[urcu.git] / test_qsbr.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 "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

#define _LGPL_SOURCE
#include "urcu-qsbr.h"

struct test_array {
	int a;
};

static volatile int test_go, test_stop;

static unsigned long wdelay;

static struct test_array *test_rcu_pointer;

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 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);
	}
}

/*
 * malloc/free are reusing memory areas too quickly, which does not let us
 * test races appropriately. Use a large circular array for allocations.
 * ARRAY_SIZE is larger than nr_writers, which insures we never run over our tail.
 */
#define ARRAY_SIZE (1048576 * nr_writers)
#define ARRAY_POISON 0xDEADBEEF
static int array_index;
static struct test_array *test_array;

static struct test_array *test_array_alloc(void)
{
	struct test_array *ret;
	int index;

	rcu_copy_mutex_lock();
	index = array_index % ARRAY_SIZE;
	assert(test_array[index].a == ARRAY_POISON ||
		test_array[index].a == 0);
	ret = &test_array[index];
	array_index++;
	if (array_index == ARRAY_SIZE)
		array_index = 0;
	rcu_copy_mutex_unlock();
	return ret;
}

static void test_array_free(struct test_array *ptr)
{
	if (!ptr)
		return;
	rcu_copy_mutex_lock();
	ptr->a = ARRAY_POISON;
	rcu_copy_mutex_unlock();
}

void *thr_reader(void *_count)
{
	unsigned long long *count = _count;
	struct test_array *local_ptr;

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

	set_affinity();

	rcu_register_thread();

	while (!test_go)
	{
	}
	smp_mb();

	for (;;) {
		_rcu_read_lock();
		local_ptr = _rcu_dereference(test_rcu_pointer);
		debug_yield_read();
		if (local_ptr)
			assert(local_ptr->a == 8);
		if (unlikely(rduration))
			loop_sleep(rduration);
		_rcu_read_unlock();
		nr_reads++;
		/* QS each 1024 reads */
		if (unlikely((nr_reads & ((1 << 10) - 1)) == 0))
			_rcu_quiescent_state();
		if (unlikely(!test_duration_read()))
			break;
	}

	rcu_unregister_thread();

	*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;
	struct test_array *new, *old;

	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 (;;) {
		new = test_array_alloc();
		new->a = 8;
		old = _rcu_publish_content(&test_rcu_pointer, new);
		/* can be done after unlock */
		if (old)
			old->a = 0;
		test_array_free(old);
		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(" [-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;
	}

	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());

	test_array = malloc(sizeof(*test_array) * ARRAY_SIZE);
	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);
	}

