[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 int test_force_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(" [-f] (force user-provided synchronization)");
	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;
		case 'f':
			test_force_sync = 1;
			break;
		}
	}

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

	if (test_sync == TEST_SYNC_NONE && nr_dequeuers > 1 && test_pop) {
		if (test_force_sync) {
			fprintf(stderr, "[WARNING] Using pop concurrently "
				"with other pop or pop_all without external "
				"synchronization. Expect run-time failure.\n");
		} else {
			printf("Enforcing mutex synchronization\n");
			test_sync = TEST_SYNC_MUTEX;
		}
	}

	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
0ee400bd MD	81	static int test_force_sync;
0ee400bd MD	82
a5eb5ffc MD	83	static volatile int test_go, test_stop;
	84
	85	static unsigned long rduration;
	86
	87	static unsigned long duration;
	88
	89	/* read-side C.S. duration, in loops */
	90	static unsigned long wdelay;
	91
ab0aacbe	92	static inline void loop_sleep(unsigned long loops)
a5eb5ffc	93	{
ab0aacbe	94	while (loops-- != 0)
06f22bdb	95	caa_cpu_relax();
a5eb5ffc MD	96	}
	97
	98	static int verbose_mode;
	99
69328034 MD	100	static int test_pop, test_pop_all;
69328034 MD	101
a5eb5ffc MD	102	#define printf_verbose(fmt, args...) \
	103	do { \
	104	if (verbose_mode) \
69328034	105	printf(fmt, ## args); \
a5eb5ffc MD	106	} while (0)
	107
	108	static unsigned int cpu_affinities[NR_CPUS];
	109	static unsigned int next_aff = 0;
	110	static int use_affinity = 0;
	111
	112	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	113
	114	#ifndef HAVE_CPU_SET_T
	115	typedef unsigned long cpu_set_t;
	116	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	117	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	118	#endif
	119
	120	static void set_affinity(void)
	121	{
95bc7fb9	122	#if HAVE_SCHED_SETAFFINITY
a5eb5ffc	123	cpu_set_t mask;
95bc7fb9 MD	124	int cpu, ret;
95bc7fb9 MD	125	#endif /* HAVE_SCHED_SETAFFINITY */
a5eb5ffc MD	126
	127	if (!use_affinity)
	128	return;
	129
	130	#if HAVE_SCHED_SETAFFINITY
	131	ret = pthread_mutex_lock(&affinity_mutex);
	132	if (ret) {
	133	perror("Error in pthread mutex lock");
	134	exit(-1);
	135	}
	136	cpu = cpu_affinities[next_aff++];
	137	ret = pthread_mutex_unlock(&affinity_mutex);
	138	if (ret) {
	139	perror("Error in pthread mutex unlock");
	140	exit(-1);
	141	}
	142
	143	CPU_ZERO(&mask);
	144	CPU_SET(cpu, &mask);
	145	#if SCHED_SETAFFINITY_ARGS == 2
	146	sched_setaffinity(0, &mask);
	147	#else
	148	sched_setaffinity(0, sizeof(mask), &mask);
	149	#endif
	150	#endif /* HAVE_SCHED_SETAFFINITY */
	151	}
	152
	153	/*
	154	* returns 0 if test should end.
