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

// SPDX-FileCopyrightText: 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
// SPDX-FileCopyrightText: 2010 Paolo Bonzini <pbonzini@redhat.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later

/*
 * Userspace RCU library - example lock-free stack
 */

#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 <errno.h>

#include <urcu/arch.h>
#include <urcu/assert.h>
#include <urcu/tls-compat.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)
{
#ifdef HAVE_SCHED_SETAFFINITY
	cpu_set_t mask;
	int cpu, ret;
#endif /* HAVE_SCHED_SETAFFINITY */

	if (!use_affinity)
		return;

#ifdef 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);
	sched_setaffinity(0, sizeof(mask), &mask);
#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();

	urcu_posix_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(unsigned long long *nr_dequeues_l)
{
	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_l)++;
		}
	} while (snode);
}

static void show_usage(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;
	unsigned int i_thr;

	if (argc < 4) {
		show_usage(argv);
		return -1;
	}

	err = sscanf(argv[1], "%u", &nr_dequeuers);
	if (err != 1) {
		show_usage(argv);
		return -1;
	}

	err = sscanf(argv[2], "%u", &nr_enqueuers);
	if (err != 1) {
		show_usage(argv);
		return -1;
	}

	err = sscanf(argv[3], "%lu", &duration);
	if (err != 1) {
		show_usage(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(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(argv);
				return -1;
			}
			rduration = atol(argv[++i]);
			break;
		case 'd':
			if (argc < i + 2) {
				show_usage(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_thr = 0; i_thr < nr_enqueuers; i_thr++) {
		err = pthread_create(&tid_enqueuer[i_thr], NULL, thr_enqueuer,
				     &count_enqueuer[2 * i_thr]);
		if (err != 0)
			exit(1);
	}
	for (i_thr = 0; i_thr < nr_dequeuers; i_thr++) {
		err = pthread_create(&tid_dequeuer[i_thr], NULL, thr_dequeuer,
				     &count_dequeuer[2 * i_thr]);
		if (err != 0)
			exit(1);
	}

	cmm_smp_mb();

	test_go = 1;

	for (i_thr = 0; i_thr < duration; i_thr++) {
		sleep(1);
		if (verbose_mode) {
			fwrite(".", sizeof(char), 1, stdout);
			fflush(stdout);
		}
	}

	test_stop = 1;

	for (i_thr = 0; i_thr < nr_enqueuers; i_thr++) {
		err = pthread_join(tid_enqueuer[i_thr], &tret);
		if (err != 0)
			exit(1);
		tot_enqueues += count_enqueuer[2 * i_thr];
		tot_successful_enqueues += count_enqueuer[2 * i_thr + 1];
	}
	for (i_thr = 0; i_thr < nr_dequeuers; i_thr++) {
		err = pthread_join(tid_dequeuer[i_thr], &tret);
		if (err != 0)
			exit(1);
		tot_dequeues += count_dequeuer[2 * i_thr];
		tot_successful_dequeues += count_dequeuer[2 * i_thr + 1];
	}

