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

/*
 * test_urcu.c
 *
 * Userspace RCU library - test program
 *
 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.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.
 */

#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>

#include <urcu/arch.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>

struct test_array {
	int a;
};

/*
 * static rwlock initializer is broken on Cygwin. Use runtime
 * initialization.
 */
pthread_rwlock_t lock;

static volatile int test_go, test_stop;

static unsigned long wdelay;

static volatile struct test_array test_array = { 8 };

static unsigned long duration;

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

/* write-side C.S. duration, in loops */
static unsigned long wduration;

static inline void loop_sleep(unsigned long loops)
{
	while (loops-- != 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;

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);
	sched_setaffinity(0, sizeof(mask), &mask);
#endif /* HAVE_SCHED_SETAFFINITY */
}

/*
 * returns 0 if test should end.
 */
static int test_duration_write(void)
{
	return !test_stop;
}

static int test_duration_read(void)
{
	return !test_stop;
}

static DEFINE_URCU_TLS(unsigned long long, nr_writes);
static DEFINE_URCU_TLS(unsigned long long, nr_reads);

static unsigned int nr_readers;
static unsigned int nr_writers;

pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;

static
void *thr_reader(void *_count)
{
	unsigned long long *count = _count;

	printf_verbose("thread_begin %s, tid %lu\n",
			"reader", urcu_get_thread_id());

	set_affinity();

	while (!test_go)
	{
	}

	for (;;) {
		int a, ret;

		ret = pthread_rwlock_rdlock(&lock);
		if (ret) {
			fprintf(stderr, "reader pthread_rwlock_rdlock: %s\n", strerror(ret));
			abort();
		}

		a = test_array.a;
		assert(a == 8);
		if (caa_unlikely(rduration))
			loop_sleep(rduration);

		ret = pthread_rwlock_unlock(&lock);
		if (ret) {
			fprintf(stderr, "reader pthread_rwlock_unlock: %s\n", strerror(ret));
			abort();
		}

		URCU_TLS(nr_reads)++;
		if (caa_unlikely(!test_duration_read()))
			break;
	}

	*count = URCU_TLS(nr_reads);

	printf_verbose("thread_end %s, tid %lu, count %llu\n",
			"reader", urcu_get_thread_id(), *count);
	return ((void*)1);

}

static
void *thr_writer(void *_count)
{
	unsigned long long *count = _count;

	printf_verbose("thread_begin %s, tid %lu\n",
			"writer", urcu_get_thread_id());

	set_affinity();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		int ret;

		ret = pthread_rwlock_wrlock(&lock);
		if (ret) {
			fprintf(stderr, "writer pthread_rwlock_wrlock: %s\n", strerror(ret));
			abort();
		}

		test_array.a = 0;
		test_array.a = 8;
		if (caa_unlikely(wduration))
			loop_sleep(wduration);

		ret = pthread_rwlock_unlock(&lock);
		if (ret) {
			fprintf(stderr, "writer pthread_rwlock_unlock: %s\n", strerror(ret));
			abort();
		}

		URCU_TLS(nr_writes)++;
		if (caa_unlikely(!test_duration_write()))
			break;
		if (caa_unlikely(wdelay))
			loop_sleep(wdelay);
	}
	*count = URCU_TLS(nr_writes);

	printf_verbose("thread_end %s, tid %lu, count %llu\n",
			"writer", urcu_get_thread_id(), *count);
	return ((void*)2);
}

static
void show_usage(char **argv)
{
	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
		argv[0]);
	printf("OPTIONS:\n");
	printf("	[-d delay] (writer period (us))\n");
	printf("	[-c duration] (reader C.S. duration (in loops))\n");
	printf("	[-e duration] (writer C.S. duration (in loops))\n");
	printf("	[-v] (verbose output)\n");
	printf("	[-a cpu#] [-a cpu#]... (affinity)\n");
	printf("\n");
}

int main(int argc, char **argv)
{
	int err;
	pthread_t *tid_reader, *tid_writer;
	void *tret;
	unsigned long long *count_reader, *count_writer;
	unsigned long long tot_reads = 0, tot_writes = 0;
	int i, a;
	unsigned int i_thr;

