[userspace-rcu.git] / tests / test_urcu_lfs.c

/*
 * test_urcu_lfs.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/cds.h>
#include <urcu-defer.h>

static volatile int test_go, test_stop;

static unsigned long rduration;

static unsigned long duration;

/* read-side C.S. duration, in loops */
static unsigned long wdelay;

static inline void loop_sleep(unsigned long l)
{
	while(l-- != 0)
		caa_cpu_relax();
}

static int verbose_mode;

#define printf_verbose(fmt, args...)		\
	do {					\
		if (verbose_mode)		\
			printf(fmt, args);	\
	} while (0)

static unsigned int cpu_affinities[NR_CPUS];
static unsigned int next_aff = 0;
static int use_affinity = 0;

pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;

#ifndef HAVE_CPU_SET_T
typedef unsigned long cpu_set_t;
# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
#endif

static void set_affinity(void)
{
	cpu_set_t mask;
	int cpu;
	int ret;

	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_rcu list;
	struct rcu_head rcu;
};

static struct cds_lfs_stack_rcu s;

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

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

	set_affinity();

	rcu_register_thread();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		struct test *node = malloc(sizeof(*node));
		if (!node)
			goto fail;
		cds_lfs_node_init_rcu(&node->list);
		/* No rcu read-side is needed for push */
		cds_lfs_push_rcu(&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, thread id : %lx, tid %lu, "
		       "enqueues %llu successful_enqueues %llu\n",
		       pthread_self(),
			(unsigned long) gettid(),
		       URCU_TLS(nr_enqueues), URCU_TLS(nr_successful_enqueues));
	return ((void*)1);

}

static
void free_node_cb(struct rcu_head *head)
{
	struct test *node =
		caa_container_of(head, struct test, rcu);
	free(node);
}

void *thr_dequeuer(void *_count)
{
	unsigned long long *count = _count;
	int ret;

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

	set_affinity();

	ret = rcu_defer_register_thread();
	if (ret) {
		printf("Error in rcu_defer_register_thread\n");
		exit(-1);
	}
	rcu_register_thread();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		struct cds_lfs_node_rcu *snode;
		struct test *node;

		rcu_read_lock();
		snode = cds_lfs_pop_rcu(&s);
		node = caa_container_of(snode, struct test, list);
		rcu_read_unlock();
		if (node) {
			call_rcu(&node->rcu, free_node_cb);
			URCU_TLS(nr_successful_dequeues)++;
		}
		URCU_TLS(nr_dequeues)++;
		if (caa_unlikely(!test_duration_dequeue()))
			break;
		if (caa_unlikely(rduration))
			loop_sleep(rduration);
	}

	rcu_unregister_thread();
	rcu_defer_unregister_thread();

	printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
		       "dequeues %llu, successful_dequeues %llu\n",
		       pthread_self(),
			(unsigned long) gettid(),
		       URCU_TLS(nr_dequeues), URCU_TLS(nr_successful_dequeues));
	count[0] = URCU_TLS(nr_dequeues);
	count[1] = URCU_TLS(nr_successful_dequeues);
	return ((void*)2);
}

void test_end(struct cds_lfs_stack_rcu *s, unsigned long long *nr_dequeues)
{
	struct cds_lfs_node_rcu *snode;

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

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

void show_usage(int argc, char **argv)
{
	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s)", argv[0]);
	printf(" [-d delay] (enqueuer period (in loops))");
	printf(" [-c duration] (dequeuer period (in loops))");
	printf(" [-v] (verbose output)");
	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	printf("\n");
}

int main(int argc, char **argv)
{
	int err;
	pthread_t *tid_enqueuer, *tid_dequeuer;
	void *tret;
	unsigned long long *count_enqueuer, *count_dequeuer;
	unsigned long long tot_enqueues = 0, tot_dequeues = 0;
	unsigned long long tot_successful_enqueues = 0,
			   tot_successful_dequeues = 0;
	unsigned long long end_dequeues = 0;
	int i, a;