	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 "
		"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);
	test_array_free(test_rcu_pointer);
	free(test_array);
	free(tid_reader);
	free(tid_writer);
	free(count_reader);
	free(count_writer);
	return 0;
}
Commit	Line	Data
061159a0 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
061159a0 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>
061159a0	35
7685d963 MD	36	#include "arch.h"
7685d963 MD	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
061159a0 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	#define _LGPL_SOURCE
	60	#include "urcu-qsbr.h"
	61
	62	struct test_array {
	63	int a;
	64	};
	65
78efb485	66	static volatile int test_go, test_stop;
061159a0	67
9e31d0f0	68	static unsigned long wdelay;
061159a0 MD	69
	70	static struct test_array *test_rcu_pointer;
	71
	72	static unsigned long duration;
061159a0	73
daddf5b0	74	/* read-side C.S. duration, in loops */
8b632bab MD	75	static unsigned long rduration;
8b632bab MD	76
daddf5b0 MD	77	static inline void loop_sleep(unsigned long l)
	78	{
	79	while(l-- != 0)
	80	cpu_relax();
	81	}
	82
4bad7d45 MD	83	static int verbose_mode;
	84
	85	#define printf_verbose(fmt, args...) \
	86	do { \
	87	if (verbose_mode) \
	88	printf(fmt, args); \
	89	} while (0)
	90
2a7ac59d MD	91	static unsigned int cpu_affinities[NR_CPUS];
	92	static unsigned int next_aff = 0;
	93	static int use_affinity = 0;
	94
6af882ba MD	95	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	96
2a7ac59d MD	97	static void set_affinity(void)
	98	{
	99	cpu_set_t mask;
	100	int cpu;
6af882ba	101	int ret;
2a7ac59d MD	102
	103	if (!use_affinity)
	104	return;
	105
6af882ba MD	106	ret = pthread_mutex_lock(&affinity_mutex);
	107	if (ret) {
	108	perror("Error in pthread mutex lock");
	109	exit(-1);
	110	}
2a7ac59d	111	cpu = cpu_affinities[next_aff++];
6af882ba MD	112	ret = pthread_mutex_unlock(&affinity_mutex);
	113	if (ret) {
	114	perror("Error in pthread mutex unlock");
	115	exit(-1);
	116	}
2a7ac59d MD	117	CPU_ZERO(&mask);
	118	CPU_SET(cpu, &mask);
	119	sched_setaffinity(0, sizeof(mask), &mask);
	120	}
	121
061159a0 MD	122	/*
	123	* returns 0 if test should end.
	124	*/
	125	static int test_duration_write(void)
	126	{
78efb485	127	return !test_stop;
061159a0 MD	128	}
	129
	130	static int test_duration_read(void)
	131	{
78efb485	132	return !test_stop;
061159a0 MD	133	}
	134
	135	static unsigned long long __thread nr_writes;
	136	static unsigned long long __thread nr_reads;
	137
	138	static unsigned int nr_readers;
	139	static unsigned int nr_writers;
	140
	141	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	142
	143	void rcu_copy_mutex_lock(void)
	144	{
	145	int ret;
	146	ret = pthread_mutex_lock(&rcu_copy_mutex);
	147	if (ret) {
	148	perror("Error in pthread mutex lock");
	149	exit(-1);
	150	}
	151	}
	152
	153	void rcu_copy_mutex_unlock(void)
	154	{
	155	int ret;
	156
	157	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	158	if (ret) {
	159	perror("Error in pthread mutex unlock");
	160	exit(-1);
	161	}
	162	}
	163
	164	/*
	165	* malloc/free are reusing memory areas too quickly, which does not let us
	166	* test races appropriately. Use a large circular array for allocations.
	167	* ARRAY_SIZE is larger than nr_writers, which insures we never run over our tail.
	168	*/
	169	#define ARRAY_SIZE (1048576 * nr_writers)
	170	#define ARRAY_POISON 0xDEADBEEF
	171	static int array_index;
	172	static struct test_array *test_array;
	173
	174	static struct test_array *test_array_alloc(void)
	175	{
	176	struct test_array *ret;
	177	int index;
	178
	179	rcu_copy_mutex_lock();
	180	index = array_index % ARRAY_SIZE;
	181	assert(test_array[index].a == ARRAY_POISON \|\|
	182	test_array[index].a == 0);
	183	ret = &test_array[index];
	184	array_index++;
	185	if (array_index == ARRAY_SIZE)
	186	array_index = 0;
	187	rcu_copy_mutex_unlock();
	188	return ret;
	189	}
	190
	191	static void test_array_free(struct test_array *ptr)
	192	{
	193	if (!ptr)
	194	return;
	195	rcu_copy_mutex_lock();
	196	ptr->a = ARRAY_POISON;
197	rcu_copy_mutex_unlock();
198	}
199
200	void thr_reader(void _count)
201	{
202	unsigned long long *count = _count;
203	struct test_array *local_ptr;
204
4bad7d45	205	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
061159a0 MD	206	"reader", pthread_self(), (unsigned long)gettid());
061159a0 MD	207
2a7ac59d MD	208	set_affinity();
2a7ac59d MD	209
061159a0 MD	210	rcu_register_thread();
	211
	212	while (!test_go)
	213	{
	214	}
7685d963	215	smp_mb();
061159a0 MD	216
	217	for (;;) {
	218	_rcu_read_lock();
	219	local_ptr = _rcu_dereference(test_rcu_pointer);
	220	debug_yield_read();
	221	if (local_ptr)
	222	assert(local_ptr->a == 8);
8b632bab	223	if (unlikely(rduration))
daddf5b0	224	loop_sleep(rduration);
061159a0 MD	225	_rcu_read_unlock();
061159a0 MD	226	nr_reads++;
78efb485	227	/* QS each 1024 reads */
59d5a406	228	if (unlikely((nr_reads & ((1 << 10) - 1)) == 0))
061159a0	229	_rcu_quiescent_state();
59d5a406	230	if (unlikely(!test_duration_read()))
061159a0 MD	231	break;
	232	}
	233
	234	rcu_unregister_thread();
	235
	236	*count = nr_reads;
4bad7d45	237	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
061159a0 MD	238	"reader", pthread_self(), (unsigned long)gettid());
	239	return ((void*)1);
	240
	241	}
	242
