[urcu.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>

#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 unsigned long long __thread nr_dequeues;
static unsigned long long __thread nr_enqueues;

static unsigned long long __thread nr_successful_dequeues;
static unsigned long long __thread 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", 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);
		nr_successful_enqueues++;

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

	rcu_unregister_thread();

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