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

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

	err = sscanf(argv[2], "%u", &nr_enqueuers);
	if (err != 1) {
		show_usage(argc, argv);
		return -1;
	}
	
	err = sscanf(argv[3], "%lu", &duration);
	if (err != 1) {
		show_usage(argc, argv);
		return -1;
	}

	for (i = 4; i < argc; i++) {
		if (argv[i][0] != '-')
			continue;
		switch (argv[i][1]) {
		case 'a':
			if (argc < i + 2) {
				show_usage(argc, argv);
				return -1;
			}
			a = atoi(argv[++i]);
			cpu_affinities[next_aff++] = a;
			use_affinity = 1;
			printf_verbose("Adding CPU %d affinity\n", a);
			break;
		case 'c':
			if (argc < i + 2) {
				show_usage(argc, argv);
				return -1;
			}
			rduration = atol(argv[++i]);
			break;
		case 'd':
			if (argc < i + 2) {
				show_usage(argc, argv);
				return -1;
			}
			wdelay = atol(argv[++i]);
			break;
		case 'v':
			verbose_mode = 1;
			break;
		}
	}

	printf_verbose("running test for %lu seconds, %u enqueuers, "
		       "%u dequeuers.\n",
		       duration, nr_enqueuers, nr_dequeuers);
	printf_verbose("Writer delay : %lu loops.\n", rduration);
	printf_verbose("Reader duration : %lu loops.\n", wdelay);
	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
			"main", (unsigned long) pthread_self(),
			(unsigned long) gettid());