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

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

	err = sscanf(argv[2], "%u", &nr_writers);
	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 'e':
			if (argc < i + 2) {
				show_usage(argv);
				return -1;
			}
			wduration = atol(argv[++i]);
			break;
		case 'v':
			verbose_mode = 1;
			break;
		}
	}

	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
		duration, nr_readers, nr_writers);
	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	printf_verbose("Writer duration : %lu loops.\n", wduration);
	printf_verbose("Reader duration : %lu loops.\n", rduration);
	printf_verbose("thread %-6s, tid %lu\n",
			"main", urcu_get_thread_id());

	err = pthread_rwlock_init(&lock, NULL);
	if (err != 0) {
		fprintf(stderr, "pthread_rwlock_init: (%d) %s\n", err, strerror(err));
		exit(1);
	}

	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	count_reader = calloc(nr_readers, sizeof(*count_reader));
	count_writer = calloc(nr_writers, sizeof(*count_writer));

	next_aff = 0;

	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
		err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
				     &count_reader[i_thr]);
		if (err != 0)
			exit(1);
	}
	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
		err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
				     &count_writer[i_thr]);
		if (err != 0)
			exit(1);
	}

	cmm_smp_mb();

	test_go = 1;

	sleep(duration);

	test_stop = 1;

	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
		err = pthread_join(tid_reader[i_thr], &tret);
		if (err != 0)
			exit(1);
		tot_reads += count_reader[i_thr];
	}
	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
		err = pthread_join(tid_writer[i_thr], &tret);
		if (err != 0)
			exit(1);
		tot_writes += count_writer[i_thr];
	}

	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	       tot_writes);
	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
		"nr_writers %3u "
		"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
		argv[0], duration, nr_readers, rduration, wduration,
		nr_writers, wdelay, tot_reads, tot_writes,
		tot_reads + tot_writes);

