[urcu.git] / tests / test_urcu_wfs.c

/*
 * test_urcu_wfs.c
 *
 * Userspace RCU library - example RCU-based lock-free stack
 *
 * 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/wfstack.h>

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

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;

#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;

static struct cds_wfs_stack s;

static 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();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		struct cds_wfs_node *node = malloc(sizeof(*node));
		if (!node)
			goto fail;
		cds_wfs_node_init(node);
		cds_wfs_push(&s, node);
		URCU_TLS(nr_successful_enqueues)++;

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

	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 do_test_pop(enum test_sync sync)
{
	struct cds_wfs_node *node;

	if (sync == TEST_SYNC_MUTEX)
		cds_wfs_pop_lock(&s);
	node = __cds_wfs_pop_blocking(&s);
	if (sync == TEST_SYNC_MUTEX)
		cds_wfs_pop_unlock(&s);

	if (node) {
		free(node);
		URCU_TLS(nr_successful_dequeues)++;
	}
	URCU_TLS(nr_dequeues)++;
}

static void do_test_pop_all(enum test_sync sync)
{
	struct cds_wfs_head *head;
	struct cds_wfs_node *node, *n;

	if (sync == TEST_SYNC_MUTEX)
		cds_wfs_pop_lock(&s);
	head = __cds_wfs_pop_all(&s);
	if (sync == TEST_SYNC_MUTEX)
		cds_wfs_pop_unlock(&s);

	cds_wfs_for_each_blocking_safe(head, node, n) {
		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;

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

	set_affinity();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	assert(test_pop || test_pop_all);

	for (;;) {
		if (test_pop && test_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);
	}

	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);
}

static void test_end(struct cds_wfs_stack *s, unsigned long long *nr_dequeues)
{
	struct cds_wfs_node *node;

	do {
		node = cds_wfs_pop_blocking(s);
		if (node) {
			free(node);
			(*nr_dequeues)++;
		}
	} while (node);
}

static 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(" [-p] (test pop)");
	printf(" [-P] (test pop_all, enabled by default)");
	printf(" [-M] (use mutex external synchronization)");
	printf("      Note: default: no external synchronization used.");
	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 'M':
			test_sync = TEST_SYNC_MUTEX;
			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_MUTEX)
		printf_verbose("External sync: mutex.\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, 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_wfs_init(&s);

