[urcu.git] / tests / 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 <sys/syscall.h>
#include <sched.h>
#include <errno.h>

#include <urcu/arch.h>

/* 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
#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 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_write(void)
{
	return !test_stop;
}

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

static unsigned long long __thread nr_writes;
static unsigned long long __thread 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, thread id : %lx, tid %lu\n",
			"reader", pthread_self(), (unsigned long)gettid());

	set_affinity();

	while (!test_go)
	{
	}

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

	*count = nr_reads;
	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
			"reader", pthread_self(), (unsigned long)gettid());
	return ((void*)1);

}

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

	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
			"writer", pthread_self(), (unsigned long)gettid());

	set_affinity();

	while (!test_go)
	{
	}
	cmm_smp_mb();

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

	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
			"writer", pthread_self(), (unsigned long)gettid());
	*count = nr_writes;
	return ((void*)2);
}

void show_usage(int argc, char **argv)
{
	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
#ifdef DEBUG_YIELD
	printf(" [-r] [-w] (yield reader and/or writer)");
#endif
	printf(" [-d delay] (writer period (us))");
	printf(" [-c duration] (reader C.S. duration (in loops))");
	printf(" [-e duration] (writer C.S. duration (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_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, thread id : %lx, tid %lu\n",
			"main", pthread_self(), (unsigned long)gettid());

