[urcu.git] / tests / benchmark / test_urcu_lfs.c

/*
 * test_urcu_lfs.c
 *
 * Userspace RCU library - example lock-free stack
 *
 * Copyright 2010-2012 - 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 <errno.h>

#include <urcu/arch.h>
#include <urcu/tls-compat.h>
#include "cpuset.h"
#include "thread-id.h"

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

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

#define POISON_PTR	((void *) 0x42UL)

/*
 * External synchronization used.
 */
enum test_sync {
	TEST_SYNC_NONE = 0,
	TEST_SYNC_RCU,
};

static enum test_sync test_sync;

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;

static int test_pop, test_pop_all;

#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;

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_lfs_node list;
	struct rcu_head rcu;
};

static struct cds_lfs_stack s;

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

	printf_verbose("thread_begin %s, tid %lu\n",
			"enqueuer", urcu_get_thread_id());

	set_affinity();

	rcu_register_thread();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		struct test *node = malloc(sizeof(*node));
		if (!node)
			goto fail;
		cds_lfs_node_init(&node->list);
		cds_lfs_push(&s, &node->list);
		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, tid %lu, "
			"enqueues %llu successful_enqueues %llu\n",
			urcu_get_thread_id(),
			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);
}

static
void do_test_pop(enum test_sync sync)
{
	struct cds_lfs_node *snode;

	if (sync == TEST_SYNC_RCU)
		rcu_read_lock();
	snode = __cds_lfs_pop(&s);
	if (sync == TEST_SYNC_RCU)
		rcu_read_unlock();
	if (snode) {
		struct test *node;

		snode->next = POISON_PTR;
		node = caa_container_of(snode,
			struct test, list);
		if (sync == TEST_SYNC_RCU)
			call_rcu(&node->rcu, free_node_cb);
		else
			free(node);
		URCU_TLS(nr_successful_dequeues)++;
	}
	URCU_TLS(nr_dequeues)++;
}

static
void do_test_pop_all(enum test_sync sync)
{
	struct cds_lfs_node *snode;
	struct cds_lfs_head *head;
	struct cds_lfs_node *n;

	head = __cds_lfs_pop_all(&s);
	cds_lfs_for_each_safe(head, snode, n) {
		struct test *node;

		snode->next = POISON_PTR;
		node = caa_container_of(snode, struct test, list);
		if (sync == TEST_SYNC_RCU)
			call_rcu(&node->rcu, free_node_cb);
		else
			free(node);
		URCU_TLS(nr_successful_dequeues)++;
		URCU_TLS(nr_dequeues)++;
	}

}

static void *thr_dequeuer(void *_count)
{
	unsigned long long *count = _count;
	unsigned int counter = 0;

	printf_verbose("thread_begin %s, tid %lu\n",
			"dequeuer", urcu_get_thread_id());

	set_affinity();

	rcu_register_thread();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	assert(test_pop || test_pop_all);

	for (;;) {
		if (test_pop && test_pop_all) {
			/* both pop and pop all */
			if (counter & 1)
				do_test_pop(test_sync);
			else
				do_test_pop_all(test_sync);
			counter++;
		} else {
			if (test_pop)
				do_test_pop(test_sync);
			else
				do_test_pop_all(test_sync);
		}

		if (caa_unlikely(!test_duration_dequeue()))
			break;
		if (caa_unlikely(rduration))
			loop_sleep(rduration);
	}

	rcu_unregister_thread();

	printf_verbose("dequeuer thread_end, tid %lu, "
			"dequeues %llu, successful_dequeues %llu\n",
			urcu_get_thread_id(),
			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);
}

static void test_end(struct cds_lfs_stack *s, unsigned long long *nr_dequeues)
{
	struct cds_lfs_node *snode;

	do {
		snode = __cds_lfs_pop(s);
		if (snode) {
			struct test *node;

			node = caa_container_of(snode, struct test, list);
			free(node);
			(*nr_dequeues)++;
		}
	} while (snode);
}

static void show_usage(int argc, char **argv)
{
	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s) <OPTIONS>\n",
		argv[0]);
	printf("OPTIONS:\n");
	printf("	[-d delay] (enqueuer period (in loops))\n");
	printf("	[-c duration] (dequeuer period (in loops))\n");
	printf("	[-v] (verbose output)\n");
	printf("	[-a cpu#] [-a cpu#]... (affinity)\n");
	printf("	[-p] (test pop)\n");
	printf("	[-P] (test pop_all, enabled by default)\n");
	printf("	[-R] (use RCU external synchronization)\n");
	printf("		Note: default: no external synchronization used.\n");
	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;
		case 'p':
			test_pop = 1;
			break;
		case 'P':
			test_pop_all = 1;
			break;
		case 'R':
			test_sync = TEST_SYNC_RCU;
			break;
		}
	}

