[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 "cpuset.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)
{
#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);
#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_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>
2953b501	36	#include "cpuset.h"
94df6318	37	#include "thread-id.h"
65fcc7e9	38
2a7ac59d MD	39	/* hardcoded number of CPUs */
	40	#define NR_CPUS 16384
	41
10c48e14 MD	42	#ifndef DYNAMIC_LINK_TEST
10c48e14 MD	43	#define _LGPL_SOURCE
10c48e14	44	#endif
ec4e58a3	45	#include <urcu.h>
10c48e14 MD	46
	47	struct test_array {
	48	int a;
	49	};
	50
89a6a9ce MJ	51	/*
	52	* static rwlock initializer is broken on Cygwin. Use runtime
	53	* initialization.
	54	*/
	55	pthread_rwlock_t lock;
10c48e14	56
78efb485	57	static volatile int test_go, test_stop;
10c48e14	58
9e31d0f0	59	static unsigned long wdelay;
10c48e14	60
2b4e4125	61	static volatile struct test_array test_array = { 8 };
10c48e14 MD	62
10c48e14 MD	63	static unsigned long duration;
10c48e14	64
daddf5b0	65	/* read-side C.S. duration, in loops */
8b632bab MD	66	static unsigned long rduration;
8b632bab MD	67
31b598e0 MD	68	/* write-side C.S. duration, in loops */
	69	static unsigned long wduration;
	70
ab0aacbe	71	static inline void loop_sleep(unsigned long loops)
daddf5b0	72	{
ab0aacbe	73	while (loops-- != 0)
06f22bdb	74	caa_cpu_relax();
daddf5b0 MD	75	}
daddf5b0 MD	76
4bad7d45 MD	77	static int verbose_mode;
	78
	79	#define printf_verbose(fmt, args...) \
	80	do { \
	81	if (verbose_mode) \
	82	printf(fmt, args); \
	83	} while (0)
	84
2a7ac59d MD	85	static unsigned int cpu_affinities[NR_CPUS];
	86	static unsigned int next_aff = 0;
	87	static int use_affinity = 0;
	88
6af882ba MD	89	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	90
2a7ac59d MD	91	static void set_affinity(void)
2a7ac59d MD	92	{
a9e31859	93	#ifdef HAVE_SCHED_SETAFFINITY
2a7ac59d	94	cpu_set_t mask;
95bc7fb9 MD	95	int cpu, ret;
95bc7fb9 MD	96	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	97
	98	if (!use_affinity)
	99	return;
	100
a9e31859	101	#ifdef HAVE_SCHED_SETAFFINITY
6af882ba MD	102	ret = pthread_mutex_lock(&affinity_mutex);
	103	if (ret) {
	104	perror("Error in pthread mutex lock");
	105	exit(-1);
	106	}
2a7ac59d	107	cpu = cpu_affinities[next_aff++];
6af882ba MD	108	ret = pthread_mutex_unlock(&affinity_mutex);
	109	if (ret) {
	110	perror("Error in pthread mutex unlock");
	111	exit(-1);
	112	}
d8540fc5	113
2a7ac59d MD	114	CPU_ZERO(&mask);
2a7ac59d MD	115	CPU_SET(cpu, &mask);
d8540fc5 PA	116	#if SCHED_SETAFFINITY_ARGS == 2
	117	sched_setaffinity(0, &mask);
	118	#else
2a7ac59d	119	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5 PA	120	#endif
d8540fc5 PA	121	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	122	}
2a7ac59d MD	123
10c48e14 MD	124	/*
	125	* returns 0 if test should end.