	155	*/
	156	static int test_duration_dequeue(void)
	157	{
	158	return !test_stop;
	159	}
	160
	161	static int test_duration_enqueue(void)
	162	{
	163	return !test_stop;
	164	}
	165
bd252a04 MD	166	static DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
bd252a04 MD	167	static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);
a5eb5ffc	168
bd252a04 MD	169	static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
bd252a04 MD	170	static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);
a5eb5ffc MD	171
	172	static unsigned int nr_enqueuers;
	173	static unsigned int nr_dequeuers;
	174
16aa9ee8	175	static struct cds_wfs_stack s;
a5eb5ffc	176
98fbc848	177	static void thr_enqueuer(void _count)
a5eb5ffc MD	178	{
	179	unsigned long long *count = _count;
	180
	181	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
6ff854ac MD	182	"enqueuer", (unsigned long) pthread_self(),
6ff854ac MD	183	(unsigned long) gettid());
a5eb5ffc MD	184
	185	set_affinity();
	186
a5eb5ffc MD	187	while (!test_go)
	188	{
	189	}
5481ddb3	190	cmm_smp_mb();
a5eb5ffc MD	191
a5eb5ffc MD	192	for (;;) {
16aa9ee8	193	struct cds_wfs_node node = malloc(sizeof(node));
a5eb5ffc MD	194	if (!node)
a5eb5ffc MD	195	goto fail;
16aa9ee8 DG	196	cds_wfs_node_init(node);
16aa9ee8 DG	197	cds_wfs_push(&s, node);
bd252a04	198	URCU_TLS(nr_successful_enqueues)++;
a5eb5ffc	199
a0b7f7ea	200	if (caa_unlikely(wdelay))
a5eb5ffc MD	201	loop_sleep(wdelay);
a5eb5ffc MD	202	fail:
bd252a04	203	URCU_TLS(nr_enqueues)++;
a0b7f7ea	204	if (caa_unlikely(!test_duration_enqueue()))
a5eb5ffc MD	205	break;
	206	}
	207
bd252a04 MD	208	count[0] = URCU_TLS(nr_enqueues);
bd252a04 MD	209	count[1] = URCU_TLS(nr_successful_enqueues);
a5eb5ffc MD	210	printf_verbose("enqueuer thread_end, thread id : %lx, tid %lu, "
a5eb5ffc MD	211	"enqueues %llu successful_enqueues %llu\n",
6ff854ac MD	212	pthread_self(),
6ff854ac MD	213	(unsigned long) gettid(),
bd252a04	214	URCU_TLS(nr_enqueues), URCU_TLS(nr_successful_enqueues));
a5eb5ffc MD	215	return ((void*)1);
	216
	217	}
	218
69328034 MD	219	static void do_test_pop(enum test_sync sync)
	220	{
	221	struct cds_wfs_node *node;
	222
	223	if (sync == TEST_SYNC_MUTEX)
	224	cds_wfs_pop_lock(&s);
	225	node = __cds_wfs_pop_blocking(&s);
	226	if (sync == TEST_SYNC_MUTEX)
	227	cds_wfs_pop_unlock(&s);
	228
	229	if (node) {
	230	free(node);
	231	URCU_TLS(nr_successful_dequeues)++;
	232	}
	233	URCU_TLS(nr_dequeues)++;
	234	}
	235
	236	static void do_test_pop_all(enum test_sync sync)
	237	{
	238	struct cds_wfs_head *head;
	239	struct cds_wfs_node node, n;
	240
	241	if (sync == TEST_SYNC_MUTEX)
	242	cds_wfs_pop_lock(&s);
	243	head = __cds_wfs_pop_all(&s);
	244	if (sync == TEST_SYNC_MUTEX)
	245	cds_wfs_pop_unlock(&s);
	246
	247	cds_wfs_for_each_blocking_safe(head, node, n) {
	248	free(node);
	249	URCU_TLS(nr_successful_dequeues)++;
	250	URCU_TLS(nr_dequeues)++;
	251	}
	252	}
	253
98fbc848	254	static void thr_dequeuer(void _count)
a5eb5ffc MD	255	{
a5eb5ffc MD	256	unsigned long long *count = _count;
69328034	257	unsigned int counter;
a5eb5ffc MD	258
a5eb5ffc MD	259	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
6ff854ac MD	260	"dequeuer", (unsigned long) pthread_self(),
6ff854ac MD	261	(unsigned long) gettid());
a5eb5ffc MD	262
	263	set_affinity();
	264
a5eb5ffc MD	265	while (!test_go)
	266	{
	267	}
5481ddb3	268	cmm_smp_mb();
a5eb5ffc	269
69328034	270	assert(test_pop \|\| test_pop_all);
a5eb5ffc	271
69328034 MD	272	for (;;) {
	273	if (test_pop && test_pop_all) {
	274	if (counter & 1)
	275	do_test_pop(test_sync);
	276	else
	277	do_test_pop_all(test_sync);
	278	counter++;
	279	} else {
	280	if (test_pop)