	/* activate pop_all test by default */
	if (!test_pop && !test_pop_all)
		test_pop_all = 1;

	printf_verbose("running test for %lu seconds, %u enqueuers, "
		       "%u dequeuers.\n",
		       duration, nr_enqueuers, nr_dequeuers);
	if (test_pop)
		printf_verbose("pop test activated.\n");
	if (test_pop_all)
		printf_verbose("pop_all test activated.\n");
	if (test_sync == TEST_SYNC_RCU)
		printf_verbose("External sync: RCU.\n");
	else
		printf_verbose("External sync: none.\n");
	printf_verbose("Writer delay : %lu loops.\n", rduration);
	printf_verbose("Reader duration : %lu loops.\n", wdelay);
	printf_verbose("thread %-6s, tid %lu\n",
			"main", urcu_get_thread_id());

	tid_enqueuer = calloc(nr_enqueuers, sizeof(*tid_enqueuer));
	tid_dequeuer = calloc(nr_dequeuers, sizeof(*tid_dequeuer));
	count_enqueuer = calloc(nr_enqueuers, 2 * sizeof(*count_enqueuer));
	count_dequeuer = calloc(nr_dequeuers, 2 * sizeof(*count_dequeuer));
	cds_lfs_init(&s);
	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) {
			fwrite(".", sizeof(char), 1, stdout);
			fflush(stdout);
		}
	}