	err = pthread_rwlock_destroy(&lock);
	if (err != 0) {
		fprintf(stderr, "pthread_rwlock_destroy: (%d) %s\n", err, strerror(err));
		exit(1);
	}
	free(tid_reader);
	free(tid_writer);
	free(count_reader);
	free(count_writer);
	return 0;
}
Commit	Line	Data
10c48e14 MD	1	/*
	2	* test_urcu.c
	3	*
	4	* Userspace RCU library - test program
	5	*
6982d6d7	6	* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10c48e14 MD	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, write to the Free Software Foundation, Inc.,
	20	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	21	*/
	22
	23	#include <stdio.h>
	24	#include <pthread.h>
	25	#include <stdlib.h>
	26	#include <string.h>
	27	#include <sys/types.h>
	28	#include <sys/wait.h>
	29	#include <unistd.h>
	30	#include <stdio.h>
	31	#include <assert.h>
94b343fd	32	#include <errno.h>
10c48e14	33
ec4e58a3	34	#include <urcu/arch.h>
bd252a04	35	#include <urcu/tls-compat.h>
94df6318	36	#include "thread-id.h"
65fcc7e9	37
2a7ac59d MD	38	/* hardcoded number of CPUs */
	39	#define NR_CPUS 16384
	40
10c48e14 MD	41	#ifndef DYNAMIC_LINK_TEST
10c48e14 MD	42	#define _LGPL_SOURCE
10c48e14	43	#endif
ec4e58a3	44	#include <urcu.h>
10c48e14 MD	45
	46	struct test_array {
	47	int a;
	48	};
	49
89a6a9ce MJ	50	/*
	51	* static rwlock initializer is broken on Cygwin. Use runtime
	52	* initialization.
	53	*/
	54	pthread_rwlock_t lock;
10c48e14	55
78efb485	56	static volatile int test_go, test_stop;
10c48e14	57
9e31d0f0	58	static unsigned long wdelay;
10c48e14	59
2b4e4125	60	static volatile struct test_array test_array = { 8 };
10c48e14 MD	61
10c48e14 MD	62	static unsigned long duration;
10c48e14	63
daddf5b0	64	/* read-side C.S. duration, in loops */
8b632bab MD	65	static unsigned long rduration;
8b632bab MD	66
31b598e0 MD	67	/* write-side C.S. duration, in loops */
	68	static unsigned long wduration;
	69
ab0aacbe	70	static inline void loop_sleep(unsigned long loops)
daddf5b0	71	{
ab0aacbe	72	while (loops-- != 0)
06f22bdb	73	caa_cpu_relax();
daddf5b0 MD	74	}
daddf5b0 MD	75
4bad7d45 MD	76	static int verbose_mode;
	77
	78	#define printf_verbose(fmt, args...) \
	79	do { \
	80	if (verbose_mode) \
	81	printf(fmt, args); \
	82	} while (0)
	83
2a7ac59d MD	84	static unsigned int cpu_affinities[NR_CPUS];
	85	static unsigned int next_aff = 0;
	86	static int use_affinity = 0;
	87
6af882ba MD	88	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	89
2a7ac59d MD	90	static void set_affinity(void)
2a7ac59d MD	91	{
95bc7fb9	92	#if HAVE_SCHED_SETAFFINITY
2a7ac59d	93	cpu_set_t mask;
95bc7fb9 MD	94	int cpu, ret;
95bc7fb9 MD	95	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	96
	97	if (!use_affinity)
	98	return;
	99
d8540fc5	100	#if HAVE_SCHED_SETAFFINITY
6af882ba MD	101	ret = pthread_mutex_lock(&affinity_mutex);
	102	if (ret) {
	103	perror("Error in pthread mutex lock");
	104	exit(-1);
	105	}
2a7ac59d	106	cpu = cpu_affinities[next_aff++];
6af882ba MD	107	ret = pthread_mutex_unlock(&affinity_mutex);
	108	if (ret) {
	109	perror("Error in pthread mutex unlock");
	110	exit(-1);
	111	}
d8540fc5	112
2a7ac59d MD	113	CPU_ZERO(&mask);
	114	CPU_SET(cpu, &mask);
	115	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5	116	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	117	}
2a7ac59d MD	118
10c48e14 MD	119	/*
	120	* returns 0 if test should end.
	121	*/
	122	static int test_duration_write(void)
	123	{
78efb485	124	return !test_stop;
10c48e14 MD	125	}
	126
	127	static int test_duration_read(void)
	128	{
78efb485	129	return !test_stop;
10c48e14 MD	130	}
10c48e14 MD	131
bd252a04 MD	132	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	133	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
10c48e14 MD	134
	135	static unsigned int nr_readers;
	136	static unsigned int nr_writers;
	137
	138	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	139