	281	do_test_pop(test_sync);
	282	else
	283	do_test_pop_all(test_sync);
a5eb5ffc MD	284	}
a5eb5ffc MD	285
a0b7f7ea	286	if (caa_unlikely(!test_duration_dequeue()))
a5eb5ffc	287	break;
a0b7f7ea	288	if (caa_unlikely(rduration))
a5eb5ffc MD	289	loop_sleep(rduration);
	290	}
	291
a5eb5ffc MD	292	printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
a5eb5ffc MD	293	"dequeues %llu, successful_dequeues %llu\n",
6ff854ac MD	294	pthread_self(),
6ff854ac MD	295	(unsigned long) gettid(),
bd252a04 MD	296	URCU_TLS(nr_dequeues), URCU_TLS(nr_successful_dequeues));
	297	count[0] = URCU_TLS(nr_dequeues);
	298	count[1] = URCU_TLS(nr_successful_dequeues);
a5eb5ffc MD	299	return ((void*)2);
	300	}
	301
98fbc848	302	static void test_end(struct cds_wfs_stack s, unsigned long long nr_dequeues)
a5eb5ffc	303	{
16aa9ee8	304	struct cds_wfs_node *node;
a5eb5ffc MD	305
a5eb5ffc MD	306	do {
16aa9ee8	307	node = cds_wfs_pop_blocking(s);
a5eb5ffc MD	308	if (node) {
	309	free(node);
	310	(*nr_dequeues)++;
	311	}
	312	} while (node);
	313	}
	314
98fbc848	315	static void show_usage(int argc, char **argv)
a5eb5ffc MD	316	{
	317	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s)", argv[0]);
	318	printf(" [-d delay] (enqueuer period (in loops))");
	319	printf(" [-c duration] (dequeuer period (in loops))");
	320	printf(" [-v] (verbose output)");
	321	printf(" [-a cpu#] [-a cpu#]... (affinity)");
69328034 MD	322	printf(" [-p] (test pop)");
	323	printf(" [-P] (test pop_all, enabled by default)");
	324	printf(" [-M] (use mutex external synchronization)");
	325	printf(" Note: default: no external synchronization used.");
0ee400bd	326	printf(" [-f] (force user-provided synchronization)");
a5eb5ffc MD	327	printf("\n");
	328	}
	329
	330	int main(int argc, char **argv)
	331	{
	332	int err;
	333	pthread_t tid_enqueuer, tid_dequeuer;
	334	void *tret;
	335	unsigned long long count_enqueuer, count_dequeuer;
	336	unsigned long long tot_enqueues = 0, tot_dequeues = 0;
	337	unsigned long long tot_successful_enqueues = 0,
	338	tot_successful_dequeues = 0;
	339	unsigned long long end_dequeues = 0;
	340	int i, a;
	341
	342	if (argc < 4) {
	343	show_usage(argc, argv);
	344	return -1;
	345	}
	346
	347	err = sscanf(argv[1], "%u", &nr_dequeuers);
	348	if (err != 1) {
	349	show_usage(argc, argv);
	350	return -1;
	351	}
	352
	353	err = sscanf(argv[2], "%u", &nr_enqueuers);
	354	if (err != 1) {
	355	show_usage(argc, argv);
	356	return -1;
	357	}
	358
	359	err = sscanf(argv[3], "%lu", &duration);
	360	if (err != 1) {
	361	show_usage(argc, argv);
	362	return -1;
	363	}
	364
	365	for (i = 4; i < argc; i++) {
	366	if (argv[i][0] != '-')
	367	continue;
	368	switch (argv[i][1]) {
	369	case 'a':
	370	if (argc < i + 2) {
	371	show_usage(argc, argv);
	372	return -1;
	373	}
	374	a = atoi(argv[++i]);
	375	cpu_affinities[next_aff++] = a;
	376	use_affinity = 1;
	377	printf_verbose("Adding CPU %d affinity\n", a);
	378	break;
	379	case 'c':
	380	if (argc < i + 2) {
	381	show_usage(argc, argv);
	382	return -1;
	383	}
	384	rduration = atol(argv[++i]);
	385	break;
	386	case 'd':
	387	if (argc < i + 2) {
	388	show_usage(argc, argv);
	389	return -1;
	390	}
391	wdelay = atol(argv[++i]);
392	break;
393	case 'v':
394	verbose_mode = 1;
395	break;
69328034 MD	396	case 'p':
	397	test_pop = 1;
	398	break;
	399	case 'P':
	400	test_pop_all = 1;
	401	break;
	402	case 'M':
	403	test_sync = TEST_SYNC_MUTEX;
	404	break;
0ee400bd MD	405	case 'f':
	406	test_force_sync = 1;
	407	break;
a5eb5ffc MD	408	}
	409	}
	410
69328034 MD	411	/* activate pop_all test by default */
	412	if (!test_pop && !test_pop_all)
	413	test_pop_all = 1;
	414