	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(&s, &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_all_cpu_call_rcu_data();
	cds_lfs_destroy(&s);
	free(count_enqueuer);
	free(count_dequeuer);
	free(tid_enqueuer);
	free(tid_dequeuer);
	return 0;
}
Commit	Line	Data
453629a9 MD	1	/*
	2	* test_urcu_lfs.c
	3	*
cb8818f0	4	* Userspace RCU library - example lock-free stack
453629a9	5	*
cb8818f0	6	* Copyright 2010-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
453629a9 MD	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
f5ab766e	25	#include "config.h"
453629a9 MD	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 <errno.h>
	38
	39	#include <urcu/arch.h>
bd252a04	40	#include <urcu/tls-compat.h>
2953b501	41	#include "cpuset.h"
94df6318	42	#include "thread-id.h"
65fcc7e9	43
453629a9 MD	44	/* hardcoded number of CPUs */
	45	#define NR_CPUS 16384
	46
453629a9 MD	47	#ifndef DYNAMIC_LINK_TEST
	48	#define _LGPL_SOURCE
	49	#endif
	50	#include <urcu.h>
e5a7d709	51	#include <urcu/cds.h>
453629a9	52
f9b5c2b6 MD	53	#define POISON_PTR ((void *) 0x42UL)
f9b5c2b6 MD	54
111ce0c3 MD	55	/*
	56	* External synchronization used.
	57	*/
	58	enum test_sync {
	59	TEST_SYNC_NONE = 0,
	60	TEST_SYNC_RCU,
	61	};
	62
	63	static enum test_sync test_sync;
	64
453629a9 MD	65	static volatile int test_go, test_stop;
	66
	67	static unsigned long rduration;
	68
	69	static unsigned long duration;
	70
	71	/* read-side C.S. duration, in loops */
	72	static unsigned long wdelay;
	73
ab0aacbe	74	static inline void loop_sleep(unsigned long loops)
453629a9	75	{
ab0aacbe	76	while (loops-- != 0)
06f22bdb	77	caa_cpu_relax();
453629a9 MD	78	}
	79
	80	static int verbose_mode;
	81
111ce0c3 MD	82	static int test_pop, test_pop_all;
111ce0c3 MD	83
453629a9 MD	84	#define printf_verbose(fmt, args...) \
	85	do { \
	86	if (verbose_mode) \
111ce0c3	87	printf(fmt, ## args); \
453629a9 MD	88	} while (0)
	89
	90	static unsigned int cpu_affinities[NR_CPUS];
	91	static unsigned int next_aff = 0;
	92	static int use_affinity = 0;
	93
	94	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	95
453629a9 MD	96	static void set_affinity(void)
453629a9 MD	97	{
95bc7fb9	98	#if HAVE_SCHED_SETAFFINITY
453629a9	99	cpu_set_t mask;
95bc7fb9 MD	100	int cpu, ret;
95bc7fb9 MD	101	#endif /* HAVE_SCHED_SETAFFINITY */
453629a9 MD	102
	103	if (!use_affinity)
	104	return;
	105
	106	#if HAVE_SCHED_SETAFFINITY
	107	ret = pthread_mutex_lock(&affinity_mutex);
	108	if (ret) {
	109	perror("Error in pthread mutex lock");
	110	exit(-1);
	111	}
	112	cpu = cpu_affinities[next_aff++];
	113	ret = pthread_mutex_unlock(&affinity_mutex);
	114	if (ret) {
	115	perror("Error in pthread mutex unlock");
	116	exit(-1);
	117	}
	118
	119	CPU_ZERO(&mask);
	120	CPU_SET(cpu, &mask);
	121	#if SCHED_SETAFFINITY_ARGS == 2
	122	sched_setaffinity(0, &mask);
	123	#else
	124	sched_setaffinity(0, sizeof(mask), &mask);
	125	#endif
	126	#endif /* HAVE_SCHED_SETAFFINITY */
	127	}
	128
	129	/*
	130	* returns 0 if test should end.
	131	*/
	132	static int test_duration_dequeue(void)
	133	{
	134	return !test_stop;
	135	}
	136
	137	static int test_duration_enqueue(void)
	138	{
	139	return !test_stop;
	140	}
	141
bd252a04 MD	142	static DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
bd252a04 MD	143	static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);
453629a9	144
bd252a04 MD	145	static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
bd252a04 MD	146	static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);
453629a9 MD	147
	148	static unsigned int nr_enqueuers;
	149	static unsigned int nr_dequeuers;
	150
