[userspace-rcu.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.
 */

#define _GNU_SOURCE
#include "config.h"
#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
#else
#define debug_yield_read()
#endif
#include <urcu.h>

struct test_array {
	int a;
};

pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;

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);
#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;

void rcu_copy_mutex_lock(void)
{
	int ret;
	ret = pthread_mutex_lock(&rcu_copy_mutex);
	if (ret) {
		perror("Error in pthread mutex lock");
		exit(-1);
	}
}

void rcu_copy_mutex_unlock(void)
{
	int ret;

	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	if (ret) {
		perror("Error in pthread mutex unlock");
		exit(-1);
	}
}

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 (;;) {
		pthread_rwlock_rdlock(&lock);
		assert(test_array.a == 8);
		if (caa_unlikely(rduration))
			loop_sleep(rduration);
		pthread_rwlock_unlock(&lock);
		URCU_TLS(nr_reads)++;
		if (caa_unlikely(!test_duration_read()))
			break;
	}

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

}

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 (;;) {
		pthread_rwlock_wrlock(&lock);
		test_array.a = 0;
		test_array.a = 8;
		if (caa_unlikely(wduration))
			loop_sleep(wduration);
		pthread_rwlock_unlock(&lock);
		URCU_TLS(nr_writes)++;
		if (caa_unlikely(!test_duration_write()))
			break;
		if (caa_unlikely(wdelay))
			loop_sleep(wdelay);
	}

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

void show_usage(int argc, char **argv)
{
	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
		argv[0]);
	printf("OPTIONS:\n");
#ifdef DEBUG_YIELD
	printf("	[-r] [-w] (yield reader and/or writer)\n");
#endif
	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;

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

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

	err = sscanf(argv[2], "%u", &nr_writers);
	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]) {
#ifdef DEBUG_YIELD
		case 'r':
			yield_active |= YIELD_READ;
			break;
		case 'w':
			yield_active |= YIELD_WRITE;
			break;
#endif
		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 'e':
			if (argc < i + 2) {
				show_usage(argc, 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("Reader duration : %lu loops.\n", rduration);
	printf_verbose("thread %-6s, tid %lu\n",
			"main", urcu_get_thread_id());

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

	cmm_smp_mb();

	test_go = 1;

	sleep(duration);

	test_stop = 1;

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

	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);

