[urcu.git] / tests / test_perthreadlock.c

/*
 * test_urcu.c
 *
 * Userspace RCU library - test program
 *
 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
 *
 * 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 <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 <urcu/arch.h>

/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
#define CACHE_LINE_SIZE 4096

/* 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;
};

struct per_thread_lock {
	pthread_mutex_t lock;
} __attribute__((aligned(CACHE_LINE_SIZE)));	/* cache-line aligned */

static struct per_thread_lock *per_thread_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;

static inline void loop_sleep(unsigned long l)
{
	while(l-- != 0)
		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)
{
	cpu_set_t mask;
	int cpu;
	int ret;

	if (!use_affinity)
		return;

	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);
}

/*
 * 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 long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;
static
unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_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 *data)
{
	unsigned long tidx = (unsigned long)data;

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

	set_affinity();

	while (!test_go)
	{
	}

	for (;;) {
		pthread_mutex_lock(&per_thread_lock[tidx].lock);
		assert(test_array.a == 8);
		if (unlikely(rduration))
			loop_sleep(rduration);
		pthread_mutex_unlock(&per_thread_lock[tidx].lock);
		nr_reads++;
		if (unlikely(!test_duration_read()))
			break;
	}

	tot_nr_reads[tidx] = 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 *data)
{
	unsigned long wtidx = (unsigned long)data;
	long tidx;

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

	set_affinity();

	while (!test_go)
	{
	}
	smp_mb();

	for (;;) {
		for (tidx = 0; tidx < nr_readers; tidx++) {
			pthread_mutex_lock(&per_thread_lock[tidx].lock);
		}
		test_array.a = 0;
		test_array.a = 8;
		for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
			pthread_mutex_unlock(&per_thread_lock[tidx].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());
	tot_nr_writes[wtidx] = 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(" [-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;
	}
	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 '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);
	tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers);
	tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
	per_thread_lock = malloc(sizeof(*per_thread_lock) * nr_readers);

	next_aff = 0;

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

	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 += tot_nr_reads[i];
	}
	for (i = 0; i < nr_writers; i++) {
		err = pthread_join(tid_writer[i], &tret);
		if (err != 0)
			exit(1);
		tot_writes += tot_nr_writes[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 "
		"nr_writers %3u "
		"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
		argv[0], duration, nr_readers, rduration,
		nr_writers, wdelay, tot_reads, tot_writes,
		tot_reads + tot_writes);

