt, args...) \
	89	do { \
	90	if (verbose_mode) \
	91	printf(fmt, args); \
	92	} while (0)
	93
	94	static unsigned int cpu_affinities[NR_CPUS];
	95	static unsigned int next_aff = 0;
	96	static int use_affinity = 0;
	97
	98	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	99
	100	#ifndef HAVE_CPU_SET_T
	101	typedef unsigned long cpu_set_t;
	102	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	103	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	104	#endif
	105
	106	static void set_affinity(void)
	107	{
95bc7fb9	108	#if HAVE_SCHED_SETAFFINITY
453629a9	109	cpu_set_t mask;
95bc7fb9 MD	110	int cpu, ret;
95bc7fb9 MD	111	#endif /* HAVE_SCHED_SETAFFINITY */
453629a9 MD	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
bd252a04 MD	152	static DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
bd252a04 MD	153	static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);
453629a9	154
bd252a04 MD	155	static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
bd252a04 MD	156	static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);
453629a9 MD	157
	158	static unsigned int nr_enqueuers;
	159	static unsigned int nr_dequeuers;
	160
94aec122 MD	161	struct test {
	162	struct cds_lfq_node_rcu list;
	163	struct rcu_head rcu;
	164	};
	165
16aa9ee8	166	static struct cds_lfq_queue_rcu q;
453629a9 MD	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",
6ff854ac MD	173	"enqueuer", (unsigned long) pthread_self(),
6ff854ac MD	174	(unsigned long) gettid());
453629a9 MD	175
	176	set_affinity();
	177
	178	rcu_register_thread();
	179
	180	while (!test_go)
	181	{
	182	}
5481ddb3	183	cmm_smp_mb();
453629a9 MD	184
453629a9 MD	185	for (;;) {
94aec122	186	struct test node = malloc(sizeof(node));
453629a9 MD	187	if (!node)
453629a9 MD	188	goto fail;
94aec122	189	cds_lfq_node_init_rcu(&node->list);
6e5f88cf	190	rcu_read_lock();
94aec122	191	cds_lfq_enqueue_rcu(&q, &node->list);
6e5f88cf	192	rcu_read_unlock();
bd252a04	193	URCU_TLS(nr_successful_enqueues)++;
453629a9	194
a0b7f7ea	195	if (caa_unlikely(wdelay))
453629a9 MD	196	loop_sleep(wdelay);
453629a9 MD	197	fail:
bd252a04	198	URCU_TLS(nr_enqueues)++;
a0b7f7ea	199	if (caa_unlikely(!test_duration_enqueue()))
453629a9 MD	200	break;
	201	}
	202
	203	rcu_unregister_thread();
	204
bd252a04 MD	205	count[0] = URCU_TLS(nr_enqueues);
bd252a04 MD	206	count[1] = URCU_TLS(nr_successful_enqueues);
453629a9 MD	207	printf_verbose("enqueuer thread_end, thread id : %lx, tid %lu, "
453629a9 MD	208	"enqueues %llu successful_enqueues %llu\n",
6ff854ac MD	209	pthread_self(),
6ff854ac MD	210	(unsigned long) gettid(),
bd252a04	211	URCU_TLS(nr_enqueues), URCU_TLS(nr_successful_enqueues));
453629a9 MD	212	return ((void*)1);
	213
	214	}
	215
94aec122 MD	216	static
	217	void free_node_cb(struct rcu_head *head)
	218	{
	219	struct test *node =
	220	caa_container_of(head, struct test, rcu);
	221	free(node);
	222	}
	223
453629a9 MD	224	void thr_dequeuer(void _count)
	225	{
	226	unsigned long long *count = _count;
	227
	228	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
6ff854ac MD	229	"dequeuer", (unsigned long) pthread_self(),
6ff854ac MD	230	(unsigned long) gettid());
453629a9 MD	231
	232	set_affinity();
	233
453629a9 MD	234	rcu_register_thread();
	235
	236	while (!test_go)
	237	{
	238	}
5481ddb3	239	cmm_smp_mb();
453629a9 MD	240
453629a9 MD	241	for (;;) {