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

	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
d8540fc5	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>
	34	#include <sys/syscall.h>
9e97e478	35	#include <sched.h>
94b343fd	36	#include <errno.h>
10c48e14	37
ec4e58a3	38	#include <urcu/arch.h>
7685d963	39
2a7ac59d MD	40	/* hardcoded number of CPUs */
	41	#define NR_CPUS 16384
	42
10c48e14 MD	43	#if defined(_syscall0)
	44	_syscall0(pid_t, gettid)
	45	#elif defined(__NR_gettid)
	46	static inline pid_t gettid(void)
	47	{
	48	return syscall(__NR_gettid);
	49	}
	50	#else
	51	#warning "use pid as tid"
	52	static inline pid_t gettid(void)
	53	{
	54	return getpid();
	55	}
	56	#endif
	57
	58	#ifndef DYNAMIC_LINK_TEST
	59	#define _LGPL_SOURCE
	60	#else
	61	#define debug_yield_read()
	62	#endif
ec4e58a3	63	#include <urcu.h>
10c48e14 MD	64
	65	struct test_array {
	66	int a;
	67	};
	68
	69	pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
	70
78efb485	71	static volatile int test_go, test_stop;
10c48e14	72
9e31d0f0	73	static unsigned long wdelay;
10c48e14	74
2b4e4125	75	static volatile struct test_array test_array = { 8 };
10c48e14 MD	76
10c48e14 MD	77	static unsigned long duration;
10c48e14	78
daddf5b0	79	/* read-side C.S. duration, in loops */
8b632bab MD	80	static unsigned long rduration;
8b632bab MD	81
31b598e0 MD	82	/* write-side C.S. duration, in loops */
	83	static unsigned long wduration;
	84
daddf5b0 MD	85	static inline void loop_sleep(unsigned long l)
	86	{
	87	while(l-- != 0)
06f22bdb	88	caa_cpu_relax();
daddf5b0 MD	89	}
daddf5b0 MD	90
4bad7d45 MD	91	static int verbose_mode;
	92
	93	#define printf_verbose(fmt, args...) \
	94	do { \
	95	if (verbose_mode) \
	96	printf(fmt, args); \
	97	} while (0)
	98
2a7ac59d MD	99	static unsigned int cpu_affinities[NR_CPUS];
	100	static unsigned int next_aff = 0;
	101	static int use_affinity = 0;
	102
6af882ba MD	103	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	104
d8540fc5 PA	105	#ifndef HAVE_CPU_SET_T
	106	typedef unsigned long cpu_set_t;
	107	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	108	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	109	#endif
	110
2a7ac59d MD	111	static void set_affinity(void)
	112	{
	113	cpu_set_t mask;
	114	int cpu;
6af882ba	115	int ret;
2a7ac59d MD	116
	117	if (!use_affinity)
	118	return;
	119
d8540fc5	120	#if HAVE_SCHED_SETAFFINITY
6af882ba MD	121	ret = pthread_mutex_lock(&affinity_mutex);
	122	if (ret) {
	123	perror("Error in pthread mutex lock");
	124	exit(-1);
	125	}
2a7ac59d	126	cpu = cpu_affinities[next_aff++];
6af882ba MD	127	ret = pthread_mutex_unlock(&affinity_mutex);
	128	if (ret) {
	129	perror("Error in pthread mutex unlock");
	130	exit(-1);
	131	}
d8540fc5	132
2a7ac59d MD	133	CPU_ZERO(&mask);
2a7ac59d MD	134	CPU_SET(cpu, &mask);
d8540fc5 PA	135	#if SCHED_SETAFFINITY_ARGS == 2
	136	sched_setaffinity(0, &mask);
	137	#else
2a7ac59d	138	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5 PA	139	#endif
d8540fc5 PA	140	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	141	}
2a7ac59d MD	142
10c48e14 MD	143	/*
	144	* returns 0 if test should end.
	145	*/
	146	static int test_duration_write(void)
	147	{
78efb485	148	return !test_stop;
10c48e14 MD	149	}
	150
	151	static int test_duration_read(void)
	152	{
78efb485	153	return !test_stop;
10c48e14 MD	154	}
	155
	156	static unsigned long long __thread nr_writes;
	157	static unsigned long long __thread nr_reads;
	158
	159	static unsigned int nr_readers;
	160	static unsigned int nr_writers;
	161
	162	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	163
	164	void rcu_copy_mutex_lock(void)
	165	{
	166	int ret;
	167	ret = pthread_mutex_lock(&rcu_copy_mutex);
	168	if (ret) {
	169	perror("Error in pthread mutex lock");
	170	exit(-1);
	171	}
	172	}
	173
	174	void rcu_copy_mutex_unlock(void)
	175	{
	176	int ret;
	177
	178	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	179	if (ret) {
	180	perror("Error in pthread mutex unlock");
	181	exit(-1);
	182	}
	183	}
	184
	185	void thr_reader(void _count)
	186	{
	187	unsigned long long *count = _count;
	188
4bad7d45	189	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
10c48e14 MD	190	"reader", pthread_self(), (unsigned long)gettid());
10c48e14 MD	191
2a7ac59d MD	192	set_affinity();
2a7ac59d MD	193
10c48e14 MD	194	while (!test_go)
	195	{
	196	}
	197
	198	for (;;) {
	199	pthread_rwlock_rdlock(&lock);
	200	assert(test_array.a == 8);
8b632bab	201	if (unlikely(rduration))
daddf5b0	202	loop_sleep(rduration);
10c48e14 MD	203	pthread_rwlock_unlock(&lock);
10c48e14 MD	204	nr_reads++;
59d5a406	205	if (unlikely(!test_duration_read()))
10c48e14 MD	206	break;
	207	}
	208
	209	*count = nr_reads;
4bad7d45	210	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
10c48e14 MD	211	"reader", pthread_self(), (unsigned long)gettid());
	212	return ((void*)1);
	213
	214	}
	215
	216	void thr_writer(void _count)
	217	{
	218	unsigned long long *count = _count;
	219
4bad7d45	220	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
10c48e14 MD	221	"writer", pthread_self(), (unsigned long)gettid());
10c48e14 MD	222
2a7ac59d MD	223	set_affinity();
2a7ac59d MD	224