	tid_enqueuer = malloc(sizeof(*tid_enqueuer) * nr_enqueuers);
	tid_dequeuer = malloc(sizeof(*tid_dequeuer) * nr_dequeuers);
	count_enqueuer = malloc(2 * sizeof(*count_enqueuer) * nr_enqueuers);
	count_dequeuer = malloc(2 * sizeof(*count_dequeuer) * nr_dequeuers);
	cds_lfs_init_rcu(&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)
			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_all_cpu_call_rcu_data();
	free(count_enqueuer);
	free(count_dequeuer);
	free(tid_enqueuer);
	free(tid_dequeuer);
	return 0;
}
Commit	Line	Data
453629a9 MD	1	/*
	2	* test_urcu_lfs.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>
453629a9 MD	37	#include <sched.h>
	38	#include <errno.h>
	39
	40	#include <urcu/arch.h>
bd252a04	41	#include <urcu/tls-compat.h>
453629a9	42
65fcc7e9 MD	43	#ifdef __linux__
	44	#include <syscall.h>
	45	#endif
	46
453629a9 MD	47	/* hardcoded number of CPUs */
	48	#define NR_CPUS 16384
	49
	50	#if defined(_syscall0)
	51	_syscall0(pid_t, gettid)
	52	#elif defined(__NR_gettid)
	53	static inline pid_t gettid(void)
	54	{
	55	return syscall(__NR_gettid);
	56	}
	57	#else
	58	#warning "use pid as tid"
	59	static inline pid_t gettid(void)
	60	{
	61	return getpid();
	62	}
	63	#endif
	64
	65	#ifndef DYNAMIC_LINK_TEST
	66	#define _LGPL_SOURCE
	67	#endif
	68	#include <urcu.h>
e5a7d709	69	#include <urcu/cds.h>
453629a9 MD	70	#include <urcu-defer.h>
	71
	72	static volatile int test_go, test_stop;
	73
	74	static unsigned long rduration;
	75
	76	static unsigned long duration;
	77
	78	/* read-side C.S. duration, in loops */
	79	static unsigned long wdelay;
	80
	81	static inline void loop_sleep(unsigned long l)
	82	{
	83	while(l-- != 0)
06f22bdb	84	caa_cpu_relax();
453629a9 MD	85	}
	86
	87	static int verbose_mode;
	88
	89	#define printf_verbose(fmt, args...) \
	90	do { \
	91	if (verbose_mode) \
	92	printf(fmt, args); \
	93	} while (0)
	94
	95	static unsigned int cpu_affinities[NR_CPUS];
	96	static unsigned int next_aff = 0;
	97	static int use_affinity = 0;
	98
	99	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	100
	101	#ifndef HAVE_CPU_SET_T
	102	typedef unsigned long cpu_set_t;
	103	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	104	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	105	#endif
	106
	107	static void set_affinity(void)
	108	{
	109	cpu_set_t mask;
	110	int cpu;
	111	int ret;
	112
	113	if (!use_affinity)
	114	return;
	115
	116	#if HAVE_SCHED_SETAFFINITY
	117	ret = pthread_mutex_lock(&affinity_mutex);
	118	if (ret) {
	119	perror("Error in pthread mutex lock");
	120	exit(-1);
	121	}
	122	cpu = cpu_affinities[next_aff++];
	123	ret = pthread_mutex_unlock(&affinity_mutex);
	124	if (ret) {
	125	perror("Error in pthread mutex unlock");
	126	exit(-1);
	127	}
	128
	129	CPU_ZERO(&mask);
	130	CPU_SET(cpu, &mask);
	131	#if SCHED_SETAFFINITY_ARGS == 2
	132	sched_setaffinity(0, &mask);
	133	#else
	134	sched_setaffinity(0, sizeof(mask), &mask);
	135	#endif
	136	#endif /* HAVE_SCHED_SETAFFINITY */
	137	}
	138
	139	/*
	140	* returns 0 if test should end.
	141	*/
	142	static int test_duration_dequeue(void)
	143	{
	144	return !test_stop;
	145	}
	146
	147	static int test_duration_enqueue(void)
	148	{
149	return !test_stop;
150	}
151
bd252a04 MD	152	static DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
bd252a04 MD	153	static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);
453629a9	154
bd252a04 MD	155	static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
bd252a04 MD	156	static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);
453629a9 MD	157
	158	static unsigned int nr_enqueuers;
	159	static unsigned int nr_dequeuers;
	160
94aec122 MD	161	struct test {
	162	struct cds_lfs_node_rcu list;
	163	struct rcu_head rcu;
	164	};
	165
16aa9ee8	166	static struct cds_lfs_stack_rcu s;
453629a9 MD	167
	168	void thr_enqueuer(void _count)
	169	{
	170	unsigned long long *count = _count;
	171
	172	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
2d72fae2 MD	173	"enqueuer", (unsigned long) pthread_self(),
2d72fae2 MD	174	(unsigned long) gettid());
453629a9 MD	175
	176	set_affinity();
	177
	178	rcu_register_thread();
	179
	180	while (!test_go)
	181	{
	182	}
5481ddb3	183	cmm_smp_mb();
453629a9 MD	184
453629a9 MD	185	for (;;) {