	free(tid_reader);
	free(tid_writer);
	free(count_reader);
	free(count_writer);
	free(tot_nr_reads);
	free(tot_nr_writes);
	free(per_thread_lock);
	return 0;
}
Commit	Line	Data
0ee8bb0a MD	1	/*
	2	* test_urcu.c
	3	*
	4	* Userspace RCU library - test program
	5	*
	6	* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
	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
0ee8bb0a MD	24	#include <stdio.h>
	25	#include <pthread.h>
	26	#include <stdlib.h>
	27	#include <string.h>
	28	#include <sys/types.h>
	29	#include <sys/wait.h>
	30	#include <unistd.h>
	31	#include <stdio.h>
	32	#include <assert.h>
	33	#include <sys/syscall.h>
9e97e478	34	#include <sched.h>
0ee8bb0a	35
ec4e58a3	36	#include <urcu/arch.h>
0ee8bb0a	37
55271c13 MD	38	/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
	39	#define CACHE_LINE_SIZE 4096
	40
2a7ac59d MD	41	/* hardcoded number of CPUs */
	42	#define NR_CPUS 16384
	43
0ee8bb0a MD	44	#if defined(_syscall0)
	45	_syscall0(pid_t, gettid)
	46	#elif defined(__NR_gettid)
	47	static inline pid_t gettid(void)
	48	{
	49	return syscall(__NR_gettid);
	50	}
	51	#else
	52	#warning "use pid as tid"
	53	static inline pid_t gettid(void)
	54	{
	55	return getpid();
	56	}
	57	#endif
	58
	59	#ifndef DYNAMIC_LINK_TEST
	60	#define _LGPL_SOURCE
	61	#else
	62	#define debug_yield_read()
	63	#endif
ec4e58a3	64	#include <urcu.h>
0ee8bb0a MD	65
	66	struct test_array {
	67	int a;
	68	};
	69
	70	struct per_thread_lock {
	71	pthread_mutex_t lock;
55271c13	72	} __attribute__((aligned(CACHE_LINE_SIZE))); /* cache-line aligned */
0ee8bb0a MD	73
	74	static struct per_thread_lock *per_thread_lock;
	75
78efb485	76	static volatile int test_go, test_stop;
0ee8bb0a	77
9e31d0f0	78	static unsigned long wdelay;
0ee8bb0a	79
2b4e4125	80	static volatile struct test_array test_array = { 8 };
0ee8bb0a MD	81
0ee8bb0a MD	82	static unsigned long duration;
0ee8bb0a	83
daddf5b0	84	/* read-side C.S. duration, in loops */
8b632bab MD	85	static unsigned long rduration;
8b632bab MD	86
daddf5b0 MD	87	static inline void loop_sleep(unsigned long l)
	88	{
	89	while(l-- != 0)
	90	cpu_relax();
	91	}
	92
4bad7d45 MD	93	static int verbose_mode;
	94
	95	#define printf_verbose(fmt, args...) \
	96	do { \
	97	if (verbose_mode) \
	98	printf(fmt, args); \
	99	} while (0)
	100
2a7ac59d MD	101	static unsigned int cpu_affinities[NR_CPUS];
	102	static unsigned int next_aff = 0;
	103	static int use_affinity = 0;
	104
6af882ba MD	105	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	106
2a7ac59d MD	107	static void set_affinity(void)
	108	{
	109	cpu_set_t mask;
	110	int cpu;
6af882ba	111	int ret;
2a7ac59d MD	112
	113	if (!use_affinity)
	114	return;
	115
6af882ba MD	116	ret = pthread_mutex_lock(&affinity_mutex);
	117	if (ret) {
	118	perror("Error in pthread mutex lock");
	119	exit(-1);
	120	}
2a7ac59d	121	cpu = cpu_affinities[next_aff++];
6af882ba MD	122	ret = pthread_mutex_unlock(&affinity_mutex);
	123	if (ret) {
	124	perror("Error in pthread mutex unlock");
	125	exit(-1);
	126	}
2a7ac59d MD	127	CPU_ZERO(&mask);
	128	CPU_SET(cpu, &mask);
	129	sched_setaffinity(0, sizeof(mask), &mask);
	130	}
	131
0ee8bb0a MD	132	/*
	133	* returns 0 if test should end.
	134	*/
	135	static int test_duration_write(void)
	136	{
78efb485	137	return !test_stop;
0ee8bb0a MD	138	}
	139
	140	static int test_duration_read(void)
	141	{
78efb485	142	return !test_stop;
0ee8bb0a MD	143	}
	144
	145	static unsigned long long __thread nr_writes;
	146	static unsigned long long __thread nr_reads;
	147
55271c13 MD	148	static
	149	unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;