61c3fb60	140	static
10c48e14 MD	141	void thr_reader(void _count)
	142	{
	143	unsigned long long *count = _count;
	144
94df6318 MD	145	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	146	"reader", urcu_get_thread_id());
10c48e14	147
2a7ac59d MD	148	set_affinity();
2a7ac59d MD	149
10c48e14 MD	150	while (!test_go)
	151	{
	152	}
	153
	154	for (;;) {
89a6a9ce MJ	155	int a, ret;
	156
	157	ret = pthread_rwlock_rdlock(&lock);
	158	if (ret) {
	159	fprintf(stderr, "reader pthread_rwlock_rdlock: %s\n", strerror(ret));
	160	abort();
	161	}
efa8d2c8	162
efa8d2c8 MD	163	a = test_array.a;
efa8d2c8 MD	164	assert(a == 8);
a0b7f7ea	165	if (caa_unlikely(rduration))
daddf5b0	166	loop_sleep(rduration);
89a6a9ce MJ	167
	168	ret = pthread_rwlock_unlock(&lock);
	169	if (ret) {
	170	fprintf(stderr, "reader pthread_rwlock_unlock: %s\n", strerror(ret));
	171	abort();
	172	}
	173
bd252a04	174	URCU_TLS(nr_reads)++;
a0b7f7ea	175	if (caa_unlikely(!test_duration_read()))
10c48e14 MD	176	break;
	177	}
	178
bd252a04	179	*count = URCU_TLS(nr_reads);
aae4fe1d MJ	180
	181	printf_verbose("thread_end %s, tid %lu, count %llu\n",
	182	"reader", urcu_get_thread_id(), *count);
10c48e14 MD	183	return ((void*)1);
	184
	185	}
	186
61c3fb60	187	static
10c48e14 MD	188	void thr_writer(void _count)
	189	{
	190	unsigned long long *count = _count;
	191
94df6318 MD	192	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	193	"writer", urcu_get_thread_id());
10c48e14	194
2a7ac59d MD	195	set_affinity();
2a7ac59d MD	196
10c48e14 MD	197	while (!test_go)
	198	{
	199	}
5481ddb3	200	cmm_smp_mb();
10c48e14 MD	201
10c48e14 MD	202	for (;;) {
89a6a9ce MJ	203	int ret;
	204
	205	ret = pthread_rwlock_wrlock(&lock);
	206	if (ret) {
	207	fprintf(stderr, "writer pthread_rwlock_wrlock: %s\n", strerror(ret));
	208	abort();
	209	}
	210
2b4e4125	211	test_array.a = 0;
10c48e14	212	test_array.a = 8;
a0b7f7ea	213	if (caa_unlikely(wduration))
31b598e0	214	loop_sleep(wduration);
89a6a9ce MJ	215
	216	ret = pthread_rwlock_unlock(&lock);
	217	if (ret) {
	218	fprintf(stderr, "writer pthread_rwlock_unlock: %s\n", strerror(ret));
	219	abort();
	220	}
	221
bd252a04	222	URCU_TLS(nr_writes)++;
a0b7f7ea	223	if (caa_unlikely(!test_duration_write()))
10c48e14	224	break;
a0b7f7ea	225	if (caa_unlikely(wdelay))
9e31d0f0	226	loop_sleep(wdelay);
10c48e14	227	}
bd252a04	228	*count = URCU_TLS(nr_writes);
aae4fe1d MJ	229
	230	printf_verbose("thread_end %s, tid %lu, count %llu\n",
	231	"writer", urcu_get_thread_id(), *count);
10c48e14 MD	232	return ((void*)2);
	233	}
	234
61c3fb60	235	static
70469b43	236	void show_usage(char **argv)
10c48e14	237	{
06637138 MD	238	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	239	argv[0]);
	240	printf("OPTIONS:\n");
06637138 MD	241	printf(" [-d delay] (writer period (us))\n");
	242	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	243	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	244	printf(" [-v] (verbose output)\n");
	245	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
10c48e14 MD	246	printf("\n");
	247	}
	248
	249	int main(int argc, char **argv)
	250	{
	251	int err;
	252	pthread_t tid_reader, tid_writer;
	253	void *tret;
	254	unsigned long long count_reader, count_writer;
	255	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	256	int i, a;
83e334d0	257	unsigned int i_thr;
10c48e14 MD	258
10c48e14 MD	259	if (argc < 4) {
70469b43	260	show_usage(argv);
10c48e14 MD	261	return -1;
10c48e14 MD	262	}
5481ddb3	263	cmm_smp_mb();
10c48e14 MD	264
	265	err = sscanf(argv[1], "%u", &nr_readers);
	266	if (err != 1) {
70469b43	267	show_usage(argv);
10c48e14 MD	268	return -1;
	269	}
	270
	271	err = sscanf(argv[2], "%u", &nr_writers);
	272	if (err != 1) {
70469b43	273	show_usage(argv);
10c48e14 MD	274	return -1;
	275	}
	276
	277	err = sscanf(argv[3], "%lu", &duration);
	278	if (err != 1) {