94aec122	186	struct test node = malloc(sizeof(node));
453629a9 MD	187	if (!node)
453629a9 MD	188	goto fail;
94aec122	189	cds_lfs_node_init_rcu(&node->list);
d9b52143	190	/* No rcu read-side is needed for push */
94aec122	191	cds_lfs_push_rcu(&s, &node->list);
bd252a04	192	URCU_TLS(nr_successful_enqueues)++;
453629a9	193
a0b7f7ea	194	if (caa_unlikely(wdelay))
453629a9 MD	195	loop_sleep(wdelay);
453629a9 MD	196	fail:
bd252a04	197	URCU_TLS(nr_enqueues)++;
a0b7f7ea	198	if (caa_unlikely(!test_duration_enqueue()))
453629a9 MD	199	break;
	200	}
	201
	202	rcu_unregister_thread();
	203
bd252a04 MD	204	count[0] = URCU_TLS(nr_enqueues);
bd252a04 MD	205	count[1] = URCU_TLS(nr_successful_enqueues);
453629a9 MD	206	printf_verbose("enqueuer thread_end, thread id : %lx, tid %lu, "
453629a9 MD	207	"enqueues %llu successful_enqueues %llu\n",
2d72fae2 MD	208	pthread_self(),
2d72fae2 MD	209	(unsigned long) gettid(),
bd252a04	210	URCU_TLS(nr_enqueues), URCU_TLS(nr_successful_enqueues));
453629a9 MD	211	return ((void*)1);
	212
	213	}
	214
94aec122 MD	215	static
	216	void free_node_cb(struct rcu_head *head)
	217	{
	218	struct test *node =
	219	caa_container_of(head, struct test, rcu);
	220	free(node);
	221	}
	222
453629a9 MD	223	void thr_dequeuer(void _count)
	224	{
	225	unsigned long long *count = _count;
9bfaf0ca	226	int ret;
453629a9 MD	227
453629a9 MD	228	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
2d72fae2 MD	229	"dequeuer", (unsigned long) pthread_self(),
2d72fae2 MD	230	(unsigned long) gettid());
453629a9 MD	231
	232	set_affinity();
	233
6ade67d5 MD	234	ret = rcu_defer_register_thread();
	235	if (ret) {
	236	printf("Error in rcu_defer_register_thread\n");
	237	exit(-1);
	238	}
453629a9 MD	239	rcu_register_thread();
	240
	241	while (!test_go)
	242	{
	243	}
5481ddb3	244	cmm_smp_mb();
453629a9 MD	245
453629a9 MD	246	for (;;) {
94aec122 MD	247	struct cds_lfs_node_rcu *snode;
94aec122 MD	248	struct test *node;
453629a9	249
6e5f88cf	250	rcu_read_lock();
94aec122 MD	251	snode = cds_lfs_pop_rcu(&s);
94aec122 MD	252	node = caa_container_of(snode, struct test, list);
6e5f88cf	253	rcu_read_unlock();
453629a9	254	if (node) {
94aec122	255	call_rcu(&node->rcu, free_node_cb);
bd252a04	256	URCU_TLS(nr_successful_dequeues)++;
453629a9	257	}
bd252a04	258	URCU_TLS(nr_dequeues)++;
a0b7f7ea	259	if (caa_unlikely(!test_duration_dequeue()))
453629a9	260	break;
a0b7f7ea	261	if (caa_unlikely(rduration))
453629a9 MD	262	loop_sleep(rduration);
	263	}
	264
	265	rcu_unregister_thread();
	266	rcu_defer_unregister_thread();
	267
	268	printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
	269	"dequeues %llu, successful_dequeues %llu\n",
2d72fae2 MD	270	pthread_self(),
2d72fae2 MD	271	(unsigned long) gettid(),
bd252a04 MD	272	URCU_TLS(nr_dequeues), URCU_TLS(nr_successful_dequeues));
	273	count[0] = URCU_TLS(nr_dequeues);
	274	count[1] = URCU_TLS(nr_successful_dequeues);
453629a9 MD	275	return ((void*)2);
	276	}
	277
16aa9ee8	278	void test_end(struct cds_lfs_stack_rcu s, unsigned long long nr_dequeues)
453629a9	279	{
94aec122	280	struct cds_lfs_node_rcu *snode;
453629a9 MD	281
453629a9 MD	282	do {
94aec122 MD	283	snode = cds_lfs_pop_rcu(s);
	284	if (snode) {
	285	struct test *node;
	286
	287	node = caa_container_of(snode, struct test, list);
453629a9 MD	288	free(node);
	289	(*nr_dequeues)++;
	290	}
94aec122	291	} while (snode);
453629a9 MD	292	}
	293
	294	void show_usage(int argc, char **argv)
	295	{
	296	printf("Usage : %s nr_dequeuers nr_enqueuers duration (s)", argv[0]);
	297	printf(" [-d delay] (enqueuer period (in loops))");
	298	printf(" [-c duration] (dequeuer period (in loops))");
	299	printf(" [-v] (verbose output)");
	300	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	301	printf("\n");
	302	}
	303
	304	int main(int argc, char **argv)
	305	{
	306	int err;
	307	pthread_t tid_enqueuer, tid_dequeuer;
	308	void *tret;
	309	unsigned long long count_enqueuer, count_dequeuer;
	310	unsigned long long tot_enqueues = 0, tot_dequeues = 0;
	311	unsigned long long tot_successful_enqueues = 0,
	312	tot_successful_dequeues = 0;
	313	unsigned long long end_dequeues = 0;
	314	int i, a;
	315
	316	if (argc < 4) {
	317	show_usage(argc, argv);
	318	return -1;
	319	}
	320