	126	*/
	127	static int test_duration_write(void)
	128	{
78efb485	129	return !test_stop;
10c48e14 MD	130	}
	131
	132	static int test_duration_read(void)
	133	{
78efb485	134	return !test_stop;
10c48e14 MD	135	}
10c48e14 MD	136
bd252a04 MD	137	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	138	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
10c48e14 MD	139
	140	static unsigned int nr_readers;
	141	static unsigned int nr_writers;
	142
	143	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	144
e3717dbc	145	static
10c48e14 MD	146	void thr_reader(void _count)
	147	{
	148	unsigned long long *count = _count;
	149
94df6318 MD	150	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	151	"reader", urcu_get_thread_id());
10c48e14	152
2a7ac59d MD	153	set_affinity();
2a7ac59d MD	154
10c48e14 MD	155	while (!test_go)
	156	{
	157	}
	158
	159	for (;;) {
89a6a9ce MJ	160	int a, ret;
	161
	162	ret = pthread_rwlock_rdlock(&lock);
	163	if (ret) {
	164	fprintf(stderr, "reader pthread_rwlock_rdlock: %s\n", strerror(ret));
	165	abort();
	166	}
efa8d2c8	167
efa8d2c8 MD	168	a = test_array.a;
efa8d2c8 MD	169	assert(a == 8);
a0b7f7ea	170	if (caa_unlikely(rduration))
daddf5b0	171	loop_sleep(rduration);
89a6a9ce MJ	172
	173	ret = pthread_rwlock_unlock(&lock);
	174	if (ret) {
	175	fprintf(stderr, "reader pthread_rwlock_unlock: %s\n", strerror(ret));
	176	abort();
	177	}
	178
bd252a04	179	URCU_TLS(nr_reads)++;
a0b7f7ea	180	if (caa_unlikely(!test_duration_read()))
10c48e14 MD	181	break;
	182	}
	183
bd252a04	184	*count = URCU_TLS(nr_reads);
aae4fe1d MJ	185
	186	printf_verbose("thread_end %s, tid %lu, count %llu\n",
	187	"reader", urcu_get_thread_id(), *count);
10c48e14 MD	188	return ((void*)1);
	189
	190	}
	191
e3717dbc	192	static
10c48e14 MD	193	void thr_writer(void _count)
	194	{
	195	unsigned long long *count = _count;
	196
94df6318 MD	197	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	198	"writer", urcu_get_thread_id());
10c48e14	199
2a7ac59d MD	200	set_affinity();
2a7ac59d MD	201
10c48e14 MD	202	while (!test_go)
	203	{
	204	}
5481ddb3	205	cmm_smp_mb();
10c48e14 MD	206
10c48e14 MD	207	for (;;) {
89a6a9ce MJ	208	int ret;
	209
	210	ret = pthread_rwlock_wrlock(&lock);
	211	if (ret) {
	212	fprintf(stderr, "writer pthread_rwlock_wrlock: %s\n", strerror(ret));
	213	abort();
	214	}
	215
2b4e4125	216	test_array.a = 0;
10c48e14	217	test_array.a = 8;
a0b7f7ea	218	if (caa_unlikely(wduration))
31b598e0	219	loop_sleep(wduration);
89a6a9ce MJ	220
	221	ret = pthread_rwlock_unlock(&lock);
	222	if (ret) {
	223	fprintf(stderr, "writer pthread_rwlock_unlock: %s\n", strerror(ret));
	224	abort();
	225	}
	226
bd252a04	227	URCU_TLS(nr_writes)++;
a0b7f7ea	228	if (caa_unlikely(!test_duration_write()))
10c48e14	229	break;
a0b7f7ea	230	if (caa_unlikely(wdelay))
9e31d0f0	231	loop_sleep(wdelay);
10c48e14	232	}
bd252a04	233	*count = URCU_TLS(nr_writes);
aae4fe1d MJ	234
	235	printf_verbose("thread_end %s, tid %lu, count %llu\n",
	236	"writer", urcu_get_thread_id(), *count);
10c48e14 MD	237	return ((void*)2);
	238	}
	239
e3717dbc	240	static
17a8f206	241	void show_usage(char **argv)
10c48e14	242	{
06637138 MD	243	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	244	argv[0]);
	245	printf("OPTIONS:\n");
06637138 MD	246	printf(" [-d delay] (writer period (us))\n");
	247	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	248	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	249	printf(" [-v] (verbose output)\n");
	250	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
10c48e14 MD	251	printf("\n");
	252	}
	253
	254	int main(int argc, char **argv)
	255	{
	256	int err;
	257	pthread_t tid_reader, tid_writer;
	258	void *tret;
	259	unsigned long long count_reader, count_writer;
	260	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	261	int i, a;
83e334d0	262	unsigned int i_thr;
10c48e14 MD	263
10c48e14 MD	264	if (argc < 4) {
17a8f206	265	show_usage(argv);
10c48e14 MD	266	return -1;
10c48e14 MD	267	}
5481ddb3	268	cmm_smp_mb();
10c48e14 MD	269
	270	err = sscanf(argv[1], "%u", &nr_readers);
	271	if (err != 1) {
17a8f206	272	show_usage(argv);