10c48e14 MD	225	while (!test_go)
	226	{
	227	}
5481ddb3	228	cmm_smp_mb();
10c48e14 MD	229
	230	for (;;) {
	231	pthread_rwlock_wrlock(&lock);
2b4e4125	232	test_array.a = 0;
10c48e14	233	test_array.a = 8;
31b598e0 MD	234	if (unlikely(wduration))
31b598e0 MD	235	loop_sleep(wduration);
10c48e14 MD	236	pthread_rwlock_unlock(&lock);
10c48e14 MD	237	nr_writes++;
59d5a406	238	if (unlikely(!test_duration_write()))
10c48e14	239	break;
59d5a406	240	if (unlikely(wdelay))
9e31d0f0	241	loop_sleep(wdelay);
10c48e14 MD	242	}
10c48e14 MD	243
4bad7d45	244	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
10c48e14 MD	245	"writer", pthread_self(), (unsigned long)gettid());
	246	*count = nr_writes;
	247	return ((void*)2);
	248	}
	249
	250	void show_usage(int argc, char **argv)
	251	{
	252	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	253	#ifdef DEBUG_YIELD
	254	printf(" [-r] [-w] (yield reader and/or writer)");
	255	#endif
7685d963	256	printf(" [-d delay] (writer period (us))");
daddf5b0	257	printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0	258	printf(" [-e duration] (writer C.S. duration (in loops))");
4bad7d45	259	printf(" [-v] (verbose output)");
9e97e478	260	printf(" [-a cpu#] [-a cpu#]... (affinity)");
10c48e14 MD	261	printf("\n");
	262	}
	263
	264	int main(int argc, char **argv)
	265	{
	266	int err;
	267	pthread_t tid_reader, tid_writer;
	268	void *tret;
	269	unsigned long long count_reader, count_writer;
	270	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	271	int i, a;
10c48e14 MD	272
	273	if (argc < 4) {
	274	show_usage(argc, argv);
	275	return -1;
	276	}
5481ddb3	277	cmm_smp_mb();
10c48e14 MD	278
	279	err = sscanf(argv[1], "%u", &nr_readers);
	280	if (err != 1) {
	281	show_usage(argc, argv);
	282	return -1;
	283	}
	284
	285	err = sscanf(argv[2], "%u", &nr_writers);
	286	if (err != 1) {
	287	show_usage(argc, argv);
	288	return -1;
	289	}
	290
	291	err = sscanf(argv[3], "%lu", &duration);
	292	if (err != 1) {
	293	show_usage(argc, argv);
	294	return -1;
	295	}
	296
	297	for (i = 4; i < argc; i++) {
	298	if (argv[i][0] != '-')
	299	continue;
	300	switch (argv[i][1]) {
	301	#ifdef DEBUG_YIELD
	302	case 'r':
	303	yield_active \|= YIELD_READ;
	304	break;
	305	case 'w':
	306	yield_active \|= YIELD_WRITE;
	307	break;
	308	#endif
9e97e478 MD	309	case 'a':
	310	if (argc < i + 2) {
	311	show_usage(argc, argv);
	312	return -1;
	313	}
	314	a = atoi(argv[++i]);
2a7ac59d	315	cpu_affinities[next_aff++] = a;
9e97e478	316	use_affinity = 1;
4bad7d45	317	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	318	break;
8b632bab MD	319	case 'c':
	320	if (argc < i + 2) {
	321	show_usage(argc, argv);
	322	return -1;
	323	}
9e31d0f0	324	rduration = atol(argv[++i]);
8b632bab	325	break;
10c48e14 MD	326	case 'd':
	327	if (argc < i + 2) {
	328	show_usage(argc, argv);
	329	return -1;
	330	}
9e31d0f0	331	wdelay = atol(argv[++i]);
10c48e14	332	break;
31b598e0 MD	333	case 'e':
	334	if (argc < i + 2) {
	335	show_usage(argc, argv);
	336	return -1;
	337	}
	338	wduration = atol(argv[++i]);
	339	break;
4bad7d45 MD	340	case 'v':
	341	verbose_mode = 1;
	342	break;
10c48e14 MD	343	}
	344	}
	345
4bad7d45	346	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14	347	duration, nr_readers, nr_writers);
9e31d0f0	348	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 MD	349	printf_verbose("Reader duration : %lu loops.\n", rduration);
4bad7d45 MD	350	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
10c48e14 MD	351	"main", pthread_self(), (unsigned long)gettid());
	352
	353	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	354	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	355	count_reader = malloc(sizeof(count_reader) nr_readers);
	356	count_writer = malloc(sizeof(count_writer) nr_writers);
	357
2a7ac59d MD	358	next_aff = 0;
2a7ac59d MD	359
10c48e14 MD	360	for (i = 0; i < nr_readers; i++) {
	361	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	362	&count_reader[i]);
	363	if (err != 0)
	364	exit(1);
	365	}
	366	for (i = 0; i < nr_writers; i++) {
	367	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	368	&count_writer[i]);
	369	if (err != 0)
	370	exit(1);
	371	}
	372
5481ddb3	373	cmm_smp_mb();
10c48e14	374
78efb485 MD	375	test_go = 1;
	376
	377	sleep(duration);
	378
	379	test_stop = 1;
	380
10c48e14 MD	381	for (i = 0; i < nr_readers; i++) {
	382	err = pthread_join(tid_reader[i], &tret);
	383	if (err != 0)
	384	exit(1);
	385	tot_reads += count_reader[i];
	386	}
	387	for (i = 0; i < nr_writers; i++) {
	388	err = pthread_join(tid_writer[i], &tret);
	389	if (err != 0)
	390	exit(1);
	391	tot_writes += count_writer[i];
	392	}
4bad7d45 MD	393
4bad7d45 MD	394	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14	395	tot_writes);
a50a7b43	396	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d	397	"nr_writers %3u "
9e31d0f0	398	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	399	argv[0], duration, nr_readers, rduration, wduration,
4bad7d45 MD	400	nr_writers, wdelay, tot_reads, tot_writes,
	401	tot_reads + tot_writes);
	402
10c48e14 MD	403	free(tid_reader);
	404	free(tid_writer);
	405	free(count_reader);
	406	free(count_writer);
	407	return 0;
	408	}