	321	err = sscanf(argv[1], "%u", &nr_dequeuers);
	322	if (err != 1) {
	323	show_usage(argc, argv);
	324	return -1;
	325	}
	326
	327	err = sscanf(argv[2], "%u", &nr_enqueuers);
	328	if (err != 1) {
	329	show_usage(argc, argv);
	330	return -1;
	331	}
	332
	333	err = sscanf(argv[3], "%lu", &duration);
	334	if (err != 1) {
	335	show_usage(argc, argv);
	336	return -1;
	337	}
	338
	339	for (i = 4; i < argc; i++) {
	340	if (argv[i][0] != '-')
	341	continue;
	342	switch (argv[i][1]) {
	343	case 'a':
	344	if (argc < i + 2) {
	345	show_usage(argc, argv);
	346	return -1;
	347	}
	348	a = atoi(argv[++i]);
	349	cpu_affinities[next_aff++] = a;
	350	use_affinity = 1;
	351	printf_verbose("Adding CPU %d affinity\n", a);
	352	break;
	353	case 'c':
	354	if (argc < i + 2) {
	355	show_usage(argc, argv);
356	return -1;
357	}
358	rduration = atol(argv[++i]);
359	break;
360	case 'd':
361	if (argc < i + 2) {
362	show_usage(argc, argv);
363	return -1;
364	}
365	wdelay = atol(argv[++i]);
366	break;
367	case 'v':
368	verbose_mode = 1;
369	break;
370	}
371	}
372
373	printf_verbose("running test for %lu seconds, %u enqueuers, "
374	"%u dequeuers.\n",
375	duration, nr_enqueuers, nr_dequeuers);
376	printf_verbose("Writer delay : %lu loops.\n", rduration);
377	printf_verbose("Reader duration : %lu loops.\n", wdelay);
378	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
2d72fae2 MD	379	"main", (unsigned long) pthread_self(),
2d72fae2 MD	380	(unsigned long) gettid());
453629a9 MD	381
	382	tid_enqueuer = malloc(sizeof(tid_enqueuer) nr_enqueuers);
	383	tid_dequeuer = malloc(sizeof(tid_dequeuer) nr_dequeuers);
	384	count_enqueuer = malloc(2 * sizeof(count_enqueuer) nr_enqueuers);
	385	count_dequeuer = malloc(2 * sizeof(count_dequeuer) nr_dequeuers);
16aa9ee8	386	cds_lfs_init_rcu(&s);
94aec122	387	err = create_all_cpu_call_rcu_data(0);
8bcbd94a MD	388	if (err) {
	389	printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
	390	}
453629a9 MD	391
	392	next_aff = 0;
	393
	394	for (i = 0; i < nr_enqueuers; i++) {
	395	err = pthread_create(&tid_enqueuer[i], NULL, thr_enqueuer,
	396	&count_enqueuer[2 * i]);
	397	if (err != 0)
	398	exit(1);
	399	}
	400	for (i = 0; i < nr_dequeuers; i++) {
	401	err = pthread_create(&tid_dequeuer[i], NULL, thr_dequeuer,
	402	&count_dequeuer[2 * i]);
	403	if (err != 0)
	404	exit(1);
	405	}
	406
5481ddb3	407	cmm_smp_mb();
453629a9 MD	408
	409	test_go = 1;
	410
	411	for (i = 0; i < duration; i++) {
	412	sleep(1);
	413	if (verbose_mode)
	414	write (1, ".", 1);
	415	}
	416
	417	test_stop = 1;
	418
	419	for (i = 0; i < nr_enqueuers; i++) {
	420	err = pthread_join(tid_enqueuer[i], &tret);
	421	if (err != 0)
	422	exit(1);
	423	tot_enqueues += count_enqueuer[2 * i];
	424	tot_successful_enqueues += count_enqueuer[2 * i + 1];
	425	}
	426	for (i = 0; i < nr_dequeuers; i++) {
	427	err = pthread_join(tid_dequeuer[i], &tret);
	428	if (err != 0)
	429	exit(1);
	430	tot_dequeues += count_dequeuer[2 * i];
	431	tot_successful_dequeues += count_dequeuer[2 * i + 1];
	432	}
	433
	434	test_end(&s, &end_dequeues);
	435
	436	printf_verbose("total number of enqueues : %llu, dequeues %llu\n",
	437	tot_enqueues, tot_dequeues);
	438	printf_verbose("total number of successful enqueues : %llu, "
	439	"successful dequeues %llu\n",
	440	tot_successful_enqueues, tot_successful_dequeues);
	441	printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu "
	442	"nr_dequeuers %3u "
	443	"rdur %6lu nr_enqueues %12llu nr_dequeues %12llu "
	444	"successful enqueues %12llu successful dequeues %12llu "
	445	"end_dequeues %llu nr_ops %12llu\n",
	446	argv[0], duration, nr_enqueuers, wdelay,
	447	nr_dequeuers, rduration, tot_enqueues, tot_dequeues,
	448	tot_successful_enqueues,
	449	tot_successful_dequeues, end_dequeues,
	450	tot_enqueues + tot_dequeues);
	451	if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues)
	452	printf("WARNING! Discrepancy between nr succ. enqueues %llu vs "
	453	"succ. dequeues + end dequeues %llu.\n",
	454	tot_successful_enqueues,
	455	tot_successful_dequeues + end_dequeues);
	456
0938c541	457	free_all_cpu_call_rcu_data();
453629a9 MD	458	free(count_enqueuer);
	459	free(count_dequeuer);
	460	free(tid_enqueuer);
	461	free(tid_dequeuer);
	462	return 0;
	463	}