70469b43	279	show_usage(argv);
10c48e14 MD	280	return -1;
	281	}
	282
	283	for (i = 4; i < argc; i++) {
	284	if (argv[i][0] != '-')
	285	continue;
	286	switch (argv[i][1]) {
9e97e478 MD	287	case 'a':
9e97e478 MD	288	if (argc < i + 2) {
70469b43	289	show_usage(argv);
9e97e478 MD	290	return -1;
	291	}
	292	a = atoi(argv[++i]);
2a7ac59d	293	cpu_affinities[next_aff++] = a;
9e97e478	294	use_affinity = 1;
4bad7d45	295	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	296	break;
8b632bab MD	297	case 'c':
8b632bab MD	298	if (argc < i + 2) {
70469b43	299	show_usage(argv);
8b632bab MD	300	return -1;
8b632bab MD	301	}
9e31d0f0	302	rduration = atol(argv[++i]);
8b632bab	303	break;
10c48e14 MD	304	case 'd':
10c48e14 MD	305	if (argc < i + 2) {
70469b43	306	show_usage(argv);
10c48e14 MD	307	return -1;
10c48e14 MD	308	}
9e31d0f0	309	wdelay = atol(argv[++i]);
10c48e14	310	break;
31b598e0 MD	311	case 'e':
31b598e0 MD	312	if (argc < i + 2) {
70469b43	313	show_usage(argv);
31b598e0 MD	314	return -1;
	315	}
	316	wduration = atol(argv[++i]);
	317	break;
4bad7d45 MD	318	case 'v':
	319	verbose_mode = 1;
	320	break;
10c48e14 MD	321	}
	322	}
	323
4bad7d45	324	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14	325	duration, nr_readers, nr_writers);
9e31d0f0	326	printf_verbose("Writer delay : %lu loops.\n", wdelay);
aae4fe1d	327	printf_verbose("Writer duration : %lu loops.\n", wduration);
4bad7d45	328	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	329	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	330	"main", urcu_get_thread_id());
10c48e14	331
89a6a9ce MJ	332	err = pthread_rwlock_init(&lock, NULL);
	333	if (err != 0) {
	334	fprintf(stderr, "pthread_rwlock_init: (%d) %s\n", err, strerror(err));
	335	exit(1);
	336	}
	337
9aa14175 MD	338	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	339	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	340	count_reader = calloc(nr_readers, sizeof(*count_reader));
	341	count_writer = calloc(nr_writers, sizeof(*count_writer));
10c48e14	342
2a7ac59d MD	343	next_aff = 0;
2a7ac59d MD	344
83e334d0 MJ	345	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
	346	err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
	347	&count_reader[i_thr]);
10c48e14 MD	348	if (err != 0)
	349	exit(1);
	350	}
83e334d0 MJ	351	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
	352	err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
	353	&count_writer[i_thr]);
10c48e14 MD	354	if (err != 0)
	355	exit(1);
	356	}
	357
5481ddb3	358	cmm_smp_mb();
10c48e14	359
78efb485 MD	360	test_go = 1;
	361
	362	sleep(duration);
	363
	364	test_stop = 1;
	365
83e334d0 MJ	366	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
83e334d0 MJ	367	err = pthread_join(tid_reader[i_thr], &tret);
10c48e14 MD	368	if (err != 0)
10c48e14 MD	369	exit(1);
83e334d0	370	tot_reads += count_reader[i_thr];
10c48e14	371	}
83e334d0 MJ	372	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
83e334d0 MJ	373	err = pthread_join(tid_writer[i_thr], &tret);
10c48e14 MD	374	if (err != 0)
10c48e14 MD	375	exit(1);
83e334d0	376	tot_writes += count_writer[i_thr];
10c48e14	377	}
4bad7d45 MD	378
4bad7d45 MD	379	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14	380	tot_writes);
a50a7b43	381	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d	382	"nr_writers %3u "
9e31d0f0	383	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	384	argv[0], duration, nr_readers, rduration, wduration,
4bad7d45 MD	385	nr_writers, wdelay, tot_reads, tot_writes,
	386	tot_reads + tot_writes);
	387
89a6a9ce MJ	388	err = pthread_rwlock_destroy(&lock);
	389	if (err != 0) {
	390	fprintf(stderr, "pthread_rwlock_destroy: (%d) %s\n", err, strerror(err));
	391	exit(1);
	392	}
10c48e14 MD	393	free(tid_reader);
	394	free(tid_writer);
	395	free(count_reader);
	396	free(count_writer);
	397	return 0;
	398	}