	test_end(&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
ce29b371 MJ	1	// SPDX-FileCopyrightText: 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	2	// SPDX-FileCopyrightText: 2010 Paolo Bonzini <pbonzini@redhat.com>
	3	//
	4	// SPDX-License-Identifier: GPL-2.0-or-later
	5
453629a9	6	/*
cb8818f0	7	* Userspace RCU library - example lock-free stack
453629a9 MD	8	*/
453629a9 MD	9
453629a9 MD	10	#include <stdio.h>
	11	#include <pthread.h>
	12	#include <stdlib.h>
	13	#include <stdint.h>
	14	#include <stdbool.h>
	15	#include <string.h>
	16	#include <sys/types.h>
	17	#include <sys/wait.h>
	18	#include <unistd.h>
	19	#include <stdio.h>
453629a9 MD	20	#include <errno.h>
	21
	22	#include <urcu/arch.h>
01477510	23	#include <urcu/assert.h>
bd252a04	24	#include <urcu/tls-compat.h>
94df6318	25	#include "thread-id.h"
65fcc7e9	26
453629a9 MD	27	/* hardcoded number of CPUs */
	28	#define NR_CPUS 16384
	29
453629a9 MD	30	#ifndef DYNAMIC_LINK_TEST
	31	#define _LGPL_SOURCE
	32	#endif
	33	#include <urcu.h>
e5a7d709	34	#include <urcu/cds.h>
453629a9	35
f9b5c2b6 MD	36	#define POISON_PTR ((void *) 0x42UL)
f9b5c2b6 MD	37
111ce0c3 MD	38	/*
	39	* External synchronization used.
	40	*/
	41	enum test_sync {
	42	TEST_SYNC_NONE = 0,
	43	TEST_SYNC_RCU,
	44	};
	45
	46	static enum test_sync test_sync;
	47
453629a9 MD	48	static volatile int test_go, test_stop;
	49
	50	static unsigned long rduration;
	51
	52	static unsigned long duration;
	53
	54	/* read-side C.S. duration, in loops */
	55	static unsigned long wdelay;
	56
ab0aacbe	57	static inline void loop_sleep(unsigned long loops)
453629a9	58	{
ab0aacbe	59	while (loops-- != 0)
06f22bdb	60	caa_cpu_relax();
453629a9 MD	61	}
	62
	63	static int verbose_mode;
	64
111ce0c3 MD	65	static int test_pop, test_pop_all;
111ce0c3 MD	66
453629a9 MD	67	#define printf_verbose(fmt, args...) \
	68	do { \
	69	if (verbose_mode) \
111ce0c3	70	printf(fmt, ## args); \
453629a9 MD	71	} while (0)
	72
	73	static unsigned int cpu_affinities[NR_CPUS];
	74	static unsigned int next_aff = 0;
	75	static int use_affinity = 0;
	76
	77	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	78
453629a9 MD	79	static void set_affinity(void)
453629a9 MD	80	{
2388c075	81	#ifdef HAVE_SCHED_SETAFFINITY
453629a9	82	cpu_set_t mask;
95bc7fb9 MD	83	int cpu, ret;
95bc7fb9 MD	84	#endif /* HAVE_SCHED_SETAFFINITY */
453629a9 MD	85
	86	if (!use_affinity)
	87	return;
	88
2388c075	89	#ifdef HAVE_SCHED_SETAFFINITY
453629a9 MD	90	ret = pthread_mutex_lock(&affinity_mutex);
	91	if (ret) {
	92	perror("Error in pthread mutex lock");
	93	exit(-1);
	94	}
	95	cpu = cpu_affinities[next_aff++];
	96	ret = pthread_mutex_unlock(&affinity_mutex);
	97	if (ret) {
	98	perror("Error in pthread mutex unlock");
	99	exit(-1);
	100	}
	101
	102	CPU_ZERO(&mask);
	103	CPU_SET(cpu, &mask);
453629a9	104	sched_setaffinity(0, sizeof(mask), &mask);
453629a9 MD	105	#endif /* HAVE_SCHED_SETAFFINITY */
	106	}
	107
	108	/*
	109	* returns 0 if test should end.
	110	*/