	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(&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(count_enqueuer);
	free(count_dequeuer);
	free(tid_enqueuer);
	free(tid_dequeuer);
	return 0;
}
Commit	Line	Data
a5eb5ffc MD	1	/*
	2	* test_urcu_wfs.c
	3	*
	4	* Userspace RCU library - example RCU-based lock-free stack
	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>
a5eb5ffc MD	37	#include <sched.h>
	38	#include <errno.h>
	39
	40	#include <urcu/arch.h>
bd252a04	41	#include <urcu/tls-compat.h>
a5eb5ffc	42
65fcc7e9 MD	43	#ifdef __linux__
	44	#include <syscall.h>
	45	#endif
	46
a5eb5ffc 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>
cb3f3d6b	69	#include <urcu/wfstack.h>
a5eb5ffc	70
69328034 MD	71	/*
	72	* External synchronization used.
	73	*/
	74	enum test_sync {
	75	TEST_SYNC_NONE = 0,
	76	TEST_SYNC_MUTEX,
	77	};
	78
	79	static enum test_sync test_sync;
	80
a5eb5ffc MD	81	static volatile int test_go, test_stop;
	82
	83	static unsigned long rduration;
	84
	85	static unsigned long duration;
	86
	87	/* read-side C.S. duration, in loops */
	88	static unsigned long wdelay;
	89
ab0aacbe	90	static inline void loop_sleep(unsigned long loops)
a5eb5ffc	91	{
ab0aacbe	92	while (loops-- != 0)
06f22bdb	93	caa_cpu_relax();
a5eb5ffc MD	94	}
	95
	96	static int verbose_mode;
	97
69328034 MD	98	static int test_pop, test_pop_all;
69328034 MD	99
a5eb5ffc MD	100	#define printf_verbose(fmt, args...) \
	101	do { \
	102	if (verbose_mode) \
69328034	103	printf(fmt, ## args); \
a5eb5ffc MD	104	} while (0)
	105
	106	static unsigned int cpu_affinities[NR_CPUS];
	107	static unsigned int next_aff = 0;
	108	static int use_affinity = 0;
	109
	110	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	111
	112	#ifndef HAVE_CPU_SET_T
	113	typedef unsigned long cpu_set_t;
	114	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	115	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	116	#endif
	117
	118	static void set_affinity(void)
	119	{
95bc7fb9	120	#if HAVE_SCHED_SETAFFINITY
a5eb5ffc	121	cpu_set_t mask;
95bc7fb9 MD	122	int cpu, ret;
95bc7fb9 MD	123	#endif /* HAVE_SCHED_SETAFFINITY */
a5eb5ffc MD	124
	125	if (!use_affinity)
	126	return;
	127
	128	#if HAVE_SCHED_SETAFFINITY
	129	ret = pthread_mutex_lock(&affinity_mutex);
	130	if (ret) {
	131	perror("Error in pthread mutex lock");
	132	exit(-1);
	133	}
	134	cpu = cpu_affinities[next_aff++];
	135	ret = pthread_mutex_unlock(&affinity_mutex);
	136	if (ret) {
	137	perror("Error in pthread mutex unlock");
	138	exit(-1);
	139	}
	140
	141	CPU_ZERO(&mask);
	142	CPU_SET(cpu, &mask);
	143	#if SCHED_SETAFFINITY_ARGS == 2
	144	sched_setaffinity(0, &mask);
	145	#else
	146	sched_setaffinity(0, sizeof(mask), &mask);
	147	#endif
	148	#endif /* HAVE_SCHED_SETAFFINITY */
	149	}
	150
	151	/*
	152	* returns 0 if test should end.
	153	*/
	154	static int test_duration_dequeue(void)
	155	{
	156	return !test_stop;
	157	}
	158
	159	static int test_duration_enqueue(void)
	160	{
	161	return !test_stop;
	162	}
	163
bd252a04 MD	164	static DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
bd252a04 MD	165	static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);
a5eb5ffc	166
bd252a04 MD	167	static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
bd252a04 MD	168	static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);
