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

// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later

/*
 * Userspace RCU library - test program
 */

#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 <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>

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);
	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;
		urcu_posix_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
ce29b371 MJ	1	// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	2	//
	3	// SPDX-License-Identifier: GPL-2.0-or-later
	4
10c48e14	5	/*
10c48e14	6	* Userspace RCU library - test program
10c48e14 MD	7	*/
	8
	9	#include <stdio.h>
	10	#include <pthread.h>
	11	#include <stdlib.h>
	12	#include <string.h>
	13	#include <sys/types.h>
	14	#include <sys/wait.h>
	15	#include <unistd.h>
	16	#include <stdio.h>
94b343fd	17	#include <errno.h>
10c48e14	18
ec4e58a3	19	#include <urcu/arch.h>
01477510	20	#include <urcu/assert.h>
bd252a04	21	#include <urcu/tls-compat.h>
94df6318	22	#include "thread-id.h"
65fcc7e9	23
2a7ac59d MD	24	/* hardcoded number of CPUs */
	25	#define NR_CPUS 16384
	26
10c48e14 MD	27	#ifndef DYNAMIC_LINK_TEST
10c48e14 MD	28	#define _LGPL_SOURCE
10c48e14	29	#endif
ec4e58a3	30	#include <urcu.h>
10c48e14 MD	31
	32	struct test_array {
	33	int a;
	34	};
	35
89a6a9ce MJ	36	/*
	37	* static rwlock initializer is broken on Cygwin. Use runtime
	38	* initialization.
	39	*/
	40	pthread_rwlock_t lock;
10c48e14	41
78efb485	42	static volatile int test_go, test_stop;
10c48e14	43
9e31d0f0	44	static unsigned long wdelay;
10c48e14	45
2b4e4125	46	static volatile struct test_array test_array = { 8 };
10c48e14 MD	47
10c48e14 MD	48	static unsigned long duration;
10c48e14	49
daddf5b0	50	/* read-side C.S. duration, in loops */
8b632bab MD	51	static unsigned long rduration;
8b632bab MD	52
31b598e0 MD	53	/* write-side C.S. duration, in loops */
	54	static unsigned long wduration;
	55
ab0aacbe	56	static inline void loop_sleep(unsigned long loops)
daddf5b0	57	{
ab0aacbe	58	while (loops-- != 0)
06f22bdb	59	caa_cpu_relax();
daddf5b0 MD	60	}
daddf5b0 MD	61
4bad7d45 MD	62	static int verbose_mode;
	63
	64	#define printf_verbose(fmt, args...) \
	65	do { \
	66	if (verbose_mode) \
	67	printf(fmt, args); \
	68	} while (0)
	69
2a7ac59d MD	70	static unsigned int cpu_affinities[NR_CPUS];
	71	static unsigned int next_aff = 0;
	72	static int use_affinity = 0;
	73
6af882ba MD	74	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	75
2a7ac59d MD	76	static void set_affinity(void)
2a7ac59d MD	77	{
2388c075	78	#ifdef HAVE_SCHED_SETAFFINITY
2a7ac59d	79	cpu_set_t mask;
95bc7fb9 MD	80	int cpu, ret;
95bc7fb9 MD	81	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	82
	83	if (!use_affinity)
	84	return;
	85
2388c075	86	#ifdef HAVE_SCHED_SETAFFINITY
6af882ba MD	87	ret = pthread_mutex_lock(&affinity_mutex);
	88	if (ret) {
	89	perror("Error in pthread mutex lock");
	90	exit(-1);
	91	}
2a7ac59d	92	cpu = cpu_affinities[next_aff++];
6af882ba MD	93	ret = pthread_mutex_unlock(&affinity_mutex);
	94	if (ret) {
	95	perror("Error in pthread mutex unlock");
	96	exit(-1);
	97	}
d8540fc5	98
2a7ac59d MD	99	CPU_ZERO(&mask);
	100	CPU_SET(cpu, &mask);
	101	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5	102	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	103	}
2a7ac59d MD	104
10c48e14 MD	105	/*
	106	* returns 0 if test should end.