10c48e14 MD	273	return -1;
	274	}
	275
	276	err = sscanf(argv[2], "%u", &nr_writers);
	277	if (err != 1) {
17a8f206	278	show_usage(argv);
10c48e14 MD	279	return -1;
	280	}
	281
	282	err = sscanf(argv[3], "%lu", &duration);
	283	if (err != 1) {
17a8f206	284	show_usage(argv);
10c48e14 MD	285	return -1;
	286	}
	287
	288	for (i = 4; i < argc; i++) {
	289	if (argv[i][0] != '-')
	290	continue;
	291	switch (argv[i][1]) {
9e97e478 MD	292	case 'a':
9e97e478 MD	293	if (argc < i + 2) {
17a8f206	294	show_usage(argv);
9e97e478 MD	295	return -1;
	296	}
	297	a = atoi(argv[++i]);
2a7ac59d	298	cpu_affinities[next_aff++] = a;
9e97e478	299	use_affinity = 1;
4bad7d45	300	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	301	break;
8b632bab MD	302	case 'c':
8b632bab MD	303	if (argc < i + 2) {
17a8f206	304	show_usage(argv);
8b632bab MD	305	return -1;
8b632bab MD	306	}
9e31d0f0	307	rduration = atol(argv[++i]);
8b632bab	308	break;
10c48e14 MD	309	case 'd':
10c48e14 MD	310	if (argc < i + 2) {
17a8f206	311	show_usage(argv);
10c48e14 MD	312	return -1;
10c48e14 MD	313	}
9e31d0f0	314	wdelay = atol(argv[++i]);
10c48e14	315	break;
31b598e0 MD	316	case 'e':
31b598e0 MD	317	if (argc < i + 2) {
17a8f206	318	show_usage(argv);
31b598e0 MD	319	return -1;
	320	}
	321	wduration = atol(argv[++i]);
	322	break;
4bad7d45 MD	323	case 'v':
	324	verbose_mode = 1;
	325	break;
10c48e14 MD	326	}
	327	}
	328
4bad7d45	329	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14	330	duration, nr_readers, nr_writers);
9e31d0f0	331	printf_verbose("Writer delay : %lu loops.\n", wdelay);
aae4fe1d	332	printf_verbose("Writer duration : %lu loops.\n", wduration);
4bad7d45	333	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	334	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	335	"main", urcu_get_thread_id());
10c48e14	336
89a6a9ce MJ	337	err = pthread_rwlock_init(&lock, NULL);
	338	if (err != 0) {
	339	fprintf(stderr, "pthread_rwlock_init: (%d) %s\n", err, strerror(err));
	340	exit(1);
	341	}
	342
9aa14175 MD	343	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	344	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	345	count_reader = calloc(nr_readers, sizeof(*count_reader));
	346	count_writer = calloc(nr_writers, sizeof(*count_writer));
10c48e14	347
2a7ac59d MD	348	next_aff = 0;
2a7ac59d MD	349
83e334d0 MJ	350	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
	351	err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
	352	&count_reader[i_thr]);
10c48e14 MD	353	if (err != 0)
	354	exit(1);
	355	}
83e334d0 MJ	356	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
	357	err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
	358	&count_writer[i_thr]);
10c48e14 MD	359	if (err != 0)
	360	exit(1);
	361	}
	362
5481ddb3	363	cmm_smp_mb();
10c48e14	364
78efb485 MD	365	test_go = 1;
	366
	367	sleep(duration);
	368
	369	test_stop = 1;
	370
83e334d0 MJ	371	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
83e334d0 MJ	372	err = pthread_join(tid_reader[i_thr], &tret);
10c48e14 MD	373	if (err != 0)
10c48e14 MD	374	exit(1);
83e334d0	375	tot_reads += count_reader[i_thr];
10c48e14	376	}
83e334d0 MJ	377	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
83e334d0 MJ	378	err = pthread_join(tid_writer[i_thr], &tret);
10c48e14 MD	379	if (err != 0)
10c48e14 MD	380	exit(1);
83e334d0	381	tot_writes += count_writer[i_thr];
10c48e14	382	}
4bad7d45 MD	383
4bad7d45 MD	384	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14	385	tot_writes);
a50a7b43	386	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d	387	"nr_writers %3u "
9e31d0f0	388	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	389	argv[0], duration, nr_readers, rduration, wduration,
4bad7d45 MD	390	nr_writers, wdelay, tot_reads, tot_writes,
	391	tot_reads + tot_writes);
	392
89a6a9ce MJ	393	err = pthread_rwlock_destroy(&lock);
	394	if (err != 0) {
	395	fprintf(stderr, "pthread_rwlock_destroy: (%d) %s\n", err, strerror(err));
	396	exit(1);
	397	}
10c48e14 MD	398	free(tid_reader);
	399	free(tid_writer);
	400	free(count_reader);
	401	free(count_writer);
	402	return 0;
	403	}