	111	static int test_duration_dequeue(void)
	112	{
	113	return !test_stop;
	114	}
	115
	116	static int test_duration_enqueue(void)
	117	{
	118	return !test_stop;
	119	}
	120
bd252a04 MD	121	static DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
bd252a04 MD	122	static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);
453629a9	123
bd252a04 MD	124	static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
bd252a04 MD	125	static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);
453629a9 MD	126
	127	static unsigned int nr_enqueuers;
	128	static unsigned int nr_dequeuers;
	129
94aec122	130	struct test {
cb8818f0	131	struct cds_lfs_node list;
94aec122 MD	132	struct rcu_head rcu;
	133	};
	134
cb8818f0	135	static struct cds_lfs_stack s;
453629a9	136
eb314468	137	static void thr_enqueuer(void _count)
453629a9 MD	138	{
	139	unsigned long long *count = _count;
	140
94df6318 MD	141	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	142	"enqueuer", urcu_get_thread_id());
453629a9 MD	143
	144	set_affinity();
	145
	146	rcu_register_thread();
	147
	148	while (!test_go)
	149	{
	150	}
5481ddb3	151	cmm_smp_mb();
453629a9 MD	152
453629a9 MD	153	for (;;) {
94aec122	154	struct test node = malloc(sizeof(node));
453629a9 MD	155	if (!node)
453629a9 MD	156	goto fail;
cb8818f0 MD	157	cds_lfs_node_init(&node->list);
cb8818f0 MD	158	cds_lfs_push(&s, &node->list);
bd252a04	159	URCU_TLS(nr_successful_enqueues)++;
453629a9	160
a0b7f7ea	161	if (caa_unlikely(wdelay))
453629a9 MD	162	loop_sleep(wdelay);
453629a9 MD	163	fail:
bd252a04	164	URCU_TLS(nr_enqueues)++;
a0b7f7ea	165	if (caa_unlikely(!test_duration_enqueue()))
453629a9 MD	166	break;
	167	}
	168
	169	rcu_unregister_thread();
	170
bd252a04 MD	171	count[0] = URCU_TLS(nr_enqueues);
bd252a04 MD	172	count[1] = URCU_TLS(nr_successful_enqueues);
94df6318 MD	173	printf_verbose("enqueuer thread_end, tid %lu, "
	174	"enqueues %llu successful_enqueues %llu\n",
	175	urcu_get_thread_id(),
	176	URCU_TLS(nr_enqueues),
	177	URCU_TLS(nr_successful_enqueues));
453629a9 MD	178	return ((void*)1);
	179
	180	}
	181
94aec122 MD	182	static
	183	void free_node_cb(struct rcu_head *head)
	184	{
	185	struct test *node =
	186	caa_container_of(head, struct test, rcu);
	187	free(node);
	188	}
	189
111ce0c3 MD	190	static
	191	void do_test_pop(enum test_sync sync)
	192	{
	193	struct cds_lfs_node *snode;
	194
	195	if (sync == TEST_SYNC_RCU)
	196	rcu_read_lock();
	197	snode = __cds_lfs_pop(&s);
	198	if (sync == TEST_SYNC_RCU)
	199	rcu_read_unlock();
	200	if (snode) {
	201	struct test *node;
	202
f9b5c2b6	203	snode->next = POISON_PTR;
111ce0c3 MD	204	node = caa_container_of(snode,
	205	struct test, list);
	206	if (sync == TEST_SYNC_RCU)
	207	call_rcu(&node->rcu, free_node_cb);
	208	else
	209	free(node);
	210	URCU_TLS(nr_successful_dequeues)++;
	211	}
	212	URCU_TLS(nr_dequeues)++;
	213	}
	214
	215	static
	216	void do_test_pop_all(enum test_sync sync)
	217	{
	218	struct cds_lfs_node *snode;
	219	struct cds_lfs_head *head;
	220	struct cds_lfs_node *n;