	107	*/
	108	static int test_duration_write(void)
	109	{
78efb485	110	return !test_stop;
10c48e14 MD	111	}
	112
	113	static int test_duration_read(void)
	114	{
78efb485	115	return !test_stop;
10c48e14 MD	116	}
10c48e14 MD	117
bd252a04 MD	118	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	119	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
10c48e14 MD	120
	121	static unsigned int nr_readers;
	122	static unsigned int nr_writers;
	123
	124	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	125
61c3fb60	126	static
10c48e14 MD	127	void thr_reader(void _count)
	128	{
	129	unsigned long long *count = _count;
	130
94df6318 MD	131	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	132	"reader", urcu_get_thread_id());
10c48e14	133
2a7ac59d MD	134	set_affinity();
2a7ac59d MD	135
10c48e14 MD	136	while (!test_go)
	137	{
	138	}
	139
	140	for (;;) {
89a6a9ce MJ	141	int a, ret;
	142
	143	ret = pthread_rwlock_rdlock(&lock);
	144	if (ret) {
	145	fprintf(stderr, "reader pthread_rwlock_rdlock: %s\n", strerror(ret));
	146	abort();
	147	}
efa8d2c8	148
efa8d2c8	149	a = test_array.a;
01477510	150	urcu_posix_assert(a == 8);
a0b7f7ea	151	if (caa_unlikely(rduration))
daddf5b0	152	loop_sleep(rduration);
89a6a9ce MJ	153
	154	ret = pthread_rwlock_unlock(&lock);
	155	if (ret) {
	156	fprintf(stderr, "reader pthread_rwlock_unlock: %s\n", strerror(ret));
	157	abort();
	158	}
	159
bd252a04	160	URCU_TLS(nr_reads)++;
a0b7f7ea	161	if (caa_unlikely(!test_duration_read()))
10c48e14 MD	162	break;
	163	}
	164
bd252a04	165	*count = URCU_TLS(nr_reads);
aae4fe1d MJ	166
	167	printf_verbose("thread_end %s, tid %lu, count %llu\n",
	168	"reader", urcu_get_thread_id(), *count);
10c48e14 MD	169	return ((void*)1);
	170
	171	}
	172
61c3fb60	173	static
10c48e14 MD	174	void thr_writer(void _count)
	175	{
	176	unsigned long long *count = _count;
	177
94df6318 MD	178	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	179	"writer", urcu_get_thread_id());
10c48e14	180
2a7ac59d MD	181	set_affinity();
2a7ac59d MD	182
10c48e14 MD	183	while (!test_go)
	184	{
	185	}
5481ddb3	186	cmm_smp_mb();
10c48e14 MD	187
10c48e14 MD	188	for (;;) {
89a6a9ce MJ	189	int ret;
	190
	191	ret = pthread_rwlock_wrlock(&lock);
	192	if (ret) {
	193	fprintf(stderr, "writer pthread_rwlock_wrlock: %s\n", strerror(ret));
	194	abort();
	195	}
	196
2b4e4125	197	test_array.a = 0;
10c48e14	198	test_array.a = 8;
a0b7f7ea	199	if (caa_unlikely(wduration))
31b598e0	200	loop_sleep(wduration);
89a6a9ce MJ	201
	202	ret = pthread_rwlock_unlock(&lock);
	203	if (ret) {
	204	fprintf(stderr, "writer pthread_rwlock_unlock: %s\n", strerror(ret));
	205	abort();
	206	}
	207
bd252a04	208	URCU_TLS(nr_writes)++;
a0b7f7ea	209	if (caa_unlikely(!test_duration_write()))
10c48e14	210	break;
a0b7f7ea	211	if (caa_unlikely(wdelay))
9e31d0f0	212	loop_sleep(wdelay);
10c48e14	213	}
bd252a04	214	*count = URCU_TLS(nr_writes);
aae4fe1d MJ	215
	216	printf_verbose("thread_end %s, tid %lu, count %llu\n",
	217	"writer", urcu_get_thread_id(), *count);
10c48e14 MD	218	return ((void*)2);
	219	}
	220
61c3fb60	221	static
70469b43	222	void show_usage(char **argv)
10c48e14	223	{
06637138 MD	224	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	225	argv[0]);
	226	printf("OPTIONS:\n");
06637138 MD	227	printf(" [-d delay] (writer period (us))\n");
	228	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	229	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	230	printf(" [-v] (verbose output)\n");
	231	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
10c48e14 MD	232	printf("\n");
	233	}
	234
	235	int main(int argc, char **argv)
	236	{
	237	int err;
	238	pthread_t tid_reader, tid_writer;
	239	void *tret;
	240	unsigned long long count_reader, count_writer;
	241	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	242	int i, a;
83e334d0	243	unsigned int i_thr;
10c48e14 MD	244
10c48e14 MD	245	if (argc < 4) {
70469b43	246	show_usage(argv);
10c48e14 MD	247	return -1;
10c48e14 MD	248	}
5481ddb3	249	cmm_smp_mb();
10c48e14 MD	250
	251	err = sscanf(argv[1], "%u", &nr_readers);
	252	if (err != 1) {
70469b43	253	show_usage(argv);