94aec122	151	struct test {
cb8818f0	152	struct cds_lfs_node list;
94aec122 MD	153	struct rcu_head rcu;
	154	};
	155
cb8818f0	156	static struct cds_lfs_stack s;
453629a9	157
eb314468	158	static void thr_enqueuer(void _count)
453629a9 MD	159	{
	160	unsigned long long *count = _count;
	161
94df6318 MD	162	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	163	"enqueuer", urcu_get_thread_id());
453629a9 MD	164
	165	set_affinity();
	166
	167	rcu_register_thread();
	168
	169	while (!test_go)
	170	{
	171	}
5481ddb3	172	cmm_smp_mb();
453629a9 MD	173
453629a9 MD	174	for (;;) {
94aec122	175	struct test node = malloc(sizeof(node));
453629a9 MD	176	if (!node)
453629a9 MD	177	goto fail;
cb8818f0 MD	178	cds_lfs_node_init(&node->list);
cb8818f0 MD	179	cds_lfs_push(&s, &node->list);
bd252a04	180	URCU_TLS(nr_successful_enqueues)++;
453629a9	181
a0b7f7ea	182	if (caa_unlikely(wdelay))
453629a9 MD	183	loop_sleep(wdelay);
453629a9 MD	184	fail:
bd252a04	185	URCU_TLS(nr_enqueues)++;
a0b7f7ea	186	if (caa_unlikely(!test_duration_enqueue()))
453629a9 MD	187	break;
	188	}
	189
	190	rcu_unregister_thread();
	191
bd252a04 MD	192	count[0] = URCU_TLS(nr_enqueues);
bd252a04 MD	193	count[1] = URCU_TLS(nr_successful_enqueues);
94df6318 MD	194	printf_verbose("enqueuer thread_end, tid %lu, "
	195	"enqueues %llu successful_enqueues %llu\n",
	196	urcu_get_thread_id(),
	197	URCU_TLS(nr_enqueues),
	198	URCU_TLS(nr_successful_enqueues));
453629a9 MD	199	return ((void*)1);
	200
	201	}
	202
94aec122 MD	203	static
	204	void free_node_cb(struct rcu_head *head)
	205	{
	206	struct test *node =
	207	caa_container_of(head, struct test, rcu);
	208	free(node);
	209	}
	210
111ce0c3 MD	211	static
	212	void do_test_pop(enum test_sync sync)
	213	{
	214	struct cds_lfs_node *snode;
	215
	216	if (sync == TEST_SYNC_RCU)
	217	rcu_read_lock();
	218	snode = __cds_lfs_pop(&s);
	219	if (sync == TEST_SYNC_RCU)
	220	rcu_read_unlock();
	221	if (snode) {
	222	struct test *node;
	223
f9b5c2b6	224	snode->next = POISON_PTR;
111ce0c3 MD	225	node = caa_container_of(snode,
	226	struct test, list);
	227	if (sync == TEST_SYNC_RCU)
	228	call_rcu(&node->rcu, free_node_cb);
	229	else
	230	free(node);
	231	URCU_TLS(nr_successful_dequeues)++;
	232	}
	233	URCU_TLS(nr_dequeues)++;
	234	}
	235
	236	static
	237	void do_test_pop_all(enum test_sync sync)
	238	{
	239	struct cds_lfs_node *snode;
	240	struct cds_lfs_head *head;
	241	struct cds_lfs_node *n;
	242
	243	head = __cds_lfs_pop_all(&s);
	244	cds_lfs_for_each_safe(head, snode, n) {
	245	struct test *node;
	246
f9b5c2b6	247	snode->next = POISON_PTR;
111ce0c3 MD	248	node = caa_container_of(snode, struct test, list);
	249	if (sync == TEST_SYNC_RCU)
	250	call_rcu(&node->rcu, free_node_cb);
	251	else
	252	free(node);
	253	URCU_TLS(nr_successful_dequeues)++;
	254	URCU_TLS(nr_dequeues)++;
	255	}
	256
	257	}
	258
eb314468	259	static void thr_dequeuer(void _count)
453629a9 MD	260	{
453629a9 MD	261	unsigned long long *count = _count;
f42bc7ef	262	unsigned int counter = 0;
453629a9	263
94df6318 MD	264	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	265	"dequeuer", urcu_get_thread_id());
453629a9 MD	266
	267	set_affinity();
	268
453629a9 MD	269	rcu_register_thread();
	270
	271	while (!test_go)
	272	{
	273	}
5481ddb3	274	cmm_smp_mb();
453629a9	275
111ce0c3	276	assert(test_pop \|\| test_pop_all);
f3eb6ef1	277
111ce0c3	278	for (;;) {
111ce0c3 MD	279	if (test_pop && test_pop_all) {
	280	/* both pop and pop all */
	281	if (counter & 1)
	282	do_test_pop(test_sync);
	283	else
	284	do_test_pop_all(test_sync);
	285	counter++;
	286	} else {
	287	if (test_pop)
	288	do_test_pop(test_sync);