94aec122	242	struct cds_lfq_node_rcu *qnode;
d9b52143	243
6e5f88cf	244	rcu_read_lock();
94aec122	245	qnode = cds_lfq_dequeue_rcu(&q);
6e5f88cf MD	246	rcu_read_unlock();
6e5f88cf MD	247
747b5930 LJ	248	if (qnode) {
	249	struct test *node;
	250
	251	node = caa_container_of(qnode, struct test, list);
94aec122	252	call_rcu(&node->rcu, free_node_cb);
bd252a04	253	URCU_TLS(nr_successful_dequeues)++;
453629a9 MD	254	}
453629a9 MD	255
bd252a04	256	URCU_TLS(nr_dequeues)++;
a0b7f7ea	257	if (caa_unlikely(!test_duration_dequeue()))
453629a9	258	break;
a0b7f7ea	259	if (caa_unlikely(rduration))
453629a9 MD	260	loop_sleep(rduration);
	261	}
	262
	263	rcu_unregister_thread();
453629a9 MD	264	printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
453629a9 MD	265	"dequeues %llu, successful_dequeues %llu\n",
6ff854ac MD	266	pthread_self(),
6ff854ac MD	267	(unsigned long) gettid(),
bd252a04 MD	268	URCU_TLS(nr_dequeues), URCU_TLS(nr_successful_dequeues));
	269	count[0] = URCU_TLS(nr_dequeues);
	270	count[1] = URCU_TLS(nr_successful_dequeues);
453629a9 MD	271	return ((void*)2);
	272	}
	273
16aa9ee8	274	void test_end(struct cds_lfq_queue_rcu q, unsigned long long nr_dequeues)
453629a9	275	{
94aec122	276	struct cds_lfq_node_rcu *snode;
453629a9 MD	277
453629a9 MD	278	do {
94aec122 MD	279	snode = cds_lfq_dequeue_rcu(q);
	280	if (snode) {
	281	struct test *node;
	282
	283	node = caa_container_of(snode, struct test, list);
e17d9985	284	free(node); /* no more concurrent access */
453629a9 MD	285	(*nr_dequeues)++;
453629a9 MD	286	}
94aec122	287	} while (snode);
453629a9 MD	288	}
	289
	290	void show_usage(int argc, char **argv)
	291	{
	292	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s)", argv[0]);
	293	printf(" [-d delay] (enqueuer period (in loops))");
	294	printf(" [-c duration] (dequeuer period (in loops))");
	295	printf(" [-v] (verbose output)");
	296	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	297	printf("\n");
	298	}
	299
	300	int main(int argc, char **argv)
	301	{
	302	int err;
	303	pthread_t tid_enqueuer, tid_dequeuer;
	304	void *tret;
	305	unsigned long long count_enqueuer, count_dequeuer;
	306	unsigned long long tot_enqueues = 0, tot_dequeues = 0;
	307	unsigned long long tot_successful_enqueues = 0,
	308	tot_successful_dequeues = 0;
	309	unsigned long long end_dequeues = 0;
	310	int i, a;
	311
	312	if (argc < 4) {
	313	show_usage(argc, argv);
	314	return -1;
	315	}
	316
	317	err = sscanf(argv[1], "%u", &nr_dequeuers);
	318	if (err != 1) {
	319	show_usage(argc, argv);
	320	return -1;
	321	}
	322
	323	err = sscanf(argv[2], "%u", &nr_enqueuers);
	324	if (err != 1) {
	325	show_usage(argc, argv);
	326	return -1;
	327	}
	328
	329	err = sscanf(argv[3], "%lu", &duration);
	330	if (err != 1) {
	331	show_usage(argc, argv);
	332	return -1;
	333	}
	334
	335	for (i = 4; i < argc; i++) {
	336	if (argv[i][0] != '-')
	337	continue;
	338	switch (argv[i][1]) {
	339	case 'a':
	340	if (argc < i + 2) {
	341	show_usage(argc, argv);
	342	return -1;
	343	}
	344	a = atoi(argv[++i]);
	345	cpu_affinities[next_aff++] = a;
	346	use_affinity = 1;
	347	printf_verbose("Adding CPU %d affinity\n", a);
	348	break;
	349	case 'c':
	350	if (argc < i + 2) {
	351	show_usage(argc, argv);
352	return -1;
353	}
354	rduration = atol(argv[++i]);
355	break;
356	case 'd':
357	if (argc < i + 2) {
358	show_usage(argc, argv);
359	return -1;
360	}