10c48e14 MD	254	return -1;
	255	}
	256
	257	err = sscanf(argv[2], "%u", &nr_writers);
	258	if (err != 1) {
70469b43	259	show_usage(argv);
10c48e14 MD	260	return -1;
	261	}
	262
	263	err = sscanf(argv[3], "%lu", &duration);
	264	if (err != 1) {
70469b43	265	show_usage(argv);
10c48e14 MD	266	return -1;
	267	}
	268
	269	for (i = 4; i < argc; i++) {
	270	if (argv[i][0] != '-')
	271	continue;
	272	switch (argv[i][1]) {
9e97e478 MD	273	case 'a':
9e97e478 MD	274	if (argc < i + 2) {
70469b43	275	show_usage(argv);
9e97e478 MD	276	return -1;
	277	}
	278	a = atoi(argv[++i]);
2a7ac59d	279	cpu_affinities[next_aff++] = a;
9e97e478	280	use_affinity = 1;
4bad7d45	281	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	282	break;
8b632bab MD	283	case 'c':
8b632bab MD	284	if (argc < i + 2) {
70469b43	285	show_usage(argv);
8b632bab MD	286	return -1;
8b632bab MD	287	}
9e31d0f0	288	rduration = atol(argv[++i]);
8b632bab	289	break;
10c48e14 MD	290	case 'd':
10c48e14 MD	291	if (argc < i + 2) {
70469b43	292	show_usage(argv);
10c48e14 MD	293	return -1;
10c48e14 MD	294	}
9e31d0f0	295	wdelay = atol(argv[++i]);
10c48e14	296	break;
31b598e0 MD	297	case 'e':
31b598e0 MD	298	if (argc < i + 2) {
70469b43	299	show_usage(argv);
31b598e0 MD	300	return -1;
	301	}
	302	wduration = atol(argv[++i]);
	303	break;
4bad7d45 MD	304	case 'v':
	305	verbose_mode = 1;
	306	break;
10c48e14 MD	307	}
	308	}
	309
4bad7d45	310	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14	311	duration, nr_readers, nr_writers);
9e31d0f0	312	printf_verbose("Writer delay : %lu loops.\n", wdelay);
aae4fe1d	313	printf_verbose("Writer duration : %lu loops.\n", wduration);
4bad7d45	314	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	315	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	316	"main", urcu_get_thread_id());
10c48e14	317
89a6a9ce MJ	318	err = pthread_rwlock_init(&lock, NULL);
	319	if (err != 0) {
	320	fprintf(stderr, "pthread_rwlock_init: (%d) %s\n", err, strerror(err));
	321	exit(1);
	322	}
	323
9aa14175 MD	324	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	325	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	326	count_reader = calloc(nr_readers, sizeof(*count_reader));
	327	count_writer = calloc(nr_writers, sizeof(*count_writer));
10c48e14	328
2a7ac59d MD	329	next_aff = 0;
2a7ac59d MD	330
83e334d0 MJ	331	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
	332	err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
	333	&count_reader[i_thr]);
10c48e14 MD	334	if (err != 0)
	335	exit(1);
	336	}
83e334d0 MJ	337	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
	338	err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
	339	&count_writer[i_thr]);
10c48e14 MD	340	if (err != 0)
	341	exit(1);
	342	}
	343
5481ddb3	344	cmm_smp_mb();
10c48e14	345
78efb485 MD	346	test_go = 1;
	347
	348	sleep(duration);
	349
	350	test_stop = 1;
	351
83e334d0 MJ	352	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
83e334d0 MJ	353	err = pthread_join(tid_reader[i_thr], &tret);
10c48e14 MD	354	if (err != 0)
10c48e14 MD	355	exit(1);
83e334d0	356	tot_reads += count_reader[i_thr];
10c48e14	357	}
83e334d0 MJ	358	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
83e334d0 MJ	359	err = pthread_join(tid_writer[i_thr], &tret);
10c48e14 MD	360	if (err != 0)
10c48e14 MD	361	exit(1);
83e334d0	362	tot_writes += count_writer[i_thr];
10c48e14	363	}
4bad7d45 MD	364
4bad7d45 MD	365	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14	366	tot_writes);
a50a7b43	367	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d	368	"nr_writers %3u "
9e31d0f0	369	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	370	argv[0], duration, nr_readers, rduration, wduration,
4bad7d45 MD	371	nr_writers, wdelay, tot_reads, tot_writes,
	372	tot_reads + tot_writes);
	373
89a6a9ce MJ	374	err = pthread_rwlock_destroy(&lock);
	375	if (err != 0) {
	376	fprintf(stderr, "pthread_rwlock_destroy: (%d) %s\n", err, strerror(err));
	377	exit(1);
	378	}
10c48e14 MD	379	free(tid_reader);
	380	free(tid_writer);
	381	free(count_reader);
	382	free(count_writer);
	383	return 0;
	384	}