	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
9e97e478	23	#define _GNU_SOURCE
f5ab766e	24	#include "config.h"
10c48e14 MD	25	#include <stdio.h>
	26	#include <pthread.h>
	27	#include <stdlib.h>
	28	#include <string.h>
	29	#include <sys/types.h>
	30	#include <sys/wait.h>
	31	#include <unistd.h>
	32	#include <stdio.h>
	33	#include <assert.h>
94b343fd	34	#include <errno.h>
10c48e14	35
ec4e58a3	36	#include <urcu/arch.h>
bd252a04	37	#include <urcu/tls-compat.h>
2953b501	38	#include "cpuset.h"
94df6318	39	#include "thread-id.h"
65fcc7e9	40
2a7ac59d MD	41	/* hardcoded number of CPUs */
	42	#define NR_CPUS 16384
	43
10c48e14 MD	44	#ifndef DYNAMIC_LINK_TEST
	45	#define _LGPL_SOURCE
	46	#else
	47	#define debug_yield_read()
	48	#endif
ec4e58a3	49	#include <urcu.h>
10c48e14 MD	50
	51	struct test_array {
	52	int a;
	53	};
	54
	55	pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
	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	{
95bc7fb9	93	#if 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
d8540fc5	101	#if 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
	145	void rcu_copy_mutex_lock(void)
	146	{
	147	int ret;
	148	ret = pthread_mutex_lock(&rcu_copy_mutex);
	149	if (ret) {
	150	perror("Error in pthread mutex lock");
	151	exit(-1);
	152	}
	153	}
	154
	155	void rcu_copy_mutex_unlock(void)
	156	{
	157	int ret;
	158
	159	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	160	if (ret) {
	161	perror("Error in pthread mutex unlock");
	162	exit(-1);
	163	}
	164	}
	165
	166	void thr_reader(void _count)
	167	{
	168	unsigned long long *count = _count;
	169
94df6318 MD	170	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	171	"reader", urcu_get_thread_id());
10c48e14	172
2a7ac59d MD	173	set_affinity();
2a7ac59d MD	174
10c48e14 MD	175	while (!test_go)
	176	{
	177	}
	178
	179	for (;;) {
	180	pthread_rwlock_rdlock(&lock);
	181	assert(test_array.a == 8);
a0b7f7ea	182	if (caa_unlikely(rduration))
daddf5b0	183	loop_sleep(rduration);
10c48e14	184	pthread_rwlock_unlock(&lock);
bd252a04	185	URCU_TLS(nr_reads)++;
a0b7f7ea	186	if (caa_unlikely(!test_duration_read()))
10c48e14 MD	187	break;
	188	}
	189
bd252a04	190	*count = URCU_TLS(nr_reads);
94df6318 MD	191	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	192	"reader", urcu_get_thread_id());
10c48e14 MD	193	return ((void*)1);
	194
	195	}
	196
	197	void thr_writer(void _count)
	198	{
	199	unsigned long long *count = _count;
	200
94df6318 MD	201	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	202	"writer", urcu_get_thread_id());
10c48e14	203
2a7ac59d MD	204	set_affinity();
2a7ac59d MD	205
10c48e14 MD	206	while (!test_go)
	207	{
	208	}
5481ddb3	209	cmm_smp_mb();
10c48e14 MD	210
	211	for (;;) {
	212	pthread_rwlock_wrlock(&lock);
2b4e4125	213	test_array.a = 0;
10c48e14	214	test_array.a = 8;
a0b7f7ea	215	if (caa_unlikely(wduration))
31b598e0	216	loop_sleep(wduration);
10c48e14	217	pthread_rwlock_unlock(&lock);
bd252a04	218	URCU_TLS(nr_writes)++;
a0b7f7ea	219	if (caa_unlikely(!test_duration_write()))
10c48e14	220	break;
a0b7f7ea	221	if (caa_unlikely(wdelay))
9e31d0f0	222	loop_sleep(wdelay);
10c48e14 MD	223	}
10c48e14 MD	224
94df6318 MD	225	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	226	"writer", urcu_get_thread_id());
bd252a04	227	*count = URCU_TLS(nr_writes);
10c48e14 MD	228	return ((void*)2);
	229	}
	230
	231	void show_usage(int argc, char **argv)
	232	{
06637138 MD	233	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	234	argv[0]);
	235	printf("OPTIONS:\n");
10c48e14	236	#ifdef DEBUG_YIELD
06637138	237	printf(" [-r] [-w] (yield reader and/or writer)\n");
10c48e14	238	#endif
06637138 MD	239	printf(" [-d delay] (writer period (us))\n");
	240	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	241	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	242	printf(" [-v] (verbose output)\n");
	243	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
10c48e14 MD	244	printf("\n");
	245	}
	246
	247	int main(int argc, char **argv)
	248	{
	249	int err;
	250	pthread_t tid_reader, tid_writer;
	251	void *tret;
	252	unsigned long long count_reader, count_writer;
	253	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	254	int i, a;
10c48e14 MD	255
	256	if (argc < 4) {
	257	show_usage(argc, argv);
	258	return -1;
	259	}
5481ddb3	260	cmm_smp_mb();
10c48e14 MD	261
	262	err = sscanf(argv[1], "%u", &nr_readers);
	263	if (err != 1) {
	264	show_usage(argc, argv);
	265	return -1;
	266	}
	267
	268	err = sscanf(argv[2], "%u", &nr_writers);
	269	if (err != 1) {
	270	show_usage(argc, argv);
	271	return -1;
	272	}
	273
	274	err = sscanf(argv[3], "%lu", &duration);
	275	if (err != 1) {
	276	show_usage(argc, argv);
	277	return -1;
	278	}
	279
	280	for (i = 4; i < argc; i++) {
	281	if (argv[i][0] != '-')
	282	continue;
	283	switch (argv[i][1]) {
	284	#ifdef DEBUG_YIELD
	285	case 'r':
	286	yield_active \|= YIELD_READ;
	287	break;
	288	case 'w':
	289	yield_active \|= YIELD_WRITE;
	290	break;
	291	#endif
9e97e478 MD	292	case 'a':
	293	if (argc < i + 2) {
	294	show_usage(argc, argv);
	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':
	303	if (argc < i + 2) {
	304	show_usage(argc, argv);
	305	return -1;
	306	}
9e31d0f0	307	rduration = atol(argv[++i]);
8b632bab	308	break;
10c48e14 MD	309	case 'd':
	310	if (argc < i + 2) {
	311	show_usage(argc, argv);
	312	return -1;
	313	}
9e31d0f0	314	wdelay = atol(argv[++i]);
10c48e14	315	break;
31b598e0 MD	316	case 'e':
	317	if (argc < i + 2) {
	318	show_usage(argc, argv);
	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);
4bad7d45	332	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	333	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	334	"main", urcu_get_thread_id());
10c48e14	335
9aa14175 MD	336	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	337	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	338	count_reader = calloc(nr_readers, sizeof(*count_reader));
	339	count_writer = calloc(nr_writers, sizeof(*count_writer));
10c48e14	340
2a7ac59d MD	341	next_aff = 0;
2a7ac59d MD	342
10c48e14 MD	343	for (i = 0; i < nr_readers; i++) {
	344	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	345	&count_reader[i]);
	346	if (err != 0)
	347	exit(1);
	348	}
	349	for (i = 0; i < nr_writers; i++) {
	350	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	351	&count_writer[i]);
	352	if (err != 0)
	353	exit(1);
	354	}
	355
5481ddb3	356	cmm_smp_mb();
10c48e14	357
78efb485 MD	358	test_go = 1;
	359
	360	sleep(duration);
	361
	362	test_stop = 1;
	363
10c48e14 MD	364	for (i = 0; i < nr_readers; i++) {
	365	err = pthread_join(tid_reader[i], &tret);
	366	if (err != 0)
	367	exit(1);
	368	tot_reads += count_reader[i];
	369	}
	370	for (i = 0; i < nr_writers; i++) {
	371	err = pthread_join(tid_writer[i], &tret);
	372	if (err != 0)
	373	exit(1);
	374	tot_writes += count_writer[i];
	375	}
4bad7d45 MD	376
4bad7d45 MD	377	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14	378	tot_writes);
a50a7b43	379	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d	380	"nr_writers %3u "
9e31d0f0	381	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	382	argv[0], duration, nr_readers, rduration, wduration,
4bad7d45 MD	383	nr_writers, wdelay, tot_reads, tot_writes,
	384	tot_reads + tot_writes);
	385
10c48e14 MD	386	free(tid_reader);
	387	free(tid_writer);
	388	free(count_reader);
	389	free(count_writer);
	390	return 0;
	391	}