	150	static
	151	unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_reads;
0ee8bb0a MD	152
	153	static unsigned int nr_readers;
	154	static unsigned int nr_writers;
	155
	156	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	157
	158	void rcu_copy_mutex_lock(void)
	159	{
	160	int ret;
	161	ret = pthread_mutex_lock(&rcu_copy_mutex);
	162	if (ret) {
	163	perror("Error in pthread mutex lock");
	164	exit(-1);
	165	}
	166	}
	167
	168	void rcu_copy_mutex_unlock(void)
	169	{
	170	int ret;
	171
	172	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	173	if (ret) {
	174	perror("Error in pthread mutex unlock");
	175	exit(-1);
	176	}
	177	}
	178
	179	void thr_reader(void data)
	180	{
	181	unsigned long tidx = (unsigned long)data;
	182
4bad7d45	183	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	184	"reader", pthread_self(), (unsigned long)gettid());
0ee8bb0a MD	185
2a7ac59d MD	186	set_affinity();
2a7ac59d MD	187
0ee8bb0a MD	188	while (!test_go)
	189	{
	190	}
	191
	192	for (;;) {
	193	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	194	assert(test_array.a == 8);
8b632bab	195	if (unlikely(rduration))
daddf5b0	196	loop_sleep(rduration);
0ee8bb0a MD	197	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
0ee8bb0a MD	198	nr_reads++;
59d5a406	199	if (unlikely(!test_duration_read()))
0ee8bb0a MD	200	break;
	201	}
	202
	203	tot_nr_reads[tidx] = nr_reads;
cda3c71d	204	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	205	"reader", pthread_self(), (unsigned long)gettid());
	206	return ((void*)1);
	207
	208	}
	209
	210	void thr_writer(void data)
	211	{
	212	unsigned long wtidx = (unsigned long)data;
	213	long tidx;
	214
4bad7d45	215	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	216	"writer", pthread_self(), (unsigned long)gettid());
0ee8bb0a MD	217
2a7ac59d MD	218	set_affinity();
2a7ac59d MD	219
0ee8bb0a MD	220	while (!test_go)
	221	{
	222	}
	223	smp_mb();
	224
	225	for (;;) {
	226	for (tidx = 0; tidx < nr_readers; tidx++) {
	227	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	228	}
2b4e4125	229	test_array.a = 0;
0ee8bb0a	230	test_array.a = 8;
f120cc10	231	for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
0ee8bb0a MD	232	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
	233	}
	234	nr_writes++;
59d5a406	235	if (unlikely(!test_duration_write()))
0ee8bb0a	236	break;
59d5a406	237	if (unlikely(wdelay))
9e31d0f0	238	loop_sleep(wdelay);
0ee8bb0a MD	239	}
0ee8bb0a MD	240
4bad7d45	241	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	242	"writer", pthread_self(), (unsigned long)gettid());
	243	tot_nr_writes[wtidx] = nr_writes;
	244	return ((void*)2);
	245	}
	246
	247	void show_usage(int argc, char **argv)
	248	{
	249	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	250	#ifdef DEBUG_YIELD
	251	printf(" [-r] [-w] (yield reader and/or writer)");
	252	#endif
	253	printf(" [-d delay] (writer period (us))");
daddf5b0	254	printf(" [-c duration] (reader C.S. duration (in loops))");
4bad7d45	255	printf(" [-v] (verbose output)");
9e97e478	256	printf(" [-a cpu#] [-a cpu#]... (affinity)");
0ee8bb0a MD	257	printf("\n");
	258	}
	259
	260	int main(int argc, char **argv)
	261	{
	262	int err;
	263	pthread_t tid_reader, tid_writer;
	264	void *tret;
	265	unsigned long long count_reader, count_writer;
	266	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	267	int i, a;
0ee8bb0a MD	268
	269	if (argc < 4) {
	270	show_usage(argc, argv);
	271	return -1;
	272	}
	273	smp_mb();
	274
	275	err = sscanf(argv[1], "%u", &nr_readers);
	276	if (err != 1) {