	289	else
	290	do_test_pop_all(test_sync);
453629a9	291	}
111ce0c3	292
a0b7f7ea	293	if (caa_unlikely(!test_duration_dequeue()))
453629a9	294	break;
a0b7f7ea	295	if (caa_unlikely(rduration))
453629a9 MD	296	loop_sleep(rduration);
	297	}
	298
	299	rcu_unregister_thread();
453629a9	300
94df6318 MD	301	printf_verbose("dequeuer thread_end, tid %lu, "
	302	"dequeues %llu, successful_dequeues %llu\n",
	303	urcu_get_thread_id(),
	304	URCU_TLS(nr_dequeues),
	305	URCU_TLS(nr_successful_dequeues));
bd252a04 MD	306	count[0] = URCU_TLS(nr_dequeues);
bd252a04 MD	307	count[1] = URCU_TLS(nr_successful_dequeues);
453629a9 MD	308	return ((void*)2);
	309	}
	310
eb314468	311	static void test_end(struct cds_lfs_stack s, unsigned long long nr_dequeues)
453629a9	312	{
cb8818f0	313	struct cds_lfs_node *snode;
453629a9 MD	314
453629a9 MD	315	do {
7294103b	316	snode = __cds_lfs_pop(s);
94aec122 MD	317	if (snode) {
	318	struct test *node;
	319
	320	node = caa_container_of(snode, struct test, list);
453629a9 MD	321	free(node);
	322	(*nr_dequeues)++;
	323	}
94aec122	324	} while (snode);
453629a9 MD	325	}
453629a9 MD	326
eb314468	327	static void show_usage(int argc, char **argv)
453629a9	328	{
06637138 MD	329	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s) <OPTIONS>\n",
	330	argv[0]);
	331	printf("OPTIONS:\n");
	332	printf(" [-d delay] (enqueuer period (in loops))\n");
	333	printf(" [-c duration] (dequeuer period (in loops))\n");
	334	printf(" [-v] (verbose output)\n");
	335	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
	336	printf(" [-p] (test pop)\n");
	337	printf(" [-P] (test pop_all, enabled by default)\n");
	338	printf(" [-R] (use RCU external synchronization)\n");
	339	printf(" Note: default: no external synchronization used.\n");
453629a9 MD	340	printf("\n");
	341	}
	342
	343	int main(int argc, char **argv)
	344	{
	345	int err;
	346	pthread_t tid_enqueuer, tid_dequeuer;
	347	void *tret;
	348	unsigned long long count_enqueuer, count_dequeuer;
	349	unsigned long long tot_enqueues = 0, tot_dequeues = 0;
	350	unsigned long long tot_successful_enqueues = 0,
	351	tot_successful_dequeues = 0;
	352	unsigned long long end_dequeues = 0;
	353	int i, a;
	354
	355	if (argc < 4) {
	356	show_usage(argc, argv);
	357	return -1;
	358	}
	359
	360	err = sscanf(argv[1], "%u", &nr_dequeuers);
	361	if (err != 1) {
	362	show_usage(argc, argv);
	363	return -1;
	364	}
	365
	366	err = sscanf(argv[2], "%u", &nr_enqueuers);
	367	if (err != 1) {
	368	show_usage(argc, argv);
	369	return -1;
	370	}
	371
	372	err = sscanf(argv[3], "%lu", &duration);
	373	if (err != 1) {
	374	show_usage(argc, argv);
	375	return -1;
	376	}
	377
	378	for (i = 4; i < argc; i++) {
	379	if (argv[i][0] != '-')
	380	continue;
	381	switch (argv[i][1]) {
	382	case 'a':
	383	if (argc < i + 2) {
	384	show_usage(argc, argv);
	385	return -1;
	386	}
	387	a = atoi(argv[++i]);
	388	cpu_affinities[next_aff++] = a;
	389	use_affinity = 1;
	390	printf_verbose("Adding CPU %d affinity\n", a);
	391	break;
	392	case 'c':
	393	if (argc < i + 2) {
	394	show_usage(argc, argv);
	395	return -1;
	396	}
	397	rduration = atol(argv[++i]);
	398	break;
	399	case 'd':
	400	if (argc < i + 2) {
	401	show_usage(argc, argv);
	402	return -1;
	403	}
404	wdelay = atol(argv[++i]);
405	break;
406	case 'v':
407	verbose_mode = 1;
408	break;
111ce0c3 MD	409	case 'p':
	410	test_pop = 1;
	411	break;
	412	case 'P':
	413	test_pop_all = 1;
	414	break;
	415	case 'R':
	416	test_sync = TEST_SYNC_RCU;
	417	break;
453629a9 MD	418	}
	419	}
	420
111ce0c3 MD	421	/* activate pop_all test by default */
	422	if (!test_pop && !test_pop_all)