	221
	222	head = __cds_lfs_pop_all(&s);
	223	cds_lfs_for_each_safe(head, snode, n) {
	224	struct test *node;
	225
f9b5c2b6	226	snode->next = POISON_PTR;
111ce0c3 MD	227	node = caa_container_of(snode, struct test, list);
	228	if (sync == TEST_SYNC_RCU)
	229	call_rcu(&node->rcu, free_node_cb);
	230	else
	231	free(node);
	232	URCU_TLS(nr_successful_dequeues)++;
	233	URCU_TLS(nr_dequeues)++;
	234	}
	235
	236	}
	237
eb314468	238	static void thr_dequeuer(void _count)
453629a9 MD	239	{
453629a9 MD	240	unsigned long long *count = _count;
f42bc7ef	241	unsigned int counter = 0;
453629a9	242
94df6318 MD	243	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	244	"dequeuer", urcu_get_thread_id());
453629a9 MD	245
	246	set_affinity();
	247
453629a9 MD	248	rcu_register_thread();
	249
	250	while (!test_go)
	251	{
	252	}
5481ddb3	253	cmm_smp_mb();
453629a9	254
01477510	255	urcu_posix_assert(test_pop \|\| test_pop_all);
f3eb6ef1	256
111ce0c3	257	for (;;) {
111ce0c3 MD	258	if (test_pop && test_pop_all) {
	259	/* both pop and pop all */
	260	if (counter & 1)
	261	do_test_pop(test_sync);
	262	else
	263	do_test_pop_all(test_sync);
	264	counter++;
	265	} else {
	266	if (test_pop)
	267	do_test_pop(test_sync);
	268	else
	269	do_test_pop_all(test_sync);
453629a9	270	}
111ce0c3	271
a0b7f7ea	272	if (caa_unlikely(!test_duration_dequeue()))
453629a9	273	break;
a0b7f7ea	274	if (caa_unlikely(rduration))
453629a9 MD	275	loop_sleep(rduration);
	276	}
	277
	278	rcu_unregister_thread();
453629a9	279
94df6318 MD	280	printf_verbose("dequeuer thread_end, tid %lu, "
	281	"dequeues %llu, successful_dequeues %llu\n",
	282	urcu_get_thread_id(),
	283	URCU_TLS(nr_dequeues),
	284	URCU_TLS(nr_successful_dequeues));
bd252a04 MD	285	count[0] = URCU_TLS(nr_dequeues);
bd252a04 MD	286	count[1] = URCU_TLS(nr_successful_dequeues);
453629a9 MD	287	return ((void*)2);
	288	}
	289
bd23a6c6	290	static void test_end(unsigned long long *nr_dequeues_l)
453629a9	291	{
cb8818f0	292	struct cds_lfs_node *snode;
453629a9 MD	293
453629a9 MD	294	do {
bd23a6c6	295	snode = __cds_lfs_pop(&s);
94aec122 MD	296	if (snode) {
	297	struct test *node;
	298
	299	node = caa_container_of(snode, struct test, list);
453629a9	300	free(node);
bd23a6c6	301	(*nr_dequeues_l)++;
453629a9	302	}
94aec122	303	} while (snode);
453629a9 MD	304	}
453629a9 MD	305
70469b43	306	static void show_usage(char **argv)
453629a9	307	{
06637138 MD	308	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s) <OPTIONS>\n",
	309	argv[0]);
	310	printf("OPTIONS:\n");
	311	printf(" [-d delay] (enqueuer period (in loops))\n");
	312	printf(" [-c duration] (dequeuer period (in loops))\n");
	313	printf(" [-v] (verbose output)\n");
	314	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
	315	printf(" [-p] (test pop)\n");
	316	printf(" [-P] (test pop_all, enabled by default)\n");
	317	printf(" [-R] (use RCU external synchronization)\n");
	318	printf(" Note: default: no external synchronization used.\n");
453629a9 MD	319	printf("\n");