a5eb5ffc MD	169
	170	static unsigned int nr_enqueuers;
	171	static unsigned int nr_dequeuers;
	172
16aa9ee8	173	static struct cds_wfs_stack s;
a5eb5ffc	174
98fbc848	175	static void thr_enqueuer(void _count)
a5eb5ffc MD	176	{
	177	unsigned long long *count = _count;
	178
	179	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
6ff854ac MD	180	"enqueuer", (unsigned long) pthread_self(),
6ff854ac MD	181	(unsigned long) gettid());
a5eb5ffc MD	182
	183	set_affinity();
	184
a5eb5ffc MD	185	while (!test_go)
	186	{
	187	}
5481ddb3	188	cmm_smp_mb();
a5eb5ffc MD	189
a5eb5ffc MD	190	for (;;) {
16aa9ee8	191	struct cds_wfs_node node = malloc(sizeof(node));
a5eb5ffc MD	192	if (!node)
a5eb5ffc MD	193	goto fail;
16aa9ee8 DG	194	cds_wfs_node_init(node);
16aa9ee8 DG	195	cds_wfs_push(&s, node);
bd252a04	196	URCU_TLS(nr_successful_enqueues)++;
a5eb5ffc	197
a0b7f7ea	198	if (caa_unlikely(wdelay))
a5eb5ffc MD	199	loop_sleep(wdelay);
a5eb5ffc MD	200	fail:
bd252a04	201	URCU_TLS(nr_enqueues)++;
a0b7f7ea	202	if (caa_unlikely(!test_duration_enqueue()))
a5eb5ffc MD	203	break;
	204	}
	205
bd252a04 MD	206	count[0] = URCU_TLS(nr_enqueues);
bd252a04 MD	207	count[1] = URCU_TLS(nr_successful_enqueues);
a5eb5ffc MD	208	printf_verbose("enqueuer thread_end, thread id : %lx, tid %lu, "
a5eb5ffc MD	209	"enqueues %llu successful_enqueues %llu\n",
6ff854ac MD	210	pthread_self(),
6ff854ac MD	211	(unsigned long) gettid(),
bd252a04	212	URCU_TLS(nr_enqueues), URCU_TLS(nr_successful_enqueues));
a5eb5ffc MD	213	return ((void*)1);
	214
	215	}
	216
69328034 MD	217	static void do_test_pop(enum test_sync sync)
	218	{
	219	struct cds_wfs_node *node;
	220
	221	if (sync == TEST_SYNC_MUTEX)
	222	cds_wfs_pop_lock(&s);
	223	node = __cds_wfs_pop_blocking(&s);
	224	if (sync == TEST_SYNC_MUTEX)
	225	cds_wfs_pop_unlock(&s);
	226
	227	if (node) {
	228	free(node);
	229	URCU_TLS(nr_successful_dequeues)++;
	230	}
	231	URCU_TLS(nr_dequeues)++;
	232	}
	233
	234	static void do_test_pop_all(enum test_sync sync)
	235	{
	236	struct cds_wfs_head *head;
	237	struct cds_wfs_node node, n;
	238
	239	if (sync == TEST_SYNC_MUTEX)
	240	cds_wfs_pop_lock(&s);
	241	head = __cds_wfs_pop_all(&s);
	242	if (sync == TEST_SYNC_MUTEX)
	243	cds_wfs_pop_unlock(&s);
	244
	245	cds_wfs_for_each_blocking_safe(head, node, n) {
	246	free(node);
	247	URCU_TLS(nr_successful_dequeues)++;
	248	URCU_TLS(nr_dequeues)++;
	249	}
	250	}
	251
98fbc848	252	static void thr_dequeuer(void _count)
a5eb5ffc MD	253	{
a5eb5ffc MD	254	unsigned long long *count = _count;
69328034	255	unsigned int counter;
a5eb5ffc MD	256
a5eb5ffc MD	257	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
6ff854ac MD	258	"dequeuer", (unsigned long) pthread_self(),
6ff854ac MD	259	(unsigned long) gettid());
a5eb5ffc MD	260
	261	set_affinity();
	262
a5eb5ffc MD	263	while (!test_go)
	264	{
	265	}
5481ddb3	266	cmm_smp_mb();
a5eb5ffc	267
69328034	268	assert(test_pop \|\| test_pop_all);
a5eb5ffc	269
69328034 MD	270	for (;;) {
	271	if (test_pop && test_pop_all) {
	272	if (counter & 1)
	273	do_test_pop(test_sync);
	274	else
	275	do_test_pop_all(test_sync);
	276	counter++;
	277	} else {
	278	if (test_pop)
	279	do_test_pop(test_sync);
	280	else
	281	do_test_pop_all(test_sync);
a5eb5ffc MD	282	}
a5eb5ffc MD	283
a0b7f7ea	284	if (caa_unlikely(!test_duration_dequeue()))