0ee400bd MD	415	if (test_sync == TEST_SYNC_NONE && nr_dequeuers > 1 && test_pop) {
	416	if (test_force_sync) {
	417	fprintf(stderr, "[WARNING] Using pop concurrently "
	418	"with other pop or pop_all without external "
	419	"synchronization. Expect run-time failure.\n");
	420	} else {
	421	printf("Enforcing mutex synchronization\n");
	422	test_sync = TEST_SYNC_MUTEX;
	423	}
	424	}
	425
a5eb5ffc MD	426	printf_verbose("running test for %lu seconds, %u enqueuers, "
	427	"%u dequeuers.\n",
	428	duration, nr_enqueuers, nr_dequeuers);
69328034 MD	429	if (test_pop)
	430	printf_verbose("pop test activated.\n");
	431	if (test_pop_all)
	432	printf_verbose("pop_all test activated.\n");
98fbc848 MD	433	if (test_sync == TEST_SYNC_MUTEX)
	434	printf_verbose("External sync: mutex.\n");
	435	else
	436	printf_verbose("External sync: none.\n");
a5eb5ffc MD	437	printf_verbose("Writer delay : %lu loops.\n", rduration);
	438	printf_verbose("Reader duration : %lu loops.\n", wdelay);
	439	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
6ff854ac MD	440	"main", (unsigned long) pthread_self(),
6ff854ac MD	441	(unsigned long) gettid());
a5eb5ffc MD	442
	443	tid_enqueuer = malloc(sizeof(tid_enqueuer) nr_enqueuers);
	444	tid_dequeuer = malloc(sizeof(tid_dequeuer) nr_dequeuers);
	445	count_enqueuer = malloc(2 * sizeof(count_enqueuer) nr_enqueuers);
	446	count_dequeuer = malloc(2 * sizeof(count_dequeuer) nr_dequeuers);
16aa9ee8	447	cds_wfs_init(&s);
a5eb5ffc MD	448
	449	next_aff = 0;
	450
	451	for (i = 0; i < nr_enqueuers; i++) {
	452	err = pthread_create(&tid_enqueuer[i], NULL, thr_enqueuer,
	453	&count_enqueuer[2 * i]);
	454	if (err != 0)
	455	exit(1);
	456	}
	457	for (i = 0; i < nr_dequeuers; i++) {
	458	err = pthread_create(&tid_dequeuer[i], NULL, thr_dequeuer,
	459	&count_dequeuer[2 * i]);
	460	if (err != 0)
	461	exit(1);
	462	}
	463
5481ddb3	464	cmm_smp_mb();
a5eb5ffc MD	465
	466	test_go = 1;
	467
	468	for (i = 0; i < duration; i++) {
	469	sleep(1);
	470	if (verbose_mode)
	471	write (1, ".", 1);
	472	}
	473
	474	test_stop = 1;
	475
	476	for (i = 0; i < nr_enqueuers; i++) {
	477	err = pthread_join(tid_enqueuer[i], &tret);
	478	if (err != 0)
	479	exit(1);
	480	tot_enqueues += count_enqueuer[2 * i];
	481	tot_successful_enqueues += count_enqueuer[2 * i + 1];
	482	}
	483	for (i = 0; i < nr_dequeuers; i++) {
	484	err = pthread_join(tid_dequeuer[i], &tret);
	485	if (err != 0)
	486	exit(1);
	487	tot_dequeues += count_dequeuer[2 * i];
	488	tot_successful_dequeues += count_dequeuer[2 * i + 1];
	489	}
	490
	491	test_end(&s, &end_dequeues);
	492
	493	printf_verbose("total number of enqueues : %llu, dequeues %llu\n",
	494	tot_enqueues, tot_dequeues);
	495	printf_verbose("total number of successful enqueues : %llu, "
	496	"successful dequeues %llu\n",
	497	tot_successful_enqueues, tot_successful_dequeues);
	498	printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu "
	499	"nr_dequeuers %3u "
	500	"rdur %6lu nr_enqueues %12llu nr_dequeues %12llu "
	501	"successful enqueues %12llu successful dequeues %12llu "
	502	"end_dequeues %llu nr_ops %12llu\n",
	503	argv[0], duration, nr_enqueuers, wdelay,
	504	nr_dequeuers, rduration, tot_enqueues, tot_dequeues,
	505	tot_successful_enqueues,
	506	tot_successful_dequeues, end_dequeues,
	507	tot_enqueues + tot_dequeues);
	508	if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues)
	509	printf("WARNING! Discrepancy between nr succ. enqueues %llu vs "
	510	"succ. dequeues + end dequeues %llu.\n",
	511	tot_successful_enqueues,
	512	tot_successful_dequeues + end_dequeues);
	513
	514	free(count_enqueuer);
	515	free(count_dequeuer);
	516	free(tid_enqueuer);
	517	free(tid_dequeuer);
	518	return 0;
	519	}