	320	}
	321
	322	int main(int argc, char **argv)
	323	{
	324	int err;
	325	pthread_t tid_enqueuer, tid_dequeuer;
	326	void *tret;
	327	unsigned long long count_enqueuer, count_dequeuer;
	328	unsigned long long tot_enqueues = 0, tot_dequeues = 0;
	329	unsigned long long tot_successful_enqueues = 0,
	330	tot_successful_dequeues = 0;
	331	unsigned long long end_dequeues = 0;
	332	int i, a;
83e334d0	333	unsigned int i_thr;
453629a9 MD	334
453629a9 MD	335	if (argc < 4) {
70469b43	336	show_usage(argv);
453629a9 MD	337	return -1;
	338	}
	339
	340	err = sscanf(argv[1], "%u", &nr_dequeuers);
	341	if (err != 1) {
70469b43	342	show_usage(argv);
453629a9 MD	343	return -1;
	344	}
	345
	346	err = sscanf(argv[2], "%u", &nr_enqueuers);
	347	if (err != 1) {
70469b43	348	show_usage(argv);
453629a9 MD	349	return -1;
453629a9 MD	350	}
83e334d0	351
453629a9 MD	352	err = sscanf(argv[3], "%lu", &duration);
453629a9 MD	353	if (err != 1) {
70469b43	354	show_usage(argv);
453629a9 MD	355	return -1;
	356	}
	357
	358	for (i = 4; i < argc; i++) {
	359	if (argv[i][0] != '-')
	360	continue;
	361	switch (argv[i][1]) {
	362	case 'a':
	363	if (argc < i + 2) {
70469b43	364	show_usage(argv);
453629a9 MD	365	return -1;
	366	}
	367	a = atoi(argv[++i]);
	368	cpu_affinities[next_aff++] = a;
	369	use_affinity = 1;
	370	printf_verbose("Adding CPU %d affinity\n", a);
	371	break;
	372	case 'c':
	373	if (argc < i + 2) {
70469b43	374	show_usage(argv);
453629a9 MD	375	return -1;
	376	}
	377	rduration = atol(argv[++i]);
	378	break;
	379	case 'd':
	380	if (argc < i + 2) {
70469b43	381	show_usage(argv);
453629a9 MD	382	return -1;
	383	}
	384	wdelay = atol(argv[++i]);
	385	break;
	386	case 'v':
	387	verbose_mode = 1;
	388	break;
111ce0c3 MD	389	case 'p':
	390	test_pop = 1;
	391	break;
	392	case 'P':
	393	test_pop_all = 1;
	394	break;
	395	case 'R':
	396	test_sync = TEST_SYNC_RCU;
	397	break;
453629a9 MD	398	}
	399	}
	400
111ce0c3 MD	401	/* activate pop_all test by default */
	402	if (!test_pop && !test_pop_all)
	403	test_pop_all = 1;
	404
453629a9 MD	405	printf_verbose("running test for %lu seconds, %u enqueuers, "
	406	"%u dequeuers.\n",
	407	duration, nr_enqueuers, nr_dequeuers);
111ce0c3 MD	408	if (test_pop)
	409	printf_verbose("pop test activated.\n");
	410	if (test_pop_all)
	411	printf_verbose("pop_all test activated.\n");
eb314468 MD	412	if (test_sync == TEST_SYNC_RCU)
	413	printf_verbose("External sync: RCU.\n");
	414	else
	415	printf_verbose("External sync: none.\n");
453629a9 MD	416	printf_verbose("Writer delay : %lu loops.\n", rduration);
453629a9 MD	417	printf_verbose("Reader duration : %lu loops.\n", wdelay);
94df6318 MD	418	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	419	"main", urcu_get_thread_id());
453629a9	420
9aa14175 MD	421	tid_enqueuer = calloc(nr_enqueuers, sizeof(*tid_enqueuer));
	422	tid_dequeuer = calloc(nr_dequeuers, sizeof(*tid_dequeuer));
	423	count_enqueuer = calloc(nr_enqueuers, 2 * sizeof(*count_enqueuer));