	423	test_pop_all = 1;
	424
453629a9 MD	425	printf_verbose("running test for %lu seconds, %u enqueuers, "
	426	"%u dequeuers.\n",
	427	duration, nr_enqueuers, nr_dequeuers);
111ce0c3 MD	428	if (test_pop)
	429	printf_verbose("pop test activated.\n");
	430	if (test_pop_all)
	431	printf_verbose("pop_all test activated.\n");
eb314468 MD	432	if (test_sync == TEST_SYNC_RCU)
	433	printf_verbose("External sync: RCU.\n");
	434	else
	435	printf_verbose("External sync: none.\n");
453629a9 MD	436	printf_verbose("Writer delay : %lu loops.\n", rduration);
453629a9 MD	437	printf_verbose("Reader duration : %lu loops.\n", wdelay);
94df6318 MD	438	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	439	"main", urcu_get_thread_id());
453629a9	440
9aa14175 MD	441	tid_enqueuer = calloc(nr_enqueuers, sizeof(*tid_enqueuer));
	442	tid_dequeuer = calloc(nr_dequeuers, sizeof(*tid_dequeuer));
	443	count_enqueuer = calloc(nr_enqueuers, 2 * sizeof(*count_enqueuer));
	444	count_dequeuer = calloc(nr_dequeuers, 2 * sizeof(*count_dequeuer));
cb8818f0	445	cds_lfs_init(&s);
94aec122	446	err = create_all_cpu_call_rcu_data(0);
8bcbd94a MD	447	if (err) {
	448	printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
	449	}
453629a9 MD	450
	451	next_aff = 0;
	452
	453	for (i = 0; i < nr_enqueuers; i++) {
	454	err = pthread_create(&tid_enqueuer[i], NULL, thr_enqueuer,
	455	&count_enqueuer[2 * i]);
	456	if (err != 0)
	457	exit(1);
	458	}
	459	for (i = 0; i < nr_dequeuers; i++) {
	460	err = pthread_create(&tid_dequeuer[i], NULL, thr_dequeuer,
	461	&count_dequeuer[2 * i]);
	462	if (err != 0)
	463	exit(1);
	464	}
	465
5481ddb3	466	cmm_smp_mb();
453629a9 MD	467
	468	test_go = 1;
	469
	470	for (i = 0; i < duration; i++) {
	471	sleep(1);
4b665350 MD	472	if (verbose_mode) {
	473	fwrite(".", sizeof(char), 1, stdout);
	474	fflush(stdout);
	475	}
453629a9 MD	476	}
	477
	478	test_stop = 1;
	479
	480	for (i = 0; i < nr_enqueuers; i++) {
	481	err = pthread_join(tid_enqueuer[i], &tret);
	482	if (err != 0)
	483	exit(1);
	484	tot_enqueues += count_enqueuer[2 * i];
	485	tot_successful_enqueues += count_enqueuer[2 * i + 1];
	486	}
	487	for (i = 0; i < nr_dequeuers; i++) {
	488	err = pthread_join(tid_dequeuer[i], &tret);
	489	if (err != 0)
	490	exit(1);
	491	tot_dequeues += count_dequeuer[2 * i];
	492	tot_successful_dequeues += count_dequeuer[2 * i + 1];
	493	}
	494
	495	test_end(&s, &end_dequeues);
	496
	497	printf_verbose("total number of enqueues : %llu, dequeues %llu\n",
	498	tot_enqueues, tot_dequeues);
	499	printf_verbose("total number of successful enqueues : %llu, "
	500	"successful dequeues %llu\n",
	501	tot_successful_enqueues, tot_successful_dequeues);
	502	printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu "
	503	"nr_dequeuers %3u "
	504	"rdur %6lu nr_enqueues %12llu nr_dequeues %12llu "
	505	"successful enqueues %12llu successful dequeues %12llu "
	506	"end_dequeues %llu nr_ops %12llu\n",
	507	argv[0], duration, nr_enqueuers, wdelay,
	508	nr_dequeuers, rduration, tot_enqueues, tot_dequeues,
	509	tot_successful_enqueues,
	510	tot_successful_dequeues, end_dequeues,
	511	tot_enqueues + tot_dequeues);
	512	if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues)
	513	printf("WARNING! Discrepancy between nr succ. enqueues %llu vs "
	514	"succ. dequeues + end dequeues %llu.\n",
	515	tot_successful_enqueues,
	516	tot_successful_dequeues + end_dequeues);
	517
0938c541	518	free_all_cpu_call_rcu_data();
2af1c19e	519	cds_lfs_destroy(&s);
453629a9 MD	520	free(count_enqueuer);
	521	free(count_dequeuer);
	522	free(tid_enqueuer);
	523	free(tid_dequeuer);
	524	return 0;
	525	}