	277	show_usage(argc, argv);
	278	return -1;
	279	}
	280
	281	err = sscanf(argv[2], "%u", &nr_writers);
	282	if (err != 1) {
	283	show_usage(argc, argv);
	284	return -1;
	285	}
	286
	287	err = sscanf(argv[3], "%lu", &duration);
	288	if (err != 1) {
	289	show_usage(argc, argv);
	290	return -1;
	291	}
	292
	293	for (i = 4; i < argc; i++) {
	294	if (argv[i][0] != '-')
	295	continue;
	296	switch (argv[i][1]) {
	297	#ifdef DEBUG_YIELD
	298	case 'r':
	299	yield_active \|= YIELD_READ;
	300	break;
	301	case 'w':
	302	yield_active \|= YIELD_WRITE;
	303	break;
	304	#endif
9e97e478 MD	305	case 'a':
	306	if (argc < i + 2) {
	307	show_usage(argc, argv);
	308	return -1;
	309	}
	310	a = atoi(argv[++i]);
2a7ac59d	311	cpu_affinities[next_aff++] = a;
9e97e478	312	use_affinity = 1;
4bad7d45	313	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	314	break;
8b632bab MD	315	case 'c':
	316	if (argc < i + 2) {
	317	show_usage(argc, argv);
	318	return -1;
	319	}
9e31d0f0	320	rduration = atol(argv[++i]);
8b632bab	321	break;
0ee8bb0a MD	322	case 'd':
	323	if (argc < i + 2) {
	324	show_usage(argc, argv);
	325	return -1;
	326	}
9e31d0f0	327	wdelay = atol(argv[++i]);
0ee8bb0a	328	break;
4bad7d45 MD	329	case 'v':
	330	verbose_mode = 1;
	331	break;
0ee8bb0a MD	332	}
	333	}
	334
4bad7d45	335	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
0ee8bb0a	336	duration, nr_readers, nr_writers);
9e31d0f0	337	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 MD	338	printf_verbose("Reader duration : %lu loops.\n", rduration);
4bad7d45 MD	339	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	340	"main", pthread_self(), (unsigned long)gettid());
	341
	342	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	343	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	344	count_reader = malloc(sizeof(count_reader) nr_readers);
	345	count_writer = malloc(sizeof(count_writer) nr_writers);
	346	tot_nr_reads = malloc(sizeof(tot_nr_reads) nr_readers);
	347	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	348	per_thread_lock = malloc(sizeof(per_thread_lock) nr_readers);
	349
2a7ac59d MD	350	next_aff = 0;
2a7ac59d MD	351
0ee8bb0a MD	352	for (i = 0; i < nr_readers; i++) {
	353	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	354	(void *)(long)i);
	355	if (err != 0)
	356	exit(1);
	357	}
	358	for (i = 0; i < nr_writers; i++) {
	359	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	360	(void *)(long)i);
	361	if (err != 0)
	362	exit(1);
	363	}
	364
0ee8bb0a MD	365	smp_mb();
0ee8bb0a MD	366
78efb485 MD	367	test_go = 1;
	368
	369	sleep(duration);
	370
	371	test_stop = 1;
	372
0ee8bb0a MD	373	for (i = 0; i < nr_readers; i++) {
	374	err = pthread_join(tid_reader[i], &tret);
	375	if (err != 0)
	376	exit(1);
	377	tot_reads += tot_nr_reads[i];
	378	}
	379	for (i = 0; i < nr_writers; i++) {
	380	err = pthread_join(tid_writer[i], &tret);
	381	if (err != 0)
	382	exit(1);
	383	tot_writes += tot_nr_writes[i];
	384	}
4bad7d45 MD	385
4bad7d45 MD	386	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
0ee8bb0a	387	tot_writes);
6a190115	388	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
cda3c71d	389	"nr_writers %3u "
9e31d0f0	390	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
4bad7d45 MD	391	argv[0], duration, nr_readers, rduration,
	392	nr_writers, wdelay, tot_reads, tot_writes,
	393	tot_reads + tot_writes);
	394
0ee8bb0a MD	395	free(tid_reader);
	396	free(tid_writer);
	397	free(count_reader);
	398	free(count_writer);
	399	free(tot_nr_reads);
	400	free(tot_nr_writes);
	401	free(per_thread_lock);
	402	return 0;
	403	}