361	wdelay = atol(argv[++i]);
362	break;
363	case 'v':
364	verbose_mode = 1;
365	break;
366	}
367	}
368
369	printf_verbose("running test for %lu seconds, %u enqueuers, "
370	"%u dequeuers.\n",
371	duration, nr_enqueuers, nr_dequeuers);
372	printf_verbose("Writer delay : %lu loops.\n", rduration);
373	printf_verbose("Reader duration : %lu loops.\n", wdelay);
374	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
6ff854ac MD	375	"main", (unsigned long) pthread_self(),
6ff854ac MD	376	(unsigned long) gettid());
453629a9 MD	377
	378	tid_enqueuer = malloc(sizeof(tid_enqueuer) nr_enqueuers);
	379	tid_dequeuer = malloc(sizeof(tid_dequeuer) nr_dequeuers);
	380	count_enqueuer = malloc(2 * sizeof(count_enqueuer) nr_enqueuers);
	381	count_dequeuer = malloc(2 * sizeof(count_dequeuer) nr_dequeuers);
6e5f88cf	382	cds_lfq_init_rcu(&q, call_rcu);
94aec122	383	err = create_all_cpu_call_rcu_data(0);
8bcbd94a MD	384	if (err) {
	385	printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
	386	}
453629a9 MD	387
	388	next_aff = 0;
	389
	390	for (i = 0; i < nr_enqueuers; i++) {
	391	err = pthread_create(&tid_enqueuer[i], NULL, thr_enqueuer,
	392	&count_enqueuer[2 * i]);
	393	if (err != 0)
	394	exit(1);
	395	}
	396	for (i = 0; i < nr_dequeuers; i++) {
	397	err = pthread_create(&tid_dequeuer[i], NULL, thr_dequeuer,
	398	&count_dequeuer[2 * i]);
	399	if (err != 0)
	400	exit(1);
	401	}
	402
5481ddb3	403	cmm_smp_mb();
453629a9 MD	404
	405	test_go = 1;
	406
	407	for (i = 0; i < duration; i++) {
	408	sleep(1);
	409	if (verbose_mode)
	410	write (1, ".", 1);
	411	}
	412
	413	test_stop = 1;
	414
	415	for (i = 0; i < nr_enqueuers; i++) {
	416	err = pthread_join(tid_enqueuer[i], &tret);
	417	if (err != 0)
	418	exit(1);
	419	tot_enqueues += count_enqueuer[2 * i];
	420	tot_successful_enqueues += count_enqueuer[2 * i + 1];
	421	}
	422	for (i = 0; i < nr_dequeuers; i++) {
	423	err = pthread_join(tid_dequeuer[i], &tret);
	424	if (err != 0)
	425	exit(1);
	426	tot_dequeues += count_dequeuer[2 * i];
	427	tot_successful_dequeues += count_dequeuer[2 * i + 1];
	428	}
	429
	430	test_end(&q, &end_dequeues);
e17d9985 MD	431	err = cds_lfq_destroy_rcu(&q);
e17d9985 MD	432	assert(!err);
453629a9 MD	433
	434	printf_verbose("total number of enqueues : %llu, dequeues %llu\n",
	435	tot_enqueues, tot_dequeues);
	436	printf_verbose("total number of successful enqueues : %llu, "
	437	"successful dequeues %llu\n",
	438	tot_successful_enqueues, tot_successful_dequeues);
	439	printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu "
	440	"nr_dequeuers %3u "
	441	"rdur %6lu nr_enqueues %12llu nr_dequeues %12llu "
	442	"successful enqueues %12llu successful dequeues %12llu "
	443	"end_dequeues %llu nr_ops %12llu\n",
	444	argv[0], duration, nr_enqueuers, wdelay,
	445	nr_dequeuers, rduration, tot_enqueues, tot_dequeues,
	446	tot_successful_enqueues,
	447	tot_successful_dequeues, end_dequeues,
	448	tot_enqueues + tot_dequeues);
	449	if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues)
	450	printf("WARNING! Discrepancy between nr succ. enqueues %llu vs "
	451	"succ. dequeues + end dequeues %llu.\n",
	452	tot_successful_enqueues,
	453	tot_successful_dequeues + end_dequeues);
	454
0938c541	455	free_all_cpu_call_rcu_data();
453629a9 MD	456	free(count_enqueuer);
	457	free(count_dequeuer);
	458	free(tid_enqueuer);
	459	free(tid_dequeuer);
	460	return 0;
	461	}