a5eb5ffc	285	break;
a0b7f7ea	286	if (caa_unlikely(rduration))
a5eb5ffc MD	287	loop_sleep(rduration);
	288	}
	289
a5eb5ffc MD	290	printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
a5eb5ffc MD	291	"dequeues %llu, successful_dequeues %llu\n",
6ff854ac MD	292	pthread_self(),
6ff854ac MD	293	(unsigned long) gettid(),
bd252a04 MD	294	URCU_TLS(nr_dequeues), URCU_TLS(nr_successful_dequeues));
	295	count[0] = URCU_TLS(nr_dequeues);
	296	count[1] = URCU_TLS(nr_successful_dequeues);
a5eb5ffc MD	297	return ((void*)2);
	298	}
	299
98fbc848	300	static void test_end(struct cds_wfs_stack s, unsigned long long nr_dequeues)
a5eb5ffc	301	{
16aa9ee8	302	struct cds_wfs_node *node;
a5eb5ffc MD	303
a5eb5ffc MD	304	do {
16aa9ee8	305	node = cds_wfs_pop_blocking(s);
a5eb5ffc MD	306	if (node) {
	307	free(node);
	308	(*nr_dequeues)++;
	309	}
	310	} while (node);
	311	}
	312
98fbc848	313	static void show_usage(int argc, char **argv)
a5eb5ffc MD	314	{
	315	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s)", argv[0]);
	316	printf(" [-d delay] (enqueuer period (in loops))");
	317	printf(" [-c duration] (dequeuer period (in loops))");
	318	printf(" [-v] (verbose output)");
	319	printf(" [-a cpu#] [-a cpu#]... (affinity)");
69328034 MD	320	printf(" [-p] (test pop)");
	321	printf(" [-P] (test pop_all, enabled by default)");
	322	printf(" [-M] (use mutex external synchronization)");
	323	printf(" Note: default: no external synchronization used.");
a5eb5ffc MD	324	printf("\n");
	325	}
	326
	327	int main(int argc, char **argv)
	328	{
	329	int err;
	330	pthread_t tid_enqueuer, tid_dequeuer;
	331	void *tret;
	332	unsigned long long count_enqueuer, count_dequeuer;
	333	unsigned long long tot_enqueues = 0, tot_dequeues = 0;
	334	unsigned long long tot_successful_enqueues = 0,
	335	tot_successful_dequeues = 0;
	336	unsigned long long end_dequeues = 0;
	337	int i, a;
	338
	339	if (argc < 4) {
	340	show_usage(argc, argv);
	341	return -1;
	342	}
	343
	344	err = sscanf(argv[1], "%u", &nr_dequeuers);
	345	if (err != 1) {
	346	show_usage(argc, argv);
	347	return -1;
	348	}
	349
	350	err = sscanf(argv[2], "%u", &nr_enqueuers);
	351	if (err != 1) {
	352	show_usage(argc, argv);
	353	return -1;
	354	}
	355
	356	err = sscanf(argv[3], "%lu", &duration);
	357	if (err != 1) {
	358	show_usage(argc, argv);
	359	return -1;
	360	}
	361
	362	for (i = 4; i < argc; i++) {
	363	if (argv[i][0] != '-')
	364	continue;
	365	switch (argv[i][1]) {
	366	case 'a':
	367	if (argc < i + 2) {
	368	show_usage(argc, argv);
	369	return -1;
	370	}
	371	a = atoi(argv[++i]);
	372	cpu_affinities[next_aff++] = a;
	373	use_affinity = 1;
	374	printf_verbose("Adding CPU %d affinity\n", a);
	375	break;
	376	case 'c':
	377	if (argc < i + 2) {
	378	show_usage(argc, argv);
	379	return -1;
	380	}
	381	rduration = atol(argv[++i]);
	382	break;
	383	case 'd':
	384	if (argc < i + 2) {
	385	show_usage(argc, argv);
	386	return -1;
	387	}
388	wdelay = atol(argv[++i]);
389	break;
390	case 'v':
391	verbose_mode = 1;
392	break;
69328034 MD	393	case 'p':
	394	test_pop = 1;
	395	break;
	396	case 'P':
	397	test_pop_all = 1;
	398	break;
	399	case 'M':
	400	test_sync = TEST_SYNC_MUTEX;
	401	break;
a5eb5ffc MD	402	}
	403	}
	404
69328034 MD	405	/* activate pop_all test by default */
	406	if (!test_pop && !test_pop_all)
	407	test_pop_all = 1;