	424	count_dequeuer = calloc(nr_dequeuers, 2 * sizeof(*count_dequeuer));
cb8818f0	425	cds_lfs_init(&s);
94aec122	426	err = create_all_cpu_call_rcu_data(0);
8bcbd94a MD	427	if (err) {
	428	printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
	429	}
453629a9 MD	430
	431	next_aff = 0;
	432
83e334d0 MJ	433	for (i_thr = 0; i_thr < nr_enqueuers; i_thr++) {
	434	err = pthread_create(&tid_enqueuer[i_thr], NULL, thr_enqueuer,
	435	&count_enqueuer[2 * i_thr]);
453629a9 MD	436	if (err != 0)
	437	exit(1);
	438	}
83e334d0 MJ	439	for (i_thr = 0; i_thr < nr_dequeuers; i_thr++) {
	440	err = pthread_create(&tid_dequeuer[i_thr], NULL, thr_dequeuer,
	441	&count_dequeuer[2 * i_thr]);
453629a9 MD	442	if (err != 0)
	443	exit(1);
	444	}
	445
5481ddb3	446	cmm_smp_mb();
453629a9 MD	447
	448	test_go = 1;
	449
83e334d0	450	for (i_thr = 0; i_thr < duration; i_thr++) {
453629a9	451	sleep(1);
4b665350 MD	452	if (verbose_mode) {
	453	fwrite(".", sizeof(char), 1, stdout);
	454	fflush(stdout);
	455	}
453629a9 MD	456	}
	457
	458	test_stop = 1;
	459
83e334d0 MJ	460	for (i_thr = 0; i_thr < nr_enqueuers; i_thr++) {
83e334d0 MJ	461	err = pthread_join(tid_enqueuer[i_thr], &tret);
453629a9 MD	462	if (err != 0)
453629a9 MD	463	exit(1);
83e334d0 MJ	464	tot_enqueues += count_enqueuer[2 * i_thr];
83e334d0 MJ	465	tot_successful_enqueues += count_enqueuer[2 * i_thr + 1];
453629a9	466	}
83e334d0 MJ	467	for (i_thr = 0; i_thr < nr_dequeuers; i_thr++) {
83e334d0 MJ	468	err = pthread_join(tid_dequeuer[i_thr], &tret);
453629a9 MD	469	if (err != 0)
453629a9 MD	470	exit(1);
83e334d0 MJ	471	tot_dequeues += count_dequeuer[2 * i_thr];
83e334d0 MJ	472	tot_successful_dequeues += count_dequeuer[2 * i_thr + 1];
453629a9	473	}
83e334d0	474
bd23a6c6	475	test_end(&end_dequeues);
453629a9 MD	476
	477	printf_verbose("total number of enqueues : %llu, dequeues %llu\n",
	478	tot_enqueues, tot_dequeues);
	479	printf_verbose("total number of successful enqueues : %llu, "
	480	"successful dequeues %llu\n",
	481	tot_successful_enqueues, tot_successful_dequeues);
	482	printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu "
	483	"nr_dequeuers %3u "
	484	"rdur %6lu nr_enqueues %12llu nr_dequeues %12llu "
	485	"successful enqueues %12llu successful dequeues %12llu "
	486	"end_dequeues %llu nr_ops %12llu\n",
	487	argv[0], duration, nr_enqueuers, wdelay,
	488	nr_dequeuers, rduration, tot_enqueues, tot_dequeues,
	489	tot_successful_enqueues,
	490	tot_successful_dequeues, end_dequeues,
	491	tot_enqueues + tot_dequeues);
	492	if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues)
	493	printf("WARNING! Discrepancy between nr succ. enqueues %llu vs "
	494	"succ. dequeues + end dequeues %llu.\n",
	495	tot_successful_enqueues,
	496	tot_successful_dequeues + end_dequeues);
	497
0938c541	498	free_all_cpu_call_rcu_data();
2af1c19e	499	cds_lfs_destroy(&s);
453629a9 MD	500	free(count_enqueuer);
	501	free(count_dequeuer);
	502	free(tid_enqueuer);
	503	free(tid_dequeuer);
83e334d0	504
453629a9 MD	505	return 0;
453629a9 MD	506	}