	243	void thr_writer(void _count)
	244	{
	245	unsigned long long *count = _count;
	246	struct test_array new, old;
	247
4bad7d45	248	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
061159a0 MD	249	"writer", pthread_self(), (unsigned long)gettid());
061159a0 MD	250
2a7ac59d MD	251	set_affinity();
2a7ac59d MD	252
061159a0 MD	253	while (!test_go)
	254	{
	255	}
7685d963	256	smp_mb();
061159a0 MD	257
	258	for (;;) {
	259	new = test_array_alloc();
061159a0 MD	260	new->a = 8;
061159a0 MD	261	old = _rcu_publish_content(&test_rcu_pointer, new);
061159a0 MD	262	/* can be done after unlock */
	263	if (old)
	264	old->a = 0;
	265	test_array_free(old);
	266	nr_writes++;
59d5a406	267	if (unlikely(!test_duration_write()))
061159a0	268	break;
59d5a406	269	if (unlikely(wdelay))
9e31d0f0	270	loop_sleep(wdelay);
061159a0 MD	271	}
061159a0 MD	272
4bad7d45	273	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
061159a0 MD	274	"writer", pthread_self(), (unsigned long)gettid());
	275	*count = nr_writes;
	276	return ((void*)2);
	277	}
	278
	279	void show_usage(int argc, char **argv)
	280	{
	281	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	282	#ifdef DEBUG_YIELD
	283	printf(" [-r] [-w] (yield reader and/or writer)");
	284	#endif
7685d963	285	printf(" [-d delay] (writer period (us))");
daddf5b0	286	printf(" [-c duration] (reader C.S. duration (in loops))");
4bad7d45	287	printf(" [-v] (verbose output)");
9e97e478	288	printf(" [-a cpu#] [-a cpu#]... (affinity)");
061159a0 MD	289	printf("\n");
	290	}
	291
	292	int main(int argc, char **argv)
	293	{
	294	int err;
	295	pthread_t tid_reader, tid_writer;
	296	void *tret;
	297	unsigned long long count_reader, count_writer;
	298	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	299	int i, a;
061159a0 MD	300
	301	if (argc < 4) {
	302	show_usage(argc, argv);
	303	return -1;
	304	}
	305
	306	err = sscanf(argv[1], "%u", &nr_readers);
	307	if (err != 1) {
	308	show_usage(argc, argv);
	309	return -1;
	310	}
	311
	312	err = sscanf(argv[2], "%u", &nr_writers);
	313	if (err != 1) {
	314	show_usage(argc, argv);
	315	return -1;
	316	}
	317
	318	err = sscanf(argv[3], "%lu", &duration);
	319	if (err != 1) {
	320	show_usage(argc, argv);
	321	return -1;
	322	}
	323
	324	for (i = 4; i < argc; i++) {
	325	if (argv[i][0] != '-')
	326	continue;
	327	switch (argv[i][1]) {
	328	#ifdef DEBUG_YIELD
	329	case 'r':
	330	yield_active \|= YIELD_READ;
	331	break;
	332	case 'w':
	333	yield_active \|= YIELD_WRITE;
	334	break;
	335	#endif
9e97e478 MD	336	case 'a':
	337	if (argc < i + 2) {
	338	show_usage(argc, argv);
	339	return -1;
	340	}
	341	a = atoi(argv[++i]);
2a7ac59d	342	cpu_affinities[next_aff++] = a;
9e97e478	343	use_affinity = 1;
4bad7d45	344	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	345	break;
8b632bab MD	346	case 'c':
	347	if (argc < i + 2) {
	348	show_usage(argc, argv);
	349	return -1;
	350	}
9e31d0f0	351	rduration = atol(argv[++i]);
8b632bab	352	break;
061159a0 MD	353	case 'd':
	354	if (argc < i + 2) {
	355	show_usage(argc, argv);
	356	return -1;
	357	}
9e31d0f0	358	wdelay = atol(argv[++i]);
061159a0	359	break;
4bad7d45 MD	360	case 'v':
	361	verbose_mode = 1;
	362	break;
061159a0 MD	363	}
	364	}
	365
4bad7d45	366	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
061159a0	367	duration, nr_readers, nr_writers);
9e31d0f0	368	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 MD	369	printf_verbose("Reader duration : %lu loops.\n", rduration);
4bad7d45 MD	370	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
061159a0 MD	371	"main", pthread_self(), (unsigned long)gettid());
	372
	373	test_array = malloc(sizeof(test_array) ARRAY_SIZE);
	374	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	375	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	376	count_reader = malloc(sizeof(count_reader) nr_readers);
	377	count_writer = malloc(sizeof(count_writer) nr_writers);
	378
2a7ac59d MD	379	next_aff = 0;
2a7ac59d MD	380
061159a0 MD	381	for (i = 0; i < nr_readers; i++) {
	382	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	383	&count_reader[i]);
	384	if (err != 0)
	385	exit(1);
	386	}
	387	for (i = 0; i < nr_writers; i++) {
	388	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	389	&count_writer[i]);
	390	if (err != 0)
	391	exit(1);
	392	}
	393
7685d963	394	smp_mb();
061159a0	395
78efb485 MD	396	test_go = 1;
	397
	398	sleep(duration);
	399
	400	test_stop = 1;
	401
061159a0 MD	402	for (i = 0; i < nr_readers; i++) {
	403	err = pthread_join(tid_reader[i], &tret);
	404	if (err != 0)
	405	exit(1);
	406	tot_reads += count_reader[i];
	407	}
	408	for (i = 0; i < nr_writers; i++) {
	409	err = pthread_join(tid_writer[i], &tret);
	410	if (err != 0)
	411	exit(1);
	412	tot_writes += count_writer[i];
	413	}
	414
4bad7d45	415	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
061159a0	416	tot_writes);
6a190115	417	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
cda3c71d	418	"nr_writers %3u "
9e31d0f0	419	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
4bad7d45 MD	420	argv[0], duration, nr_readers, rduration,
	421	nr_writers, wdelay, tot_reads, tot_writes,
	422	tot_reads + tot_writes);
061159a0 MD	423	test_array_free(test_rcu_pointer);
	424	free(test_array);
	425	free(tid_reader);
	426	free(tid_writer);
	427	free(count_reader);
	428	free(count_writer);
	429	return 0;
	430	}