	408
a5eb5ffc MD	409	printf_verbose("running test for %lu seconds, %u enqueuers, "
	410	"%u dequeuers.\n",
	411	duration, nr_enqueuers, nr_dequeuers);
69328034 MD	412	if (test_pop)
	413	printf_verbose("pop test activated.\n");
	414	if (test_pop_all)
	415	printf_verbose("pop_all test activated.\n");
98fbc848 MD	416	if (test_sync == TEST_SYNC_MUTEX)
	417	printf_verbose("External sync: mutex.\n");
	418	else
	419	printf_verbose("External sync: none.\n");
a5eb5ffc MD	420	printf_verbose("Writer delay : %lu loops.\n", rduration);
	421	printf_verbose("Reader duration : %lu loops.\n", wdelay);
	422	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
6ff854ac MD	423	"main", (unsigned long) pthread_self(),
6ff854ac MD	424	(unsigned long) gettid());
a5eb5ffc MD	425
	426	tid_enqueuer = malloc(sizeof(tid_enqueuer) nr_enqueuers);
	427	tid_dequeuer = malloc(sizeof(tid_dequeuer) nr_dequeuers);
	428	count_enqueuer = malloc(2 * sizeof(count_enqueuer) nr_enqueuers);
	429	count_dequeuer = malloc(2 * sizeof(count_dequeuer) nr_dequeuers);
16aa9ee8	430	cds_wfs_init(&s);
a5eb5ffc MD	431
	432	next_aff = 0;
	433
	434	for (i = 0; i < nr_enqueuers; i++) {
	435	err = pthread_create(&tid_enqueuer[i], NULL, thr_enqueuer,
	436	&count_enqueuer[2 * i]);
	437	if (err != 0)
	438	exit(1);
	439	}
	440	for (i = 0; i < nr_dequeuers; i++) {
	441	err = pthread_create(&tid_dequeuer[i], NULL, thr_dequeuer,
	442	&count_dequeuer[2 * i]);
	443	if (err != 0)
	444	exit(1);
	445	}
	446
5481ddb3	447	cmm_smp_mb();
a5eb5ffc MD	448
	449	test_go = 1;
	450
	451	for (i = 0; i < duration; i++) {
	452	sleep(1);
	453	if (verbose_mode)
	454	write (1, ".", 1);
	455	}
	456
	457	test_stop = 1;
	458
	459	for (i = 0; i < nr_enqueuers; i++) {
	460	err = pthread_join(tid_enqueuer[i], &tret);
	461	if (err != 0)
	462	exit(1);
	463	tot_enqueues += count_enqueuer[2 * i];
	464	tot_successful_enqueues += count_enqueuer[2 * i + 1];
	465	}
	466	for (i = 0; i < nr_dequeuers; i++) {
	467	err = pthread_join(tid_dequeuer[i], &tret);
	468	if (err != 0)
	469	exit(1);
	470	tot_dequeues += count_dequeuer[2 * i];
	471	tot_successful_dequeues += count_dequeuer[2 * i + 1];
	472	}
	473
	474	test_end(&s, &end_dequeues);
	475
	476	printf_verbose("total number of enqueues : %llu, dequeues %llu\n",
	477	tot_enqueues, tot_dequeues);
	478	printf_verbose("total number of successful enqueues : %llu, "
	479	"successful dequeues %llu\n",
	480	tot_successful_enqueues, tot_successful_dequeues);
	481	printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu "
	482	"nr_dequeuers %3u "
	483	"rdur %6lu nr_enqueues %12llu nr_dequeues %12llu "
	484	"successful enqueues %12llu successful dequeues %12llu "
	485	"end_dequeues %llu nr_ops %12llu\n",
	486	argv[0], duration, nr_enqueuers, wdelay,
	487	nr_dequeuers, rduration, tot_enqueues, tot_dequeues,
	488	tot_successful_enqueues,
	489	tot_successful_dequeues, end_dequeues,
	490	tot_enqueues + tot_dequeues);
	491	if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues)
	492	printf("WARNING! Discrepancy between nr succ. enqueues %llu vs "
	493	"succ. dequeues + end dequeues %llu.\n",
	494	tot_successful_enqueues,
	495	tot_successful_dequeues + end_dequeues);
	496
	497	free(count_enqueuer);
	498	free(count_dequeuer);
	499	free(tid_enqueuer);
	500	free(tid_dequeuer);
	501	return 0;
	502	}